Make changes required for CIci

100 files changed, 55083 insertions, 21 deletions

diff --git a/bpkg/argument-grouping.cxx b/bpkg/argument-grouping.cxx
new file mode 100644
index 0000000..abbae6f
--- /dev/null
+++ b/bpkg/argument-grouping.cxx
@@ -0,0 +1,85 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+// Begin prologue.
+//
+#include <bpkg/types-parsers.hxx>
+//
+// End prologue.
+
+#include <bpkg/argument-grouping.hxx>
+
+#include <map>
+#include <cstring>
+
+namespace bpkg
+{
+  ::bpkg::cli::usage_para
+  print_bpkg_argument_grouping_usage (::std::ostream& os, ::bpkg::cli::usage_para p)
+  {
+    CLI_POTENTIALLY_UNUSED (os);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mSYNOPSIS\033[0m" << ::std::endl
+       << ::std::endl
+       << "\033[1mbpkg\033[0m \033[1m{\033[0m \033[4moptions\033[0m \033[1m}+\033[0m \033[4margument\033[0m \033[1m+{\033[0m \033[4moptions\033[0m \033[1m}\033[0m\033[0m" << ::std::endl
+       << ::std::endl
+       << "\033[1mDESCRIPTION\033[0m" << ::std::endl
+       << ::std::endl
+       << "For certain commands certain options and command line variables can be grouped" << ::std::endl
+       << "to only apply to specific arguments. This help topic describes the argument" << ::std::endl
+       << "grouping facility used for this purpose." << ::std::endl
+       << ::std::endl
+       << "Groups can be specified before (leading) and/or after (trailing) the argument" << ::std::endl
+       << "they apply to. A leading group starts with '\033[1m{\033[0m' and ends with '\033[1m}+\033[0m' while a" << ::std::endl
+       << "trailing group starts with '\033[1m+{\033[0m' and ends with '\033[1m}\033[0m'. For example:" << ::std::endl
+       << ::std::endl
+       << "{ --foo --bar }+ arg   # 'arg' with '--foo' '--bar'" << ::std::endl
+       << "arg +{ fox=1 baz=2 }   # 'arg' with 'fox=1' 'baz=2'" << ::std::endl
+       << ::std::endl
+       << "Multiple leading and/or trailing groups can be specified for the same argument." << ::std::endl
+       << "For example:" << ::std::endl
+       << ::std::endl
+       << "{ -f }+ { -b }+ arg +{ f=1 } +{ b=2 } # 'arg' with '-f' 'b' 'f=1' 'b=2'" << ::std::endl
+       << ::std::endl
+       << "The group applies to a single argument only unless multiple arguments are" << ::std::endl
+       << "themselves grouped with '\033[1m{\033[0m' and '\033[1m}\033[0m'. For example:" << ::std::endl
+       << ::std::endl
+       << "{ --foo }+ arg1  arg2 +{ --bar }      # 'arg1' with '--foo'" << ::std::endl
+       << "                                      # 'arg2' with '--bar'" << ::std::endl
+       << ::std::endl
+       << "{ --foo }+ { arg1  arg2 } +{ --bar }  # 'arg1' with '--foo' '--bar'" << ::std::endl
+       << "                                      # 'arg2' with '--foo' '--bar'" << ::std::endl
+       << ::std::endl
+       << "The group separators ('\033[1m{\033[0m', '\033[1m}+'\033[0m, etc) must be separate command line arguments." << ::std::endl
+       << "In particular, they must not be adjacent either to the arguments inside the" << ::std::endl
+       << "group nor to the argument they apply to. All such cases will be treated as" << ::std::endl
+       << "ordinary arguments. For example:" << ::std::endl
+       << ::std::endl
+       << "{--foo}+ arg   # '{--foo}+' ..." << ::std::endl
+       << "arg+{ --foo }  # 'arg+{' ..." << ::std::endl
+       << ::std::endl
+       << "If one of the group separators needs to be specified as an argument verbatim," << ::std::endl
+       << "then it must be escaped with '\033[1m\\\033[0m'. For example:" << ::std::endl
+       << ::std::endl
+       << "}             # error: unexpected group separator" << ::std::endl
+       << "}x            # '}x'" << ::std::endl
+       << "\\}            # '}'" << ::std::endl
+       << "{ \\}+ }+ arg  # 'arg' with '}+'" << ::std::endl;
+
+    p = ::bpkg::cli::usage_para::text;
+
+    return p;
+  }
+}
+
+// Begin epilogue.
+//
+//
+// End epilogue.
+
diff --git a/bpkg/argument-grouping.hxx b/bpkg/argument-grouping.hxx
new file mode 100644
index 0000000..64019de
--- /dev/null
+++ b/bpkg/argument-grouping.hxx
@@ -0,0 +1,31 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+#ifndef BPKG_ARGUMENT_GROUPING_HXX
+#define BPKG_ARGUMENT_GROUPING_HXX
+
+// Begin prologue.
+//
+//
+// End prologue.
+
+#include <bpkg/common-options.hxx>
+
+// Print page usage information.
+//
+namespace bpkg
+{
+  ::bpkg::cli::usage_para
+  print_bpkg_argument_grouping_usage (::std::ostream&,
+                                      ::bpkg::cli::usage_para = ::bpkg::cli::usage_para::none);
+}
+
+// Begin epilogue.
+//
+//
+// End epilogue.
+
+#endif // BPKG_ARGUMENT_GROUPING_HXX
diff --git a/bpkg/bpkg-options.cxx b/bpkg/bpkg-options.cxx
new file mode 100644
index 0000000..0ebf02f
--- /dev/null
+++ b/bpkg/bpkg-options.cxx
@@ -0,0 +1,1560 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+// Begin prologue.
+//
+#include <bpkg/types-parsers.hxx>
+//
+// End prologue.
+
+#include <bpkg/bpkg-options.hxx>
+
+#include <map>
+#include <set>
+#include <string>
+#include <vector>
+#include <utility>
+#include <ostream>
+#include <sstream>
+
+namespace bpkg
+{
+  namespace cli
+  {
+    template <typename X>
+    struct parser
+    {
+      static void
+      parse (X& x, bool& xs, scanner& s)
+      {
+        using namespace std;
+
+        const char* o (s.next ());
+        if (s.more ())
+        {
+          string v (s.next ());
+          istringstream is (v);
+          if (!(is >> x && is.peek () == istringstream::traits_type::eof ()))
+            throw invalid_value (o, v);
+        }
+        else
+          throw missing_value (o);
+
+        xs = true;
+      }
+
+      static void
+      merge (X& b, const X& a)
+      {
+        b = a;
+      }
+    };
+
+    template <>
+    struct parser<bool>
+    {
+      static void
+      parse (bool& x, scanner& s)
+      {
+        s.next ();
+        x = true;
+      }
+
+      static void
+      merge (bool& b, const bool&)
+      {
+        b = true;
+      }
+    };
+
+    template <>
+    struct parser<std::string>
+    {
+      static void
+      parse (std::string& x, bool& xs, scanner& s)
+      {
+        const char* o (s.next ());
+
+        if (s.more ())
+          x = s.next ();
+        else
+          throw missing_value (o);
+
+        xs = true;
+      }
+
+      static void
+      merge (std::string& b, const std::string& a)
+      {
+        b = a;
+      }
+    };
+
+    template <typename X>
+    struct parser<std::pair<X, std::size_t> >
+    {
+      static void
+      parse (std::pair<X, std::size_t>& x, bool& xs, scanner& s)
+      {
+        x.second = s.position ();
+        parser<X>::parse (x.first, xs, s);
+      }
+
+      static void
+      merge (std::pair<X, std::size_t>& b, const std::pair<X, std::size_t>& a)
+      {
+        b = a;
+      }
+    };
+
+    template <typename X>
+    struct parser<std::vector<X> >
+    {
+      static void
+      parse (std::vector<X>& c, bool& xs, scanner& s)
+      {
+        X x;
+        bool dummy;
+        parser<X>::parse (x, dummy, s);
+        c.push_back (x);
+        xs = true;
+      }
+
+      static void
+      merge (std::vector<X>& b, const std::vector<X>& a)
+      {
+        b.insert (b.end (), a.begin (), a.end ());
+      }
+    };
+
+    template <typename X, typename C>
+    struct parser<std::set<X, C> >
+    {
+      static void
+      parse (std::set<X, C>& c, bool& xs, scanner& s)
+      {
+        X x;
+        bool dummy;
+        parser<X>::parse (x, dummy, s);
+        c.insert (x);
+        xs = true;
+      }
+
+      static void
+      merge (std::set<X, C>& b, const std::set<X, C>& a)
+      {
+        b.insert (a.begin (), a.end ());
+      }
+    };
+
+    template <typename K, typename V, typename C>
+    struct parser<std::map<K, V, C> >
+    {
+      static void
+      parse (std::map<K, V, C>& m, bool& xs, scanner& s)
+      {
+        const char* o (s.next ());
+
+        if (s.more ())
+        {
+          std::size_t pos (s.position ());
+          std::string ov (s.next ());
+          std::string::size_type p = ov.find ('=');
+
+          K k = K ();
+          V v = V ();
+          std::string kstr (ov, 0, p);
+          std::string vstr (ov, (p != std::string::npos ? p + 1 : ov.size ()));
+
+          int ac (2);
+          char* av[] =
+          {
+            const_cast<char*> (o),
+            0
+          };
+
+          bool dummy;
+          if (!kstr.empty ())
+          {
+            av[1] = const_cast<char*> (kstr.c_str ());
+            argv_scanner s (0, ac, av, false, pos);
+            parser<K>::parse (k, dummy, s);
+          }
+
+          if (!vstr.empty ())
+          {
+            av[1] = const_cast<char*> (vstr.c_str ());
+            argv_scanner s (0, ac, av, false, pos);
+            parser<V>::parse (v, dummy, s);
+          }
+
+          m[k] = v;
+        }
+        else
+          throw missing_value (o);
+
+        xs = true;
+      }
+
+      static void
+      merge (std::map<K, V, C>& b, const std::map<K, V, C>& a)
+      {
+        for (typename std::map<K, V, C>::const_iterator i (a.begin ()); 
+             i != a.end (); 
+             ++i)
+          b[i->first] = i->second;
+      }
+    };
+
+    template <typename X, typename T, T X::*M>
+    void
+    thunk (X& x, scanner& s)
+    {
+      parser<T>::parse (x.*M, s);
+    }
+
+    template <typename X, typename T, T X::*M, bool X::*S>
+    void
+    thunk (X& x, scanner& s)
+    {
+      parser<T>::parse (x.*M, x.*S, s);
+    }
+  }
+}
+
+#include <map>
+#include <cstring>
+
+namespace bpkg
+{
+  // commands
+  //
+
+  commands::
+  commands ()
+  : help_ (),
+    cfg_create_ (),
+    cfg_info_ (),
+    cfg_link_ (),
+    cfg_unlink_ (),
+    rep_info_ (),
+    rep_add_ (),
+    rep_remove_ (),
+    rep_list_ (),
+    rep_fetch_ (),
+    rep_create_ (),
+    pkg_status_ (),
+    pkg_build_ (),
+    pkg_drop_ (),
+    pkg_install_ (),
+    pkg_uninstall_ (),
+    pkg_update_ (),
+    pkg_test_ (),
+    pkg_clean_ (),
+    pkg_verify_ (),
+    pkg_fetch_ (),
+    pkg_unpack_ (),
+    pkg_checkout_ (),
+    pkg_configure_ (),
+    pkg_disfigure_ (),
+    pkg_purge_ ()
+  {
+  }
+
+  bool commands::
+  parse (int& argc,
+         char** argv,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  bool commands::
+  parse (int start,
+         int& argc,
+         char** argv,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (start, argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  bool commands::
+  parse (int& argc,
+         char** argv,
+         int& end,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    end = s.end ();
+    return r;
+  }
+
+  bool commands::
+  parse (int start,
+         int& argc,
+         char** argv,
+         int& end,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (start, argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    end = s.end ();
+    return r;
+  }
+
+  bool commands::
+  parse (::bpkg::cli::scanner& s,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  void commands::
+  merge (const commands& a)
+  {
+    CLI_POTENTIALLY_UNUSED (a);
+
+    if (a.help_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->help_, a.help_);
+    }
+
+    if (a.cfg_create_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->cfg_create_, a.cfg_create_);
+    }
+
+    if (a.cfg_info_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->cfg_info_, a.cfg_info_);
+    }
+
+    if (a.cfg_link_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->cfg_link_, a.cfg_link_);
+    }
+
+    if (a.cfg_unlink_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->cfg_unlink_, a.cfg_unlink_);
+    }
+
+    if (a.rep_info_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->rep_info_, a.rep_info_);
+    }
+
+    if (a.rep_add_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->rep_add_, a.rep_add_);
+    }
+
+    if (a.rep_remove_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->rep_remove_, a.rep_remove_);
+    }
+
+    if (a.rep_list_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->rep_list_, a.rep_list_);
+    }
+
+    if (a.rep_fetch_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->rep_fetch_, a.rep_fetch_);
+    }
+
+    if (a.rep_create_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->rep_create_, a.rep_create_);
+    }
+
+    if (a.pkg_status_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->pkg_status_, a.pkg_status_);
+    }
+
+    if (a.pkg_build_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->pkg_build_, a.pkg_build_);
+    }
+
+    if (a.pkg_drop_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->pkg_drop_, a.pkg_drop_);
+    }
+
+    if (a.pkg_install_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->pkg_install_, a.pkg_install_);
+    }
+
+    if (a.pkg_uninstall_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->pkg_uninstall_, a.pkg_uninstall_);
+    }
+
+    if (a.pkg_update_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->pkg_update_, a.pkg_update_);
+    }
+
+    if (a.pkg_test_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->pkg_test_, a.pkg_test_);
+    }
+
+    if (a.pkg_clean_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->pkg_clean_, a.pkg_clean_);
+    }
+
+    if (a.pkg_verify_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->pkg_verify_, a.pkg_verify_);
+    }
+
+    if (a.pkg_fetch_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->pkg_fetch_, a.pkg_fetch_);
+    }
+
+    if (a.pkg_unpack_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->pkg_unpack_, a.pkg_unpack_);
+    }
+
+    if (a.pkg_checkout_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->pkg_checkout_, a.pkg_checkout_);
+    }
+
+    if (a.pkg_configure_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->pkg_configure_, a.pkg_configure_);
+    }
+
+    if (a.pkg_disfigure_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->pkg_disfigure_, a.pkg_disfigure_);
+    }
+
+    if (a.pkg_purge_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->pkg_purge_, a.pkg_purge_);
+    }
+  }
+
+  ::bpkg::cli::usage_para commands::
+  print_usage (::std::ostream& os, ::bpkg::cli::usage_para p)
+  {
+    CLI_POTENTIALLY_UNUSED (os);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mCOMMANDS\033[0m" << ::std::endl;
+
+    os << std::endl
+       << "\033[1mhelp\033[0m [\033[4mtopic\033[0m]             \033[1mbpkg-help(1)\033[0m -- show help for a command or help topic" << ::std::endl;
+
+    os << "\033[1mcfg-create\033[0m|\033[1mcreate\033[0m        \033[1mbpkg-cfg-create(1)\033[0m -- create configuration" << ::std::endl;
+
+    os << "\033[1mcfg-info\033[0m                 \033[1mbpkg-cfg-info(1)\033[0m -- print configuration information" << ::std::endl;
+
+    os << "\033[1mcfg-link\033[0m|\033[1mlink\033[0m            \033[1mbpkg-cfg-link(1)\033[0m -- link configuration" << ::std::endl;
+
+    os << "\033[1mcfg-unlink\033[0m|\033[1munlink\033[0m        \033[1mbpkg-cfg-unlink(1)\033[0m -- unlink configuration" << ::std::endl;
+
+    os << "\033[1mrep-info\033[0m                 \033[1mbpkg-rep-info(1)\033[0m -- print repository information" << ::std::endl;
+
+    os << "\033[1mrep-add\033[0m|\033[1madd\033[0m              \033[1mbpkg-rep-add(1)\033[0m -- add repository to configuration" << ::std::endl;
+
+    os << "\033[1mrep-remove\033[0m|\033[1mremove\033[0m        \033[1mbpkg-rep-remove(1)\033[0m -- remove repository from" << ::std::endl
+       << "                         configuration" << ::std::endl;
+
+    os << "\033[1mrep-list\033[0m|\033[1mlist\033[0m            \033[1mbpkg-rep-list(1)\033[0m -- list repositories in configuration" << ::std::endl;
+
+    os << "\033[1mrep-fetch\033[0m|\033[1mfetch\033[0m          \033[1mbpkg-rep-fetch(1)\033[0m -- fetch list of available packages" << ::std::endl;
+
+    os << "\033[1mrep-create\033[0m               \033[1mbpkg-rep-create(1)\033[0m -- create repository" << ::std::endl;
+
+    os << "\033[1mpkg-status\033[0m|\033[1mstatus\033[0m        \033[1mbpkg-pkg-status(1)\033[0m -- print package status" << ::std::endl;
+
+    os << "\033[1mpkg-build\033[0m|\033[1mbuild\033[0m          \033[1mbpkg-pkg-build(1)\033[0m -- build package" << ::std::endl;
+
+    os << "\033[1mpkg-drop\033[0m|\033[1mdrop\033[0m            \033[1mbpkg-pkg-drop(1)\033[0m -- drop package" << ::std::endl;
+
+    os << "\033[1mpkg-install\033[0m|\033[1minstall\033[0m      \033[1mbpkg-pkg-install(1)\033[0m -- install package" << ::std::endl;
+
+    os << "\033[1mpkg-uninstall\033[0m|\033[1muninstall\033[0m  \033[1mbpkg-pkg-uninstall(1)\033[0m -- uninstall package" << ::std::endl;
+
+    os << "\033[1mpkg-update\033[0m|\033[1mupdate\033[0m        \033[1mbpkg-pkg-update(1)\033[0m -- update package" << ::std::endl;
+
+    os << "\033[1mpkg-test\033[0m|\033[1mtest\033[0m            \033[1mbpkg-pkg-test(1)\033[0m -- test package" << ::std::endl;
+
+    os << "\033[1mpkg-clean\033[0m|\033[1mclean\033[0m          \033[1mbpkg-pkg-clean(1)\033[0m -- clean package" << ::std::endl;
+
+    os << "\033[1mpkg-verify\033[0m               \033[1mbpkg-pkg-verify(1)\033[0m -- verify package archive" << ::std::endl;
+
+    os << "\033[1mpkg-fetch\033[0m                \033[1mbpkg-pkg-fetch(1)\033[0m -- fetch package archive" << ::std::endl;
+
+    os << "\033[1mpkg-unpack\033[0m               \033[1mbpkg-pkg-unpack(1)\033[0m -- unpack package archive" << ::std::endl;
+
+    os << "\033[1mpkg-checkout\033[0m             \033[1mbpkg-pkg-checkout(1)\033[0m -- check out package version" << ::std::endl;
+
+    os << "\033[1mpkg-configure\033[0m            \033[1mbpkg-pkg-configure(1)\033[0m -- configure package" << ::std::endl;
+
+    os << "\033[1mpkg-disfigure\033[0m            \033[1mbpkg-pkg-disfigure(1)\033[0m -- disfigure package" << ::std::endl;
+
+    os << "\033[1mpkg-purge\033[0m                \033[1mbpkg-pkg-purge(1)\033[0m -- purge package" << ::std::endl;
+
+    p = ::bpkg::cli::usage_para::option;
+
+    return p;
+  }
+
+  typedef
+  std::map<std::string, void (*) (commands&, ::bpkg::cli::scanner&)>
+  _cli_commands_map;
+
+  static _cli_commands_map _cli_commands_map_;
+
+  struct _cli_commands_map_init
+  {
+    _cli_commands_map_init ()
+    {
+      _cli_commands_map_["help"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::help_ >;
+      _cli_commands_map_["cfg-create"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::cfg_create_ >;
+      _cli_commands_map_["create"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::cfg_create_ >;
+      _cli_commands_map_["cfg-info"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::cfg_info_ >;
+      _cli_commands_map_["cfg-link"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::cfg_link_ >;
+      _cli_commands_map_["link"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::cfg_link_ >;
+      _cli_commands_map_["cfg-unlink"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::cfg_unlink_ >;
+      _cli_commands_map_["unlink"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::cfg_unlink_ >;
+      _cli_commands_map_["rep-info"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::rep_info_ >;
+      _cli_commands_map_["rep-add"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::rep_add_ >;
+      _cli_commands_map_["add"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::rep_add_ >;
+      _cli_commands_map_["rep-remove"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::rep_remove_ >;
+      _cli_commands_map_["remove"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::rep_remove_ >;
+      _cli_commands_map_["rep-list"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::rep_list_ >;
+      _cli_commands_map_["list"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::rep_list_ >;
+      _cli_commands_map_["rep-fetch"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::rep_fetch_ >;
+      _cli_commands_map_["fetch"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::rep_fetch_ >;
+      _cli_commands_map_["rep-create"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::rep_create_ >;
+      _cli_commands_map_["pkg-status"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::pkg_status_ >;
+      _cli_commands_map_["status"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::pkg_status_ >;
+      _cli_commands_map_["pkg-build"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::pkg_build_ >;
+      _cli_commands_map_["build"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::pkg_build_ >;
+      _cli_commands_map_["pkg-drop"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::pkg_drop_ >;
+      _cli_commands_map_["drop"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::pkg_drop_ >;
+      _cli_commands_map_["pkg-install"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::pkg_install_ >;
+      _cli_commands_map_["install"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::pkg_install_ >;
+      _cli_commands_map_["pkg-uninstall"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::pkg_uninstall_ >;
+      _cli_commands_map_["uninstall"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::pkg_uninstall_ >;
+      _cli_commands_map_["pkg-update"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::pkg_update_ >;
+      _cli_commands_map_["update"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::pkg_update_ >;
+      _cli_commands_map_["pkg-test"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::pkg_test_ >;
+      _cli_commands_map_["test"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::pkg_test_ >;
+      _cli_commands_map_["pkg-clean"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::pkg_clean_ >;
+      _cli_commands_map_["clean"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::pkg_clean_ >;
+      _cli_commands_map_["pkg-verify"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::pkg_verify_ >;
+      _cli_commands_map_["pkg-fetch"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::pkg_fetch_ >;
+      _cli_commands_map_["pkg-unpack"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::pkg_unpack_ >;
+      _cli_commands_map_["pkg-checkout"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::pkg_checkout_ >;
+      _cli_commands_map_["pkg-configure"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::pkg_configure_ >;
+      _cli_commands_map_["pkg-disfigure"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::pkg_disfigure_ >;
+      _cli_commands_map_["pkg-purge"] =
+      &::bpkg::cli::thunk< commands, bool, &commands::pkg_purge_ >;
+    }
+  };
+
+  static _cli_commands_map_init _cli_commands_map_init_;
+
+  bool commands::
+  _parse (const char* o, ::bpkg::cli::scanner& s)
+  {
+    _cli_commands_map::const_iterator i (_cli_commands_map_.find (o));
+
+    if (i != _cli_commands_map_.end ())
+    {
+      (*(i->second)) (*this, s);
+      return true;
+    }
+
+    return false;
+  }
+
+  bool commands::
+  _parse (::bpkg::cli::scanner& s,
+          ::bpkg::cli::unknown_mode opt_mode,
+          ::bpkg::cli::unknown_mode arg_mode)
+  {
+    // Can't skip combined flags (--no-combined-flags).
+    //
+    assert (opt_mode != ::bpkg::cli::unknown_mode::skip);
+
+    bool r = false;
+    bool opt = true;
+
+    while (s.more ())
+    {
+      const char* o = s.peek ();
+
+      if (std::strcmp (o, "--") == 0)
+      {
+        opt = false;
+      }
+
+      if (opt)
+      {
+        if (_parse (o, s))
+        {
+          r = true;
+          continue;
+        }
+
+        if (std::strncmp (o, "-", 1) == 0 && o[1] != '\0')
+        {
+          // Handle combined option values.
+          //
+          std::string co;
+          if (const char* v = std::strchr (o, '='))
+          {
+            co.assign (o, 0, v - o);
+            ++v;
+
+            int ac (2);
+            char* av[] =
+            {
+              const_cast<char*> (co.c_str ()),
+              const_cast<char*> (v)
+            };
+
+            ::bpkg::cli::argv_scanner ns (0, ac, av);
+
+            if (_parse (co.c_str (), ns))
+            {
+              // Parsed the option but not its value?
+              //
+              if (ns.end () != 2)
+                throw ::bpkg::cli::invalid_value (co, v);
+
+              s.next ();
+              r = true;
+              continue;
+            }
+            else
+            {
+              // Set the unknown option and fall through.
+              //
+              o = co.c_str ();
+            }
+          }
+
+          // Handle combined flags.
+          //
+          char cf[3];
+          {
+            const char* p = o + 1;
+            for (; *p != '\0'; ++p)
+            {
+              if (!((*p >= 'a' && *p <= 'z') ||
+                    (*p >= 'A' && *p <= 'Z') ||
+                    (*p >= '0' && *p <= '9')))
+                break;
+            }
+
+            if (*p == '\0')
+            {
+              for (p = o + 1; *p != '\0'; ++p)
+              {
+                std::strcpy (cf, "-");
+                cf[1] = *p;
+                cf[2] = '\0';
+
+                int ac (1);
+                char* av[] =
+                {
+                  cf
+                };
+
+                ::bpkg::cli::argv_scanner ns (0, ac, av);
+
+                if (!_parse (cf, ns))
+                  break;
+              }
+
+              if (*p == '\0')
+              {
+                // All handled.
+                //
+                s.next ();
+                r = true;
+                continue;
+              }
+              else
+              {
+                // Set the unknown option and fall through.
+                //
+                o = cf;
+              }
+            }
+          }
+
+          switch (opt_mode)
+          {
+            case ::bpkg::cli::unknown_mode::skip:
+            {
+              s.skip ();
+              r = true;
+              continue;
+            }
+            case ::bpkg::cli::unknown_mode::stop:
+            {
+              break;
+            }
+            case ::bpkg::cli::unknown_mode::fail:
+            {
+              throw ::bpkg::cli::unknown_option (o);
+            }
+          }
+
+          break;
+        }
+      }
+
+      switch (arg_mode)
+      {
+        case ::bpkg::cli::unknown_mode::skip:
+        {
+          s.skip ();
+          r = true;
+          continue;
+        }
+        case ::bpkg::cli::unknown_mode::stop:
+        {
+          break;
+        }
+        case ::bpkg::cli::unknown_mode::fail:
+        {
+          throw ::bpkg::cli::unknown_argument (o);
+        }
+      }
+
+      break;
+    }
+
+    return r;
+  }
+
+  // topics
+  //
+
+  topics::
+  topics ()
+  : common_options_ (),
+    default_options_files_ (),
+    repository_types_ (),
+    repository_signing_ (),
+    argument_grouping_ ()
+  {
+  }
+
+  bool topics::
+  parse (int& argc,
+         char** argv,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  bool topics::
+  parse (int start,
+         int& argc,
+         char** argv,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (start, argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  bool topics::
+  parse (int& argc,
+         char** argv,
+         int& end,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    end = s.end ();
+    return r;
+  }
+
+  bool topics::
+  parse (int start,
+         int& argc,
+         char** argv,
+         int& end,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (start, argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    end = s.end ();
+    return r;
+  }
+
+  bool topics::
+  parse (::bpkg::cli::scanner& s,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  void topics::
+  merge (const topics& a)
+  {
+    CLI_POTENTIALLY_UNUSED (a);
+
+    if (a.common_options_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->common_options_, a.common_options_);
+    }
+
+    if (a.default_options_files_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->default_options_files_, a.default_options_files_);
+    }
+
+    if (a.repository_types_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->repository_types_, a.repository_types_);
+    }
+
+    if (a.repository_signing_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->repository_signing_, a.repository_signing_);
+    }
+
+    if (a.argument_grouping_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->argument_grouping_, a.argument_grouping_);
+    }
+  }
+
+  ::bpkg::cli::usage_para topics::
+  print_usage (::std::ostream& os, ::bpkg::cli::usage_para p)
+  {
+    CLI_POTENTIALLY_UNUSED (os);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mHELP TOPICS\033[0m" << ::std::endl;
+
+    os << std::endl
+       << "\033[1mcommon-options\033[0m           \033[1mbpkg-common-options(1)\033[0m -- details on common options" << ::std::endl;
+
+    os << "\033[1mdefault-options-files\033[0m    \033[1mbpkg-default-options-files(1)\033[0m -- specifying default" << ::std::endl
+       << "                         options" << ::std::endl;
+
+    os << "\033[1mrepository-types\033[0m         \033[1mbpkg-repository-types(1)\033[0m -- repository types," << ::std::endl
+       << "                         structure, and URLs" << ::std::endl;
+
+    os << "\033[1mrepository-signing\033[0m       \033[1mbpkg-repository-signing(1)\033[0m -- how to sign repository" << ::std::endl;
+
+    os << "\033[1margument-grouping\033[0m        \033[1mbpkg-argument-grouping(1)\033[0m -- argument grouping" << ::std::endl
+       << "                         facility" << ::std::endl;
+
+    p = ::bpkg::cli::usage_para::option;
+
+    return p;
+  }
+
+  typedef
+  std::map<std::string, void (*) (topics&, ::bpkg::cli::scanner&)>
+  _cli_topics_map;
+
+  static _cli_topics_map _cli_topics_map_;
+
+  struct _cli_topics_map_init
+  {
+    _cli_topics_map_init ()
+    {
+      _cli_topics_map_["common-options"] =
+      &::bpkg::cli::thunk< topics, bool, &topics::common_options_ >;
+      _cli_topics_map_["default-options-files"] =
+      &::bpkg::cli::thunk< topics, bool, &topics::default_options_files_ >;
+      _cli_topics_map_["repository-types"] =
+      &::bpkg::cli::thunk< topics, bool, &topics::repository_types_ >;
+      _cli_topics_map_["repository-signing"] =
+      &::bpkg::cli::thunk< topics, bool, &topics::repository_signing_ >;
+      _cli_topics_map_["argument-grouping"] =
+      &::bpkg::cli::thunk< topics, bool, &topics::argument_grouping_ >;
+    }
+  };
+
+  static _cli_topics_map_init _cli_topics_map_init_;
+
+  bool topics::
+  _parse (const char* o, ::bpkg::cli::scanner& s)
+  {
+    _cli_topics_map::const_iterator i (_cli_topics_map_.find (o));
+
+    if (i != _cli_topics_map_.end ())
+    {
+      (*(i->second)) (*this, s);
+      return true;
+    }
+
+    return false;
+  }
+
+  bool topics::
+  _parse (::bpkg::cli::scanner& s,
+          ::bpkg::cli::unknown_mode opt_mode,
+          ::bpkg::cli::unknown_mode arg_mode)
+  {
+    // Can't skip combined flags (--no-combined-flags).
+    //
+    assert (opt_mode != ::bpkg::cli::unknown_mode::skip);
+
+    bool r = false;
+    bool opt = true;
+
+    while (s.more ())
+    {
+      const char* o = s.peek ();
+
+      if (std::strcmp (o, "--") == 0)
+      {
+        opt = false;
+      }
+
+      if (opt)
+      {
+        if (_parse (o, s))
+        {
+          r = true;
+          continue;
+        }
+
+        if (std::strncmp (o, "-", 1) == 0 && o[1] != '\0')
+        {
+          // Handle combined option values.
+          //
+          std::string co;
+          if (const char* v = std::strchr (o, '='))
+          {
+            co.assign (o, 0, v - o);
+            ++v;
+
+            int ac (2);
+            char* av[] =
+            {
+              const_cast<char*> (co.c_str ()),
+              const_cast<char*> (v)
+            };
+
+            ::bpkg::cli::argv_scanner ns (0, ac, av);
+
+            if (_parse (co.c_str (), ns))
+            {
+              // Parsed the option but not its value?
+              //
+              if (ns.end () != 2)
+                throw ::bpkg::cli::invalid_value (co, v);
+
+              s.next ();
+              r = true;
+              continue;
+            }
+            else
+            {
+              // Set the unknown option and fall through.
+              //
+              o = co.c_str ();
+            }
+          }
+
+          // Handle combined flags.
+          //
+          char cf[3];
+          {
+            const char* p = o + 1;
+            for (; *p != '\0'; ++p)
+            {
+              if (!((*p >= 'a' && *p <= 'z') ||
+                    (*p >= 'A' && *p <= 'Z') ||
+                    (*p >= '0' && *p <= '9')))
+                break;
+            }
+
+            if (*p == '\0')
+            {
+              for (p = o + 1; *p != '\0'; ++p)
+              {
+                std::strcpy (cf, "-");
+                cf[1] = *p;
+                cf[2] = '\0';
+
+                int ac (1);
+                char* av[] =
+                {
+                  cf
+                };
+
+                ::bpkg::cli::argv_scanner ns (0, ac, av);
+
+                if (!_parse (cf, ns))
+                  break;
+              }
+
+              if (*p == '\0')
+              {
+                // All handled.
+                //
+                s.next ();
+                r = true;
+                continue;
+              }
+              else
+              {
+                // Set the unknown option and fall through.
+                //
+                o = cf;
+              }
+            }
+          }
+
+          switch (opt_mode)
+          {
+            case ::bpkg::cli::unknown_mode::skip:
+            {
+              s.skip ();
+              r = true;
+              continue;
+            }
+            case ::bpkg::cli::unknown_mode::stop:
+            {
+              break;
+            }
+            case ::bpkg::cli::unknown_mode::fail:
+            {
+              throw ::bpkg::cli::unknown_option (o);
+            }
+          }
+
+          break;
+        }
+      }
+
+      switch (arg_mode)
+      {
+        case ::bpkg::cli::unknown_mode::skip:
+        {
+          s.skip ();
+          r = true;
+          continue;
+        }
+        case ::bpkg::cli::unknown_mode::stop:
+        {
+          break;
+        }
+        case ::bpkg::cli::unknown_mode::fail:
+        {
+          throw ::bpkg::cli::unknown_argument (o);
+        }
+      }
+
+      break;
+    }
+
+    return r;
+  }
+
+  // options
+  //
+
+  options::
+  options ()
+  : help_ (),
+    version_ ()
+  {
+  }
+
+  bool options::
+  parse (int& argc,
+         char** argv,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  bool options::
+  parse (int start,
+         int& argc,
+         char** argv,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (start, argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  bool options::
+  parse (int& argc,
+         char** argv,
+         int& end,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    end = s.end ();
+    return r;
+  }
+
+  bool options::
+  parse (int start,
+         int& argc,
+         char** argv,
+         int& end,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (start, argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    end = s.end ();
+    return r;
+  }
+
+  bool options::
+  parse (::bpkg::cli::scanner& s,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  void options::
+  merge (const options& a)
+  {
+    CLI_POTENTIALLY_UNUSED (a);
+
+    // common_options base
+    //
+    ::bpkg::common_options::merge (a);
+
+    if (a.help_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->help_, a.help_);
+    }
+
+    if (a.version_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->version_, a.version_);
+    }
+  }
+
+  ::bpkg::cli::usage_para options::
+  print_usage (::std::ostream& os, ::bpkg::cli::usage_para p)
+  {
+    CLI_POTENTIALLY_UNUSED (os);
+
+    // common_options base
+    //
+    p = ::bpkg::common_options::print_usage (os, p);
+
+    return p;
+  }
+
+  typedef
+  std::map<std::string, void (*) (options&, ::bpkg::cli::scanner&)>
+  _cli_options_map;
+
+  static _cli_options_map _cli_options_map_;
+
+  struct _cli_options_map_init
+  {
+    _cli_options_map_init ()
+    {
+      _cli_options_map_["--help"] =
+      &::bpkg::cli::thunk< options, bool, &options::help_ >;
+      _cli_options_map_["--version"] =
+      &::bpkg::cli::thunk< options, bool, &options::version_ >;
+    }
+  };
+
+  static _cli_options_map_init _cli_options_map_init_;
+
+  bool options::
+  _parse (const char* o, ::bpkg::cli::scanner& s)
+  {
+    _cli_options_map::const_iterator i (_cli_options_map_.find (o));
+
+    if (i != _cli_options_map_.end ())
+    {
+      (*(i->second)) (*this, s);
+      return true;
+    }
+
+    // common_options base
+    //
+    if (::bpkg::common_options::_parse (o, s))
+      return true;
+
+    return false;
+  }
+
+  bool options::
+  _parse (::bpkg::cli::scanner& s,
+          ::bpkg::cli::unknown_mode opt_mode,
+          ::bpkg::cli::unknown_mode arg_mode)
+  {
+    // Can't skip combined flags (--no-combined-flags).
+    //
+    assert (opt_mode != ::bpkg::cli::unknown_mode::skip);
+
+    bool r = false;
+    bool opt = true;
+
+    while (s.more ())
+    {
+      const char* o = s.peek ();
+
+      if (std::strcmp (o, "--") == 0)
+      {
+        opt = false;
+      }
+
+      if (opt)
+      {
+        if (_parse (o, s))
+        {
+          r = true;
+          continue;
+        }
+
+        if (std::strncmp (o, "-", 1) == 0 && o[1] != '\0')
+        {
+          // Handle combined option values.
+          //
+          std::string co;
+          if (const char* v = std::strchr (o, '='))
+          {
+            co.assign (o, 0, v - o);
+            ++v;
+
+            int ac (2);
+            char* av[] =
+            {
+              const_cast<char*> (co.c_str ()),
+              const_cast<char*> (v)
+            };
+
+            ::bpkg::cli::argv_scanner ns (0, ac, av);
+
+            if (_parse (co.c_str (), ns))
+            {
+              // Parsed the option but not its value?
+              //
+              if (ns.end () != 2)
+                throw ::bpkg::cli::invalid_value (co, v);
+
+              s.next ();
+              r = true;
+              continue;
+            }
+            else
+            {
+              // Set the unknown option and fall through.
+              //
+              o = co.c_str ();
+            }
+          }
+
+          // Handle combined flags.
+          //
+          char cf[3];
+          {
+            const char* p = o + 1;
+            for (; *p != '\0'; ++p)
+            {
+              if (!((*p >= 'a' && *p <= 'z') ||
+                    (*p >= 'A' && *p <= 'Z') ||
+                    (*p >= '0' && *p <= '9')))
+                break;
+            }
+
+            if (*p == '\0')
+            {
+              for (p = o + 1; *p != '\0'; ++p)
+              {
+                std::strcpy (cf, "-");
+                cf[1] = *p;
+                cf[2] = '\0';
+
+                int ac (1);
+                char* av[] =
+                {
+                  cf
+                };
+
+                ::bpkg::cli::argv_scanner ns (0, ac, av);
+
+                if (!_parse (cf, ns))
+                  break;
+              }
+
+              if (*p == '\0')
+              {
+                // All handled.
+                //
+                s.next ();
+                r = true;
+                continue;
+              }
+              else
+              {
+                // Set the unknown option and fall through.
+                //
+                o = cf;
+              }
+            }
+          }
+
+          switch (opt_mode)
+          {
+            case ::bpkg::cli::unknown_mode::skip:
+            {
+              s.skip ();
+              r = true;
+              continue;
+            }
+            case ::bpkg::cli::unknown_mode::stop:
+            {
+              break;
+            }
+            case ::bpkg::cli::unknown_mode::fail:
+            {
+              throw ::bpkg::cli::unknown_option (o);
+            }
+          }
+
+          break;
+        }
+      }
+
+      switch (arg_mode)
+      {
+        case ::bpkg::cli::unknown_mode::skip:
+        {
+          s.skip ();
+          r = true;
+          continue;
+        }
+        case ::bpkg::cli::unknown_mode::stop:
+        {
+          break;
+        }
+        case ::bpkg::cli::unknown_mode::fail:
+        {
+          throw ::bpkg::cli::unknown_argument (o);
+        }
+      }
+
+      break;
+    }
+
+    return r;
+  }
+}
+
+namespace bpkg
+{
+  ::bpkg::cli::usage_para
+  print_bpkg_usage (::std::ostream& os, ::bpkg::cli::usage_para p)
+  {
+    CLI_POTENTIALLY_UNUSED (os);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mSYNOPSIS\033[0m" << ::std::endl
+       << ::std::endl
+       << "\033[1mbpkg --help\033[0m" << ::std::endl
+       << "\033[1mbpkg --version\033[0m" << ::std::endl
+       << "\033[1mbpkg help\033[0m [\033[4mcommand\033[0m | \033[4mtopic\033[0m]" << ::std::endl
+       << "\033[1mbpkg\033[0m [\033[4mcommon-options\033[0m] \033[4mcommand\033[0m [\033[4mcommand-options\033[0m] \033[4mcommand-args\033[0m\033[0m" << ::std::endl
+       << ::std::endl
+       << "\033[1mDESCRIPTION\033[0m" << ::std::endl
+       << ::std::endl
+       << "The \033[1mbuild2\033[0m package dependency manager is used to manipulate build" << ::std::endl
+       << "configurations, packages, and repositories using a set of commands that are" << ::std::endl
+       << "summarized below." << ::std::endl
+       << ::std::endl
+       << "For a detailed description of any command or help topic, use the \033[1mhelp\033[0m command" << ::std::endl
+       << "or see the corresponding man page (the man pages have the \033[1mbpkg-\033[0m prefix, for" << ::std::endl
+       << "example \033[1mbpkg-help(1)\033[0m). Note also that \033[4mcommand-options\033[0m and \033[4mcommand-args\033[0m can be" << ::std::endl
+       << "specified in any order and \033[4mcommon-options\033[0m can be specified as part of" << ::std::endl
+       << "\033[4mcommand-options\033[0m." << ::std::endl;
+
+    p = ::bpkg::commands::print_usage (os, ::bpkg::cli::usage_para::text);
+
+    p = ::bpkg::topics::print_usage (os, p);
+
+    p = ::bpkg::options::print_usage (os, p);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mENVIRONMENT\033[0m" << ::std::endl
+       << ::std::endl
+       << "Commands executed by \033[1mbpkg\033[0m while the current and linked build configuration" << ::std::endl
+       << "databases are open will have the \033[1mBPKG_OPEN_CONFIGS\033[0m environment variable set to" << ::std::endl
+       << "the space-separated, \033[1m\"\033[0m-quoted list of absolute and normalized configuration" << ::std::endl
+       << "directory paths. This can be used by build system hooks and/or programs that" << ::std::endl
+       << "they execute." << ::std::endl;
+
+    os << std::endl
+       << "\033[1mEXIT STATUS\033[0m" << ::std::endl
+       << ::std::endl
+       << "\033[1m0\033[0m" << ::std::endl
+       << "    Success." << ::std::endl
+       << "\033[1m1\033[0m" << ::std::endl
+       << "    Fatal error." << ::std::endl
+       << "\033[1m2\033[0m" << ::std::endl
+       << "    Recoverable error which is likely to disappear if the command is" << ::std::endl
+       << "    re-executed." << ::std::endl
+       << ::std::endl
+       << "\033[1mENVIRONMENT\033[0m" << ::std::endl
+       << ::std::endl
+       << "The \033[1mBPKG_DEF_OPT\033[0m environment variable is used to suppress loading of default" << ::std::endl
+       << "options files in nested \033[1mbpkg\033[0m invocations. Its values are \033[1mfalse\033[0m or \033[1m0\033[0m to suppress" << ::std::endl
+       << "and \033[1mtrue\033[0m or \033[1m1\033[0m to load." << ::std::endl;
+
+    p = ::bpkg::cli::usage_para::text;
+
+    return p;
+  }
+}
+
+// Begin epilogue.
+//
+//
+// End epilogue.
+
diff --git a/bpkg/bpkg-options.hxx b/bpkg/bpkg-options.hxx
new file mode 100644
index 0000000..08a875b
--- /dev/null
+++ b/bpkg/bpkg-options.hxx
@@ -0,0 +1,387 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+#ifndef BPKG_BPKG_OPTIONS_HXX
+#define BPKG_BPKG_OPTIONS_HXX
+
+// Begin prologue.
+//
+//
+// End prologue.
+
+#include <bpkg/common-options.hxx>
+
+namespace bpkg
+{
+  class commands
+  {
+    public:
+    commands ();
+
+    // Return true if anything has been parsed.
+    //
+    bool
+    parse (int& argc,
+           char** argv,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int start,
+           int& argc,
+           char** argv,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int& argc,
+           char** argv,
+           int& end,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int start,
+           int& argc,
+           char** argv,
+           int& end,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (::bpkg::cli::scanner&,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    // Merge options from the specified instance appending/overriding
+    // them as if they appeared after options in this instance.
+    //
+    void
+    merge (const commands&);
+
+    // Option accessors.
+    //
+    const bool&
+    help () const;
+
+    const bool&
+    cfg_create () const;
+
+    const bool&
+    cfg_info () const;
+
+    const bool&
+    cfg_link () const;
+
+    const bool&
+    cfg_unlink () const;
+
+    const bool&
+    rep_info () const;
+
+    const bool&
+    rep_add () const;
+
+    const bool&
+    rep_remove () const;
+
+    const bool&
+    rep_list () const;
+
+    const bool&
+    rep_fetch () const;
+
+    const bool&
+    rep_create () const;
+
+    const bool&
+    pkg_status () const;
+
+    const bool&
+    pkg_build () const;
+
+    const bool&
+    pkg_drop () const;
+
+    const bool&
+    pkg_install () const;
+
+    const bool&
+    pkg_uninstall () const;
+
+    const bool&
+    pkg_update () const;
+
+    const bool&
+    pkg_test () const;
+
+    const bool&
+    pkg_clean () const;
+
+    const bool&
+    pkg_verify () const;
+
+    const bool&
+    pkg_fetch () const;
+
+    const bool&
+    pkg_unpack () const;
+
+    const bool&
+    pkg_checkout () const;
+
+    const bool&
+    pkg_configure () const;
+
+    const bool&
+    pkg_disfigure () const;
+
+    const bool&
+    pkg_purge () const;
+
+    // Print usage information.
+    //
+    static ::bpkg::cli::usage_para
+    print_usage (::std::ostream&,
+                 ::bpkg::cli::usage_para = ::bpkg::cli::usage_para::none);
+
+    // Implementation details.
+    //
+    protected:
+    bool
+    _parse (const char*, ::bpkg::cli::scanner&);
+
+    private:
+    bool
+    _parse (::bpkg::cli::scanner&,
+            ::bpkg::cli::unknown_mode option,
+            ::bpkg::cli::unknown_mode argument);
+
+    public:
+    bool help_;
+    bool cfg_create_;
+    bool cfg_info_;
+    bool cfg_link_;
+    bool cfg_unlink_;
+    bool rep_info_;
+    bool rep_add_;
+    bool rep_remove_;
+    bool rep_list_;
+    bool rep_fetch_;
+    bool rep_create_;
+    bool pkg_status_;
+    bool pkg_build_;
+    bool pkg_drop_;
+    bool pkg_install_;
+    bool pkg_uninstall_;
+    bool pkg_update_;
+    bool pkg_test_;
+    bool pkg_clean_;
+    bool pkg_verify_;
+    bool pkg_fetch_;
+    bool pkg_unpack_;
+    bool pkg_checkout_;
+    bool pkg_configure_;
+    bool pkg_disfigure_;
+    bool pkg_purge_;
+  };
+
+  class topics
+  {
+    public:
+    topics ();
+
+    // Return true if anything has been parsed.
+    //
+    bool
+    parse (int& argc,
+           char** argv,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int start,
+           int& argc,
+           char** argv,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int& argc,
+           char** argv,
+           int& end,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int start,
+           int& argc,
+           char** argv,
+           int& end,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (::bpkg::cli::scanner&,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    // Merge options from the specified instance appending/overriding
+    // them as if they appeared after options in this instance.
+    //
+    void
+    merge (const topics&);
+
+    // Option accessors.
+    //
+    const bool&
+    common_options () const;
+
+    const bool&
+    default_options_files () const;
+
+    const bool&
+    repository_types () const;
+
+    const bool&
+    repository_signing () const;
+
+    const bool&
+    argument_grouping () const;
+
+    // Print usage information.
+    //
+    static ::bpkg::cli::usage_para
+    print_usage (::std::ostream&,
+                 ::bpkg::cli::usage_para = ::bpkg::cli::usage_para::none);
+
+    // Implementation details.
+    //
+    protected:
+    bool
+    _parse (const char*, ::bpkg::cli::scanner&);
+
+    private:
+    bool
+    _parse (::bpkg::cli::scanner&,
+            ::bpkg::cli::unknown_mode option,
+            ::bpkg::cli::unknown_mode argument);
+
+    public:
+    bool common_options_;
+    bool default_options_files_;
+    bool repository_types_;
+    bool repository_signing_;
+    bool argument_grouping_;
+  };
+
+  class options: public ::bpkg::common_options
+  {
+    public:
+    options ();
+
+    // Return true if anything has been parsed.
+    //
+    bool
+    parse (int& argc,
+           char** argv,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int start,
+           int& argc,
+           char** argv,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int& argc,
+           char** argv,
+           int& end,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int start,
+           int& argc,
+           char** argv,
+           int& end,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (::bpkg::cli::scanner&,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    // Merge options from the specified instance appending/overriding
+    // them as if they appeared after options in this instance.
+    //
+    void
+    merge (const options&);
+
+    // Option accessors.
+    //
+    const bool&
+    help () const;
+
+    const bool&
+    version () const;
+
+    // Print usage information.
+    //
+    static ::bpkg::cli::usage_para
+    print_usage (::std::ostream&,
+                 ::bpkg::cli::usage_para = ::bpkg::cli::usage_para::none);
+
+    // Implementation details.
+    //
+    protected:
+    bool
+    _parse (const char*, ::bpkg::cli::scanner&);
+
+    private:
+    bool
+    _parse (::bpkg::cli::scanner&,
+            ::bpkg::cli::unknown_mode option,
+            ::bpkg::cli::unknown_mode argument);
+
+    public:
+    bool help_;
+    bool version_;
+  };
+}
+
+// Print page usage information.
+//
+namespace bpkg
+{
+  ::bpkg::cli::usage_para
+  print_bpkg_usage (::std::ostream&,
+                    ::bpkg::cli::usage_para = ::bpkg::cli::usage_para::none);
+}
+
+#include <bpkg/bpkg-options.ixx>
+
+// Begin epilogue.
+//
+//
+// End epilogue.
+
+#endif // BPKG_BPKG_OPTIONS_HXX
diff --git a/bpkg/bpkg-options.ixx b/bpkg/bpkg-options.ixx
new file mode 100644
index 0000000..6a2ef7e
--- /dev/null
+++ b/bpkg/bpkg-options.ixx
@@ -0,0 +1,225 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+// Begin prologue.
+//
+//
+// End prologue.
+
+namespace bpkg
+{
+  // commands
+  //
+
+  inline const bool& commands::
+  help () const
+  {
+    return this->help_;
+  }
+
+  inline const bool& commands::
+  cfg_create () const
+  {
+    return this->cfg_create_;
+  }
+
+  inline const bool& commands::
+  cfg_info () const
+  {
+    return this->cfg_info_;
+  }
+
+  inline const bool& commands::
+  cfg_link () const
+  {
+    return this->cfg_link_;
+  }
+
+  inline const bool& commands::
+  cfg_unlink () const
+  {
+    return this->cfg_unlink_;
+  }
+
+  inline const bool& commands::
+  rep_info () const
+  {
+    return this->rep_info_;
+  }
+
+  inline const bool& commands::
+  rep_add () const
+  {
+    return this->rep_add_;
+  }
+
+  inline const bool& commands::
+  rep_remove () const
+  {
+    return this->rep_remove_;
+  }
+
+  inline const bool& commands::
+  rep_list () const
+  {
+    return this->rep_list_;
+  }
+
+  inline const bool& commands::
+  rep_fetch () const
+  {
+    return this->rep_fetch_;
+  }
+
+  inline const bool& commands::
+  rep_create () const
+  {
+    return this->rep_create_;
+  }
+
+  inline const bool& commands::
+  pkg_status () const
+  {
+    return this->pkg_status_;
+  }
+
+  inline const bool& commands::
+  pkg_build () const
+  {
+    return this->pkg_build_;
+  }
+
+  inline const bool& commands::
+  pkg_drop () const
+  {
+    return this->pkg_drop_;
+  }
+
+  inline const bool& commands::
+  pkg_install () const
+  {
+    return this->pkg_install_;
+  }
+
+  inline const bool& commands::
+  pkg_uninstall () const
+  {
+    return this->pkg_uninstall_;
+  }
+
+  inline const bool& commands::
+  pkg_update () const
+  {
+    return this->pkg_update_;
+  }
+
+  inline const bool& commands::
+  pkg_test () const
+  {
+    return this->pkg_test_;
+  }
+
+  inline const bool& commands::
+  pkg_clean () const
+  {
+    return this->pkg_clean_;
+  }
+
+  inline const bool& commands::
+  pkg_verify () const
+  {
+    return this->pkg_verify_;
+  }
+
+  inline const bool& commands::
+  pkg_fetch () const
+  {
+    return this->pkg_fetch_;
+  }
+
+  inline const bool& commands::
+  pkg_unpack () const
+  {
+    return this->pkg_unpack_;
+  }
+
+  inline const bool& commands::
+  pkg_checkout () const
+  {
+    return this->pkg_checkout_;
+  }
+
+  inline const bool& commands::
+  pkg_configure () const
+  {
+    return this->pkg_configure_;
+  }
+
+  inline const bool& commands::
+  pkg_disfigure () const
+  {
+    return this->pkg_disfigure_;
+  }
+
+  inline const bool& commands::
+  pkg_purge () const
+  {
+    return this->pkg_purge_;
+  }
+
+  // topics
+  //
+
+  inline const bool& topics::
+  common_options () const
+  {
+    return this->common_options_;
+  }
+
+  inline const bool& topics::
+  default_options_files () const
+  {
+    return this->default_options_files_;
+  }
+
+  inline const bool& topics::
+  repository_types () const
+  {
+    return this->repository_types_;
+  }
+
+  inline const bool& topics::
+  repository_signing () const
+  {
+    return this->repository_signing_;
+  }
+
+  inline const bool& topics::
+  argument_grouping () const
+  {
+    return this->argument_grouping_;
+  }
+
+  // options
+  //
+
+  inline const bool& options::
+  help () const
+  {
+    return this->help_;
+  }
+
+  inline const bool& options::
+  version () const
+  {
+    return this->version_;
+  }
+}
+
+// Begin epilogue.
+//
+//
+// End epilogue.
diff --git a/bpkg/cfg-create-options.cxx b/bpkg/cfg-create-options.cxx
new file mode 100644
index 0000000..238bdfd
--- /dev/null
+++ b/bpkg/cfg-create-options.cxx
@@ -0,0 +1,794 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+// Begin prologue.
+//
+#include <bpkg/types-parsers.hxx>
+//
+// End prologue.
+
+#include <bpkg/cfg-create-options.hxx>
+
+#include <map>
+#include <set>
+#include <string>
+#include <vector>
+#include <utility>
+#include <ostream>
+#include <sstream>
+
+namespace bpkg
+{
+  namespace cli
+  {
+    template <typename X>
+    struct parser
+    {
+      static void
+      parse (X& x, bool& xs, scanner& s)
+      {
+        using namespace std;
+
+        const char* o (s.next ());
+        if (s.more ())
+        {
+          string v (s.next ());
+          istringstream is (v);
+          if (!(is >> x && is.peek () == istringstream::traits_type::eof ()))
+            throw invalid_value (o, v);
+        }
+        else
+          throw missing_value (o);
+
+        xs = true;
+      }
+
+      static void
+      merge (X& b, const X& a)
+      {
+        b = a;
+      }
+    };
+
+    template <>
+    struct parser<bool>
+    {
+      static void
+      parse (bool& x, scanner& s)
+      {
+        s.next ();
+        x = true;
+      }
+
+      static void
+      merge (bool& b, const bool&)
+      {
+        b = true;
+      }
+    };
+
+    template <>
+    struct parser<std::string>
+    {
+      static void
+      parse (std::string& x, bool& xs, scanner& s)
+      {
+        const char* o (s.next ());
+
+        if (s.more ())
+          x = s.next ();
+        else
+          throw missing_value (o);
+
+        xs = true;
+      }
+
+      static void
+      merge (std::string& b, const std::string& a)
+      {
+        b = a;
+      }
+    };
+
+    template <typename X>
+    struct parser<std::pair<X, std::size_t> >
+    {
+      static void
+      parse (std::pair<X, std::size_t>& x, bool& xs, scanner& s)
+      {
+        x.second = s.position ();
+        parser<X>::parse (x.first, xs, s);
+      }
+
+      static void
+      merge (std::pair<X, std::size_t>& b, const std::pair<X, std::size_t>& a)
+      {
+        b = a;
+      }
+    };
+
+    template <typename X>
+    struct parser<std::vector<X> >
+    {
+      static void
+      parse (std::vector<X>& c, bool& xs, scanner& s)
+      {
+        X x;
+        bool dummy;
+        parser<X>::parse (x, dummy, s);
+        c.push_back (x);
+        xs = true;
+      }
+
+      static void
+      merge (std::vector<X>& b, const std::vector<X>& a)
+      {
+        b.insert (b.end (), a.begin (), a.end ());
+      }
+    };
+
+    template <typename X, typename C>
+    struct parser<std::set<X, C> >
+    {
+      static void
+      parse (std::set<X, C>& c, bool& xs, scanner& s)
+      {
+        X x;
+        bool dummy;
+        parser<X>::parse (x, dummy, s);
+        c.insert (x);
+        xs = true;
+      }
+
+      static void
+      merge (std::set<X, C>& b, const std::set<X, C>& a)
+      {
+        b.insert (a.begin (), a.end ());
+      }
+    };
+
+    template <typename K, typename V, typename C>
+    struct parser<std::map<K, V, C> >
+    {
+      static void
+      parse (std::map<K, V, C>& m, bool& xs, scanner& s)
+      {
+        const char* o (s.next ());
+
+        if (s.more ())
+        {
+          std::size_t pos (s.position ());
+          std::string ov (s.next ());
+          std::string::size_type p = ov.find ('=');
+
+          K k = K ();
+          V v = V ();
+          std::string kstr (ov, 0, p);
+          std::string vstr (ov, (p != std::string::npos ? p + 1 : ov.size ()));
+
+          int ac (2);
+          char* av[] =
+          {
+            const_cast<char*> (o),
+            0
+          };
+
+          bool dummy;
+          if (!kstr.empty ())
+          {
+            av[1] = const_cast<char*> (kstr.c_str ());
+            argv_scanner s (0, ac, av, false, pos);
+            parser<K>::parse (k, dummy, s);
+          }
+
+          if (!vstr.empty ())
+          {
+            av[1] = const_cast<char*> (vstr.c_str ());
+            argv_scanner s (0, ac, av, false, pos);
+            parser<V>::parse (v, dummy, s);
+          }
+
+          m[k] = v;
+        }
+        else
+          throw missing_value (o);
+
+        xs = true;
+      }
+
+      static void
+      merge (std::map<K, V, C>& b, const std::map<K, V, C>& a)
+      {
+        for (typename std::map<K, V, C>::const_iterator i (a.begin ()); 
+             i != a.end (); 
+             ++i)
+          b[i->first] = i->second;
+      }
+    };
+
+    template <typename X, typename T, T X::*M>
+    void
+    thunk (X& x, scanner& s)
+    {
+      parser<T>::parse (x.*M, s);
+    }
+
+    template <typename X, typename T, T X::*M, bool X::*S>
+    void
+    thunk (X& x, scanner& s)
+    {
+      parser<T>::parse (x.*M, x.*S, s);
+    }
+  }
+}
+
+#include <map>
+#include <cstring>
+
+namespace bpkg
+{
+  // cfg_create_options
+  //
+
+  cfg_create_options::
+  cfg_create_options ()
+  : directory_ ("."),
+    directory_specified_ (false),
+    existing_ (),
+    wipe_ (),
+    host_config_ (),
+    host_config_specified_ (false),
+    no_host_config_ (),
+    build2_config_ (),
+    build2_config_specified_ (false),
+    no_build2_config_ (),
+    name_ (),
+    name_specified_ (false),
+    type_ ("target"),
+    type_specified_ (false),
+    uuid_ (),
+    uuid_specified_ (false)
+  {
+  }
+
+  bool cfg_create_options::
+  parse (int& argc,
+         char** argv,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  bool cfg_create_options::
+  parse (int start,
+         int& argc,
+         char** argv,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (start, argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  bool cfg_create_options::
+  parse (int& argc,
+         char** argv,
+         int& end,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    end = s.end ();
+    return r;
+  }
+
+  bool cfg_create_options::
+  parse (int start,
+         int& argc,
+         char** argv,
+         int& end,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (start, argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    end = s.end ();
+    return r;
+  }
+
+  bool cfg_create_options::
+  parse (::bpkg::cli::scanner& s,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  void cfg_create_options::
+  merge (const cfg_create_options& a)
+  {
+    CLI_POTENTIALLY_UNUSED (a);
+
+    // common_options base
+    //
+    ::bpkg::common_options::merge (a);
+
+    if (a.directory_specified_)
+    {
+      ::bpkg::cli::parser< dir_path>::merge (
+        this->directory_, a.directory_);
+      this->directory_specified_ = true;
+    }
+
+    if (a.existing_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->existing_, a.existing_);
+    }
+
+    if (a.wipe_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->wipe_, a.wipe_);
+    }
+
+    if (a.host_config_specified_)
+    {
+      ::bpkg::cli::parser< dir_path>::merge (
+        this->host_config_, a.host_config_);
+      this->host_config_specified_ = true;
+    }
+
+    if (a.no_host_config_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->no_host_config_, a.no_host_config_);
+    }
+
+    if (a.build2_config_specified_)
+    {
+      ::bpkg::cli::parser< dir_path>::merge (
+        this->build2_config_, a.build2_config_);
+      this->build2_config_specified_ = true;
+    }
+
+    if (a.no_build2_config_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->no_build2_config_, a.no_build2_config_);
+    }
+
+    if (a.name_specified_)
+    {
+      ::bpkg::cli::parser< string>::merge (
+        this->name_, a.name_);
+      this->name_specified_ = true;
+    }
+
+    if (a.type_specified_)
+    {
+      ::bpkg::cli::parser< string>::merge (
+        this->type_, a.type_);
+      this->type_specified_ = true;
+    }
+
+    if (a.uuid_specified_)
+    {
+      ::bpkg::cli::parser< uuid_type>::merge (
+        this->uuid_, a.uuid_);
+      this->uuid_specified_ = true;
+    }
+  }
+
+  ::bpkg::cli::usage_para cfg_create_options::
+  print_usage (::std::ostream& os, ::bpkg::cli::usage_para p)
+  {
+    CLI_POTENTIALLY_UNUSED (os);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mCFG-CREATE OPTIONS\033[0m" << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--directory\033[0m|\033[1m-d\033[0m \033[4mdir\033[0m       Create the configuration in \033[4mdir\033[0m rather than in the" << ::std::endl
+       << "                         current working directory." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--existing\033[0m|\033[1m-e\033[0m            Initialize a \033[1mbpkg\033[0m configuration based on an existing" << ::std::endl
+       << "                         build system configuration." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--wipe\033[0m                   Wipe the configuration directory clean before creating" << ::std::endl
+       << "                         the new configuration. For safety, this option" << ::std::endl
+       << "                         requires that you specify the configuration directory" << ::std::endl
+       << "                         explicitly with \033[1m--directory|-d\033[0m." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--host-config\033[0m \033[4mdir\033[0m        Link the specified host configuration with the" << ::std::endl
+       << "                         configuration being created as if by running the" << ::std::endl
+       << "                         \033[1mbpkg-cfg-link(1)\033[0m command." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--no-host-config\033[0m         Ignore any specified \033[1m--host-config\033[0m options." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--build2-config\033[0m \033[4mdir\033[0m      Link the specified build system module configuration" << ::std::endl
+       << "                         with the configuration being created as if by running" << ::std::endl
+       << "                         the \033[1mbpkg-cfg-link(1)\033[0m command." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--no-build2-config\033[0m       Ignore any specified \033[1m--build2-config\033[0m options." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--name\033[0m \033[4mname\033[0m              The name of the configuration being created. If this" << ::std::endl
+       << "                         configuration is linked with another configuration" << ::std::endl
+       << "                         using \033[1mbpkg-cfg-link(1)\033[0m, this name will be used as the" << ::std::endl
+       << "                         link name unless overridden. By default the" << ::std::endl
+       << "                         configuration is created unnamed." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--type\033[0m \033[4mtype\033[0m              The type of the configuration being created. By" << ::std::endl
+       << "                         default, configuration of type \033[1mtarget\033[0m is created." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--uuid\033[0m \033[4muuid\033[0m              Use the specified UUID as the configuration id instead" << ::std::endl
+       << "                         of generating one automatically." << ::std::endl;
+
+    p = ::bpkg::cli::usage_para::option;
+
+    // common_options base
+    //
+    p = ::bpkg::common_options::print_usage (os, p);
+
+    return p;
+  }
+
+  typedef
+  std::map<std::string, void (*) (cfg_create_options&, ::bpkg::cli::scanner&)>
+  _cli_cfg_create_options_map;
+
+  static _cli_cfg_create_options_map _cli_cfg_create_options_map_;
+
+  struct _cli_cfg_create_options_map_init
+  {
+    _cli_cfg_create_options_map_init ()
+    {
+      _cli_cfg_create_options_map_["--directory"] =
+      &::bpkg::cli::thunk< cfg_create_options, dir_path, &cfg_create_options::directory_,
+        &cfg_create_options::directory_specified_ >;
+      _cli_cfg_create_options_map_["-d"] =
+      &::bpkg::cli::thunk< cfg_create_options, dir_path, &cfg_create_options::directory_,
+        &cfg_create_options::directory_specified_ >;
+      _cli_cfg_create_options_map_["--existing"] =
+      &::bpkg::cli::thunk< cfg_create_options, bool, &cfg_create_options::existing_ >;
+      _cli_cfg_create_options_map_["-e"] =
+      &::bpkg::cli::thunk< cfg_create_options, bool, &cfg_create_options::existing_ >;
+      _cli_cfg_create_options_map_["--wipe"] =
+      &::bpkg::cli::thunk< cfg_create_options, bool, &cfg_create_options::wipe_ >;
+      _cli_cfg_create_options_map_["--host-config"] =
+      &::bpkg::cli::thunk< cfg_create_options, dir_path, &cfg_create_options::host_config_,
+        &cfg_create_options::host_config_specified_ >;
+      _cli_cfg_create_options_map_["--no-host-config"] =
+      &::bpkg::cli::thunk< cfg_create_options, bool, &cfg_create_options::no_host_config_ >;
+      _cli_cfg_create_options_map_["--build2-config"] =
+      &::bpkg::cli::thunk< cfg_create_options, dir_path, &cfg_create_options::build2_config_,
+        &cfg_create_options::build2_config_specified_ >;
+      _cli_cfg_create_options_map_["--no-build2-config"] =
+      &::bpkg::cli::thunk< cfg_create_options, bool, &cfg_create_options::no_build2_config_ >;
+      _cli_cfg_create_options_map_["--name"] =
+      &::bpkg::cli::thunk< cfg_create_options, string, &cfg_create_options::name_,
+        &cfg_create_options::name_specified_ >;
+      _cli_cfg_create_options_map_["--type"] =
+      &::bpkg::cli::thunk< cfg_create_options, string, &cfg_create_options::type_,
+        &cfg_create_options::type_specified_ >;
+      _cli_cfg_create_options_map_["--uuid"] =
+      &::bpkg::cli::thunk< cfg_create_options, uuid_type, &cfg_create_options::uuid_,
+        &cfg_create_options::uuid_specified_ >;
+    }
+  };
+
+  static _cli_cfg_create_options_map_init _cli_cfg_create_options_map_init_;
+
+  bool cfg_create_options::
+  _parse (const char* o, ::bpkg::cli::scanner& s)
+  {
+    _cli_cfg_create_options_map::const_iterator i (_cli_cfg_create_options_map_.find (o));
+
+    if (i != _cli_cfg_create_options_map_.end ())
+    {
+      (*(i->second)) (*this, s);
+      return true;
+    }
+
+    // common_options base
+    //
+    if (::bpkg::common_options::_parse (o, s))
+      return true;
+
+    return false;
+  }
+
+  bool cfg_create_options::
+  _parse (::bpkg::cli::scanner& s,
+          ::bpkg::cli::unknown_mode opt_mode,
+          ::bpkg::cli::unknown_mode arg_mode)
+  {
+    // Can't skip combined flags (--no-combined-flags).
+    //
+    assert (opt_mode != ::bpkg::cli::unknown_mode::skip);
+
+    bool r = false;
+    bool opt = true;
+
+    while (s.more ())
+    {
+      const char* o = s.peek ();
+
+      if (std::strcmp (o, "--") == 0)
+      {
+        opt = false;
+      }
+
+      if (opt)
+      {
+        if (_parse (o, s))
+        {
+          r = true;
+          continue;
+        }
+
+        if (std::strncmp (o, "-", 1) == 0 && o[1] != '\0')
+        {
+          // Handle combined option values.
+          //
+          std::string co;
+          if (const char* v = std::strchr (o, '='))
+          {
+            co.assign (o, 0, v - o);
+            ++v;
+
+            int ac (2);
+            char* av[] =
+            {
+              const_cast<char*> (co.c_str ()),
+              const_cast<char*> (v)
+            };
+
+            ::bpkg::cli::argv_scanner ns (0, ac, av);
+
+            if (_parse (co.c_str (), ns))
+            {
+              // Parsed the option but not its value?
+              //
+              if (ns.end () != 2)
+                throw ::bpkg::cli::invalid_value (co, v);
+
+              s.next ();
+              r = true;
+              continue;
+            }
+            else
+            {
+              // Set the unknown option and fall through.
+              //
+              o = co.c_str ();
+            }
+          }
+
+          // Handle combined flags.
+          //
+          char cf[3];
+          {
+            const char* p = o + 1;
+            for (; *p != '\0'; ++p)
+            {
+              if (!((*p >= 'a' && *p <= 'z') ||
+                    (*p >= 'A' && *p <= 'Z') ||
+                    (*p >= '0' && *p <= '9')))
+                break;
+            }
+
+            if (*p == '\0')
+            {
+              for (p = o + 1; *p != '\0'; ++p)
+              {
+                std::strcpy (cf, "-");
+                cf[1] = *p;
+                cf[2] = '\0';
+
+                int ac (1);
+                char* av[] =
+                {
+                  cf
+                };
+
+                ::bpkg::cli::argv_scanner ns (0, ac, av);
+
+                if (!_parse (cf, ns))
+                  break;
+              }
+
+              if (*p == '\0')
+              {
+                // All handled.
+                //
+                s.next ();
+                r = true;
+                continue;
+              }
+              else
+              {
+                // Set the unknown option and fall through.
+                //
+                o = cf;
+              }
+            }
+          }
+
+          switch (opt_mode)
+          {
+            case ::bpkg::cli::unknown_mode::skip:
+            {
+              s.skip ();
+              r = true;
+              continue;
+            }
+            case ::bpkg::cli::unknown_mode::stop:
+            {
+              break;
+            }
+            case ::bpkg::cli::unknown_mode::fail:
+            {
+              throw ::bpkg::cli::unknown_option (o);
+            }
+          }
+
+          break;
+        }
+      }
+
+      switch (arg_mode)
+      {
+        case ::bpkg::cli::unknown_mode::skip:
+        {
+          s.skip ();
+          r = true;
+          continue;
+        }
+        case ::bpkg::cli::unknown_mode::stop:
+        {
+          break;
+        }
+        case ::bpkg::cli::unknown_mode::fail:
+        {
+          throw ::bpkg::cli::unknown_argument (o);
+        }
+      }
+
+      break;
+    }
+
+    return r;
+  }
+}
+
+namespace bpkg
+{
+  ::bpkg::cli::usage_para
+  print_bpkg_cfg_create_usage (::std::ostream& os, ::bpkg::cli::usage_para p)
+  {
+    CLI_POTENTIALLY_UNUSED (os);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mSYNOPSIS\033[0m" << ::std::endl
+       << ::std::endl
+       << "\033[1mbpkg cfg-create\033[0m|\033[1mcreate\033[0m [\033[4moptions\033[0m] [\033[4mcfg-args\033[0m]" << ::std::endl
+       << "\033[1mbpkg cfg-create\033[0m|\033[1mcreate\033[0m [\033[4moptions\033[0m] \033[1m--existing|-e\033[0m\033[0m" << ::std::endl
+       << ::std::endl
+       << "\033[4mcfg-args\033[0m = (\033[4mmodule\033[0m | \033[4mcfg-var\033[0m)...\033[0m" << ::std::endl
+       << ::std::endl
+       << "\033[1mDESCRIPTION\033[0m" << ::std::endl
+       << ::std::endl
+       << "The \033[1mcfg-create\033[0m command creates a new \033[1mbpkg\033[0m configuration with the specified" << ::std::endl
+       << "\033[1mbuild2\033[0m modules and configuration variables (the first form) or initializes one" << ::std::endl
+       << "based on an existing build system configuration (the second form). The \033[1mbpkg\033[0m" << ::std::endl
+       << "configuration itself is a build system configuration; see build system driver" << ::std::endl
+       << "(\033[1mb(1)\033[0m) \033[1mcreate\033[0m meta-operation for details." << ::std::endl
+       << ::std::endl
+       << "Unless the \033[1m--existing|-e\033[0m or \033[1m--wipe\033[0m option is specified, \033[1mcfg-create\033[0m expects the" << ::std::endl
+       << "configuration directory to be empty or to not exist (in which case it will be" << ::std::endl
+       << "created)." << ::std::endl
+       << ::std::endl
+       << "By default, the configuration created with the first form loads the \033[1mconfig\033[0m," << ::std::endl
+       << "\033[1mtest\033[0m, \033[1mdist\033[0m, and \033[1minstall\033[0m modules. However, additional modules and, if required," << ::std::endl
+       << "their configuration variables can be specified as the \033[1mcfg-create\033[0m arguments. For" << ::std::endl
+       << "example:" << ::std::endl
+       << ::std::endl
+       << "bpkg create cxx config.cxx=clang++ config.install.root=/usr/local" << ::std::endl
+       << ::std::endl
+       << "By default, \033[1mbpkg\033[0m appends \033[1m.config\033[0m to the names of the modules that you specify" << ::std::endl
+       << "so that only their configurations are loaded. You can override this behavior by" << ::std::endl
+       << "specifying the period (\033[1m.\033[0m) after the module name. You can also instruct \033[1mbpkg\033[0m to" << ::std::endl
+       << "use the optional module load by prefixing the module name with the question" << ::std::endl
+       << "mark (\033[1m?\033[0m). For example:" << ::std::endl
+       << ::std::endl
+       << "bpkg create cxx. \"?cli\"" << ::std::endl
+       << ::std::endl
+       << "Configurations can be linked with each other to allow a package to be built in" << ::std::endl
+       << "one configuration while its dependencies in one or more linked configurations." << ::std::endl
+       << "This can be used to create a \"base\" configuration with common dependencies that" << ::std::endl
+       << "are shared between multiple configurations. This mechanism is also used to" << ::std::endl
+       << "provide a host configuration that is used to build build-time dependencies." << ::std::endl
+       << ::std::endl
+       << "Each configuration is assigned an automatically-generated UUID unless one is" << ::std::endl
+       << "specified with the \033[1m--uuid\033[0m option. This UUID is used to check the integrity of" << ::std::endl
+       << "configuration links. For convenience of referring to linked configurations, a" << ::std::endl
+       << "configuration can also be assigned a name with the \033[1m--name\033[0m option." << ::std::endl
+       << ::std::endl
+       << "A configuration also has a type specified with the \033[1m--type\033[0m option. Three" << ::std::endl
+       << "predefined types are \033[1mtarget\033[0m, \033[1mhost\033[0m, and \033[1mbuild2\033[0m. If the type is not specified" << ::std::endl
+       << "explicitly, then \033[1mtarget\033[0m is assumed. When satisfying a dependency of one package" << ::std::endl
+       << "on another, a linked configuration will only be considered if (1) it has the" << ::std::endl
+       << "same type as the other configuration for run-time dependencies, (2) it has the" << ::std::endl
+       << "\033[1mhost\033[0m type for regular build-time dependencies, and (3) it has the \033[1mbuild2\033[0m type" << ::std::endl
+       << "for build system module build-time dependencies. Note that a host configuration" << ::std::endl
+       << "is a target configuration for the host machine. So to create a self-hosted" << ::std::endl
+       << "configuration, use type \033[1mhost\033[0m." << ::std::endl
+       << ::std::endl
+       << "To link a configuration we use the \033[1mbpkg-cfg-link(1)\033[0m command. As a shortcut," << ::std::endl
+       << "host and build system module configurations can also be linked during the" << ::std::endl
+       << "configuration creation with the \033[1m--host-config\033[0m and \033[1m--build2-config\033[0m options," << ::std::endl
+       << "respectively. If a build-time dependency is encountered in a configuration that" << ::std::endl
+       << "has no linked configuration of a suitable type (\033[1mhost\033[0m or \033[1mbuild2\033[0m, nor is itself" << ::std::endl
+       << "of a suitable type), then a private host or build system module configuration" << ::std::endl
+       << "named \033[1mhost\033[0m or \033[1mbuild2\033[0m, respectively, is created automatically inside the" << ::std::endl
+       << "configuration's .bpkg/\033[0m subdirectory." << ::std::endl;
+
+    p = ::bpkg::cfg_create_options::print_usage (os, ::bpkg::cli::usage_para::text);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mDEFAULT OPTIONS FILES\033[0m" << ::std::endl
+       << ::std::endl
+       << "See \033[1mbpkg-default-options-files(1)\033[0m for an overview of the default options files." << ::std::endl
+       << "For the \033[1mcfg-create\033[0m command the search start directory is the parent directory" << ::std::endl
+       << "of the new configuration. The following options files are searched for in each" << ::std::endl
+       << "directory and, if found, loaded in the order listed:" << ::std::endl
+       << ::std::endl
+       << "bpkg.options" << ::std::endl
+       << "bpkg-cfg-create.options" << ::std::endl
+       << ::std::endl
+       << "The following \033[1mcfg-create\033[0m command options cannot be specified in the default" << ::std::endl
+       << "options files:" << ::std::endl
+       << ::std::endl
+       << "--directory|-d" << ::std::endl
+       << "--wipe" << ::std::endl;
+
+    p = ::bpkg::cli::usage_para::text;
+
+    return p;
+  }
+}
+
+// Begin epilogue.
+//
+//
+// End epilogue.
+
diff --git a/bpkg/cfg-create-options.hxx b/bpkg/cfg-create-options.hxx
new file mode 100644
index 0000000..f47594d
--- /dev/null
+++ b/bpkg/cfg-create-options.hxx
@@ -0,0 +1,173 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+#ifndef BPKG_CFG_CREATE_OPTIONS_HXX
+#define BPKG_CFG_CREATE_OPTIONS_HXX
+
+// Begin prologue.
+//
+//
+// End prologue.
+
+#include <bpkg/common-options.hxx>
+
+namespace bpkg
+{
+  class cfg_create_options: public ::bpkg::common_options
+  {
+    public:
+    cfg_create_options ();
+
+    // Return true if anything has been parsed.
+    //
+    bool
+    parse (int& argc,
+           char** argv,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int start,
+           int& argc,
+           char** argv,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int& argc,
+           char** argv,
+           int& end,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int start,
+           int& argc,
+           char** argv,
+           int& end,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (::bpkg::cli::scanner&,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    // Merge options from the specified instance appending/overriding
+    // them as if they appeared after options in this instance.
+    //
+    void
+    merge (const cfg_create_options&);
+
+    // Option accessors.
+    //
+    const dir_path&
+    directory () const;
+
+    bool
+    directory_specified () const;
+
+    const bool&
+    existing () const;
+
+    const bool&
+    wipe () const;
+
+    const dir_path&
+    host_config () const;
+
+    bool
+    host_config_specified () const;
+
+    const bool&
+    no_host_config () const;
+
+    const dir_path&
+    build2_config () const;
+
+    bool
+    build2_config_specified () const;
+
+    const bool&
+    no_build2_config () const;
+
+    const string&
+    name () const;
+
+    bool
+    name_specified () const;
+
+    const string&
+    type () const;
+
+    bool
+    type_specified () const;
+
+    const uuid_type&
+    uuid () const;
+
+    bool
+    uuid_specified () const;
+
+    // Print usage information.
+    //
+    static ::bpkg::cli::usage_para
+    print_usage (::std::ostream&,
+                 ::bpkg::cli::usage_para = ::bpkg::cli::usage_para::none);
+
+    // Implementation details.
+    //
+    protected:
+    bool
+    _parse (const char*, ::bpkg::cli::scanner&);
+
+    private:
+    bool
+    _parse (::bpkg::cli::scanner&,
+            ::bpkg::cli::unknown_mode option,
+            ::bpkg::cli::unknown_mode argument);
+
+    public:
+    dir_path directory_;
+    bool directory_specified_;
+    bool existing_;
+    bool wipe_;
+    dir_path host_config_;
+    bool host_config_specified_;
+    bool no_host_config_;
+    dir_path build2_config_;
+    bool build2_config_specified_;
+    bool no_build2_config_;
+    string name_;
+    bool name_specified_;
+    string type_;
+    bool type_specified_;
+    uuid_type uuid_;
+    bool uuid_specified_;
+  };
+}
+
+// Print page usage information.
+//
+namespace bpkg
+{
+  ::bpkg::cli::usage_para
+  print_bpkg_cfg_create_usage (::std::ostream&,
+                               ::bpkg::cli::usage_para = ::bpkg::cli::usage_para::none);
+}
+
+#include <bpkg/cfg-create-options.ixx>
+
+// Begin epilogue.
+//
+//
+// End epilogue.
+
+#endif // BPKG_CFG_CREATE_OPTIONS_HXX
diff --git a/bpkg/cfg-create-options.ixx b/bpkg/cfg-create-options.ixx
new file mode 100644
index 0000000..9e8b1f6
--- /dev/null
+++ b/bpkg/cfg-create-options.ixx
@@ -0,0 +1,117 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+// Begin prologue.
+//
+//
+// End prologue.
+
+namespace bpkg
+{
+  // cfg_create_options
+  //
+
+  inline const dir_path& cfg_create_options::
+  directory () const
+  {
+    return this->directory_;
+  }
+
+  inline bool cfg_create_options::
+  directory_specified () const
+  {
+    return this->directory_specified_;
+  }
+
+  inline const bool& cfg_create_options::
+  existing () const
+  {
+    return this->existing_;
+  }
+
+  inline const bool& cfg_create_options::
+  wipe () const
+  {
+    return this->wipe_;
+  }
+
+  inline const dir_path& cfg_create_options::
+  host_config () const
+  {
+    return this->host_config_;
+  }
+
+  inline bool cfg_create_options::
+  host_config_specified () const
+  {
+    return this->host_config_specified_;
+  }
+
+  inline const bool& cfg_create_options::
+  no_host_config () const
+  {
+    return this->no_host_config_;
+  }
+
+  inline const dir_path& cfg_create_options::
+  build2_config () const
+  {
+    return this->build2_config_;
+  }
+
+  inline bool cfg_create_options::
+  build2_config_specified () const
+  {
+    return this->build2_config_specified_;
+  }
+
+  inline const bool& cfg_create_options::
+  no_build2_config () const
+  {
+    return this->no_build2_config_;
+  }
+
+  inline const string& cfg_create_options::
+  name () const
+  {
+    return this->name_;
+  }
+
+  inline bool cfg_create_options::
+  name_specified () const
+  {
+    return this->name_specified_;
+  }
+
+  inline const string& cfg_create_options::
+  type () const
+  {
+    return this->type_;
+  }
+
+  inline bool cfg_create_options::
+  type_specified () const
+  {
+    return this->type_specified_;
+  }
+
+  inline const uuid_type& cfg_create_options::
+  uuid () const
+  {
+    return this->uuid_;
+  }
+
+  inline bool cfg_create_options::
+  uuid_specified () const
+  {
+    return this->uuid_specified_;
+  }
+}
+
+// Begin epilogue.
+//
+//
+// End epilogue.
diff --git a/bpkg/cfg-info-options.cxx b/bpkg/cfg-info-options.cxx
new file mode 100644
index 0000000..1a56f00
--- /dev/null
+++ b/bpkg/cfg-info-options.cxx
@@ -0,0 +1,656 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+// Begin prologue.
+//
+#include <bpkg/types-parsers.hxx>
+//
+// End prologue.
+
+#include <bpkg/cfg-info-options.hxx>
+
+#include <map>
+#include <set>
+#include <string>
+#include <vector>
+#include <utility>
+#include <ostream>
+#include <sstream>
+
+namespace bpkg
+{
+  namespace cli
+  {
+    template <typename X>
+    struct parser
+    {
+      static void
+      parse (X& x, bool& xs, scanner& s)
+      {
+        using namespace std;
+
+        const char* o (s.next ());
+        if (s.more ())
+        {
+          string v (s.next ());
+          istringstream is (v);
+          if (!(is >> x && is.peek () == istringstream::traits_type::eof ()))
+            throw invalid_value (o, v);
+        }
+        else
+          throw missing_value (o);
+
+        xs = true;
+      }
+
+      static void
+      merge (X& b, const X& a)
+      {
+        b = a;
+      }
+    };
+
+    template <>
+    struct parser<bool>
+    {
+      static void
+      parse (bool& x, scanner& s)
+      {
+        s.next ();
+        x = true;
+      }
+
+      static void
+      merge (bool& b, const bool&)
+      {
+        b = true;
+      }
+    };
+
+    template <>
+    struct parser<std::string>
+    {
+      static void
+      parse (std::string& x, bool& xs, scanner& s)
+      {
+        const char* o (s.next ());
+
+        if (s.more ())
+          x = s.next ();
+        else
+          throw missing_value (o);
+
+        xs = true;
+      }
+
+      static void
+      merge (std::string& b, const std::string& a)
+      {
+        b = a;
+      }
+    };
+
+    template <typename X>
+    struct parser<std::pair<X, std::size_t> >
+    {
+      static void
+      parse (std::pair<X, std::size_t>& x, bool& xs, scanner& s)
+      {
+        x.second = s.position ();
+        parser<X>::parse (x.first, xs, s);
+      }
+
+      static void
+      merge (std::pair<X, std::size_t>& b, const std::pair<X, std::size_t>& a)
+      {
+        b = a;
+      }
+    };
+
+    template <typename X>
+    struct parser<std::vector<X> >
+    {
+      static void
+      parse (std::vector<X>& c, bool& xs, scanner& s)
+      {
+        X x;
+        bool dummy;
+        parser<X>::parse (x, dummy, s);
+        c.push_back (x);
+        xs = true;
+      }
+
+      static void
+      merge (std::vector<X>& b, const std::vector<X>& a)
+      {
+        b.insert (b.end (), a.begin (), a.end ());
+      }
+    };
+
+    template <typename X, typename C>
+    struct parser<std::set<X, C> >
+    {
+      static void
+      parse (std::set<X, C>& c, bool& xs, scanner& s)
+      {
+        X x;
+        bool dummy;
+        parser<X>::parse (x, dummy, s);
+        c.insert (x);
+        xs = true;
+      }
+
+      static void
+      merge (std::set<X, C>& b, const std::set<X, C>& a)
+      {
+        b.insert (a.begin (), a.end ());
+      }
+    };
+
+    template <typename K, typename V, typename C>
+    struct parser<std::map<K, V, C> >
+    {
+      static void
+      parse (std::map<K, V, C>& m, bool& xs, scanner& s)
+      {
+        const char* o (s.next ());
+
+        if (s.more ())
+        {
+          std::size_t pos (s.position ());
+          std::string ov (s.next ());
+          std::string::size_type p = ov.find ('=');
+
+          K k = K ();
+          V v = V ();
+          std::string kstr (ov, 0, p);
+          std::string vstr (ov, (p != std::string::npos ? p + 1 : ov.size ()));
+
+          int ac (2);
+          char* av[] =
+          {
+            const_cast<char*> (o),
+            0
+          };
+
+          bool dummy;
+          if (!kstr.empty ())
+          {
+            av[1] = const_cast<char*> (kstr.c_str ());
+            argv_scanner s (0, ac, av, false, pos);
+            parser<K>::parse (k, dummy, s);
+          }
+
+          if (!vstr.empty ())
+          {
+            av[1] = const_cast<char*> (vstr.c_str ());
+            argv_scanner s (0, ac, av, false, pos);
+            parser<V>::parse (v, dummy, s);
+          }
+
+          m[k] = v;
+        }
+        else
+          throw missing_value (o);
+
+        xs = true;
+      }
+
+      static void
+      merge (std::map<K, V, C>& b, const std::map<K, V, C>& a)
+      {
+        for (typename std::map<K, V, C>::const_iterator i (a.begin ()); 
+             i != a.end (); 
+             ++i)
+          b[i->first] = i->second;
+      }
+    };
+
+    template <typename X, typename T, T X::*M>
+    void
+    thunk (X& x, scanner& s)
+    {
+      parser<T>::parse (x.*M, s);
+    }
+
+    template <typename X, typename T, T X::*M, bool X::*S>
+    void
+    thunk (X& x, scanner& s)
+    {
+      parser<T>::parse (x.*M, x.*S, s);
+    }
+  }
+}
+
+#include <map>
+#include <cstring>
+
+namespace bpkg
+{
+  // cfg_info_options
+  //
+
+  cfg_info_options::
+  cfg_info_options ()
+  : link_ (),
+    backlink_ (),
+    dangling_ (),
+    recursive_ ()
+  {
+  }
+
+  bool cfg_info_options::
+  parse (int& argc,
+         char** argv,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  bool cfg_info_options::
+  parse (int start,
+         int& argc,
+         char** argv,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (start, argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  bool cfg_info_options::
+  parse (int& argc,
+         char** argv,
+         int& end,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    end = s.end ();
+    return r;
+  }
+
+  bool cfg_info_options::
+  parse (int start,
+         int& argc,
+         char** argv,
+         int& end,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (start, argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    end = s.end ();
+    return r;
+  }
+
+  bool cfg_info_options::
+  parse (::bpkg::cli::scanner& s,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  void cfg_info_options::
+  merge (const cfg_info_options& a)
+  {
+    CLI_POTENTIALLY_UNUSED (a);
+
+    // configuration_options base
+    //
+    ::bpkg::configuration_options::merge (a);
+
+    if (a.link_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->link_, a.link_);
+    }
+
+    if (a.backlink_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->backlink_, a.backlink_);
+    }
+
+    if (a.dangling_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->dangling_, a.dangling_);
+    }
+
+    if (a.recursive_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->recursive_, a.recursive_);
+    }
+  }
+
+  ::bpkg::cli::usage_para cfg_info_options::
+  print_usage (::std::ostream& os, ::bpkg::cli::usage_para p)
+  {
+    CLI_POTENTIALLY_UNUSED (os);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mCFG-INFO OPTIONS\033[0m" << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--link\033[0m                   Print linked configurations." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--backlink\033[0m               Print implicitly backlinked configurations." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--dangling\033[0m               Print dangling implicit backlinks." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--recursive\033[0m              Print linked configurations recursively." << ::std::endl;
+
+    p = ::bpkg::cli::usage_para::option;
+
+    // configuration_options base
+    //
+    p = ::bpkg::configuration_options::print_usage (os, p);
+
+    return p;
+  }
+
+  typedef
+  std::map<std::string, void (*) (cfg_info_options&, ::bpkg::cli::scanner&)>
+  _cli_cfg_info_options_map;
+
+  static _cli_cfg_info_options_map _cli_cfg_info_options_map_;
+
+  struct _cli_cfg_info_options_map_init
+  {
+    _cli_cfg_info_options_map_init ()
+    {
+      _cli_cfg_info_options_map_["--link"] =
+      &::bpkg::cli::thunk< cfg_info_options, bool, &cfg_info_options::link_ >;
+      _cli_cfg_info_options_map_["--backlink"] =
+      &::bpkg::cli::thunk< cfg_info_options, bool, &cfg_info_options::backlink_ >;
+      _cli_cfg_info_options_map_["--dangling"] =
+      &::bpkg::cli::thunk< cfg_info_options, bool, &cfg_info_options::dangling_ >;
+      _cli_cfg_info_options_map_["--recursive"] =
+      &::bpkg::cli::thunk< cfg_info_options, bool, &cfg_info_options::recursive_ >;
+    }
+  };
+
+  static _cli_cfg_info_options_map_init _cli_cfg_info_options_map_init_;
+
+  bool cfg_info_options::
+  _parse (const char* o, ::bpkg::cli::scanner& s)
+  {
+    _cli_cfg_info_options_map::const_iterator i (_cli_cfg_info_options_map_.find (o));
+
+    if (i != _cli_cfg_info_options_map_.end ())
+    {
+      (*(i->second)) (*this, s);
+      return true;
+    }
+
+    // configuration_options base
+    //
+    if (::bpkg::configuration_options::_parse (o, s))
+      return true;
+
+    return false;
+  }
+
+  bool cfg_info_options::
+  _parse (::bpkg::cli::scanner& s,
+          ::bpkg::cli::unknown_mode opt_mode,
+          ::bpkg::cli::unknown_mode arg_mode)
+  {
+    // Can't skip combined flags (--no-combined-flags).
+    //
+    assert (opt_mode != ::bpkg::cli::unknown_mode::skip);
+
+    bool r = false;
+    bool opt = true;
+
+    while (s.more ())
+    {
+      const char* o = s.peek ();
+
+      if (std::strcmp (o, "--") == 0)
+      {
+        opt = false;
+      }
+
+      if (opt)
+      {
+        if (_parse (o, s))
+        {
+          r = true;
+          continue;
+        }
+
+        if (std::strncmp (o, "-", 1) == 0 && o[1] != '\0')
+        {
+          // Handle combined option values.
+          //
+          std::string co;
+          if (const char* v = std::strchr (o, '='))
+          {
+            co.assign (o, 0, v - o);
+            ++v;
+
+            int ac (2);
+            char* av[] =
+            {
+              const_cast<char*> (co.c_str ()),
+              const_cast<char*> (v)
+            };
+
+            ::bpkg::cli::argv_scanner ns (0, ac, av);
+
+            if (_parse (co.c_str (), ns))
+            {
+              // Parsed the option but not its value?
+              //
+              if (ns.end () != 2)
+                throw ::bpkg::cli::invalid_value (co, v);
+
+              s.next ();
+              r = true;
+              continue;
+            }
+            else
+            {
+              // Set the unknown option and fall through.
+              //
+              o = co.c_str ();
+            }
+          }
+
+          // Handle combined flags.
+          //
+          char cf[3];
+          {
+            const char* p = o + 1;
+            for (; *p != '\0'; ++p)
+            {
+              if (!((*p >= 'a' && *p <= 'z') ||
+                    (*p >= 'A' && *p <= 'Z') ||
+                    (*p >= '0' && *p <= '9')))
+                break;
+            }
+
+            if (*p == '\0')
+            {
+              for (p = o + 1; *p != '\0'; ++p)
+              {
+                std::strcpy (cf, "-");
+                cf[1] = *p;
+                cf[2] = '\0';
+
+                int ac (1);
+                char* av[] =
+                {
+                  cf
+                };
+
+                ::bpkg::cli::argv_scanner ns (0, ac, av);
+
+                if (!_parse (cf, ns))
+                  break;
+              }
+
+              if (*p == '\0')
+              {
+                // All handled.
+                //
+                s.next ();
+                r = true;
+                continue;
+              }
+              else
+              {
+                // Set the unknown option and fall through.
+                //
+                o = cf;
+              }
+            }
+          }
+
+          switch (opt_mode)
+          {
+            case ::bpkg::cli::unknown_mode::skip:
+            {
+              s.skip ();
+              r = true;
+              continue;
+            }
+            case ::bpkg::cli::unknown_mode::stop:
+            {
+              break;
+            }
+            case ::bpkg::cli::unknown_mode::fail:
+            {
+              throw ::bpkg::cli::unknown_option (o);
+            }
+          }
+
+          break;
+        }
+      }
+
+      switch (arg_mode)
+      {
+        case ::bpkg::cli::unknown_mode::skip:
+        {
+          s.skip ();
+          r = true;
+          continue;
+        }
+        case ::bpkg::cli::unknown_mode::stop:
+        {
+          break;
+        }
+        case ::bpkg::cli::unknown_mode::fail:
+        {
+          throw ::bpkg::cli::unknown_argument (o);
+        }
+      }
+
+      break;
+    }
+
+    return r;
+  }
+}
+
+namespace bpkg
+{
+  ::bpkg::cli::usage_para
+  print_bpkg_cfg_info_usage (::std::ostream& os, ::bpkg::cli::usage_para p)
+  {
+    CLI_POTENTIALLY_UNUSED (os);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mSYNOPSIS\033[0m" << ::std::endl
+       << ::std::endl
+       << "\033[1mbpkg cfg-info\033[0m [\033[4moptions\033[0m]\033[0m" << ::std::endl
+       << ::std::endl
+       << "\033[1mDESCRIPTION\033[0m" << ::std::endl
+       << ::std::endl
+       << "The \033[1mcfg-info\033[0m command prints the current configuration's absolute path, id," << ::std::endl
+       << "type, and name. If the \033[1m--link\033[0m and/or \033[1m--backlink\033[0m options are specified, then" << ::std::endl
+       << "this information is also printed for each linked and/or implicitly backlinked" << ::std::endl
+       << "configuration, if any. Note that the dangling implicit backlinks are silently" << ::std::endl
+       << "skipped, unless \033[1m--dangling\033[0m is specified, in which case this information is also" << ::std::endl
+       << "printed for them. Note that the information is written to \033[1mstdout\033[0m, not \033[1mstderr\033[0m." << ::std::endl
+       << ::std::endl
+       << "If the \033[1m--recursive\033[0m option is specified together with \033[1m--link\033[0m and/or \033[1m--backlink\033[0m," << ::std::endl
+       << "then this information is printed for linked and/or implicitly backlinked" << ::std::endl
+       << "configuration, recursively." << ::std::endl
+       << ::std::endl
+       << "The output format is regular with each value printed on a separate line and" << ::std::endl
+       << "prefixed with the value name. If the \033[1m--link\033[0m, \033[1m--backlink\033[0m, and/or \033[1m--dangling\033[0m" << ::std::endl
+       << "options are specified, then information blocks corresponding to linked" << ::std::endl
+       << "configurations are separated with blank lines. For example:" << ::std::endl
+       << ::std::endl
+       << "path: /path/to/cfg/" << ::std::endl
+       << "uuid: 8d439f03-7342-4502-8b1c-74b173869478" << ::std::endl
+       << "type: target" << ::std::endl
+       << "name: foo" << ::std::endl
+       << ::std::endl
+       << "path: /path/to/host-cfg/" << ::std::endl
+       << "uuid: 7ee4dab3-07d9-4163-81c0-3779166a7213" << ::std::endl
+       << "type: host" << ::std::endl
+       << "name: tools" << ::std::endl
+       << ::std::endl
+       << "path: /path/to/build2-cfg/" << ::std::endl
+       << "uuid: d453aa2a-92c4-4066-87e4-c8672eed06e1" << ::std::endl
+       << "type: build2" << ::std::endl
+       << "name: modules" << ::std::endl;
+
+    p = ::bpkg::cfg_info_options::print_usage (os, ::bpkg::cli::usage_para::text);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mDEFAULT OPTIONS FILES\033[0m" << ::std::endl
+       << ::std::endl
+       << "See \033[1mbpkg-default-options-files(1)\033[0m for an overview of the default options files." << ::std::endl
+       << "For the \033[1mcfg-info\033[0m command the search start directory is the configuration" << ::std::endl
+       << "directory. The following options files are searched for in each directory and," << ::std::endl
+       << "if found, loaded in the order listed:" << ::std::endl
+       << ::std::endl
+       << "bpkg.options" << ::std::endl
+       << "bpkg-cfg-info.options" << ::std::endl
+       << ::std::endl
+       << "The following \033[1mcfg-info\033[0m command options cannot be specified in the default" << ::std::endl
+       << "options files:" << ::std::endl
+       << ::std::endl
+       << "--directory|-d" << ::std::endl;
+
+    p = ::bpkg::cli::usage_para::text;
+
+    return p;
+  }
+}
+
+// Begin epilogue.
+//
+//
+// End epilogue.
+
diff --git a/bpkg/cfg-info-options.hxx b/bpkg/cfg-info-options.hxx
new file mode 100644
index 0000000..2024bf6
--- /dev/null
+++ b/bpkg/cfg-info-options.hxx
@@ -0,0 +1,125 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+#ifndef BPKG_CFG_INFO_OPTIONS_HXX
+#define BPKG_CFG_INFO_OPTIONS_HXX
+
+// Begin prologue.
+//
+//
+// End prologue.
+
+#include <bpkg/configuration-options.hxx>
+
+namespace bpkg
+{
+  class cfg_info_options: public ::bpkg::configuration_options
+  {
+    public:
+    cfg_info_options ();
+
+    // Return true if anything has been parsed.
+    //
+    bool
+    parse (int& argc,
+           char** argv,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int start,
+           int& argc,
+           char** argv,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int& argc,
+           char** argv,
+           int& end,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int start,
+           int& argc,
+           char** argv,
+           int& end,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (::bpkg::cli::scanner&,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    // Merge options from the specified instance appending/overriding
+    // them as if they appeared after options in this instance.
+    //
+    void
+    merge (const cfg_info_options&);
+
+    // Option accessors.
+    //
+    const bool&
+    link () const;
+
+    const bool&
+    backlink () const;
+
+    const bool&
+    dangling () const;
+
+    const bool&
+    recursive () const;
+
+    // Print usage information.
+    //
+    static ::bpkg::cli::usage_para
+    print_usage (::std::ostream&,
+                 ::bpkg::cli::usage_para = ::bpkg::cli::usage_para::none);
+
+    // Implementation details.
+    //
+    protected:
+    bool
+    _parse (const char*, ::bpkg::cli::scanner&);
+
+    private:
+    bool
+    _parse (::bpkg::cli::scanner&,
+            ::bpkg::cli::unknown_mode option,
+            ::bpkg::cli::unknown_mode argument);
+
+    public:
+    bool link_;
+    bool backlink_;
+    bool dangling_;
+    bool recursive_;
+  };
+}
+
+// Print page usage information.
+//
+namespace bpkg
+{
+  ::bpkg::cli::usage_para
+  print_bpkg_cfg_info_usage (::std::ostream&,
+                             ::bpkg::cli::usage_para = ::bpkg::cli::usage_para::none);
+}
+
+#include <bpkg/cfg-info-options.ixx>
+
+// Begin epilogue.
+//
+//
+// End epilogue.
+
+#endif // BPKG_CFG_INFO_OPTIONS_HXX
diff --git a/bpkg/cfg-info-options.ixx b/bpkg/cfg-info-options.ixx
new file mode 100644
index 0000000..3eb43b3
--- /dev/null
+++ b/bpkg/cfg-info-options.ixx
@@ -0,0 +1,45 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+// Begin prologue.
+//
+//
+// End prologue.
+
+namespace bpkg
+{
+  // cfg_info_options
+  //
+
+  inline const bool& cfg_info_options::
+  link () const
+  {
+    return this->link_;
+  }
+
+  inline const bool& cfg_info_options::
+  backlink () const
+  {
+    return this->backlink_;
+  }
+
+  inline const bool& cfg_info_options::
+  dangling () const
+  {
+    return this->dangling_;
+  }
+
+  inline const bool& cfg_info_options::
+  recursive () const
+  {
+    return this->recursive_;
+  }
+}
+
+// Begin epilogue.
+//
+//
+// End epilogue.
diff --git a/bpkg/cfg-link-options.cxx b/bpkg/cfg-link-options.cxx
new file mode 100644
index 0000000..77805f5
--- /dev/null
+++ b/bpkg/cfg-link-options.cxx
@@ -0,0 +1,626 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+// Begin prologue.
+//
+#include <bpkg/types-parsers.hxx>
+//
+// End prologue.
+
+#include <bpkg/cfg-link-options.hxx>
+
+#include <map>
+#include <set>
+#include <string>
+#include <vector>
+#include <utility>
+#include <ostream>
+#include <sstream>
+
+namespace bpkg
+{
+  namespace cli
+  {
+    template <typename X>
+    struct parser
+    {
+      static void
+      parse (X& x, bool& xs, scanner& s)
+      {
+        using namespace std;
+
+        const char* o (s.next ());
+        if (s.more ())
+        {
+          string v (s.next ());
+          istringstream is (v);
+          if (!(is >> x && is.peek () == istringstream::traits_type::eof ()))
+            throw invalid_value (o, v);
+        }
+        else
+          throw missing_value (o);
+
+        xs = true;
+      }
+
+      static void
+      merge (X& b, const X& a)
+      {
+        b = a;
+      }
+    };
+
+    template <>
+    struct parser<bool>
+    {
+      static void
+      parse (bool& x, scanner& s)
+      {
+        s.next ();
+        x = true;
+      }
+
+      static void
+      merge (bool& b, const bool&)
+      {
+        b = true;
+      }
+    };
+
+    template <>
+    struct parser<std::string>
+    {
+      static void
+      parse (std::string& x, bool& xs, scanner& s)
+      {
+        const char* o (s.next ());
+
+        if (s.more ())
+          x = s.next ();
+        else
+          throw missing_value (o);
+
+        xs = true;
+      }
+
+      static void
+      merge (std::string& b, const std::string& a)
+      {
+        b = a;
+      }
+    };
+
+    template <typename X>
+    struct parser<std::pair<X, std::size_t> >
+    {
+      static void
+      parse (std::pair<X, std::size_t>& x, bool& xs, scanner& s)
+      {
+        x.second = s.position ();
+        parser<X>::parse (x.first, xs, s);
+      }
+
+      static void
+      merge (std::pair<X, std::size_t>& b, const std::pair<X, std::size_t>& a)
+      {
+        b = a;
+      }
+    };
+
+    template <typename X>
+    struct parser<std::vector<X> >
+    {
+      static void
+      parse (std::vector<X>& c, bool& xs, scanner& s)
+      {
+        X x;
+        bool dummy;
+        parser<X>::parse (x, dummy, s);
+        c.push_back (x);
+        xs = true;
+      }
+
+      static void
+      merge (std::vector<X>& b, const std::vector<X>& a)
+      {
+        b.insert (b.end (), a.begin (), a.end ());
+      }
+    };
+
+    template <typename X, typename C>
+    struct parser<std::set<X, C> >
+    {
+      static void
+      parse (std::set<X, C>& c, bool& xs, scanner& s)
+      {
+        X x;
+        bool dummy;
+        parser<X>::parse (x, dummy, s);
+        c.insert (x);
+        xs = true;
+      }
+
+      static void
+      merge (std::set<X, C>& b, const std::set<X, C>& a)
+      {
+        b.insert (a.begin (), a.end ());
+      }
+    };
+
+    template <typename K, typename V, typename C>
+    struct parser<std::map<K, V, C> >
+    {
+      static void
+      parse (std::map<K, V, C>& m, bool& xs, scanner& s)
+      {
+        const char* o (s.next ());
+
+        if (s.more ())
+        {
+          std::size_t pos (s.position ());
+          std::string ov (s.next ());
+          std::string::size_type p = ov.find ('=');
+
+          K k = K ();
+          V v = V ();
+          std::string kstr (ov, 0, p);
+          std::string vstr (ov, (p != std::string::npos ? p + 1 : ov.size ()));
+
+          int ac (2);
+          char* av[] =
+          {
+            const_cast<char*> (o),
+            0
+          };
+
+          bool dummy;
+          if (!kstr.empty ())
+          {
+            av[1] = const_cast<char*> (kstr.c_str ());
+            argv_scanner s (0, ac, av, false, pos);
+            parser<K>::parse (k, dummy, s);
+          }
+
+          if (!vstr.empty ())
+          {
+            av[1] = const_cast<char*> (vstr.c_str ());
+            argv_scanner s (0, ac, av, false, pos);
+            parser<V>::parse (v, dummy, s);
+          }
+
+          m[k] = v;
+        }
+        else
+          throw missing_value (o);
+
+        xs = true;
+      }
+
+      static void
+      merge (std::map<K, V, C>& b, const std::map<K, V, C>& a)
+      {
+        for (typename std::map<K, V, C>::const_iterator i (a.begin ()); 
+             i != a.end (); 
+             ++i)
+          b[i->first] = i->second;
+      }
+    };
+
+    template <typename X, typename T, T X::*M>
+    void
+    thunk (X& x, scanner& s)
+    {
+      parser<T>::parse (x.*M, s);
+    }
+
+    template <typename X, typename T, T X::*M, bool X::*S>
+    void
+    thunk (X& x, scanner& s)
+    {
+      parser<T>::parse (x.*M, x.*S, s);
+    }
+  }
+}
+
+#include <map>
+#include <cstring>
+
+namespace bpkg
+{
+  // cfg_link_options
+  //
+
+  cfg_link_options::
+  cfg_link_options ()
+  : name_ (),
+    name_specified_ (false),
+    relative_ ()
+  {
+  }
+
+  bool cfg_link_options::
+  parse (int& argc,
+         char** argv,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  bool cfg_link_options::
+  parse (int start,
+         int& argc,
+         char** argv,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (start, argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  bool cfg_link_options::
+  parse (int& argc,
+         char** argv,
+         int& end,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    end = s.end ();
+    return r;
+  }
+
+  bool cfg_link_options::
+  parse (int start,
+         int& argc,
+         char** argv,
+         int& end,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (start, argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    end = s.end ();
+    return r;
+  }
+
+  bool cfg_link_options::
+  parse (::bpkg::cli::scanner& s,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  void cfg_link_options::
+  merge (const cfg_link_options& a)
+  {
+    CLI_POTENTIALLY_UNUSED (a);
+
+    // configuration_options base
+    //
+    ::bpkg::configuration_options::merge (a);
+
+    if (a.name_specified_)
+    {
+      ::bpkg::cli::parser< string>::merge (
+        this->name_, a.name_);
+      this->name_specified_ = true;
+    }
+
+    if (a.relative_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->relative_, a.relative_);
+    }
+  }
+
+  ::bpkg::cli::usage_para cfg_link_options::
+  print_usage (::std::ostream& os, ::bpkg::cli::usage_para p)
+  {
+    CLI_POTENTIALLY_UNUSED (os);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mCFG-LINK OPTIONS\033[0m" << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--name\033[0m \033[4mname\033[0m              Alternative link name. If this option is not" << ::std::endl
+       << "                         specified, then the configuration name is used as the" << ::std::endl
+       << "                         link name (see \033[1mbpkg-cfg-create(1)\033[0m for details)." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--relative\033[0m               Rebase the absolute linked configuration path relative" << ::std::endl
+       << "                         to the current configuration directory." << ::std::endl;
+
+    p = ::bpkg::cli::usage_para::option;
+
+    // configuration_options base
+    //
+    p = ::bpkg::configuration_options::print_usage (os, p);
+
+    return p;
+  }
+
+  typedef
+  std::map<std::string, void (*) (cfg_link_options&, ::bpkg::cli::scanner&)>
+  _cli_cfg_link_options_map;
+
+  static _cli_cfg_link_options_map _cli_cfg_link_options_map_;
+
+  struct _cli_cfg_link_options_map_init
+  {
+    _cli_cfg_link_options_map_init ()
+    {
+      _cli_cfg_link_options_map_["--name"] =
+      &::bpkg::cli::thunk< cfg_link_options, string, &cfg_link_options::name_,
+        &cfg_link_options::name_specified_ >;
+      _cli_cfg_link_options_map_["--relative"] =
+      &::bpkg::cli::thunk< cfg_link_options, bool, &cfg_link_options::relative_ >;
+    }
+  };
+
+  static _cli_cfg_link_options_map_init _cli_cfg_link_options_map_init_;
+
+  bool cfg_link_options::
+  _parse (const char* o, ::bpkg::cli::scanner& s)
+  {
+    _cli_cfg_link_options_map::const_iterator i (_cli_cfg_link_options_map_.find (o));
+
+    if (i != _cli_cfg_link_options_map_.end ())
+    {
+      (*(i->second)) (*this, s);
+      return true;
+    }
+
+    // configuration_options base
+    //
+    if (::bpkg::configuration_options::_parse (o, s))
+      return true;
+
+    return false;
+  }
+
+  bool cfg_link_options::
+  _parse (::bpkg::cli::scanner& s,
+          ::bpkg::cli::unknown_mode opt_mode,
+          ::bpkg::cli::unknown_mode arg_mode)
+  {
+    // Can't skip combined flags (--no-combined-flags).
+    //
+    assert (opt_mode != ::bpkg::cli::unknown_mode::skip);
+
+    bool r = false;
+    bool opt = true;
+
+    while (s.more ())
+    {
+      const char* o = s.peek ();
+
+      if (std::strcmp (o, "--") == 0)
+      {
+        opt = false;
+      }
+
+      if (opt)
+      {
+        if (_parse (o, s))
+        {
+          r = true;
+          continue;
+        }
+
+        if (std::strncmp (o, "-", 1) == 0 && o[1] != '\0')
+        {
+          // Handle combined option values.
+          //
+          std::string co;
+          if (const char* v = std::strchr (o, '='))
+          {
+            co.assign (o, 0, v - o);
+            ++v;
+
+            int ac (2);
+            char* av[] =
+            {
+              const_cast<char*> (co.c_str ()),
+              const_cast<char*> (v)
+            };
+
+            ::bpkg::cli::argv_scanner ns (0, ac, av);
+
+            if (_parse (co.c_str (), ns))
+            {
+              // Parsed the option but not its value?
+              //
+              if (ns.end () != 2)
+                throw ::bpkg::cli::invalid_value (co, v);
+
+              s.next ();
+              r = true;
+              continue;
+            }
+            else
+            {
+              // Set the unknown option and fall through.
+              //
+              o = co.c_str ();
+            }
+          }
+
+          // Handle combined flags.
+          //
+          char cf[3];
+          {
+            const char* p = o + 1;
+            for (; *p != '\0'; ++p)
+            {
+              if (!((*p >= 'a' && *p <= 'z') ||
+                    (*p >= 'A' && *p <= 'Z') ||
+                    (*p >= '0' && *p <= '9')))
+                break;
+            }
+
+            if (*p == '\0')
+            {
+              for (p = o + 1; *p != '\0'; ++p)
+              {
+                std::strcpy (cf, "-");
+                cf[1] = *p;
+                cf[2] = '\0';
+
+                int ac (1);
+                char* av[] =
+                {
+                  cf
+                };
+
+                ::bpkg::cli::argv_scanner ns (0, ac, av);
+
+                if (!_parse (cf, ns))
+                  break;
+              }
+
+              if (*p == '\0')
+              {
+                // All handled.
+                //
+                s.next ();
+                r = true;
+                continue;
+              }
+              else
+              {
+                // Set the unknown option and fall through.
+                //
+                o = cf;
+              }
+            }
+          }
+
+          switch (opt_mode)
+          {
+            case ::bpkg::cli::unknown_mode::skip:
+            {
+              s.skip ();
+              r = true;
+              continue;
+            }
+            case ::bpkg::cli::unknown_mode::stop:
+            {
+              break;
+            }
+            case ::bpkg::cli::unknown_mode::fail:
+            {
+              throw ::bpkg::cli::unknown_option (o);
+            }
+          }
+
+          break;
+        }
+      }
+
+      switch (arg_mode)
+      {
+        case ::bpkg::cli::unknown_mode::skip:
+        {
+          s.skip ();
+          r = true;
+          continue;
+        }
+        case ::bpkg::cli::unknown_mode::stop:
+        {
+          break;
+        }
+        case ::bpkg::cli::unknown_mode::fail:
+        {
+          throw ::bpkg::cli::unknown_argument (o);
+        }
+      }
+
+      break;
+    }
+
+    return r;
+  }
+}
+
+namespace bpkg
+{
+  ::bpkg::cli::usage_para
+  print_bpkg_cfg_link_usage (::std::ostream& os, ::bpkg::cli::usage_para p)
+  {
+    CLI_POTENTIALLY_UNUSED (os);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mSYNOPSIS\033[0m" << ::std::endl
+       << ::std::endl
+       << "\033[1mbpkg cfg-link\033[0m [\033[4moptions\033[0m] \033[4mdir\033[0m\033[0m" << ::std::endl
+       << ::std::endl
+       << "\033[1mDESCRIPTION\033[0m" << ::std::endl
+       << ::std::endl
+       << "The \033[1mcfg-link\033[0m command links the specified \033[1mbpkg\033[0m configuration with the current" << ::std::endl
+       << "configuration. Note that it also establishes an implicit backlink from the" << ::std::endl
+       << "specified to the current configuration. See \033[1mbpkg-cfg-create(1)\033[0m for background" << ::std::endl
+       << "on linked configurations. To unlink previously linked configurations use" << ::std::endl
+       << "\033[1mbpkg-cfg-unlink(1)\033[0m." << ::std::endl
+       << ::std::endl
+       << "The linked configurations are normally referred to using names when specified" << ::std::endl
+       << "on the \033[1mbpkg\033[0m command line. Unless overridden with the \033[1m--name\033[0m option, the" << ::std::endl
+       << "original configuration name is used to name the link. If the link is unnamed," << ::std::endl
+       << "then it can be referred to using the numeric id that is automatically assigned" << ::std::endl
+       << "when establishing the link or using the configuration UUID." << ::std::endl
+       << ::std::endl
+       << "If the specified configuration path is relative, then it is rebased relative to" << ::std::endl
+       << "the current configuration directory. This way, when the linked configurations" << ::std::endl
+       << "are moved around together, the stored relative paths remain valid. If the" << ::std::endl
+       << "specified directory path is absolute, then it is stored as absolute unless the" << ::std::endl
+       << "\033[1m--relative\033[0m option is specified in which case it is also rebased relative to the" << ::std::endl
+       << "current configuration directory." << ::std::endl;
+
+    p = ::bpkg::cfg_link_options::print_usage (os, ::bpkg::cli::usage_para::text);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mDEFAULT OPTIONS FILES\033[0m" << ::std::endl
+       << ::std::endl
+       << "See \033[1mbpkg-default-options-files(1)\033[0m for an overview of the default options files." << ::std::endl
+       << "For the \033[1mcfg-link\033[0m command the search start directory is the configuration" << ::std::endl
+       << "directory. The following options files are searched for in each directory and," << ::std::endl
+       << "if found, loaded in the order listed:" << ::std::endl
+       << ::std::endl
+       << "bpkg.options" << ::std::endl
+       << "bpkg-cfg-link.options" << ::std::endl
+       << ::std::endl
+       << "The following \033[1mcfg-link\033[0m command options cannot be specified in the default" << ::std::endl
+       << "options files:" << ::std::endl
+       << ::std::endl
+       << "--directory|-d" << ::std::endl;
+
+    p = ::bpkg::cli::usage_para::text;
+
+    return p;
+  }
+}
+
+// Begin epilogue.
+//
+//
+// End epilogue.
+
diff --git a/bpkg/cfg-link-options.hxx b/bpkg/cfg-link-options.hxx
new file mode 100644
index 0000000..9c506ce
--- /dev/null
+++ b/bpkg/cfg-link-options.hxx
@@ -0,0 +1,121 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+#ifndef BPKG_CFG_LINK_OPTIONS_HXX
+#define BPKG_CFG_LINK_OPTIONS_HXX
+
+// Begin prologue.
+//
+//
+// End prologue.
+
+#include <bpkg/configuration-options.hxx>
+
+namespace bpkg
+{
+  class cfg_link_options: public ::bpkg::configuration_options
+  {
+    public:
+    cfg_link_options ();
+
+    // Return true if anything has been parsed.
+    //
+    bool
+    parse (int& argc,
+           char** argv,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int start,
+           int& argc,
+           char** argv,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int& argc,
+           char** argv,
+           int& end,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int start,
+           int& argc,
+           char** argv,
+           int& end,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (::bpkg::cli::scanner&,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    // Merge options from the specified instance appending/overriding
+    // them as if they appeared after options in this instance.
+    //
+    void
+    merge (const cfg_link_options&);
+
+    // Option accessors.
+    //
+    const string&
+    name () const;
+
+    bool
+    name_specified () const;
+
+    const bool&
+    relative () const;
+
+    // Print usage information.
+    //
+    static ::bpkg::cli::usage_para
+    print_usage (::std::ostream&,
+                 ::bpkg::cli::usage_para = ::bpkg::cli::usage_para::none);
+
+    // Implementation details.
+    //
+    protected:
+    bool
+    _parse (const char*, ::bpkg::cli::scanner&);
+
+    private:
+    bool
+    _parse (::bpkg::cli::scanner&,
+            ::bpkg::cli::unknown_mode option,
+            ::bpkg::cli::unknown_mode argument);
+
+    public:
+    string name_;
+    bool name_specified_;
+    bool relative_;
+  };
+}
+
+// Print page usage information.
+//
+namespace bpkg
+{
+  ::bpkg::cli::usage_para
+  print_bpkg_cfg_link_usage (::std::ostream&,
+                             ::bpkg::cli::usage_para = ::bpkg::cli::usage_para::none);
+}
+
+#include <bpkg/cfg-link-options.ixx>
+
+// Begin epilogue.
+//
+//
+// End epilogue.
+
+#endif // BPKG_CFG_LINK_OPTIONS_HXX
diff --git a/bpkg/cfg-link-options.ixx b/bpkg/cfg-link-options.ixx
new file mode 100644
index 0000000..685f89e
--- /dev/null
+++ b/bpkg/cfg-link-options.ixx
@@ -0,0 +1,39 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+// Begin prologue.
+//
+//
+// End prologue.
+
+namespace bpkg
+{
+  // cfg_link_options
+  //
+
+  inline const string& cfg_link_options::
+  name () const
+  {
+    return this->name_;
+  }
+
+  inline bool cfg_link_options::
+  name_specified () const
+  {
+    return this->name_specified_;
+  }
+
+  inline const bool& cfg_link_options::
+  relative () const
+  {
+    return this->relative_;
+  }
+}
+
+// Begin epilogue.
+//
+//
+// End epilogue.
diff --git a/bpkg/cfg-unlink-options.cxx b/bpkg/cfg-unlink-options.cxx
new file mode 100644
index 0000000..31c7f92
--- /dev/null
+++ b/bpkg/cfg-unlink-options.cxx
@@ -0,0 +1,643 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+// Begin prologue.
+//
+#include <bpkg/types-parsers.hxx>
+//
+// End prologue.
+
+#include <bpkg/cfg-unlink-options.hxx>
+
+#include <map>
+#include <set>
+#include <string>
+#include <vector>
+#include <utility>
+#include <ostream>
+#include <sstream>
+
+namespace bpkg
+{
+  namespace cli
+  {
+    template <typename X>
+    struct parser
+    {
+      static void
+      parse (X& x, bool& xs, scanner& s)
+      {
+        using namespace std;
+
+        const char* o (s.next ());
+        if (s.more ())
+        {
+          string v (s.next ());
+          istringstream is (v);
+          if (!(is >> x && is.peek () == istringstream::traits_type::eof ()))
+            throw invalid_value (o, v);
+        }
+        else
+          throw missing_value (o);
+
+        xs = true;
+      }
+
+      static void
+      merge (X& b, const X& a)
+      {
+        b = a;
+      }
+    };
+
+    template <>
+    struct parser<bool>
+    {
+      static void
+      parse (bool& x, scanner& s)
+      {
+        s.next ();
+        x = true;
+      }
+
+      static void
+      merge (bool& b, const bool&)
+      {
+        b = true;
+      }
+    };
+
+    template <>
+    struct parser<std::string>
+    {
+      static void
+      parse (std::string& x, bool& xs, scanner& s)
+      {
+        const char* o (s.next ());
+
+        if (s.more ())
+          x = s.next ();
+        else
+          throw missing_value (o);
+
+        xs = true;
+      }
+
+      static void
+      merge (std::string& b, const std::string& a)
+      {
+        b = a;
+      }
+    };
+
+    template <typename X>
+    struct parser<std::pair<X, std::size_t> >
+    {
+      static void
+      parse (std::pair<X, std::size_t>& x, bool& xs, scanner& s)
+      {
+        x.second = s.position ();
+        parser<X>::parse (x.first, xs, s);
+      }
+
+      static void
+      merge (std::pair<X, std::size_t>& b, const std::pair<X, std::size_t>& a)
+      {
+        b = a;
+      }
+    };
+
+    template <typename X>
+    struct parser<std::vector<X> >
+    {
+      static void
+      parse (std::vector<X>& c, bool& xs, scanner& s)
+      {
+        X x;
+        bool dummy;
+        parser<X>::parse (x, dummy, s);
+        c.push_back (x);
+        xs = true;
+      }
+
+      static void
+      merge (std::vector<X>& b, const std::vector<X>& a)
+      {
+        b.insert (b.end (), a.begin (), a.end ());
+      }
+    };
+
+    template <typename X, typename C>
+    struct parser<std::set<X, C> >
+    {
+      static void
+      parse (std::set<X, C>& c, bool& xs, scanner& s)
+      {
+        X x;
+        bool dummy;
+        parser<X>::parse (x, dummy, s);
+        c.insert (x);
+        xs = true;
+      }
+
+      static void
+      merge (std::set<X, C>& b, const std::set<X, C>& a)
+      {
+        b.insert (a.begin (), a.end ());
+      }
+    };
+
+    template <typename K, typename V, typename C>
+    struct parser<std::map<K, V, C> >
+    {
+      static void
+      parse (std::map<K, V, C>& m, bool& xs, scanner& s)
+      {
+        const char* o (s.next ());
+
+        if (s.more ())
+        {
+          std::size_t pos (s.position ());
+          std::string ov (s.next ());
+          std::string::size_type p = ov.find ('=');
+
+          K k = K ();
+          V v = V ();
+          std::string kstr (ov, 0, p);
+          std::string vstr (ov, (p != std::string::npos ? p + 1 : ov.size ()));
+
+          int ac (2);
+          char* av[] =
+          {
+            const_cast<char*> (o),
+            0
+          };
+
+          bool dummy;
+          if (!kstr.empty ())
+          {
+            av[1] = const_cast<char*> (kstr.c_str ());
+            argv_scanner s (0, ac, av, false, pos);
+            parser<K>::parse (k, dummy, s);
+          }
+
+          if (!vstr.empty ())
+          {
+            av[1] = const_cast<char*> (vstr.c_str ());
+            argv_scanner s (0, ac, av, false, pos);
+            parser<V>::parse (v, dummy, s);
+          }
+
+          m[k] = v;
+        }
+        else
+          throw missing_value (o);
+
+        xs = true;
+      }
+
+      static void
+      merge (std::map<K, V, C>& b, const std::map<K, V, C>& a)
+      {
+        for (typename std::map<K, V, C>::const_iterator i (a.begin ()); 
+             i != a.end (); 
+             ++i)
+          b[i->first] = i->second;
+      }
+    };
+
+    template <typename X, typename T, T X::*M>
+    void
+    thunk (X& x, scanner& s)
+    {
+      parser<T>::parse (x.*M, s);
+    }
+
+    template <typename X, typename T, T X::*M, bool X::*S>
+    void
+    thunk (X& x, scanner& s)
+    {
+      parser<T>::parse (x.*M, x.*S, s);
+    }
+  }
+}
+
+#include <map>
+#include <cstring>
+
+namespace bpkg
+{
+  // cfg_unlink_options
+  //
+
+  cfg_unlink_options::
+  cfg_unlink_options ()
+  : name_ (),
+    name_specified_ (false),
+    id_ (),
+    id_specified_ (false),
+    uuid_ (),
+    uuid_specified_ (false),
+    dangling_ ()
+  {
+  }
+
+  bool cfg_unlink_options::
+  parse (int& argc,
+         char** argv,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  bool cfg_unlink_options::
+  parse (int start,
+         int& argc,
+         char** argv,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (start, argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  bool cfg_unlink_options::
+  parse (int& argc,
+         char** argv,
+         int& end,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    end = s.end ();
+    return r;
+  }
+
+  bool cfg_unlink_options::
+  parse (int start,
+         int& argc,
+         char** argv,
+         int& end,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (start, argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    end = s.end ();
+    return r;
+  }
+
+  bool cfg_unlink_options::
+  parse (::bpkg::cli::scanner& s,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  void cfg_unlink_options::
+  merge (const cfg_unlink_options& a)
+  {
+    CLI_POTENTIALLY_UNUSED (a);
+
+    // configuration_options base
+    //
+    ::bpkg::configuration_options::merge (a);
+
+    if (a.name_specified_)
+    {
+      ::bpkg::cli::parser< string>::merge (
+        this->name_, a.name_);
+      this->name_specified_ = true;
+    }
+
+    if (a.id_specified_)
+    {
+      ::bpkg::cli::parser< uint64_t>::merge (
+        this->id_, a.id_);
+      this->id_specified_ = true;
+    }
+
+    if (a.uuid_specified_)
+    {
+      ::bpkg::cli::parser< uuid_type>::merge (
+        this->uuid_, a.uuid_);
+      this->uuid_specified_ = true;
+    }
+
+    if (a.dangling_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->dangling_, a.dangling_);
+    }
+  }
+
+  ::bpkg::cli::usage_para cfg_unlink_options::
+  print_usage (::std::ostream& os, ::bpkg::cli::usage_para p)
+  {
+    CLI_POTENTIALLY_UNUSED (os);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mCFG-UNLINK OPTIONS\033[0m" << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--name\033[0m \033[4mname\033[0m              Name of the configuration to unlink." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--id\033[0m \033[4mid\033[0m                  Numeric id of the configuration to unlink." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--uuid\033[0m \033[4muuid\033[0m              UUID of the configuration to unlink." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--dangling\033[0m               Remove dangling implicit backlinks." << ::std::endl;
+
+    p = ::bpkg::cli::usage_para::option;
+
+    // configuration_options base
+    //
+    p = ::bpkg::configuration_options::print_usage (os, p);
+
+    return p;
+  }
+
+  typedef
+  std::map<std::string, void (*) (cfg_unlink_options&, ::bpkg::cli::scanner&)>
+  _cli_cfg_unlink_options_map;
+
+  static _cli_cfg_unlink_options_map _cli_cfg_unlink_options_map_;
+
+  struct _cli_cfg_unlink_options_map_init
+  {
+    _cli_cfg_unlink_options_map_init ()
+    {
+      _cli_cfg_unlink_options_map_["--name"] =
+      &::bpkg::cli::thunk< cfg_unlink_options, string, &cfg_unlink_options::name_,
+        &cfg_unlink_options::name_specified_ >;
+      _cli_cfg_unlink_options_map_["--id"] =
+      &::bpkg::cli::thunk< cfg_unlink_options, uint64_t, &cfg_unlink_options::id_,
+        &cfg_unlink_options::id_specified_ >;
+      _cli_cfg_unlink_options_map_["--uuid"] =
+      &::bpkg::cli::thunk< cfg_unlink_options, uuid_type, &cfg_unlink_options::uuid_,
+        &cfg_unlink_options::uuid_specified_ >;
+      _cli_cfg_unlink_options_map_["--dangling"] =
+      &::bpkg::cli::thunk< cfg_unlink_options, bool, &cfg_unlink_options::dangling_ >;
+    }
+  };
+
+  static _cli_cfg_unlink_options_map_init _cli_cfg_unlink_options_map_init_;
+
+  bool cfg_unlink_options::
+  _parse (const char* o, ::bpkg::cli::scanner& s)
+  {
+    _cli_cfg_unlink_options_map::const_iterator i (_cli_cfg_unlink_options_map_.find (o));
+
+    if (i != _cli_cfg_unlink_options_map_.end ())
+    {
+      (*(i->second)) (*this, s);
+      return true;
+    }
+
+    // configuration_options base
+    //
+    if (::bpkg::configuration_options::_parse (o, s))
+      return true;
+
+    return false;
+  }
+
+  bool cfg_unlink_options::
+  _parse (::bpkg::cli::scanner& s,
+          ::bpkg::cli::unknown_mode opt_mode,
+          ::bpkg::cli::unknown_mode arg_mode)
+  {
+    // Can't skip combined flags (--no-combined-flags).
+    //
+    assert (opt_mode != ::bpkg::cli::unknown_mode::skip);
+
+    bool r = false;
+    bool opt = true;
+
+    while (s.more ())
+    {
+      const char* o = s.peek ();
+
+      if (std::strcmp (o, "--") == 0)
+      {
+        opt = false;
+      }
+
+      if (opt)
+      {
+        if (_parse (o, s))
+        {
+          r = true;
+          continue;
+        }
+
+        if (std::strncmp (o, "-", 1) == 0 && o[1] != '\0')
+        {
+          // Handle combined option values.
+          //
+          std::string co;
+          if (const char* v = std::strchr (o, '='))
+          {
+            co.assign (o, 0, v - o);
+            ++v;
+
+            int ac (2);
+            char* av[] =
+            {
+              const_cast<char*> (co.c_str ()),
+              const_cast<char*> (v)
+            };
+
+            ::bpkg::cli::argv_scanner ns (0, ac, av);
+
+            if (_parse (co.c_str (), ns))
+            {
+              // Parsed the option but not its value?
+              //
+              if (ns.end () != 2)
+                throw ::bpkg::cli::invalid_value (co, v);
+
+              s.next ();
+              r = true;
+              continue;
+            }
+            else
+            {
+              // Set the unknown option and fall through.
+              //
+              o = co.c_str ();
+            }
+          }
+
+          // Handle combined flags.
+          //
+          char cf[3];
+          {
+            const char* p = o + 1;
+            for (; *p != '\0'; ++p)
+            {
+              if (!((*p >= 'a' && *p <= 'z') ||
+                    (*p >= 'A' && *p <= 'Z') ||
+                    (*p >= '0' && *p <= '9')))
+                break;
+            }
+
+            if (*p == '\0')
+            {
+              for (p = o + 1; *p != '\0'; ++p)
+              {
+                std::strcpy (cf, "-");
+                cf[1] = *p;
+                cf[2] = '\0';
+
+                int ac (1);
+                char* av[] =
+                {
+                  cf
+                };
+
+                ::bpkg::cli::argv_scanner ns (0, ac, av);
+
+                if (!_parse (cf, ns))
+                  break;
+              }
+
+              if (*p == '\0')
+              {
+                // All handled.
+                //
+                s.next ();
+                r = true;
+                continue;
+              }
+              else
+              {
+                // Set the unknown option and fall through.
+                //
+                o = cf;
+              }
+            }
+          }
+
+          switch (opt_mode)
+          {
+            case ::bpkg::cli::unknown_mode::skip:
+            {
+              s.skip ();
+              r = true;
+              continue;
+            }
+            case ::bpkg::cli::unknown_mode::stop:
+            {
+              break;
+            }
+            case ::bpkg::cli::unknown_mode::fail:
+            {
+              throw ::bpkg::cli::unknown_option (o);
+            }
+          }
+
+          break;
+        }
+      }
+
+      switch (arg_mode)
+      {
+        case ::bpkg::cli::unknown_mode::skip:
+        {
+          s.skip ();
+          r = true;
+          continue;
+        }
+        case ::bpkg::cli::unknown_mode::stop:
+        {
+          break;
+        }
+        case ::bpkg::cli::unknown_mode::fail:
+        {
+          throw ::bpkg::cli::unknown_argument (o);
+        }
+      }
+
+      break;
+    }
+
+    return r;
+  }
+}
+
+namespace bpkg
+{
+  ::bpkg::cli::usage_para
+  print_bpkg_cfg_unlink_usage (::std::ostream& os, ::bpkg::cli::usage_para p)
+  {
+    CLI_POTENTIALLY_UNUSED (os);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mSYNOPSIS\033[0m" << ::std::endl
+       << ::std::endl
+       << "\033[1mbpkg cfg-unlink\033[0m [\033[4moptions\033[0m] [\033[4mdir\033[0m]" << ::std::endl
+       << "\033[1mbpkg cfg-unlink\033[0m [\033[4moptions\033[0m] \033[1m--dangling\033[0m\033[0m" << ::std::endl
+       << ::std::endl
+       << "\033[1mDESCRIPTION\033[0m" << ::std::endl
+       << ::std::endl
+       << "The \033[1mcfg-unlink\033[0m command unlinks the specified \033[1mbpkg\033[0m configuration from the" << ::std::endl
+       << "current configuration (the first form) or removes dangling implicit backlinks" << ::std::endl
+       << "(the second form). See \033[1mbpkg-cfg-create(1)\033[0m for background on linked" << ::std::endl
+       << "configurations." << ::std::endl
+       << ::std::endl
+       << "In the first form the configuration to unlink can be specified either as" << ::std::endl
+       << "configuration directory (\033[4mdir\033[0m), name (\033[1m--name\033[0m), id (\033[1m--id\033[0m), or UUID (\033[1m--uuid\033[0m)." << ::std::endl;
+
+    p = ::bpkg::cfg_unlink_options::print_usage (os, ::bpkg::cli::usage_para::text);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mDEFAULT OPTIONS FILES\033[0m" << ::std::endl
+       << ::std::endl
+       << "See \033[1mbpkg-default-options-files(1)\033[0m for an overview of the default options files." << ::std::endl
+       << "For the \033[1mcfg-unlink\033[0m command the search start directory is the configuration" << ::std::endl
+       << "directory. The following options files are searched for in each directory and," << ::std::endl
+       << "if found, loaded in the order listed:" << ::std::endl
+       << ::std::endl
+       << "bpkg.options" << ::std::endl
+       << "bpkg-cfg-unlink.options" << ::std::endl
+       << ::std::endl
+       << "The following \033[1mcfg-unlink\033[0m command options cannot be specified in the default" << ::std::endl
+       << "options files:" << ::std::endl
+       << ::std::endl
+       << "--directory|-d" << ::std::endl;
+
+    p = ::bpkg::cli::usage_para::text;
+
+    return p;
+  }
+}
+
+// Begin epilogue.
+//
+//
+// End epilogue.
+
diff --git a/bpkg/cfg-unlink-options.hxx b/bpkg/cfg-unlink-options.hxx
new file mode 100644
index 0000000..14c9aa4
--- /dev/null
+++ b/bpkg/cfg-unlink-options.hxx
@@ -0,0 +1,137 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+#ifndef BPKG_CFG_UNLINK_OPTIONS_HXX
+#define BPKG_CFG_UNLINK_OPTIONS_HXX
+
+// Begin prologue.
+//
+//
+// End prologue.
+
+#include <bpkg/configuration-options.hxx>
+
+namespace bpkg
+{
+  class cfg_unlink_options: public ::bpkg::configuration_options
+  {
+    public:
+    cfg_unlink_options ();
+
+    // Return true if anything has been parsed.
+    //
+    bool
+    parse (int& argc,
+           char** argv,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int start,
+           int& argc,
+           char** argv,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int& argc,
+           char** argv,
+           int& end,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int start,
+           int& argc,
+           char** argv,
+           int& end,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (::bpkg::cli::scanner&,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    // Merge options from the specified instance appending/overriding
+    // them as if they appeared after options in this instance.
+    //
+    void
+    merge (const cfg_unlink_options&);
+
+    // Option accessors.
+    //
+    const string&
+    name () const;
+
+    bool
+    name_specified () const;
+
+    const uint64_t&
+    id () const;
+
+    bool
+    id_specified () const;
+
+    const uuid_type&
+    uuid () const;
+
+    bool
+    uuid_specified () const;
+
+    const bool&
+    dangling () const;
+
+    // Print usage information.
+    //
+    static ::bpkg::cli::usage_para
+    print_usage (::std::ostream&,
+                 ::bpkg::cli::usage_para = ::bpkg::cli::usage_para::none);
+
+    // Implementation details.
+    //
+    protected:
+    bool
+    _parse (const char*, ::bpkg::cli::scanner&);
+
+    private:
+    bool
+    _parse (::bpkg::cli::scanner&,
+            ::bpkg::cli::unknown_mode option,
+            ::bpkg::cli::unknown_mode argument);
+
+    public:
+    string name_;
+    bool name_specified_;
+    uint64_t id_;
+    bool id_specified_;
+    uuid_type uuid_;
+    bool uuid_specified_;
+    bool dangling_;
+  };
+}
+
+// Print page usage information.
+//
+namespace bpkg
+{
+  ::bpkg::cli::usage_para
+  print_bpkg_cfg_unlink_usage (::std::ostream&,
+                               ::bpkg::cli::usage_para = ::bpkg::cli::usage_para::none);
+}
+
+#include <bpkg/cfg-unlink-options.ixx>
+
+// Begin epilogue.
+//
+//
+// End epilogue.
+
+#endif // BPKG_CFG_UNLINK_OPTIONS_HXX
diff --git a/bpkg/cfg-unlink-options.ixx b/bpkg/cfg-unlink-options.ixx
new file mode 100644
index 0000000..7d9d63c
--- /dev/null
+++ b/bpkg/cfg-unlink-options.ixx
@@ -0,0 +1,63 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+// Begin prologue.
+//
+//
+// End prologue.
+
+namespace bpkg
+{
+  // cfg_unlink_options
+  //
+
+  inline const string& cfg_unlink_options::
+  name () const
+  {
+    return this->name_;
+  }
+
+  inline bool cfg_unlink_options::
+  name_specified () const
+  {
+    return this->name_specified_;
+  }
+
+  inline const uint64_t& cfg_unlink_options::
+  id () const
+  {
+    return this->id_;
+  }
+
+  inline bool cfg_unlink_options::
+  id_specified () const
+  {
+    return this->id_specified_;
+  }
+
+  inline const uuid_type& cfg_unlink_options::
+  uuid () const
+  {
+    return this->uuid_;
+  }
+
+  inline bool cfg_unlink_options::
+  uuid_specified () const
+  {
+    return this->uuid_specified_;
+  }
+
+  inline const bool& cfg_unlink_options::
+  dangling () const
+  {
+    return this->dangling_;
+  }
+}
+
+// Begin epilogue.
+//
+//
+// End epilogue.
diff --git a/bpkg/common-options.cxx b/bpkg/common-options.cxx
new file mode 100644
index 0000000..dedb6de
--- /dev/null
+++ b/bpkg/common-options.cxx
@@ -0,0 +1,2002 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+// Begin prologue.
+//
+#include <bpkg/types-parsers.hxx>
+//
+// End prologue.
+
+#include <bpkg/common-options.hxx>
+
+#include <map>
+#include <set>
+#include <string>
+#include <vector>
+#include <utility>
+#include <ostream>
+#include <sstream>
+#include <cstring>
+#include <fstream>
+
+namespace bpkg
+{
+  namespace cli
+  {
+    // unknown_option
+    //
+    unknown_option::
+    ~unknown_option () throw ()
+    {
+    }
+
+    void unknown_option::
+    print (::std::ostream& os) const
+    {
+      os << "unknown option '" << option ().c_str () << "'";
+    }
+
+    const char* unknown_option::
+    what () const throw ()
+    {
+      return "unknown option";
+    }
+
+    // unknown_argument
+    //
+    unknown_argument::
+    ~unknown_argument () throw ()
+    {
+    }
+
+    void unknown_argument::
+    print (::std::ostream& os) const
+    {
+      os << "unknown argument '" << argument ().c_str () << "'";
+    }
+
+    const char* unknown_argument::
+    what () const throw ()
+    {
+      return "unknown argument";
+    }
+
+    // missing_value
+    //
+    missing_value::
+    ~missing_value () throw ()
+    {
+    }
+
+    void missing_value::
+    print (::std::ostream& os) const
+    {
+      os << "missing value for option '" << option ().c_str () << "'";
+    }
+
+    const char* missing_value::
+    what () const throw ()
+    {
+      return "missing option value";
+    }
+
+    // invalid_value
+    //
+    invalid_value::
+    ~invalid_value () throw ()
+    {
+    }
+
+    void invalid_value::
+    print (::std::ostream& os) const
+    {
+      os << "invalid value '" << value ().c_str () << "' for option '"
+         << option ().c_str () << "'";
+
+      if (!message ().empty ())
+        os << ": " << message ().c_str ();
+    }
+
+    const char* invalid_value::
+    what () const throw ()
+    {
+      return "invalid option value";
+    }
+
+    // eos_reached
+    //
+    void eos_reached::
+    print (::std::ostream& os) const
+    {
+      os << what ();
+    }
+
+    const char* eos_reached::
+    what () const throw ()
+    {
+      return "end of argument stream reached";
+    }
+
+    // file_io_failure
+    //
+    file_io_failure::
+    ~file_io_failure () throw ()
+    {
+    }
+
+    void file_io_failure::
+    print (::std::ostream& os) const
+    {
+      os << "unable to open file '" << file ().c_str () << "' or read failure";
+    }
+
+    const char* file_io_failure::
+    what () const throw ()
+    {
+      return "unable to open file or read failure";
+    }
+
+    // unmatched_quote
+    //
+    unmatched_quote::
+    ~unmatched_quote () throw ()
+    {
+    }
+
+    void unmatched_quote::
+    print (::std::ostream& os) const
+    {
+      os << "unmatched quote in argument '" << argument ().c_str () << "'";
+    }
+
+    const char* unmatched_quote::
+    what () const throw ()
+    {
+      return "unmatched quote";
+    }
+
+    // unexpected_group
+    //
+    unexpected_group::
+    ~unexpected_group () throw ()
+    {
+    }
+
+    void unexpected_group::
+    print (::std::ostream& os) const
+    {
+      os << "unexpected grouped argument '" << group_ << "' "
+         << "for argument '" << argument_ << "'";
+    }
+
+    const char* unexpected_group::
+    what () const throw ()
+    {
+      return "unexpected grouped argument";
+    }
+
+    // group_separator
+    //
+    group_separator::
+    ~group_separator () throw ()
+    {
+    }
+
+    void group_separator::
+    print (::std::ostream& os) const
+    {
+      bool ex (!expected_.empty ());
+      bool en (!encountered_.empty ());
+
+      if (ex)
+      {
+        os << "expected group separator '" << expected_ << "'";
+        if (en)
+          os << " instead of '" << encountered_ << "'";
+      }
+      else
+        os << "unexpected group separator '" << encountered_ << "'";
+
+      if (en)
+        os << ", use '\\" << encountered_ << "' to escape";
+    }
+
+    const char* group_separator::
+    what () const throw ()
+    {
+      bool ex (!expected_.empty ());
+      bool en (!encountered_.empty ());
+
+      return en
+        ? ex ? "wrong group separator"    : "unexpected group separator"
+        : ex ? "expected group separator" : "";
+    }
+
+    // scanner
+    //
+    scanner::
+    ~scanner ()
+    {
+    }
+
+    // argv_scanner
+    //
+    bool argv_scanner::
+    more ()
+    {
+      return i_ < argc_;
+    }
+
+    const char* argv_scanner::
+    peek ()
+    {
+      if (i_ < argc_)
+        return argv_[i_];
+      else
+        throw eos_reached ();
+    }
+
+    const char* argv_scanner::
+    next ()
+    {
+      if (i_ < argc_)
+      {
+        const char* r (argv_[i_]);
+
+        if (erase_)
+        {
+          for (int i (i_ + 1); i < argc_; ++i)
+            argv_[i - 1] = argv_[i];
+
+          --argc_;
+          argv_[argc_] = 0;
+        }
+        else
+          ++i_;
+
+        ++start_position_;
+        return r;
+      }
+      else
+        throw eos_reached ();
+    }
+
+    void argv_scanner::
+    skip ()
+    {
+      if (i_ < argc_)
+      {
+        ++i_;
+        ++start_position_;
+      }
+      else
+        throw eos_reached ();
+    }
+
+    std::size_t argv_scanner::
+    position ()
+    {
+      return start_position_;
+    }
+
+    // vector_scanner
+    //
+    bool vector_scanner::
+    more ()
+    {
+      return i_ < v_.size ();
+    }
+
+    const char* vector_scanner::
+    peek ()
+    {
+      if (i_ < v_.size ())
+        return v_[i_].c_str ();
+      else
+        throw eos_reached ();
+    }
+
+    const char* vector_scanner::
+    next ()
+    {
+      if (i_ < v_.size ())
+        return v_[i_++].c_str ();
+      else
+        throw eos_reached ();
+    }
+
+    void vector_scanner::
+    skip ()
+    {
+      if (i_ < v_.size ())
+        ++i_;
+      else
+        throw eos_reached ();
+    }
+
+    std::size_t vector_scanner::
+    position ()
+    {
+      return start_position_ + i_;
+    }
+
+    // argv_file_scanner
+    //
+    int argv_file_scanner::zero_argc_ = 0;
+    std::string argv_file_scanner::empty_string_;
+
+    bool argv_file_scanner::
+    more ()
+    {
+      if (!args_.empty ())
+        return true;
+
+      while (base::more ())
+      {
+        // See if the next argument is the file option.
+        //
+        const char* a (base::peek ());
+        const option_info* oi = 0;
+        const char* ov = 0;
+
+        if (!skip_)
+        {
+          if ((oi = find (a)) != 0)
+          {
+            base::next ();
+
+            if (!base::more ())
+              throw missing_value (a);
+
+            ov = base::next ();
+          }
+          else if (std::strncmp (a, "-", 1) == 0)
+          {
+            if ((ov = std::strchr (a, '=')) != 0)
+            {
+              std::string o (a, 0, ov - a);
+              if ((oi = find (o.c_str ())) != 0)
+              {
+                base::next ();
+                ++ov;
+              }
+            }
+          }
+        }
+
+        if (oi != 0)
+        {
+          if (oi->search_func != 0)
+          {
+            std::string f (oi->search_func (ov, oi->arg));
+
+            if (!f.empty ())
+              load (f);
+          }
+          else
+            load (ov);
+
+          if (!args_.empty ())
+            return true;
+        }
+        else
+        {
+          if (!skip_)
+            skip_ = (std::strcmp (a, "--") == 0);
+
+          return true;
+        }
+      }
+
+      return false;
+    }
+
+    const char* argv_file_scanner::
+    peek ()
+    {
+      if (!more ())
+        throw eos_reached ();
+
+      return args_.empty () ? base::peek () : args_.front ().value.c_str ();
+    }
+
+    const std::string& argv_file_scanner::
+    peek_file ()
+    {
+      if (!more ())
+        throw eos_reached ();
+
+      return args_.empty () ? empty_string_ : *args_.front ().file;
+    }
+
+    std::size_t argv_file_scanner::
+    peek_line ()
+    {
+      if (!more ())
+        throw eos_reached ();
+
+      return args_.empty () ? 0 : args_.front ().line;
+    }
+
+    const char* argv_file_scanner::
+    next ()
+    {
+      if (!more ())
+        throw eos_reached ();
+
+      if (args_.empty ())
+        return base::next ();
+      else
+      {
+        hold_[i_ == 0 ? ++i_ : --i_].swap (args_.front ().value);
+        args_.pop_front ();
+        ++start_position_;
+        return hold_[i_].c_str ();
+      }
+    }
+
+    void argv_file_scanner::
+    skip ()
+    {
+      if (!more ())
+        throw eos_reached ();
+
+      if (args_.empty ())
+        return base::skip ();
+      else
+      {
+        args_.pop_front ();
+        ++start_position_;
+      }
+    }
+
+    const argv_file_scanner::option_info* argv_file_scanner::
+    find (const char* a) const
+    {
+      for (std::size_t i (0); i < options_count_; ++i)
+        if (std::strcmp (a, options_[i].option) == 0)
+          return &options_[i];
+
+      return 0;
+    }
+
+    std::size_t argv_file_scanner::
+    position ()
+    {
+      return start_position_;
+    }
+
+    void argv_file_scanner::
+    load (const std::string& file)
+    {
+      using namespace std;
+
+      ifstream is (file.c_str ());
+
+      if (!is.is_open ())
+        throw file_io_failure (file);
+
+      files_.push_back (file);
+
+      arg a;
+      a.file = &*files_.rbegin ();
+
+      for (a.line = 1; !is.eof (); ++a.line)
+      {
+        string line;
+        getline (is, line);
+
+        if (is.fail () && !is.eof ())
+          throw file_io_failure (file);
+
+        string::size_type n (line.size ());
+
+        // Trim the line from leading and trailing whitespaces.
+        //
+        if (n != 0)
+        {
+          const char* f (line.c_str ());
+          const char* l (f + n);
+
+          const char* of (f);
+          while (f < l && (*f == ' ' || *f == '\t' || *f == '\r'))
+            ++f;
+
+          --l;
+
+          const char* ol (l);
+          while (l > f && (*l == ' ' || *l == '\t' || *l == '\r'))
+            --l;
+
+          if (f != of || l != ol)
+            line = f <= l ? string (f, l - f + 1) : string ();
+        }
+
+        // Ignore empty lines, those that start with #.
+        //
+        if (line.empty () || line[0] == '#')
+          continue;
+
+        string::size_type p (string::npos);
+        if (line.compare (0, 1, "-") == 0)
+        {
+          p = line.find (' ');
+
+          string::size_type q (line.find ('='));
+          if (q != string::npos && q < p)
+            p = q;
+        }
+
+        string s1;
+        if (p != string::npos)
+        {
+          s1.assign (line, 0, p);
+
+          // Skip leading whitespaces in the argument.
+          //
+          if (line[p] == '=')
+            ++p;
+          else
+          {
+            n = line.size ();
+            for (++p; p < n; ++p)
+            {
+              char c (line[p]);
+              if (c != ' ' && c != '\t' && c != '\r')
+                break;
+            }
+          }
+        }
+        else if (!skip_)
+          skip_ = (line == "--");
+
+        string s2 (line, p != string::npos ? p : 0);
+
+        // If the string (which is an option value or argument) is
+        // wrapped in quotes, remove them.
+        //
+        n = s2.size ();
+        char cf (s2[0]), cl (s2[n - 1]);
+
+        if (cf == '"' || cf == '\'' || cl == '"' || cl == '\'')
+        {
+          if (n == 1 || cf != cl)
+            throw unmatched_quote (s2);
+
+          s2 = string (s2, 1, n - 2);
+        }
+
+        if (!s1.empty ())
+        {
+          // See if this is another file option.
+          //
+          const option_info* oi;
+          if (!skip_ && (oi = find (s1.c_str ())))
+          {
+            if (s2.empty ())
+              throw missing_value (oi->option);
+
+            if (oi->search_func != 0)
+            {
+              string f (oi->search_func (s2.c_str (), oi->arg));
+              if (!f.empty ())
+                load (f);
+            }
+            else
+            {
+              // If the path of the file being parsed is not simple and the
+              // path of the file that needs to be loaded is relative, then
+              // complete the latter using the former as a base.
+              //
+#ifndef _WIN32
+              string::size_type p (file.find_last_of ('/'));
+              bool c (p != string::npos && s2[0] != '/');
+#else
+              string::size_type p (file.find_last_of ("/\\"));
+              bool c (p != string::npos && s2[1] != ':');
+#endif
+              if (c)
+                s2.insert (0, file, 0, p + 1);
+
+              load (s2);
+            }
+
+            continue;
+          }
+
+          a.value = s1;
+          args_.push_back (a);
+        }
+
+        a.value = s2;
+        args_.push_back (a);
+      }
+    }
+
+    // group_scanner
+    //
+    bool group_scanner::
+    more ()
+    {
+      // We don't want to call scan_group() here since that
+      // would invalidate references to previous arguments.
+      // But we do need to check that the previous group was
+      // handled.
+      //
+      if (state_ == scanned)
+      {
+        if (group_scan_.end () != group_.size ())
+          throw unexpected_group (arg_[i_][j_], group_scan_.next ());
+      }
+
+      return j_ != 0 || scan_.more ();
+    }
+
+    const char* group_scanner::
+    peek ()
+    {
+      if (state_ != peeked)
+      {
+        scan_group ();
+        state_ = peeked;
+      }
+
+      // Return unescaped.
+      return arg_[i_][j_ - 1].c_str ();
+    }
+
+    const char* group_scanner::
+    next ()
+    {
+      if (state_ != peeked)
+        scan_group ();
+      state_ = scanned;
+      // Return unescaped.
+      return arg_[i_][--j_].c_str ();
+    }
+
+    void group_scanner::
+    skip ()
+    {
+      if (state_ != peeked)
+        scan_group ();
+      state_ = skipped;
+      --j_;
+    }
+
+    std::size_t group_scanner::
+    position ()
+    {
+      return j_ == 0 ? scan_.position () : pos_ + (arg_[i_].size () - j_);
+    }
+
+    void group_scanner::
+    scan_group ()
+    {
+      // If the previous argument has been scanned, then make
+      // sure the group has been scanned (handled) as well.
+      //
+      if (state_ == scanned)
+      {
+        if (group_scan_.end () != group_.size ())
+          throw unexpected_group (arg_[i_][j_], group_scan_.next ());
+      }
+
+      // If we still have arguments in the pack, rewind the group.
+      //
+      if (j_ != 0)
+      {
+        group_scan_.reset ();
+        return;
+      }
+
+      i_ += (i_ == 0 ? 1 : -1);
+      group_.clear ();
+      group_scan_.reset ();
+      pos_ = scan_.position ();
+
+      // Note: using group_ won't cover empty groups and using
+      // j_ won't cover single-argument packs.
+      //
+      bool group (false), pack (false);
+
+      do
+      {
+        const char* a (scan_.next ());
+        size_t i (*a == '\\' ? 1 : 0);
+        separator s (sense (a + i));
+
+        if (s == none || i != 0)
+        {
+          if (arg_[i_].size () != 1)
+            arg_[i_].resize (1);
+
+          arg_[i_][0] = a + (s != none ? i : 0);
+          j_ = 1;
+          break;
+        }
+
+        // Start of a leading group for the next argument or
+        // argument pack. We will only know which once we see
+        // the closing separator.
+        //
+        if (s != open)
+          throw group_separator (a, "");
+
+        size_t n (group_.size ());
+
+        // Scan the group until the closing separator.
+        //
+        s = none;
+        while (s == none && scan_.more ())
+        {
+          a = scan_.next ();
+          i = (*a == '\\' ? 1 : 0);
+          s = sense (a + i);
+
+          if (s == none || i != 0)
+          {
+            group_.push_back (a + (s != none ? i : 0));
+            s = none;
+          }
+        }
+
+        if (s == close)
+        {
+          size_t m (group_.size ());
+
+          j_ = m - n;
+          if (j_ == 0)
+            throw group_separator ("{", "");
+
+          if (arg_[i_].size () != j_)
+            arg_[i_].resize (j_);
+
+          // Move from group_ to arg_. Add in reverse for ease 
+          // of iteration.
+          //
+          for (size_t j (0); j != j_; ++j)
+            arg_[i_][j] = group_[m - j - 1];
+          group_.resize (n);
+
+          pack = true;
+          break;
+        }
+        else if (s == close_plus)
+          group = true;
+        else
+          throw group_separator ((s != none ? a : ""), "}+");
+      }
+      while (scan_.more ());
+
+      // Handle the case where we have seen the leading group
+      // but there are no more arguments.
+      //
+      if (group && j_ == 0)
+        throw group_separator ("{", "");
+
+      // Handle trailing groups, if any.
+      //
+      while (scan_.more ())
+      {
+        const char* a (scan_.peek ());
+        size_t i (*a == '\\' ? 1 : 0);
+        separator s (sense (a + i));
+
+        // Next argument, argument pack, or leading group.
+        //
+        if (s == none || s == open || i != 0)
+          break;
+
+        if (s != open_plus)
+          throw group_separator (a, "");
+
+        group = true;
+
+        // Scan the group until the closing separator.
+        //
+        scan_.next ();
+        s = none;
+        while (s == none && scan_.more ())
+        {
+          a = scan_.next ();
+          i = (*a == '\\' ? 1 : 0);
+          s = sense (a + i);
+
+          if (s == none || i != 0)
+          {
+            group_.push_back (a + (s != none ? i : 0));
+            s = none;
+          }
+        }
+
+        if (s != close)
+          throw group_separator ((s != none ? a : ""), "}");
+      }
+
+      // Handle the case where we have seen the argument pack
+      // without leading or trailing group.
+      //
+      if (pack && !group)
+        throw group_separator ("{", "");
+    }
+
+    template <typename X>
+    struct parser
+    {
+      static void
+      parse (X& x, bool& xs, scanner& s)
+      {
+        using namespace std;
+
+        const char* o (s.next ());
+        if (s.more ())
+        {
+          string v (s.next ());
+          istringstream is (v);
+          if (!(is >> x && is.peek () == istringstream::traits_type::eof ()))
+            throw invalid_value (o, v);
+        }
+        else
+          throw missing_value (o);
+
+        xs = true;
+      }
+
+      static void
+      merge (X& b, const X& a)
+      {
+        b = a;
+      }
+    };
+
+    template <>
+    struct parser<bool>
+    {
+      static void
+      parse (bool& x, scanner& s)
+      {
+        s.next ();
+        x = true;
+      }
+
+      static void
+      merge (bool& b, const bool&)
+      {
+        b = true;
+      }
+    };
+
+    template <>
+    struct parser<std::string>
+    {
+      static void
+      parse (std::string& x, bool& xs, scanner& s)
+      {
+        const char* o (s.next ());
+
+        if (s.more ())
+          x = s.next ();
+        else
+          throw missing_value (o);
+
+        xs = true;
+      }
+
+      static void
+      merge (std::string& b, const std::string& a)
+      {
+        b = a;
+      }
+    };
+
+    template <typename X>
+    struct parser<std::pair<X, std::size_t> >
+    {
+      static void
+      parse (std::pair<X, std::size_t>& x, bool& xs, scanner& s)
+      {
+        x.second = s.position ();
+        parser<X>::parse (x.first, xs, s);
+      }
+
+      static void
+      merge (std::pair<X, std::size_t>& b, const std::pair<X, std::size_t>& a)
+      {
+        b = a;
+      }
+    };
+
+    template <typename X>
+    struct parser<std::vector<X> >
+    {
+      static void
+      parse (std::vector<X>& c, bool& xs, scanner& s)
+      {
+        X x;
+        bool dummy;
+        parser<X>::parse (x, dummy, s);
+        c.push_back (x);
+        xs = true;
+      }
+
+      static void
+      merge (std::vector<X>& b, const std::vector<X>& a)
+      {
+        b.insert (b.end (), a.begin (), a.end ());
+      }
+    };
+
+    template <typename X, typename C>
+    struct parser<std::set<X, C> >
+    {
+      static void
+      parse (std::set<X, C>& c, bool& xs, scanner& s)
+      {
+        X x;
+        bool dummy;
+        parser<X>::parse (x, dummy, s);
+        c.insert (x);
+        xs = true;
+      }
+
+      static void
+      merge (std::set<X, C>& b, const std::set<X, C>& a)
+      {
+        b.insert (a.begin (), a.end ());
+      }
+    };
+
+    template <typename K, typename V, typename C>
+    struct parser<std::map<K, V, C> >
+    {
+      static void
+      parse (std::map<K, V, C>& m, bool& xs, scanner& s)
+      {
+        const char* o (s.next ());
+
+        if (s.more ())
+        {
+          std::size_t pos (s.position ());
+          std::string ov (s.next ());
+          std::string::size_type p = ov.find ('=');
+
+          K k = K ();
+          V v = V ();
+          std::string kstr (ov, 0, p);
+          std::string vstr (ov, (p != std::string::npos ? p + 1 : ov.size ()));
+
+          int ac (2);
+          char* av[] =
+          {
+            const_cast<char*> (o),
+            0
+          };
+
+          bool dummy;
+          if (!kstr.empty ())
+          {
+            av[1] = const_cast<char*> (kstr.c_str ());
+            argv_scanner s (0, ac, av, false, pos);
+            parser<K>::parse (k, dummy, s);
+          }
+
+          if (!vstr.empty ())
+          {
+            av[1] = const_cast<char*> (vstr.c_str ());
+            argv_scanner s (0, ac, av, false, pos);
+            parser<V>::parse (v, dummy, s);
+          }
+
+          m[k] = v;
+        }
+        else
+          throw missing_value (o);
+
+        xs = true;
+      }
+
+      static void
+      merge (std::map<K, V, C>& b, const std::map<K, V, C>& a)
+      {
+        for (typename std::map<K, V, C>::const_iterator i (a.begin ()); 
+             i != a.end (); 
+             ++i)
+          b[i->first] = i->second;
+      }
+    };
+
+    template <typename X, typename T, T X::*M>
+    void
+    thunk (X& x, scanner& s)
+    {
+      parser<T>::parse (x.*M, s);
+    }
+
+    template <typename X, typename T, T X::*M, bool X::*S>
+    void
+    thunk (X& x, scanner& s)
+    {
+      parser<T>::parse (x.*M, x.*S, s);
+    }
+  }
+}
+
+#include <map>
+#include <cstring>
+
+namespace bpkg
+{
+  // common_options
+  //
+
+  common_options::
+  common_options ()
+  : v_ (),
+    V_ (),
+    quiet_ (),
+    verbose_ (1),
+    verbose_specified_ (false),
+    stdout_format_ (bpkg::stdout_format::lines),
+    stdout_format_specified_ (false),
+    jobs_ (),
+    jobs_specified_ (false),
+    no_result_ (),
+    progress_ (),
+    no_progress_ (),
+    build_ (),
+    build_specified_ (false),
+    build_option_ (),
+    build_option_specified_ (false),
+    fetch_ (),
+    fetch_specified_ (false),
+    fetch_option_ (),
+    fetch_option_specified_ (false),
+    fetch_timeout_ (),
+    fetch_timeout_specified_ (false),
+    pkg_proxy_ (),
+    pkg_proxy_specified_ (false),
+    git_ ("git"),
+    git_specified_ (false),
+    git_option_ (),
+    git_option_specified_ (false),
+    sha256_ (),
+    sha256_specified_ (false),
+    sha256_option_ (),
+    sha256_option_specified_ (false),
+    tar_ (),
+    tar_specified_ (false),
+    tar_option_ (),
+    tar_option_specified_ (false),
+    openssl_ ("openssl"),
+    openssl_specified_ (false),
+    openssl_option_ (),
+    openssl_option_specified_ (false),
+    auth_ (bpkg::auth::remote),
+    auth_specified_ (false),
+    trust_ (),
+    trust_specified_ (false),
+    trust_yes_ (),
+    trust_no_ (),
+    pager_ (),
+    pager_specified_ (false),
+    pager_option_ (),
+    pager_option_specified_ (false),
+    options_file_ (),
+    options_file_specified_ (false),
+    default_options_ (),
+    default_options_specified_ (false),
+    no_default_options_ ()
+  {
+  }
+
+  void common_options::
+  merge (const common_options& a)
+  {
+    CLI_POTENTIALLY_UNUSED (a);
+
+    if (a.v_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->v_, a.v_);
+    }
+
+    if (a.V_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->V_, a.V_);
+    }
+
+    if (a.quiet_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->quiet_, a.quiet_);
+    }
+
+    if (a.verbose_specified_)
+    {
+      ::bpkg::cli::parser< uint16_t>::merge (
+        this->verbose_, a.verbose_);
+      this->verbose_specified_ = true;
+    }
+
+    if (a.stdout_format_specified_)
+    {
+      ::bpkg::cli::parser< bpkg::stdout_format>::merge (
+        this->stdout_format_, a.stdout_format_);
+      this->stdout_format_specified_ = true;
+    }
+
+    if (a.jobs_specified_)
+    {
+      ::bpkg::cli::parser< size_t>::merge (
+        this->jobs_, a.jobs_);
+      this->jobs_specified_ = true;
+    }
+
+    if (a.no_result_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->no_result_, a.no_result_);
+    }
+
+    if (a.progress_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->progress_, a.progress_);
+    }
+
+    if (a.no_progress_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->no_progress_, a.no_progress_);
+    }
+
+    if (a.build_specified_)
+    {
+      ::bpkg::cli::parser< path>::merge (
+        this->build_, a.build_);
+      this->build_specified_ = true;
+    }
+
+    if (a.build_option_specified_)
+    {
+      ::bpkg::cli::parser< strings>::merge (
+        this->build_option_, a.build_option_);
+      this->build_option_specified_ = true;
+    }
+
+    if (a.fetch_specified_)
+    {
+      ::bpkg::cli::parser< path>::merge (
+        this->fetch_, a.fetch_);
+      this->fetch_specified_ = true;
+    }
+
+    if (a.fetch_option_specified_)
+    {
+      ::bpkg::cli::parser< strings>::merge (
+        this->fetch_option_, a.fetch_option_);
+      this->fetch_option_specified_ = true;
+    }
+
+    if (a.fetch_timeout_specified_)
+    {
+      ::bpkg::cli::parser< size_t>::merge (
+        this->fetch_timeout_, a.fetch_timeout_);
+      this->fetch_timeout_specified_ = true;
+    }
+
+    if (a.pkg_proxy_specified_)
+    {
+      ::bpkg::cli::parser< butl::url>::merge (
+        this->pkg_proxy_, a.pkg_proxy_);
+      this->pkg_proxy_specified_ = true;
+    }
+
+    if (a.git_specified_)
+    {
+      ::bpkg::cli::parser< path>::merge (
+        this->git_, a.git_);
+      this->git_specified_ = true;
+    }
+
+    if (a.git_option_specified_)
+    {
+      ::bpkg::cli::parser< strings>::merge (
+        this->git_option_, a.git_option_);
+      this->git_option_specified_ = true;
+    }
+
+    if (a.sha256_specified_)
+    {
+      ::bpkg::cli::parser< path>::merge (
+        this->sha256_, a.sha256_);
+      this->sha256_specified_ = true;
+    }
+
+    if (a.sha256_option_specified_)
+    {
+      ::bpkg::cli::parser< strings>::merge (
+        this->sha256_option_, a.sha256_option_);
+      this->sha256_option_specified_ = true;
+    }
+
+    if (a.tar_specified_)
+    {
+      ::bpkg::cli::parser< path>::merge (
+        this->tar_, a.tar_);
+      this->tar_specified_ = true;
+    }
+
+    if (a.tar_option_specified_)
+    {
+      ::bpkg::cli::parser< strings>::merge (
+        this->tar_option_, a.tar_option_);
+      this->tar_option_specified_ = true;
+    }
+
+    if (a.openssl_specified_)
+    {
+      ::bpkg::cli::parser< qualified_option<openssl_commands, path>>::merge (
+        this->openssl_, a.openssl_);
+      this->openssl_specified_ = true;
+    }
+
+    if (a.openssl_option_specified_)
+    {
+      ::bpkg::cli::parser< qualified_option<openssl_commands, strings>>::merge (
+        this->openssl_option_, a.openssl_option_);
+      this->openssl_option_specified_ = true;
+    }
+
+    if (a.auth_specified_)
+    {
+      ::bpkg::cli::parser< bpkg::auth>::merge (
+        this->auth_, a.auth_);
+      this->auth_specified_ = true;
+    }
+
+    if (a.trust_specified_)
+    {
+      ::bpkg::cli::parser< std::set<string, icase_compare_string>>::merge (
+        this->trust_, a.trust_);
+      this->trust_specified_ = true;
+    }
+
+    if (a.trust_yes_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->trust_yes_, a.trust_yes_);
+    }
+
+    if (a.trust_no_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->trust_no_, a.trust_no_);
+    }
+
+    if (a.pager_specified_)
+    {
+      ::bpkg::cli::parser< string>::merge (
+        this->pager_, a.pager_);
+      this->pager_specified_ = true;
+    }
+
+    if (a.pager_option_specified_)
+    {
+      ::bpkg::cli::parser< strings>::merge (
+        this->pager_option_, a.pager_option_);
+      this->pager_option_specified_ = true;
+    }
+
+    if (a.options_file_specified_)
+    {
+      ::bpkg::cli::parser< string>::merge (
+        this->options_file_, a.options_file_);
+      this->options_file_specified_ = true;
+    }
+
+    if (a.default_options_specified_)
+    {
+      ::bpkg::cli::parser< dir_path>::merge (
+        this->default_options_, a.default_options_);
+      this->default_options_specified_ = true;
+    }
+
+    if (a.no_default_options_)
+    {
+      ::bpkg::cli::parser< bool>::merge (
+        this->no_default_options_, a.no_default_options_);
+    }
+  }
+
+  ::bpkg::cli::usage_para common_options::
+  print_usage (::std::ostream& os, ::bpkg::cli::usage_para p)
+  {
+    CLI_POTENTIALLY_UNUSED (os);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mCOMMON OPTIONS\033[0m" << ::std::endl;
+
+    os << std::endl
+       << "The common options are summarized below with a more detailed description" << ::std::endl
+       << "available in \033[1mbpkg-common-options(1)\033[0m." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m-v\033[0m                       Print essential underlying commands being executed." << ::std::endl;
+
+    os << "\033[1m-V\033[0m                       Print all underlying commands being executed." << ::std::endl;
+
+    os << "\033[1m--quiet\033[0m|\033[1m-q\033[0m               Run quietly, only printing error messages." << ::std::endl;
+
+    os << "\033[1m--verbose\033[0m \033[4mlevel\033[0m          Set the diagnostics verbosity to \033[4mlevel\033[0m between 0 and" << ::std::endl
+       << "                         6." << ::std::endl;
+
+    os << "\033[1m--stdout-format\033[0m \033[4mformat\033[0m   Representation format to use for printing to \033[1mstdout\033[0m." << ::std::endl;
+
+    os << "\033[1m--jobs\033[0m|\033[1m-j\033[0m \033[4mnum\033[0m            Number of jobs to perform in parallel." << ::std::endl;
+
+    os << "\033[1m--no-result\033[0m              Don't print informational messages about the outcome" << ::std::endl
+       << "                         of performing a command or some of its parts." << ::std::endl;
+
+    os << "\033[1m--progress\033[0m               Display progress indicators for long-lasting" << ::std::endl
+       << "                         operations, such as network transfers, building, etc." << ::std::endl;
+
+    os << "\033[1m--no-progress\033[0m            Suppress progress indicators for long-lasting" << ::std::endl
+       << "                         operations, such as network transfers, building, etc." << ::std::endl;
+
+    os << "\033[1m--build\033[0m \033[4mpath\033[0m             The build program to be used to build packages." << ::std::endl;
+
+    os << "\033[1m--build-option\033[0m \033[4mopt\033[0m       Additional option to be passed to the build program." << ::std::endl;
+
+    os << "\033[1m--fetch\033[0m \033[4mpath\033[0m             The fetch program to be used to download resources." << ::std::endl;
+
+    os << "\033[1m--fetch-option\033[0m \033[4mopt\033[0m       Additional option to be passed to the fetch program." << ::std::endl;
+
+    os << "\033[1m--fetch-timeout\033[0m \033[4msec\033[0m      The fetch and fetch-like (for example, \033[1mgit\033[0m) program" << ::std::endl
+       << "                         timeout." << ::std::endl;
+
+    os << "\033[1m--pkg-proxy\033[0m \033[4murl\033[0m          HTTP proxy server to use when fetching package" << ::std::endl
+       << "                         manifests and archives from remote \033[1mpkg\033[0m repositories." << ::std::endl;
+
+    os << "\033[1m--git\033[0m \033[4mpath\033[0m               The git program to be used to fetch git repositories." << ::std::endl;
+
+    os << "\033[1m--git-option\033[0m \033[4mopt\033[0m         Additional common option to be passed to the git" << ::std::endl
+       << "                         program." << ::std::endl;
+
+    os << "\033[1m--sha256\033[0m \033[4mpath\033[0m            The sha256 program to be used to calculate SHA256" << ::std::endl
+       << "                         sums." << ::std::endl;
+
+    os << "\033[1m--sha256-option\033[0m \033[4mopt\033[0m      Additional option to be passed to the sha256 program." << ::std::endl;
+
+    os << "\033[1m--tar\033[0m \033[4mpath\033[0m               The tar program to be used to extract package" << ::std::endl
+       << "                         archives." << ::std::endl;
+
+    os << "\033[1m--tar-option\033[0m \033[4mopt\033[0m         Additional option to be passed to the tar program." << ::std::endl;
+
+    os << "\033[1m--openssl\033[0m \033[4mpath\033[0m           The openssl program to be used for crypto operations." << ::std::endl;
+
+    os << "\033[1m--openssl-option\033[0m \033[4mopt\033[0m     Additional option to be passed to the openssl program." << ::std::endl;
+
+    os << "\033[1m--auth\033[0m \033[4mtype\033[0m              Types of repositories to authenticate." << ::std::endl;
+
+    os << "\033[1m--trust\033[0m \033[4mfingerprint\033[0m      Trust repository certificate with a SHA256" << ::std::endl
+       << "                         \033[4mfingerprint\033[0m." << ::std::endl;
+
+    os << "\033[1m--trust-yes\033[0m              Assume the answer to all authentication prompts is" << ::std::endl
+       << "                         \033[1myes\033[0m." << ::std::endl;
+
+    os << "\033[1m--trust-no\033[0m               Assume the answer to all authentication prompts is \033[1mno\033[0m." << ::std::endl;
+
+    os << "\033[1m--pager\033[0m \033[4mpath\033[0m             The pager program to be used to show long text." << ::std::endl;
+
+    os << "\033[1m--pager-option\033[0m \033[4mopt\033[0m       Additional option to be passed to the pager program." << ::std::endl;
+
+    os << "\033[1m--options-file\033[0m \033[4mfile\033[0m      Read additional options from \033[4mfile\033[0m." << ::std::endl;
+
+    os << "\033[1m--default-options\033[0m \033[4mdir\033[0m    The directory to load additional default options files" << ::std::endl
+       << "                         from." << ::std::endl;
+
+    os << "\033[1m--no-default-options\033[0m     Don't load default options files." << ::std::endl;
+
+    p = ::bpkg::cli::usage_para::option;
+
+    return p;
+  }
+
+  ::bpkg::cli::usage_para common_options::
+  print_long_usage (::std::ostream& os, ::bpkg::cli::usage_para p)
+  {
+    CLI_POTENTIALLY_UNUSED (os);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mCOMMON OPTIONS\033[0m" << ::std::endl;
+
+    os << std::endl
+       << "\033[1m-v\033[0m                       Print essential underlying commands being executed." << ::std::endl
+       << "                         This is equivalent to \033[1m--verbose 2\033[0m." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m-V\033[0m                       Print all underlying commands being executed. This is" << ::std::endl
+       << "                         equivalent to \033[1m--verbose 3\033[0m." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--quiet\033[0m|\033[1m-q\033[0m               Run quietly, only printing error messages. This is" << ::std::endl
+       << "                         equivalent to \033[1m--verbose 0\033[0m." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--verbose\033[0m \033[4mlevel\033[0m          Set the diagnostics verbosity to \033[4mlevel\033[0m between 0 and" << ::std::endl
+       << "                         6. Level 0 disables any non-error messages while level" << ::std::endl
+       << "                         6 produces lots of information, with level 1 being the" << ::std::endl
+       << "                         default. The following additional types of diagnostics" << ::std::endl
+       << "                         are produced at each level:" << ::std::endl
+       << ::std::endl
+       << "                         1. High-level information messages." << ::std::endl
+       << "                         2. Essential underlying commands being executed." << ::std::endl
+       << "                         3. All underlying commands being executed." << ::std::endl
+       << "                         4. Information that could be helpful to the user." << ::std::endl
+       << "                         5. Information that could be helpful to the developer." << ::std::endl
+       << "                         6. Even more detailed information." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--stdout-format\033[0m \033[4mformat\033[0m   Representation format to use for printing to \033[1mstdout\033[0m." << ::std::endl
+       << "                         Valid values for this option are \033[1mlines\033[0m (default) and" << ::std::endl
+       << "                         \033[1mjson\033[0m. See the JSON OUTPUT section below for details on" << ::std::endl
+       << "                         the \033[1mjson\033[0m format." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--jobs\033[0m|\033[1m-j\033[0m \033[4mnum\033[0m            Number of jobs to perform in parallel. If this option" << ::std::endl
+       << "                         is not specified or specified with the 0\033[0m value, then" << ::std::endl
+       << "                         the number of available hardware threads is used. This" << ::std::endl
+       << "                         option is also propagated when performing build system" << ::std::endl
+       << "                         operations such as \033[1mupdate\033[0m, \033[1mtest\033[0m, etc." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--no-result\033[0m              Don't print informational messages about the outcome" << ::std::endl
+       << "                         of performing a command or some of its parts. Note" << ::std::endl
+       << "                         that if this option is specified, then for certain" << ::std::endl
+       << "                         long-running command parts progress is displayed" << ::std::endl
+       << "                         instead, unless suppressed with \033[1m--no-progress\033[0m." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--progress\033[0m               Display progress indicators for long-lasting" << ::std::endl
+       << "                         operations, such as network transfers, building, etc." << ::std::endl
+       << "                         If printing to a terminal the progress is displayed by" << ::std::endl
+       << "                         default for low verbosity levels. Use \033[1m--no-progress\033[0m to" << ::std::endl
+       << "                         suppress." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--no-progress\033[0m            Suppress progress indicators for long-lasting" << ::std::endl
+       << "                         operations, such as network transfers, building, etc." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--build\033[0m \033[4mpath\033[0m             The build program to be used to build packages. This" << ::std::endl
+       << "                         should be the path to the build2 \033[1mb\033[0m executable. You can" << ::std::endl
+       << "                         also specify additional options that should be passed" << ::std::endl
+       << "                         to the build program with \033[1m--build-option\033[0m." << ::std::endl
+       << ::std::endl
+       << "                         If the build program is not explicitly specified, then" << ::std::endl
+       << "                         \033[1mbpkg\033[0m will by default use \033[1mb\033[0m plus an executable suffix" << ::std::endl
+       << "                         if one was specified when building \033[1mbpkg\033[0m. So, for" << ::std::endl
+       << "                         example, if \033[1mbpkg\033[0m name was set to \033[1mbpkg-1.0\033[0m, then it" << ::std::endl
+       << "                         will look for \033[1mb-1.0\033[0m." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--build-option\033[0m \033[4mopt\033[0m       Additional option to be passed to the build program." << ::std::endl
+       << "                         See \033[1m--build\033[0m for more information on the build program." << ::std::endl
+       << "                         Repeat this option to specify multiple build options." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--fetch\033[0m \033[4mpath\033[0m             The fetch program to be used to download resources." << ::std::endl
+       << "                         Currently, \033[1mbpkg\033[0m recognizes \033[1mcurl\033[0m, \033[1mwget\033[0m, and \033[1mfetch\033[0m. Note" << ::std::endl
+       << "                         that the last component of \033[4mpath\033[0m must contain one of" << ::std::endl
+       << "                         these names as a substring in order for \033[1mbpkg\033[0m to" << ::std::endl
+       << "                         recognize which program is being used. You can also" << ::std::endl
+       << "                         specify additional options that should be passed to" << ::std::endl
+       << "                         the fetch program with \033[1m--fetch-option\033[0m." << ::std::endl
+       << ::std::endl
+       << "                         If the fetch program is not specified, then \033[1mbpkg\033[0m will" << ::std::endl
+       << "                         try to discover if one of the above programs is" << ::std::endl
+       << "                         available and use that. Currently, \033[1mbpkg\033[0m has the" << ::std::endl
+       << "                         following preference order: \033[1mwget\033[0m 1.16 or higher" << ::std::endl
+       << "                         (supports \033[1m--show-progress\033[0m), \033[1mcurl\033[0m, \033[1mwget\033[0m, and \033[1mfetch\033[0m." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--fetch-option\033[0m \033[4mopt\033[0m       Additional option to be passed to the fetch program." << ::std::endl
+       << "                         See \033[1m--fetch\033[0m for more information on the fetch program." << ::std::endl
+       << "                         Repeat this option to specify multiple fetch options." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--fetch-timeout\033[0m \033[4msec\033[0m      The fetch and fetch-like (for example, \033[1mgit\033[0m) program" << ::std::endl
+       << "                         timeout. While the exact semantics of the value" << ::std::endl
+       << "                         depends on the program used, at a minimum it specifies" << ::std::endl
+       << "                         in seconds the maximum time that can be spent without" << ::std::endl
+       << "                         any network activity." << ::std::endl
+       << ::std::endl
+       << "                         Specifically, it is translated to the \033[1m--max-time\033[0m" << ::std::endl
+       << "                         option for \033[1mcurl\033[0m and to the \033[1m--timeout\033[0m option for \033[1mwget\033[0m" << ::std::endl
+       << "                         and \033[1mfetch\033[0m. For \033[1mgit\033[0m over HTTP/HTTPS this semantics is" << ::std::endl
+       << "                         achieved using the \033[1mhttp.lowSpeedLimit\033[0m=\033[4m1\033[0m" << ::std::endl
+       << "                         \033[1mhttp.lowSpeedTime\033[0m=\033[4msec\033[0m configuration values (the" << ::std::endl
+       << "                         \033[1mgit://\033[0m and \033[1mssh://\033[0m protocols currently do not support" << ::std::endl
+       << "                         timeouts)." << ::std::endl
+       << ::std::endl
+       << "                         See \033[1m--fetch\033[0m and \033[1m--git\033[0m for more information on the" << ::std::endl
+       << "                         fetch programs." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--pkg-proxy\033[0m \033[4murl\033[0m          HTTP proxy server to use when fetching package" << ::std::endl
+       << "                         manifests and archives from remote \033[1mpkg\033[0m repositories." << ::std::endl
+       << "                         If specified, the proxy \033[4murl\033[0m must be in the" << ::std::endl
+       << "                         \033[1mhttp://\033[0m\033[4mhost\033[0m[\033[1m:\033[0m\033[4mport\033[0m]\033[0m form. If \033[4mport\033[0m is omitted, 80 is" << ::std::endl
+       << "                         used by default." << ::std::endl
+       << ::std::endl
+       << "                         Note that to allow caching, the proxied \033[1mhttps://\033[0m URLs" << ::std::endl
+       << "                         are converted to \033[1mhttp://\033[0m in order to prevent the fetch" << ::std::endl
+       << "                         program from tunneling (which is the standard approach" << ::std::endl
+       << "                         for proxying HTTPS). If both HTTP and HTTPS" << ::std::endl
+       << "                         repositories are used, it is assumed that the proxy" << ::std::endl
+       << "                         server can figure out which URLs need to be converted" << ::std::endl
+       << "                         back to \033[1mhttps://\033[0m based on the request information (for" << ::std::endl
+       << "                         example, host name). For security, this mechanism" << ::std::endl
+       << "                         should only be used with signed repositories or when" << ::std::endl
+       << "                         the proxy is located inside a trusted network." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--git\033[0m \033[4mpath\033[0m               The git program to be used to fetch git repositories." << ::std::endl
+       << "                         You can also specify additional options that should be" << ::std::endl
+       << "                         passed to the git program with \033[1m--git-option\033[0m." << ::std::endl
+       << ::std::endl
+       << "                         If the git program is not explicitly specified, then" << ::std::endl
+       << "                         \033[1mbpkg\033[0m will use \033[1mgit\033[0m by default." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--git-option\033[0m \033[4mopt\033[0m         Additional common option to be passed to the git" << ::std::endl
+       << "                         program. Note that the common options are the ones" << ::std::endl
+       << "                         that precede the \033[1mgit\033[0m command. See \033[1m--git\033[0m for more" << ::std::endl
+       << "                         information on the git program. Repeat this option to" << ::std::endl
+       << "                         specify multiple git options." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--sha256\033[0m \033[4mpath\033[0m            The sha256 program to be used to calculate SHA256" << ::std::endl
+       << "                         sums. Currently, \033[1mbpkg\033[0m recognizes \033[1msha256\033[0m, \033[1msha256sum\033[0m," << ::std::endl
+       << "                         and \033[1mshasum\033[0m. Note that the last component of \033[4mpath\033[0m must" << ::std::endl
+       << "                         contain one of these names as a substring in order for" << ::std::endl
+       << "                         \033[1mbpkg\033[0m to recognize which program is being used. You can" << ::std::endl
+       << "                         also specify additional options that should be passed" << ::std::endl
+       << "                         to the sha256 program with \033[1m--sha256-option\033[0m." << ::std::endl
+       << ::std::endl
+       << "                         If the sha256 program is not specified, then \033[1mbpkg\033[0m will" << ::std::endl
+       << "                         try to discover if one of the above programs is" << ::std::endl
+       << "                         available and use that. Currently, \033[1mbpkg\033[0m has the" << ::std::endl
+       << "                         following preference order: \033[1msha256\033[0m, \033[1msha256sum\033[0m, and" << ::std::endl
+       << "                         \033[1mshasum\033[0m." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--sha256-option\033[0m \033[4mopt\033[0m      Additional option to be passed to the sha256 program." << ::std::endl
+       << "                         See \033[1m--sha256\033[0m for more information on the sha256" << ::std::endl
+       << "                         program. Repeat this option to specify multiple sha256" << ::std::endl
+       << "                         options." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--tar\033[0m \033[4mpath\033[0m               The tar program to be used to extract package" << ::std::endl
+       << "                         archives. For example, \033[1mgtar\033[0m or \033[1mbsdtar\033[0m. You can also" << ::std::endl
+       << "                         specify additional options that should be passed to" << ::std::endl
+       << "                         the tar program with \033[1m--tar-option\033[0m. If the tar program" << ::std::endl
+       << "                         is not explicitly specified, then \033[1mbpkg\033[0m will use \033[1mtar\033[0m by" << ::std::endl
+       << "                         default." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--tar-option\033[0m \033[4mopt\033[0m         Additional option to be passed to the tar program. See" << ::std::endl
+       << "                         \033[1m--tar\033[0m for more information on the tar program. Repeat" << ::std::endl
+       << "                         this option to specify multiple tar options." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--openssl\033[0m \033[4mpath\033[0m           The openssl program to be used for crypto operations." << ::std::endl
+       << "                         You can also specify additional options that should be" << ::std::endl
+       << "                         passed to the openssl program with \033[1m--openssl-option\033[0m." << ::std::endl
+       << "                         If the openssl program is not explicitly specified," << ::std::endl
+       << "                         then \033[1mbpkg\033[0m will use \033[1mopenssl\033[0m by default." << ::std::endl
+       << ::std::endl
+       << "                         The \033[1m--openssl*\033[0m values can be optionally qualified with" << ::std::endl
+       << "                         the openssl command in the \033[4mcommand\033[0m\033[1m:\033[0m\033[4mvalue\033[0m\033[0m form. This" << ::std::endl
+       << "                         makes the value only applicable to the specific" << ::std::endl
+       << "                         command, for example:" << ::std::endl
+       << ::std::endl
+       << "                         bpkg rep-create                      \\" << ::std::endl
+       << "                           --openssl pkeyutl:/path/to/openssl \\" << ::std::endl
+       << "                           --openssl-option pkeyutl:-engine   \\" << ::std::endl
+       << "                           --openssl-option pkeyutl:pkcs11    \\" << ::std::endl
+       << "                           ..." << ::std::endl
+       << ::std::endl
+       << "                         Note that for \033[1mopenssl\033[0m versions prior to \033[1m3.0.0\033[0m \033[1mbpkg\033[0m" << ::std::endl
+       << "                         uses the \033[1mrsautl\033[0m command instead of \033[1mpkeyutl\033[0m for the" << ::std::endl
+       << "                         data signing and recovery operations." << ::std::endl
+       << ::std::endl
+       << "                         An unqualified value that contains a colon can be" << ::std::endl
+       << "                         specified as qualified with an empty command, for" << ::std::endl
+       << "                         example, \033[1m--openssl :C:\\bin\\openssl\033[0m. To see openssl" << ::std::endl
+       << "                         commands executed by \033[1mbpkg\033[0m, use the verbose mode (\033[1m-v\033[0m" << ::std::endl
+       << "                         option)." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--openssl-option\033[0m \033[4mopt\033[0m     Additional option to be passed to the openssl program." << ::std::endl
+       << "                         See \033[1m--openssl\033[0m for more information on the openssl" << ::std::endl
+       << "                         program. The values can be optionally qualified with" << ::std::endl
+       << "                         the openssl command, as discussed in \033[1m--openssl\033[0m. Repeat" << ::std::endl
+       << "                         this option to specify multiple openssl options." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--auth\033[0m \033[4mtype\033[0m              Types of repositories to authenticate. Valid values" << ::std::endl
+       << "                         for this option are \033[1mnone\033[0m, \033[1mremote\033[0m, \033[1mall\033[0m. By default only" << ::std::endl
+       << "                         remote repositories are authenticated. You can request" << ::std::endl
+       << "                         authentication of local repositories by passing \033[1mall\033[0m or" << ::std::endl
+       << "                         disable authentication completely by passing \033[1mnone\033[0m." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--trust\033[0m \033[4mfingerprint\033[0m      Trust repository certificate with a SHA256" << ::std::endl
+       << "                         \033[4mfingerprint\033[0m. Such a certificate is trusted" << ::std::endl
+       << "                         automatically, without prompting the user for a" << ::std::endl
+       << "                         confirmation. Repeat this option to trust multiple" << ::std::endl
+       << "                         certificates." << ::std::endl
+       << ::std::endl
+       << "                         Note that by default \033[1mopenssl\033[0m prints a SHA1 fingerprint" << ::std::endl
+       << "                         and to obtain a SHA256 one you will need to pass the" << ::std::endl
+       << "                         \033[1m-sha256\033[0m option, for example:" << ::std::endl
+       << ::std::endl
+       << "                         openssl x509 -sha256 -fingerprint -noout -in cert.pem" << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--trust-yes\033[0m              Assume the answer to all authentication prompts is" << ::std::endl
+       << "                         \033[1myes\033[0m." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--trust-no\033[0m               Assume the answer to all authentication prompts is \033[1mno\033[0m." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--pager\033[0m \033[4mpath\033[0m             The pager program to be used to show long text." << ::std::endl
+       << "                         Commonly used pager programs are \033[1mless\033[0m and \033[1mmore\033[0m. You" << ::std::endl
+       << "                         can also specify additional options that should be" << ::std::endl
+       << "                         passed to the pager program with \033[1m--pager-option\033[0m. If an" << ::std::endl
+       << "                         empty string is specified as the pager program, then" << ::std::endl
+       << "                         no pager will be used. If the pager program is not" << ::std::endl
+       << "                         explicitly specified, then \033[1mbpkg\033[0m will try to use \033[1mless\033[0m." << ::std::endl
+       << "                         If it is not available, then no pager will be used." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--pager-option\033[0m \033[4mopt\033[0m       Additional option to be passed to the pager program." << ::std::endl
+       << "                         See \033[1m--pager\033[0m for more information on the pager program." << ::std::endl
+       << "                         Repeat this option to specify multiple pager options." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--options-file\033[0m \033[4mfile\033[0m      Read additional options from \033[4mfile\033[0m. Each option should" << ::std::endl
+       << "                         appear on a separate line optionally followed by space" << ::std::endl
+       << "                         or equal sign (\033[1m=\033[0m) and an option value. Empty lines and" << ::std::endl
+       << "                         lines starting with \033[1m#\033[0m are ignored. Option values can" << ::std::endl
+       << "                         be enclosed in double (\033[1m\"\033[0m) or single (\033[1m'\033[0m) quotes to" << ::std::endl
+       << "                         preserve leading and trailing whitespaces as well as" << ::std::endl
+       << "                         to specify empty values. If the value itself contains" << ::std::endl
+       << "                         trailing or leading quotes, enclose it with an extra" << ::std::endl
+       << "                         pair of quotes, for example \033[1m'\"x\"'\033[0m. Non-leading and" << ::std::endl
+       << "                         non-trailing quotes are interpreted as being part of" << ::std::endl
+       << "                         the option value." << ::std::endl
+       << ::std::endl
+       << "                         The semantics of providing options in a file is" << ::std::endl
+       << "                         equivalent to providing the same set of options in the" << ::std::endl
+       << "                         same order on the command line at the point where the" << ::std::endl
+       << "                         \033[1m--options-file\033[0m option is specified except that the" << ::std::endl
+       << "                         shell escaping and quoting is not required. Repeat" << ::std::endl
+       << "                         this option to specify more than one options file." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--default-options\033[0m \033[4mdir\033[0m    The directory to load additional default options files" << ::std::endl
+       << "                         from." << ::std::endl;
+
+    os << std::endl
+       << "\033[1m--no-default-options\033[0m     Don't load default options files." << ::std::endl;
+
+    p = ::bpkg::cli::usage_para::option;
+
+    return p;
+  }
+
+  typedef
+  std::map<std::string, void (*) (common_options&, ::bpkg::cli::scanner&)>
+  _cli_common_options_map;
+
+  static _cli_common_options_map _cli_common_options_map_;
+
+  struct _cli_common_options_map_init
+  {
+    _cli_common_options_map_init ()
+    {
+      _cli_common_options_map_["-v"] =
+      &::bpkg::cli::thunk< common_options, bool, &common_options::v_ >;
+      _cli_common_options_map_["-V"] =
+      &::bpkg::cli::thunk< common_options, bool, &common_options::V_ >;
+      _cli_common_options_map_["--quiet"] =
+      &::bpkg::cli::thunk< common_options, bool, &common_options::quiet_ >;
+      _cli_common_options_map_["-q"] =
+      &::bpkg::cli::thunk< common_options, bool, &common_options::quiet_ >;
+      _cli_common_options_map_["--verbose"] =
+      &::bpkg::cli::thunk< common_options, uint16_t, &common_options::verbose_,
+        &common_options::verbose_specified_ >;
+      _cli_common_options_map_["--stdout-format"] =
+      &::bpkg::cli::thunk< common_options, bpkg::stdout_format, &common_options::stdout_format_,
+        &common_options::stdout_format_specified_ >;
+      _cli_common_options_map_["--jobs"] =
+      &::bpkg::cli::thunk< common_options, size_t, &common_options::jobs_,
+        &common_options::jobs_specified_ >;
+      _cli_common_options_map_["-j"] =
+      &::bpkg::cli::thunk< common_options, size_t, &common_options::jobs_,
+        &common_options::jobs_specified_ >;
+      _cli_common_options_map_["--no-result"] =
+      &::bpkg::cli::thunk< common_options, bool, &common_options::no_result_ >;
+      _cli_common_options_map_["--progress"] =
+      &::bpkg::cli::thunk< common_options, bool, &common_options::progress_ >;
+      _cli_common_options_map_["--no-progress"] =
+      &::bpkg::cli::thunk< common_options, bool, &common_options::no_progress_ >;
+      _cli_common_options_map_["--build"] =
+      &::bpkg::cli::thunk< common_options, path, &common_options::build_,
+        &common_options::build_specified_ >;
+      _cli_common_options_map_["--build-option"] =
+      &::bpkg::cli::thunk< common_options, strings, &common_options::build_option_,
+        &common_options::build_option_specified_ >;
+      _cli_common_options_map_["--fetch"] =
+      &::bpkg::cli::thunk< common_options, path, &common_options::fetch_,
+        &common_options::fetch_specified_ >;
+      _cli_common_options_map_["--fetch-option"] =
+      &::bpkg::cli::thunk< common_options, strings, &common_options::fetch_option_,
+        &common_options::fetch_option_specified_ >;
+      _cli_common_options_map_["--fetch-timeout"] =
+      &::bpkg::cli::thunk< common_options, size_t, &common_options::fetch_timeout_,
+        &common_options::fetch_timeout_specified_ >;
+      _cli_common_options_map_["--pkg-proxy"] =
+      &::bpkg::cli::thunk< common_options, butl::url, &common_options::pkg_proxy_,
+        &common_options::pkg_proxy_specified_ >;
+      _cli_common_options_map_["--git"] =
+      &::bpkg::cli::thunk< common_options, path, &common_options::git_,
+        &common_options::git_specified_ >;
+      _cli_common_options_map_["--git-option"] =
+      &::bpkg::cli::thunk< common_options, strings, &common_options::git_option_,
+        &common_options::git_option_specified_ >;
+      _cli_common_options_map_["--sha256"] =
+      &::bpkg::cli::thunk< common_options, path, &common_options::sha256_,
+        &common_options::sha256_specified_ >;
+      _cli_common_options_map_["--sha256-option"] =
+      &::bpkg::cli::thunk< common_options, strings, &common_options::sha256_option_,
+        &common_options::sha256_option_specified_ >;
+      _cli_common_options_map_["--tar"] =
+      &::bpkg::cli::thunk< common_options, path, &common_options::tar_,
+        &common_options::tar_specified_ >;
+      _cli_common_options_map_["--tar-option"] =
+      &::bpkg::cli::thunk< common_options, strings, &common_options::tar_option_,
+        &common_options::tar_option_specified_ >;
+      _cli_common_options_map_["--openssl"] =
+      &::bpkg::cli::thunk< common_options, qualified_option<openssl_commands, path>, &common_options::openssl_,
+        &common_options::openssl_specified_ >;
+      _cli_common_options_map_["--openssl-option"] =
+      &::bpkg::cli::thunk< common_options, qualified_option<openssl_commands, strings>, &common_options::openssl_option_,
+        &common_options::openssl_option_specified_ >;
+      _cli_common_options_map_["--auth"] =
+      &::bpkg::cli::thunk< common_options, bpkg::auth, &common_options::auth_,
+        &common_options::auth_specified_ >;
+      _cli_common_options_map_["--trust"] =
+      &::bpkg::cli::thunk< common_options, std::set<string, icase_compare_string>, &common_options::trust_,
+        &common_options::trust_specified_ >;
+      _cli_common_options_map_["--trust-yes"] =
+      &::bpkg::cli::thunk< common_options, bool, &common_options::trust_yes_ >;
+      _cli_common_options_map_["--trust-no"] =
+      &::bpkg::cli::thunk< common_options, bool, &common_options::trust_no_ >;
+      _cli_common_options_map_["--pager"] =
+      &::bpkg::cli::thunk< common_options, string, &common_options::pager_,
+        &common_options::pager_specified_ >;
+      _cli_common_options_map_["--pager-option"] =
+      &::bpkg::cli::thunk< common_options, strings, &common_options::pager_option_,
+        &common_options::pager_option_specified_ >;
+      _cli_common_options_map_["--options-file"] =
+      &::bpkg::cli::thunk< common_options, string, &common_options::options_file_,
+        &common_options::options_file_specified_ >;
+      _cli_common_options_map_["--default-options"] =
+      &::bpkg::cli::thunk< common_options, dir_path, &common_options::default_options_,
+        &common_options::default_options_specified_ >;
+      _cli_common_options_map_["--no-default-options"] =
+      &::bpkg::cli::thunk< common_options, bool, &common_options::no_default_options_ >;
+    }
+  };
+
+  static _cli_common_options_map_init _cli_common_options_map_init_;
+
+  bool common_options::
+  _parse (const char* o, ::bpkg::cli::scanner& s)
+  {
+    _cli_common_options_map::const_iterator i (_cli_common_options_map_.find (o));
+
+    if (i != _cli_common_options_map_.end ())
+    {
+      (*(i->second)) (*this, s);
+      return true;
+    }
+
+    return false;
+  }
+}
+
+namespace bpkg
+{
+  ::bpkg::cli::usage_para
+  print_bpkg_common_options_usage (::std::ostream& os, ::bpkg::cli::usage_para p)
+  {
+    CLI_POTENTIALLY_UNUSED (os);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mSYNOPSIS\033[0m" << ::std::endl
+       << ::std::endl
+       << "\033[1mbpkg\033[0m [\033[4mcommon-options\033[0m] ...\033[0m" << ::std::endl
+       << ::std::endl
+       << "\033[1mDESCRIPTION\033[0m" << ::std::endl
+       << ::std::endl
+       << "The common options control behavior that is common to all or most of the \033[1mbpkg\033[0m" << ::std::endl
+       << "commands. They can be specified either before the command or after, together" << ::std::endl
+       << "with the command-specific options." << ::std::endl;
+
+    p = ::bpkg::common_options::print_usage (os, ::bpkg::cli::usage_para::text);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mJSON OUTPUT\033[0m" << ::std::endl
+       << ::std::endl
+       << "Commands that support the JSON output specify their formats as a serialized" << ::std::endl
+       << "representation of a C++ \033[1mstruct\033[0m or an array thereof. For example:" << ::std::endl
+       << ::std::endl
+       << "struct package" << ::std::endl
+       << "{" << ::std::endl
+       << "  string name;" << ::std::endl
+       << "};" << ::std::endl
+       << ::std::endl
+       << "struct configuration" << ::std::endl
+       << "{" << ::std::endl
+       << "  uint64_t         id;" << ::std::endl
+       << "  string           path;" << ::std::endl
+       << "  optional<string> name;" << ::std::endl
+       << "  bool             default;" << ::std::endl
+       << "  vector<package>  packages;" << ::std::endl
+       << "};" << ::std::endl
+       << ::std::endl
+       << "An example of the serialized JSON representation of \033[1mstruct\033[0m \033[1mconfiguration\033[0m:" << ::std::endl
+       << ::std::endl
+       << "{" << ::std::endl
+       << "  \"id\": 1," << ::std::endl
+       << "  \"path\": \"/tmp/hello-gcc\"," << ::std::endl
+       << "  \"name\": \"gcc\"," << ::std::endl
+       << "  \"default\": true," << ::std::endl
+       << "  \"packages\": [" << ::std::endl
+       << "    {" << ::std::endl
+       << "      \"name\": \"hello\"" << ::std::endl
+       << "    }" << ::std::endl
+       << "  ]" << ::std::endl
+       << "}" << ::std::endl
+       << ::std::endl
+       << "This sections provides details on the overall properties of such formats and" << ::std::endl
+       << "the semantics of the \033[1mstruct\033[0m serialization." << ::std::endl
+       << ::std::endl
+       << "The order of members in a JSON object is fixed as specified in the" << ::std::endl
+       << "corresponding \033[1mstruct\033[0m. While new members may be added in the future (and should" << ::std::endl
+       << "be ignored by older consumers), the semantics of the existing members" << ::std::endl
+       << "(including whether the top-level entry is an object or array) may not change." << ::std::endl
+       << ::std::endl
+       << "An object member is required unless its type is \033[1moptional<>\033[0m, \033[1mbool\033[0m, or \033[1mvector<>\033[0m" << ::std::endl
+       << "(array). For \033[1mbool\033[0m members absent means \033[1mfalse\033[0m. For \033[1mvector<>\033[0m members absent means" << ::std::endl
+       << "empty. An empty top-level array is always present." << ::std::endl
+       << ::std::endl
+       << "For example, the following JSON text is a possible serialization of the above" << ::std::endl
+       << "\033[1mstruct\033[0m \033[1mconfiguration\033[0m:" << ::std::endl
+       << ::std::endl
+       << "{" << ::std::endl
+       << "  \"id\": 1," << ::std::endl
+       << "  \"path\": \"/tmp/hello-gcc\"" << ::std::endl
+       << "}" << ::std::endl;
+
+    p = ::bpkg::cli::usage_para::text;
+
+    return p;
+  }
+
+  ::bpkg::cli::usage_para
+  print_bpkg_common_options_long_usage (::std::ostream& os, ::bpkg::cli::usage_para p)
+  {
+    CLI_POTENTIALLY_UNUSED (os);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mSYNOPSIS\033[0m" << ::std::endl
+       << ::std::endl
+       << "\033[1mbpkg\033[0m [\033[4mcommon-options\033[0m] ...\033[0m" << ::std::endl
+       << ::std::endl
+       << "\033[1mDESCRIPTION\033[0m" << ::std::endl
+       << ::std::endl
+       << "The common options control behavior that is common to all or most of the \033[1mbpkg\033[0m" << ::std::endl
+       << "commands. They can be specified either before the command or after, together" << ::std::endl
+       << "with the command-specific options." << ::std::endl;
+
+    p = ::bpkg::common_options::print_long_usage (os, ::bpkg::cli::usage_para::text);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mJSON OUTPUT\033[0m" << ::std::endl
+       << ::std::endl
+       << "Commands that support the JSON output specify their formats as a serialized" << ::std::endl
+       << "representation of a C++ \033[1mstruct\033[0m or an array thereof. For example:" << ::std::endl
+       << ::std::endl
+       << "struct package" << ::std::endl
+       << "{" << ::std::endl
+       << "  string name;" << ::std::endl
+       << "};" << ::std::endl
+       << ::std::endl
+       << "struct configuration" << ::std::endl
+       << "{" << ::std::endl
+       << "  uint64_t         id;" << ::std::endl
+       << "  string           path;" << ::std::endl
+       << "  optional<string> name;" << ::std::endl
+       << "  bool             default;" << ::std::endl
+       << "  vector<package>  packages;" << ::std::endl
+       << "};" << ::std::endl
+       << ::std::endl
+       << "An example of the serialized JSON representation of \033[1mstruct\033[0m \033[1mconfiguration\033[0m:" << ::std::endl
+       << ::std::endl
+       << "{" << ::std::endl
+       << "  \"id\": 1," << ::std::endl
+       << "  \"path\": \"/tmp/hello-gcc\"," << ::std::endl
+       << "  \"name\": \"gcc\"," << ::std::endl
+       << "  \"default\": true," << ::std::endl
+       << "  \"packages\": [" << ::std::endl
+       << "    {" << ::std::endl
+       << "      \"name\": \"hello\"" << ::std::endl
+       << "    }" << ::std::endl
+       << "  ]" << ::std::endl
+       << "}" << ::std::endl
+       << ::std::endl
+       << "This sections provides details on the overall properties of such formats and" << ::std::endl
+       << "the semantics of the \033[1mstruct\033[0m serialization." << ::std::endl
+       << ::std::endl
+       << "The order of members in a JSON object is fixed as specified in the" << ::std::endl
+       << "corresponding \033[1mstruct\033[0m. While new members may be added in the future (and should" << ::std::endl
+       << "be ignored by older consumers), the semantics of the existing members" << ::std::endl
+       << "(including whether the top-level entry is an object or array) may not change." << ::std::endl
+       << ::std::endl
+       << "An object member is required unless its type is \033[1moptional<>\033[0m, \033[1mbool\033[0m, or \033[1mvector<>\033[0m" << ::std::endl
+       << "(array). For \033[1mbool\033[0m members absent means \033[1mfalse\033[0m. For \033[1mvector<>\033[0m members absent means" << ::std::endl
+       << "empty. An empty top-level array is always present." << ::std::endl
+       << ::std::endl
+       << "For example, the following JSON text is a possible serialization of the above" << ::std::endl
+       << "\033[1mstruct\033[0m \033[1mconfiguration\033[0m:" << ::std::endl
+       << ::std::endl
+       << "{" << ::std::endl
+       << "  \"id\": 1," << ::std::endl
+       << "  \"path\": \"/tmp/hello-gcc\"" << ::std::endl
+       << "}" << ::std::endl;
+
+    p = ::bpkg::cli::usage_para::text;
+
+    return p;
+  }
+}
+
+// Begin epilogue.
+//
+//
+// End epilogue.
+
diff --git a/bpkg/common-options.hxx b/bpkg/common-options.hxx
new file mode 100644
index 0000000..6b4d1a8
--- /dev/null
+++ b/bpkg/common-options.hxx
@@ -0,0 +1,1137 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+#ifndef BPKG_COMMON_OPTIONS_HXX
+#define BPKG_COMMON_OPTIONS_HXX
+
+// Begin prologue.
+//
+//
+// End prologue.
+
+#include <list>
+#include <deque>
+#include <vector>
+#include <iosfwd>
+#include <string>
+#include <cstddef>
+#include <exception>
+
+#ifndef CLI_POTENTIALLY_UNUSED
+#  if defined(_MSC_VER) || defined(__xlC__)
+#    define CLI_POTENTIALLY_UNUSED(x) (void*)&x
+#  else
+#    define CLI_POTENTIALLY_UNUSED(x) (void)x
+#  endif
+#endif
+
+namespace bpkg
+{
+  namespace cli
+  {
+    class usage_para
+    {
+      public:
+      enum value
+      {
+        none,
+        text,
+        option
+      };
+
+      usage_para (value);
+
+      operator value () const 
+      {
+        return v_;
+      }
+
+      private:
+      value v_;
+    };
+
+    class unknown_mode
+    {
+      public:
+      enum value
+      {
+        skip,
+        stop,
+        fail
+      };
+
+      unknown_mode (value);
+
+      operator value () const 
+      {
+        return v_;
+      }
+
+      private:
+      value v_;
+    };
+
+    // Exceptions.
+    //
+
+    class exception: public std::exception
+    {
+      public:
+      virtual void
+      print (::std::ostream&) const = 0;
+    };
+
+    ::std::ostream&
+    operator<< (::std::ostream&, const exception&);
+
+    class unknown_option: public exception
+    {
+      public:
+      virtual
+      ~unknown_option () throw ();
+
+      unknown_option (const std::string& option);
+
+      const std::string&
+      option () const;
+
+      virtual void
+      print (::std::ostream&) const;
+
+      virtual const char*
+      what () const throw ();
+
+      private:
+      std::string option_;
+    };
+
+    class unknown_argument: public exception
+    {
+      public:
+      virtual
+      ~unknown_argument () throw ();
+
+      unknown_argument (const std::string& argument);
+
+      const std::string&
+      argument () const;
+
+      virtual void
+      print (::std::ostream&) const;
+
+      virtual const char*
+      what () const throw ();
+
+      private:
+      std::string argument_;
+    };
+
+    class missing_value: public exception
+    {
+      public:
+      virtual
+      ~missing_value () throw ();
+
+      missing_value (const std::string& option);
+
+      const std::string&
+      option () const;
+
+      virtual void
+      print (::std::ostream&) const;
+
+      virtual const char*
+      what () const throw ();
+
+      private:
+      std::string option_;
+    };
+
+    class invalid_value: public exception
+    {
+      public:
+      virtual
+      ~invalid_value () throw ();
+
+      invalid_value (const std::string& option,
+                     const std::string& value,
+                     const std::string& message = std::string ());
+
+      const std::string&
+      option () const;
+
+      const std::string&
+      value () const;
+
+      const std::string&
+      message () const;
+
+      virtual void
+      print (::std::ostream&) const;
+
+      virtual const char*
+      what () const throw ();
+
+      private:
+      std::string option_;
+      std::string value_;
+      std::string message_;
+    };
+
+    class eos_reached: public exception
+    {
+      public:
+      virtual void
+      print (::std::ostream&) const;
+
+      virtual const char*
+      what () const throw ();
+    };
+
+    class file_io_failure: public exception
+    {
+      public:
+      virtual
+      ~file_io_failure () throw ();
+
+      file_io_failure (const std::string& file);
+
+      const std::string&
+      file () const;
+
+      virtual void
+      print (::std::ostream&) const;
+
+      virtual const char*
+      what () const throw ();
+
+      private:
+      std::string file_;
+    };
+
+    class unmatched_quote: public exception
+    {
+      public:
+      virtual
+      ~unmatched_quote () throw ();
+
+      unmatched_quote (const std::string& argument);
+
+      const std::string&
+      argument () const;
+
+      virtual void
+      print (::std::ostream&) const;
+
+      virtual const char*
+      what () const throw ();
+
+      private:
+      std::string argument_;
+    };
+
+    class unexpected_group: public exception
+    {
+      public:
+      virtual
+      ~unexpected_group () throw ();
+
+      unexpected_group (const std::string& argument,
+                        const std::string& group);
+
+      const std::string&
+      argument () const;
+
+      const std::string&
+      group () const;
+
+      virtual void
+      print (std::ostream&) const;
+
+      virtual const char*
+      what () const throw ();
+
+      private:
+      std::string argument_;
+      std::string group_;
+    };
+
+    class group_separator: public exception
+    {
+      public:
+      virtual
+      ~group_separator () throw ();
+
+      // Note: either (but not both) can be empty.
+      //
+      group_separator (const std::string& encountered,
+                       const std::string& expected);
+
+      const std::string&
+      encountered () const;
+
+      const std::string&
+      expected () const;
+
+      virtual void
+      print (std::ostream&) const;
+
+      virtual const char*
+      what () const throw ();
+
+      private:
+      std::string encountered_;
+      std::string expected_;
+    };
+
+    // Command line argument scanner interface.
+    //
+    // The values returned by next() are guaranteed to be valid
+    // for the two previous arguments up until a call to a third
+    // peek() or next().
+    //
+    // The position() function returns a monotonically-increasing
+    // number which, if stored, can later be used to determine the
+    // relative position of the argument returned by the following
+    // call to next(). Note that if multiple scanners are used to
+    // extract arguments from multiple sources, then the end
+    // position of the previous scanner should be used as the
+    // start position of the next.
+    //
+    class scanner
+    {
+      public:
+      virtual
+      ~scanner ();
+
+      virtual bool
+      more () = 0;
+
+      virtual const char*
+      peek () = 0;
+
+      virtual const char*
+      next () = 0;
+
+      virtual void
+      skip () = 0;
+
+      virtual std::size_t
+      position () = 0;
+    };
+
+    class argv_scanner: public scanner
+    {
+      public:
+      argv_scanner (int& argc,
+                    char** argv,
+                    bool erase = false,
+                    std::size_t start_position = 0);
+
+      argv_scanner (int start,
+                    int& argc,
+                    char** argv,
+                    bool erase = false,
+                    std::size_t start_position = 0);
+
+      int
+      end () const;
+
+      virtual bool
+      more ();
+
+      virtual const char*
+      peek ();
+
+      virtual const char*
+      next ();
+
+      virtual void
+      skip ();
+
+      virtual std::size_t
+      position ();
+
+      protected:
+      std::size_t start_position_;
+      int i_;
+      int& argc_;
+      char** argv_;
+      bool erase_;
+    };
+
+    class vector_scanner: public scanner
+    {
+      public:
+      vector_scanner (const std::vector<std::string>&,
+                      std::size_t start = 0,
+                      std::size_t start_position = 0);
+
+      std::size_t
+      end () const;
+
+      void
+      reset (std::size_t start = 0, std::size_t start_position = 0);
+
+      virtual bool
+      more ();
+
+      virtual const char*
+      peek ();
+
+      virtual const char*
+      next ();
+
+      virtual void
+      skip ();
+
+      virtual std::size_t
+      position ();
+
+      private:
+      std::size_t start_position_;
+      const std::vector<std::string>& v_;
+      std::size_t i_;
+    };
+
+    class argv_file_scanner: public argv_scanner
+    {
+      public:
+      argv_file_scanner (int& argc,
+                         char** argv,
+                         const std::string& option,
+                         bool erase = false,
+                         std::size_t start_position = 0);
+
+      argv_file_scanner (int start,
+                         int& argc,
+                         char** argv,
+                         const std::string& option,
+                         bool erase = false,
+                         std::size_t start_position = 0);
+
+      argv_file_scanner (const std::string& file,
+                         const std::string& option,
+                         std::size_t start_position = 0);
+
+      struct option_info
+      {
+        // If search_func is not NULL, it is called, with the arg
+        // value as the second argument, to locate the options file.
+        // If it returns an empty string, then the file is ignored.
+        //
+        const char* option;
+        std::string (*search_func) (const char*, void* arg);
+        void* arg;
+      };
+
+      argv_file_scanner (int& argc,
+                          char** argv,
+                          const option_info* options,
+                          std::size_t options_count,
+                          bool erase = false,
+                          std::size_t start_position = 0);
+
+      argv_file_scanner (int start,
+                         int& argc,
+                         char** argv,
+                         const option_info* options,
+                         std::size_t options_count,
+                         bool erase = false,
+                         std::size_t start_position = 0);
+
+      argv_file_scanner (const std::string& file,
+                         const option_info* options = 0,
+                         std::size_t options_count = 0,
+                         std::size_t start_position = 0);
+
+      virtual bool
+      more ();
+
+      virtual const char*
+      peek ();
+
+      virtual const char*
+      next ();
+
+      virtual void
+      skip ();
+
+      virtual std::size_t
+      position ();
+
+      // Return the file path if the peeked at argument came from a file and
+      // the empty string otherwise. The reference is guaranteed to be valid
+      // till the end of the scanner lifetime.
+      //
+      const std::string&
+      peek_file ();
+
+      // Return the 1-based line number if the peeked at argument came from
+      // a file and zero otherwise.
+      //
+      std::size_t
+      peek_line ();
+
+      private:
+      const option_info*
+      find (const char*) const;
+
+      void
+      load (const std::string& file);
+
+      typedef argv_scanner base;
+
+      const std::string option_;
+      option_info option_info_;
+      const option_info* options_;
+      std::size_t options_count_;
+
+      struct arg
+      {
+        std::string value;
+        const std::string* file;
+        std::size_t line;
+      };
+
+      std::deque<arg> args_;
+      std::list<std::string> files_;
+
+      // Circular buffer of two arguments.
+      //
+      std::string hold_[2];
+      std::size_t i_;
+
+      bool skip_;
+
+      static int zero_argc_;
+      static std::string empty_string_;
+    };
+
+    class group_scanner: public scanner
+    {
+      public:
+      group_scanner (scanner&);
+
+      virtual bool
+      more ();
+
+      virtual const char*
+      peek ();
+
+      virtual const char*
+      next ();
+
+      virtual void
+      skip ();
+
+      virtual std::size_t
+      position ();
+
+      // The group is only available after the call to next()
+      // (and skip() -- in case one needs to make sure the group
+      // was empty, or some such) and is only valid (and must be
+      // handled) until the next call to any of the scanner
+      // functions (including more()).
+      //
+      // Note also that argument positions within each group start
+      // from 0.
+      //
+      scanner&
+      group ();
+
+      // Escape an argument that is a group separator. Return the
+      // passed string if no escaping is required.
+      //
+      static const char*
+      escape (const char*);
+
+      private:
+      enum state
+      {
+        peeked,  // Argument peeked at with peek().
+        scanned, // Argument scanned with next().
+        skipped, // Argument skipped with skip()/initial.
+      };
+
+      enum separator
+      {
+        none,
+        open,      // {
+        close,     // }
+        open_plus, // +{
+        close_plus // }+
+      };
+
+      static separator
+      sense (const char*);
+
+      // Scan the leading groups, the next argument/argument pack,
+      // and the trailing groups.
+      //
+      void
+      scan_group ();
+
+      scanner& scan_;
+      state state_;
+
+      // Circular buffer of two arguments.
+      //
+      std::vector<std::string> arg_[2];
+      std::size_t i_, j_, pos_;
+
+      std::vector<std::string> group_;
+      vector_scanner group_scan_;
+    };
+
+    template <typename X>
+    struct parser;
+  }
+}
+
+#include <set>
+
+#include <bpkg/types.hxx>
+
+#include <bpkg/options-types.hxx>
+
+namespace bpkg
+{
+  class common_options
+  {
+    public:
+    // Merge options from the specified instance appending/overriding
+    // them as if they appeared after options in this instance.
+    //
+    void
+    merge (const common_options&);
+
+    // Option accessors and modifiers.
+    //
+    const bool&
+    v () const;
+
+    bool&
+    v ();
+
+    void
+    v (const bool&);
+
+    const bool&
+    V () const;
+
+    bool&
+    V ();
+
+    void
+    V (const bool&);
+
+    const bool&
+    quiet () const;
+
+    bool&
+    quiet ();
+
+    void
+    quiet (const bool&);
+
+    const uint16_t&
+    verbose () const;
+
+    uint16_t&
+    verbose ();
+
+    void
+    verbose (const uint16_t&);
+
+    bool
+    verbose_specified () const;
+
+    void
+    verbose_specified (bool);
+
+    const bpkg::stdout_format&
+    stdout_format () const;
+
+    bpkg::stdout_format&
+    stdout_format ();
+
+    void
+    stdout_format (const bpkg::stdout_format&);
+
+    bool
+    stdout_format_specified () const;
+
+    void
+    stdout_format_specified (bool);
+
+    const size_t&
+    jobs () const;
+
+    size_t&
+    jobs ();
+
+    void
+    jobs (const size_t&);
+
+    bool
+    jobs_specified () const;
+
+    void
+    jobs_specified (bool);
+
+    const bool&
+    no_result () const;
+
+    bool&
+    no_result ();
+
+    void
+    no_result (const bool&);
+
+    const bool&
+    progress () const;
+
+    bool&
+    progress ();
+
+    void
+    progress (const bool&);
+
+    const bool&
+    no_progress () const;
+
+    bool&
+    no_progress ();
+
+    void
+    no_progress (const bool&);
+
+    const path&
+    build () const;
+
+    path&
+    build ();
+
+    void
+    build (const path&);
+
+    bool
+    build_specified () const;
+
+    void
+    build_specified (bool);
+
+    const strings&
+    build_option () const;
+
+    strings&
+    build_option ();
+
+    void
+    build_option (const strings&);
+
+    bool
+    build_option_specified () const;
+
+    void
+    build_option_specified (bool);
+
+    const path&
+    fetch () const;
+
+    path&
+    fetch ();
+
+    void
+    fetch (const path&);
+
+    bool
+    fetch_specified () const;
+
+    void
+    fetch_specified (bool);
+
+    const strings&
+    fetch_option () const;
+
+    strings&
+    fetch_option ();
+
+    void
+    fetch_option (const strings&);
+
+    bool
+    fetch_option_specified () const;
+
+    void
+    fetch_option_specified (bool);
+
+    const size_t&
+    fetch_timeout () const;
+
+    size_t&
+    fetch_timeout ();
+
+    void
+    fetch_timeout (const size_t&);
+
+    bool
+    fetch_timeout_specified () const;
+
+    void
+    fetch_timeout_specified (bool);
+
+    const butl::url&
+    pkg_proxy () const;
+
+    butl::url&
+    pkg_proxy ();
+
+    void
+    pkg_proxy (const butl::url&);
+
+    bool
+    pkg_proxy_specified () const;
+
+    void
+    pkg_proxy_specified (bool);
+
+    const path&
+    git () const;
+
+    path&
+    git ();
+
+    void
+    git (const path&);
+
+    bool
+    git_specified () const;
+
+    void
+    git_specified (bool);
+
+    const strings&
+    git_option () const;
+
+    strings&
+    git_option ();
+
+    void
+    git_option (const strings&);
+
+    bool
+    git_option_specified () const;
+
+    void
+    git_option_specified (bool);
+
+    const path&
+    sha256 () const;
+
+    path&
+    sha256 ();
+
+    void
+    sha256 (const path&);
+
+    bool
+    sha256_specified () const;
+
+    void
+    sha256_specified (bool);
+
+    const strings&
+    sha256_option () const;
+
+    strings&
+    sha256_option ();
+
+    void
+    sha256_option (const strings&);
+
+    bool
+    sha256_option_specified () const;
+
+    void
+    sha256_option_specified (bool);
+
+    const path&
+    tar () const;
+
+    path&
+    tar ();
+
+    void
+    tar (const path&);
+
+    bool
+    tar_specified () const;
+
+    void
+    tar_specified (bool);
+
+    const strings&
+    tar_option () const;
+
+    strings&
+    tar_option ();
+
+    void
+    tar_option (const strings&);
+
+    bool
+    tar_option_specified () const;
+
+    void
+    tar_option_specified (bool);
+
+    const qualified_option<openssl_commands, path>&
+    openssl () const;
+
+    qualified_option<openssl_commands, path>&
+    openssl ();
+
+    void
+    openssl (const qualified_option<openssl_commands, path>&);
+
+    bool
+    openssl_specified () const;
+
+    void
+    openssl_specified (bool);
+
+    const qualified_option<openssl_commands, strings>&
+    openssl_option () const;
+
+    qualified_option<openssl_commands, strings>&
+    openssl_option ();
+
+    void
+    openssl_option (const qualified_option<openssl_commands, strings>&);
+
+    bool
+    openssl_option_specified () const;
+
+    void
+    openssl_option_specified (bool);
+
+    const bpkg::auth&
+    auth () const;
+
+    bpkg::auth&
+    auth ();
+
+    void
+    auth (const bpkg::auth&);
+
+    bool
+    auth_specified () const;
+
+    void
+    auth_specified (bool);
+
+    const std::set<string, icase_compare_string>&
+    trust () const;
+
+    std::set<string, icase_compare_string>&
+    trust ();
+
+    void
+    trust (const std::set<string, icase_compare_string>&);
+
+    bool
+    trust_specified () const;
+
+    void
+    trust_specified (bool);
+
+    const bool&
+    trust_yes () const;
+
+    bool&
+    trust_yes ();
+
+    void
+    trust_yes (const bool&);
+
+    const bool&
+    trust_no () const;
+
+    bool&
+    trust_no ();
+
+    void
+    trust_no (const bool&);
+
+    const string&
+    pager () const;
+
+    string&
+    pager ();
+
+    void
+    pager (const string&);
+
+    bool
+    pager_specified () const;
+
+    void
+    pager_specified (bool);
+
+    const strings&
+    pager_option () const;
+
+    strings&
+    pager_option ();
+
+    void
+    pager_option (const strings&);
+
+    bool
+    pager_option_specified () const;
+
+    void
+    pager_option_specified (bool);
+
+    const string&
+    options_file () const;
+
+    string&
+    options_file ();
+
+    void
+    options_file (const string&);
+
+    bool
+    options_file_specified () const;
+
+    void
+    options_file_specified (bool);
+
+    const dir_path&
+    default_options () const;
+
+    dir_path&
+    default_options ();
+
+    void
+    default_options (const dir_path&);
+
+    bool
+    default_options_specified () const;
+
+    void
+    default_options_specified (bool);
+
+    const bool&
+    no_default_options () const;
+
+    bool&
+    no_default_options ();
+
+    void
+    no_default_options (const bool&);
+
+    // Print usage information.
+    //
+    static ::bpkg::cli::usage_para
+    print_usage (::std::ostream&,
+                 ::bpkg::cli::usage_para = ::bpkg::cli::usage_para::none);
+
+    static ::bpkg::cli::usage_para
+    print_long_usage (::std::ostream&,
+                      ::bpkg::cli::usage_para = ::bpkg::cli::usage_para::none);
+
+    // Implementation details.
+    //
+    protected:
+    common_options ();
+
+    bool
+    _parse (const char*, ::bpkg::cli::scanner&);
+
+    public:
+    bool v_;
+    bool V_;
+    bool quiet_;
+    uint16_t verbose_;
+    bool verbose_specified_;
+    bpkg::stdout_format stdout_format_;
+    bool stdout_format_specified_;
+    size_t jobs_;
+    bool jobs_specified_;
+    bool no_result_;
+    bool progress_;
+    bool no_progress_;
+    path build_;
+    bool build_specified_;
+    strings build_option_;
+    bool build_option_specified_;
+    path fetch_;
+    bool fetch_specified_;
+    strings fetch_option_;
+    bool fetch_option_specified_;
+    size_t fetch_timeout_;
+    bool fetch_timeout_specified_;
+    butl::url pkg_proxy_;
+    bool pkg_proxy_specified_;
+    path git_;
+    bool git_specified_;
+    strings git_option_;
+    bool git_option_specified_;
+    path sha256_;
+    bool sha256_specified_;
+    strings sha256_option_;
+    bool sha256_option_specified_;
+    path tar_;
+    bool tar_specified_;
+    strings tar_option_;
+    bool tar_option_specified_;
+    qualified_option<openssl_commands, path> openssl_;
+    bool openssl_specified_;
+    qualified_option<openssl_commands, strings> openssl_option_;
+    bool openssl_option_specified_;
+    bpkg::auth auth_;
+    bool auth_specified_;
+    std::set<string, icase_compare_string> trust_;
+    bool trust_specified_;
+    bool trust_yes_;
+    bool trust_no_;
+    string pager_;
+    bool pager_specified_;
+    strings pager_option_;
+    bool pager_option_specified_;
+    string options_file_;
+    bool options_file_specified_;
+    dir_path default_options_;
+    bool default_options_specified_;
+    bool no_default_options_;
+  };
+}
+
+// Print page usage information.
+//
+namespace bpkg
+{
+  ::bpkg::cli::usage_para
+  print_bpkg_common_options_usage (::std::ostream&,
+                                   ::bpkg::cli::usage_para = ::bpkg::cli::usage_para::none);
+
+  ::bpkg::cli::usage_para
+  print_bpkg_common_options_long_usage (::std::ostream&,
+                                        ::bpkg::cli::usage_para = ::bpkg::cli::usage_para::none);
+}
+
+#include <bpkg/common-options.ixx>
+
+// Begin epilogue.
+//
+//
+// End epilogue.
+
+#endif // BPKG_COMMON_OPTIONS_HXX
diff --git a/bpkg/common-options.ixx b/bpkg/common-options.ixx
new file mode 100644
index 0000000..b9eae20
--- /dev/null
+++ b/bpkg/common-options.ixx
@@ -0,0 +1,1262 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+// Begin prologue.
+//
+//
+// End prologue.
+
+#include <cassert>
+
+namespace bpkg
+{
+  namespace cli
+  {
+    // usage_para
+    //
+    inline usage_para::
+    usage_para (value v)
+    : v_ (v)
+    {
+    }
+
+    // unknown_mode
+    //
+    inline unknown_mode::
+    unknown_mode (value v)
+    : v_ (v)
+    {
+    }
+
+    // exception
+    //
+    inline ::std::ostream&
+    operator<< (::std::ostream& os, const exception& e)
+    {
+      e.print (os);
+      return os;
+    }
+
+    // unknown_option
+    //
+    inline unknown_option::
+    unknown_option (const std::string& option)
+    : option_ (option)
+    {
+    }
+
+    inline const std::string& unknown_option::
+    option () const
+    {
+      return option_;
+    }
+
+    // unknown_argument
+    //
+    inline unknown_argument::
+    unknown_argument (const std::string& argument)
+    : argument_ (argument)
+    {
+    }
+
+    inline const std::string& unknown_argument::
+    argument () const
+    {
+      return argument_;
+    }
+
+    // missing_value
+    //
+    inline missing_value::
+    missing_value (const std::string& option)
+    : option_ (option)
+    {
+    }
+
+    inline const std::string& missing_value::
+    option () const
+    {
+      return option_;
+    }
+
+    // invalid_value
+    //
+    inline invalid_value::
+    invalid_value (const std::string& option,
+                   const std::string& value,
+                   const std::string& message)
+    : option_ (option),
+      value_ (value),
+      message_ (message)
+    {
+    }
+
+    inline const std::string& invalid_value::
+    option () const
+    {
+      return option_;
+    }
+
+    inline const std::string& invalid_value::
+    value () const
+    {
+      return value_;
+    }
+
+    inline const std::string& invalid_value::
+    message () const
+    {
+      return message_;
+    }
+
+    // file_io_failure
+    //
+    inline file_io_failure::
+    file_io_failure (const std::string& file)
+    : file_ (file)
+    {
+    }
+
+    inline const std::string& file_io_failure::
+    file () const
+    {
+      return file_;
+    }
+
+    // unmatched_quote
+    //
+    inline unmatched_quote::
+    unmatched_quote (const std::string& argument)
+    : argument_ (argument)
+    {
+    }
+
+    inline const std::string& unmatched_quote::
+    argument () const
+    {
+      return argument_;
+    }
+
+    // unexpected_group
+    //
+    inline unexpected_group::
+    unexpected_group (const std::string& argument,
+                      const std::string& group)
+    : argument_ (argument), group_ (group)
+    {
+    }
+
+    inline const std::string& unexpected_group::
+    argument () const
+    {
+      return argument_;
+    }
+
+    inline const std::string& unexpected_group::
+    group () const
+    {
+      return group_;
+    }
+
+    // group_separator
+    //
+    inline group_separator::
+    group_separator (const std::string& encountered,
+                     const std::string& expected)
+    : encountered_ (encountered), expected_ (expected)
+    {
+    }
+
+    inline const std::string& group_separator::
+    encountered () const
+    {
+      return encountered_;
+    }
+
+    inline const std::string& group_separator::
+    expected () const
+    {
+      return expected_;
+    }
+
+    // argv_scanner
+    //
+    inline argv_scanner::
+    argv_scanner (int& argc,
+                  char** argv,
+                  bool erase,
+                  std::size_t sp)
+    : start_position_ (sp + 1),
+      i_ (1),
+      argc_ (argc),
+      argv_ (argv),
+      erase_ (erase)
+    {
+    }
+
+    inline argv_scanner::
+    argv_scanner (int start,
+                  int& argc,
+                  char** argv,
+                  bool erase,
+                  std::size_t sp)
+    : start_position_ (sp + static_cast<std::size_t> (start)),
+      i_ (start),
+      argc_ (argc),
+      argv_ (argv),
+      erase_ (erase)
+    {
+    }
+
+    inline int argv_scanner::
+    end () const
+    {
+      return i_;
+    }
+
+    // vector_scanner
+    //
+    inline vector_scanner::
+    vector_scanner (const std::vector<std::string>& v,
+                    std::size_t i,
+                    std::size_t sp)
+    : start_position_ (sp), v_ (v), i_ (i)
+    {
+    }
+
+    inline std::size_t vector_scanner::
+    end () const
+    {
+      return i_;
+    }
+
+    inline void vector_scanner::
+    reset (std::size_t i, std::size_t sp)
+    {
+      i_ = i;
+      start_position_ = sp;
+    }
+
+    // argv_file_scanner
+    //
+    inline argv_file_scanner::
+    argv_file_scanner (int& argc,
+                       char** argv,
+                       const std::string& option,
+                       bool erase,
+                       std::size_t sp)
+    : argv_scanner (argc, argv, erase, sp),
+      option_ (option),
+      options_ (&option_info_),
+      options_count_ (1),
+      i_ (1),
+      skip_ (false)
+    {
+      option_info_.option = option_.c_str ();
+      option_info_.search_func = 0;
+    }
+
+    inline argv_file_scanner::
+    argv_file_scanner (int start,
+                       int& argc,
+                       char** argv,
+                       const std::string& option,
+                       bool erase,
+                       std::size_t sp)
+    : argv_scanner (start, argc, argv, erase, sp),
+      option_ (option),
+      options_ (&option_info_),
+      options_count_ (1),
+      i_ (1),
+      skip_ (false)
+    {
+      option_info_.option = option_.c_str ();
+      option_info_.search_func = 0;
+    }
+
+    inline argv_file_scanner::
+    argv_file_scanner (const std::string& file,
+                       const std::string& option,
+                       std::size_t sp)
+    : argv_scanner (0, zero_argc_, 0, sp),
+      option_ (option),
+      options_ (&option_info_),
+      options_count_ (1),
+      i_ (1),
+      skip_ (false)
+    {
+      option_info_.option = option_.c_str ();
+      option_info_.search_func = 0;
+
+      load (file);
+    }
+
+    inline argv_file_scanner::
+    argv_file_scanner (int& argc,
+                       char** argv,
+                       const option_info* options,
+                       std::size_t options_count,
+                       bool erase,
+                       std::size_t sp)
+    : argv_scanner (argc, argv, erase, sp),
+      options_ (options),
+      options_count_ (options_count),
+      i_ (1),
+      skip_ (false)
+    {
+    }
+
+    inline argv_file_scanner::
+    argv_file_scanner (int start,
+                       int& argc,
+                       char** argv,
+                       const option_info* options,
+                       std::size_t options_count,
+                       bool erase,
+                       std::size_t sp)
+    : argv_scanner (start, argc, argv, erase, sp),
+      options_ (options),
+      options_count_ (options_count),
+      i_ (1),
+      skip_ (false)
+    {
+    }
+
+    inline argv_file_scanner::
+    argv_file_scanner (const std::string& file,
+                       const option_info* options,
+                       std::size_t options_count,
+                       std::size_t sp)
+    : argv_scanner (0, zero_argc_, 0, sp),
+      options_ (options),
+      options_count_ (options_count),
+      i_ (1),
+      skip_ (false)
+    {
+      load (file);
+    }
+
+    // group_scanner
+    //
+    inline group_scanner::
+    group_scanner (scanner& s)
+    : scan_ (s), state_ (skipped), i_ (1), j_ (0), group_scan_ (group_)
+    {
+    }
+
+    inline scanner& group_scanner::
+    group ()
+    {
+      assert (state_ == scanned || state_ == skipped);
+      return group_scan_;
+    }
+
+    inline const char* group_scanner::
+    escape (const char* a)
+    {
+      switch (sense (a))
+      {
+        case separator::none:       break;
+        case separator::open:       return "\\{";
+        case separator::close:      return "\\}";
+        case separator::open_plus:  return "\\+{";
+        case separator::close_plus: return "\\}+";
+      }
+
+      return a;
+    }
+
+    inline group_scanner::separator group_scanner::
+    sense (const char* s)
+    {
+      switch (s[0])
+      {
+        case '{': return s[1] == '\0' ? open  : none;
+        case '}':
+        {
+          switch (s[1])
+          {
+            case '+': return s[2] == '\0' ? close_plus  : none;
+            default:  return s[1] == '\0' ? close       : none;
+          }
+        }
+        case '+':
+        {
+          switch (s[1])
+          {
+            case '{': return s[2] == '\0' ? open_plus  : none;
+            default:  return                             none;
+          }
+        }
+      }
+
+      return none;
+    }
+  }
+}
+
+namespace bpkg
+{
+  // common_options
+  //
+
+  inline const bool& common_options::
+  v () const
+  {
+    return this->v_;
+  }
+
+  inline bool& common_options::
+  v ()
+  {
+    return this->v_;
+  }
+
+  inline void common_options::
+  v (const bool& x)
+  {
+    this->v_ = x;
+  }
+
+  inline const bool& common_options::
+  V () const
+  {
+    return this->V_;
+  }
+
+  inline bool& common_options::
+  V ()
+  {
+    return this->V_;
+  }
+
+  inline void common_options::
+  V (const bool& x)
+  {
+    this->V_ = x;
+  }
+
+  inline const bool& common_options::
+  quiet () const
+  {
+    return this->quiet_;
+  }
+
+  inline bool& common_options::
+  quiet ()
+  {
+    return this->quiet_;
+  }
+
+  inline void common_options::
+  quiet (const bool& x)
+  {
+    this->quiet_ = x;
+  }
+
+  inline const uint16_t& common_options::
+  verbose () const
+  {
+    return this->verbose_;
+  }
+
+  inline uint16_t& common_options::
+  verbose ()
+  {
+    return this->verbose_;
+  }
+
+  inline void common_options::
+  verbose (const uint16_t& x)
+  {
+    this->verbose_ = x;
+  }
+
+  inline bool common_options::
+  verbose_specified () const
+  {
+    return this->verbose_specified_;
+  }
+
+  inline void common_options::
+  verbose_specified (bool x)
+  {
+    this->verbose_specified_ = x;
+  }
+
+  inline const bpkg::stdout_format& common_options::
+  stdout_format () const
+  {
+    return this->stdout_format_;
+  }
+
+  inline bpkg::stdout_format& common_options::
+  stdout_format ()
+  {
+    return this->stdout_format_;
+  }
+
+  inline void common_options::
+  stdout_format (const bpkg::stdout_format& x)
+  {
+    this->stdout_format_ = x;
+  }
+
+  inline bool common_options::
+  stdout_format_specified () const
+  {
+    return this->stdout_format_specified_;
+  }
+
+  inline void common_options::
+  stdout_format_specified (bool x)
+  {
+    this->stdout_format_specified_ = x;
+  }
+
+  inline const size_t& common_options::
+  jobs () const
+  {
+    return this->jobs_;
+  }
+
+  inline size_t& common_options::
+  jobs ()
+  {
+    return this->jobs_;
+  }
+
+  inline void common_options::
+  jobs (const size_t& x)
+  {
+    this->jobs_ = x;
+  }
+
+  inline bool common_options::
+  jobs_specified () const
+  {
+    return this->jobs_specified_;
+  }
+
+  inline void common_options::
+  jobs_specified (bool x)
+  {
+    this->jobs_specified_ = x;
+  }
+
+  inline const bool& common_options::
+  no_result () const
+  {
+    return this->no_result_;
+  }
+
+  inline bool& common_options::
+  no_result ()
+  {
+    return this->no_result_;
+  }
+
+  inline void common_options::
+  no_result (const bool& x)
+  {
+    this->no_result_ = x;
+  }
+
+  inline const bool& common_options::
+  progress () const
+  {
+    return this->progress_;
+  }
+
+  inline bool& common_options::
+  progress ()
+  {
+    return this->progress_;
+  }
+
+  inline void common_options::
+  progress (const bool& x)
+  {
+    this->progress_ = x;
+  }
+
+  inline const bool& common_options::
+  no_progress () const
+  {
+    return this->no_progress_;
+  }
+
+  inline bool& common_options::
+  no_progress ()
+  {
+    return this->no_progress_;
+  }
+
+  inline void common_options::
+  no_progress (const bool& x)
+  {
+    this->no_progress_ = x;
+  }
+
+  inline const path& common_options::
+  build () const
+  {
+    return this->build_;
+  }
+
+  inline path& common_options::
+  build ()
+  {
+    return this->build_;
+  }
+
+  inline void common_options::
+  build (const path& x)
+  {
+    this->build_ = x;
+  }
+
+  inline bool common_options::
+  build_specified () const
+  {
+    return this->build_specified_;
+  }
+
+  inline void common_options::
+  build_specified (bool x)
+  {
+    this->build_specified_ = x;
+  }
+
+  inline const strings& common_options::
+  build_option () const
+  {
+    return this->build_option_;
+  }
+
+  inline strings& common_options::
+  build_option ()
+  {
+    return this->build_option_;
+  }
+
+  inline void common_options::
+  build_option (const strings& x)
+  {
+    this->build_option_ = x;
+  }
+
+  inline bool common_options::
+  build_option_specified () const
+  {
+    return this->build_option_specified_;
+  }
+
+  inline void common_options::
+  build_option_specified (bool x)
+  {
+    this->build_option_specified_ = x;
+  }
+
+  inline const path& common_options::
+  fetch () const
+  {
+    return this->fetch_;
+  }
+
+  inline path& common_options::
+  fetch ()
+  {
+    return this->fetch_;
+  }
+
+  inline void common_options::
+  fetch (const path& x)
+  {
+    this->fetch_ = x;
+  }
+
+  inline bool common_options::
+  fetch_specified () const
+  {
+    return this->fetch_specified_;
+  }
+
+  inline void common_options::
+  fetch_specified (bool x)
+  {
+    this->fetch_specified_ = x;
+  }
+
+  inline const strings& common_options::
+  fetch_option () const
+  {
+    return this->fetch_option_;
+  }
+
+  inline strings& common_options::
+  fetch_option ()
+  {
+    return this->fetch_option_;
+  }
+
+  inline void common_options::
+  fetch_option (const strings& x)
+  {
+    this->fetch_option_ = x;
+  }
+
+  inline bool common_options::
+  fetch_option_specified () const
+  {
+    return this->fetch_option_specified_;
+  }
+
+  inline void common_options::
+  fetch_option_specified (bool x)
+  {
+    this->fetch_option_specified_ = x;
+  }
+
+  inline const size_t& common_options::
+  fetch_timeout () const
+  {
+    return this->fetch_timeout_;
+  }
+
+  inline size_t& common_options::
+  fetch_timeout ()
+  {
+    return this->fetch_timeout_;
+  }
+
+  inline void common_options::
+  fetch_timeout (const size_t& x)
+  {
+    this->fetch_timeout_ = x;
+  }
+
+  inline bool common_options::
+  fetch_timeout_specified () const
+  {
+    return this->fetch_timeout_specified_;
+  }
+
+  inline void common_options::
+  fetch_timeout_specified (bool x)
+  {
+    this->fetch_timeout_specified_ = x;
+  }
+
+  inline const butl::url& common_options::
+  pkg_proxy () const
+  {
+    return this->pkg_proxy_;
+  }
+
+  inline butl::url& common_options::
+  pkg_proxy ()
+  {
+    return this->pkg_proxy_;
+  }
+
+  inline void common_options::
+  pkg_proxy (const butl::url& x)
+  {
+    this->pkg_proxy_ = x;
+  }
+
+  inline bool common_options::
+  pkg_proxy_specified () const
+  {
+    return this->pkg_proxy_specified_;
+  }
+
+  inline void common_options::
+  pkg_proxy_specified (bool x)
+  {
+    this->pkg_proxy_specified_ = x;
+  }
+
+  inline const path& common_options::
+  git () const
+  {
+    return this->git_;
+  }
+
+  inline path& common_options::
+  git ()
+  {
+    return this->git_;
+  }
+
+  inline void common_options::
+  git (const path& x)
+  {
+    this->git_ = x;
+  }
+
+  inline bool common_options::
+  git_specified () const
+  {
+    return this->git_specified_;
+  }
+
+  inline void common_options::
+  git_specified (bool x)
+  {
+    this->git_specified_ = x;
+  }
+
+  inline const strings& common_options::
+  git_option () const
+  {
+    return this->git_option_;
+  }
+
+  inline strings& common_options::
+  git_option ()
+  {
+    return this->git_option_;
+  }
+
+  inline void common_options::
+  git_option (const strings& x)
+  {
+    this->git_option_ = x;
+  }
+
+  inline bool common_options::
+  git_option_specified () const
+  {
+    return this->git_option_specified_;
+  }
+
+  inline void common_options::
+  git_option_specified (bool x)
+  {
+    this->git_option_specified_ = x;
+  }
+
+  inline const path& common_options::
+  sha256 () const
+  {
+    return this->sha256_;
+  }
+
+  inline path& common_options::
+  sha256 ()
+  {
+    return this->sha256_;
+  }
+
+  inline void common_options::
+  sha256 (const path& x)
+  {
+    this->sha256_ = x;
+  }
+
+  inline bool common_options::
+  sha256_specified () const
+  {
+    return this->sha256_specified_;
+  }
+
+  inline void common_options::
+  sha256_specified (bool x)
+  {
+    this->sha256_specified_ = x;
+  }
+
+  inline const strings& common_options::
+  sha256_option () const
+  {
+    return this->sha256_option_;
+  }
+
+  inline strings& common_options::
+  sha256_option ()
+  {
+    return this->sha256_option_;
+  }
+
+  inline void common_options::
+  sha256_option (const strings& x)
+  {
+    this->sha256_option_ = x;
+  }
+
+  inline bool common_options::
+  sha256_option_specified () const
+  {
+    return this->sha256_option_specified_;
+  }
+
+  inline void common_options::
+  sha256_option_specified (bool x)
+  {
+    this->sha256_option_specified_ = x;
+  }
+
+  inline const path& common_options::
+  tar () const
+  {
+    return this->tar_;
+  }
+
+  inline path& common_options::
+  tar ()
+  {
+    return this->tar_;
+  }
+
+  inline void common_options::
+  tar (const path& x)
+  {
+    this->tar_ = x;
+  }
+
+  inline bool common_options::
+  tar_specified () const
+  {
+    return this->tar_specified_;
+  }
+
+  inline void common_options::
+  tar_specified (bool x)
+  {
+    this->tar_specified_ = x;
+  }
+
+  inline const strings& common_options::
+  tar_option () const
+  {
+    return this->tar_option_;
+  }
+
+  inline strings& common_options::
+  tar_option ()
+  {
+    return this->tar_option_;
+  }
+
+  inline void common_options::
+  tar_option (const strings& x)
+  {
+    this->tar_option_ = x;
+  }
+
+  inline bool common_options::
+  tar_option_specified () const
+  {
+    return this->tar_option_specified_;
+  }
+
+  inline void common_options::
+  tar_option_specified (bool x)
+  {
+    this->tar_option_specified_ = x;
+  }
+
+  inline const qualified_option<openssl_commands, path>& common_options::
+  openssl () const
+  {
+    return this->openssl_;
+  }
+
+  inline qualified_option<openssl_commands, path>& common_options::
+  openssl ()
+  {
+    return this->openssl_;
+  }
+
+  inline void common_options::
+  openssl (const qualified_option<openssl_commands, path>& x)
+  {
+    this->openssl_ = x;
+  }
+
+  inline bool common_options::
+  openssl_specified () const
+  {
+    return this->openssl_specified_;
+  }
+
+  inline void common_options::
+  openssl_specified (bool x)
+  {
+    this->openssl_specified_ = x;
+  }
+
+  inline const qualified_option<openssl_commands, strings>& common_options::
+  openssl_option () const
+  {
+    return this->openssl_option_;
+  }
+
+  inline qualified_option<openssl_commands, strings>& common_options::
+  openssl_option ()
+  {
+    return this->openssl_option_;
+  }
+
+  inline void common_options::
+  openssl_option (const qualified_option<openssl_commands, strings>& x)
+  {
+    this->openssl_option_ = x;
+  }
+
+  inline bool common_options::
+  openssl_option_specified () const
+  {
+    return this->openssl_option_specified_;
+  }
+
+  inline void common_options::
+  openssl_option_specified (bool x)
+  {
+    this->openssl_option_specified_ = x;
+  }
+
+  inline const bpkg::auth& common_options::
+  auth () const
+  {
+    return this->auth_;
+  }
+
+  inline bpkg::auth& common_options::
+  auth ()
+  {
+    return this->auth_;
+  }
+
+  inline void common_options::
+  auth (const bpkg::auth& x)
+  {
+    this->auth_ = x;
+  }
+
+  inline bool common_options::
+  auth_specified () const
+  {
+    return this->auth_specified_;
+  }
+
+  inline void common_options::
+  auth_specified (bool x)
+  {
+    this->auth_specified_ = x;
+  }
+
+  inline const std::set<string, icase_compare_string>& common_options::
+  trust () const
+  {
+    return this->trust_;
+  }
+
+  inline std::set<string, icase_compare_string>& common_options::
+  trust ()
+  {
+    return this->trust_;
+  }
+
+  inline void common_options::
+  trust (const std::set<string, icase_compare_string>& x)
+  {
+    this->trust_ = x;
+  }
+
+  inline bool common_options::
+  trust_specified () const
+  {
+    return this->trust_specified_;
+  }
+
+  inline void common_options::
+  trust_specified (bool x)
+  {
+    this->trust_specified_ = x;
+  }
+
+  inline const bool& common_options::
+  trust_yes () const
+  {
+    return this->trust_yes_;
+  }
+
+  inline bool& common_options::
+  trust_yes ()
+  {
+    return this->trust_yes_;
+  }
+
+  inline void common_options::
+  trust_yes (const bool& x)
+  {
+    this->trust_yes_ = x;
+  }
+
+  inline const bool& common_options::
+  trust_no () const
+  {
+    return this->trust_no_;
+  }
+
+  inline bool& common_options::
+  trust_no ()
+  {
+    return this->trust_no_;
+  }
+
+  inline void common_options::
+  trust_no (const bool& x)
+  {
+    this->trust_no_ = x;
+  }
+
+  inline const string& common_options::
+  pager () const
+  {
+    return this->pager_;
+  }
+
+  inline string& common_options::
+  pager ()
+  {
+    return this->pager_;
+  }
+
+  inline void common_options::
+  pager (const string& x)
+  {
+    this->pager_ = x;
+  }
+
+  inline bool common_options::
+  pager_specified () const
+  {
+    return this->pager_specified_;
+  }
+
+  inline void common_options::
+  pager_specified (bool x)
+  {
+    this->pager_specified_ = x;
+  }
+
+  inline const strings& common_options::
+  pager_option () const
+  {
+    return this->pager_option_;
+  }
+
+  inline strings& common_options::
+  pager_option ()
+  {
+    return this->pager_option_;
+  }
+
+  inline void common_options::
+  pager_option (const strings& x)
+  {
+    this->pager_option_ = x;
+  }
+
+  inline bool common_options::
+  pager_option_specified () const
+  {
+    return this->pager_option_specified_;
+  }
+
+  inline void common_options::
+  pager_option_specified (bool x)
+  {
+    this->pager_option_specified_ = x;
+  }
+
+  inline const string& common_options::
+  options_file () const
+  {
+    return this->options_file_;
+  }
+
+  inline string& common_options::
+  options_file ()
+  {
+    return this->options_file_;
+  }
+
+  inline void common_options::
+  options_file (const string& x)
+  {
+    this->options_file_ = x;
+  }
+
+  inline bool common_options::
+  options_file_specified () const
+  {
+    return this->options_file_specified_;
+  }
+
+  inline void common_options::
+  options_file_specified (bool x)
+  {
+    this->options_file_specified_ = x;
+  }
+
+  inline const dir_path& common_options::
+  default_options () const
+  {
+    return this->default_options_;
+  }
+
+  inline dir_path& common_options::
+  default_options ()
+  {
+    return this->default_options_;
+  }
+
+  inline void common_options::
+  default_options (const dir_path& x)
+  {
+    this->default_options_ = x;
+  }
+
+  inline bool common_options::
+  default_options_specified () const
+  {
+    return this->default_options_specified_;
+  }
+
+  inline void common_options::
+  default_options_specified (bool x)
+  {
+    this->default_options_specified_ = x;
+  }
+
+  inline const bool& common_options::
+  no_default_options () const
+  {
+    return this->no_default_options_;
+  }
+
+  inline bool& common_options::
+  no_default_options ()
+  {
+    return this->no_default_options_;
+  }
+
+  inline void common_options::
+  no_default_options (const bool& x)
+  {
+    this->no_default_options_ = x;
+  }
+}
+
+// Begin epilogue.
+//
+//
+// End epilogue.
diff --git a/bpkg/configuration-options.cxx b/bpkg/configuration-options.cxx
new file mode 100644
index 0000000..de581d0
--- /dev/null
+++ b/bpkg/configuration-options.cxx
@@ -0,0 +1,564 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+// Begin prologue.
+//
+#include <bpkg/types-parsers.hxx>
+//
+// End prologue.
+
+#include <bpkg/configuration-options.hxx>
+
+#include <map>
+#include <set>
+#include <string>
+#include <vector>
+#include <utility>
+#include <ostream>
+#include <sstream>
+
+namespace bpkg
+{
+  namespace cli
+  {
+    template <typename X>
+    struct parser
+    {
+      static void
+      parse (X& x, bool& xs, scanner& s)
+      {
+        using namespace std;
+
+        const char* o (s.next ());
+        if (s.more ())
+        {
+          string v (s.next ());
+          istringstream is (v);
+          if (!(is >> x && is.peek () == istringstream::traits_type::eof ()))
+            throw invalid_value (o, v);
+        }
+        else
+          throw missing_value (o);
+
+        xs = true;
+      }
+
+      static void
+      merge (X& b, const X& a)
+      {
+        b = a;
+      }
+    };
+
+    template <>
+    struct parser<bool>
+    {
+      static void
+      parse (bool& x, scanner& s)
+      {
+        s.next ();
+        x = true;
+      }
+
+      static void
+      merge (bool& b, const bool&)
+      {
+        b = true;
+      }
+    };
+
+    template <>
+    struct parser<std::string>
+    {
+      static void
+      parse (std::string& x, bool& xs, scanner& s)
+      {
+        const char* o (s.next ());
+
+        if (s.more ())
+          x = s.next ();
+        else
+          throw missing_value (o);
+
+        xs = true;
+      }
+
+      static void
+      merge (std::string& b, const std::string& a)
+      {
+        b = a;
+      }
+    };
+
+    template <typename X>
+    struct parser<std::pair<X, std::size_t> >
+    {
+      static void
+      parse (std::pair<X, std::size_t>& x, bool& xs, scanner& s)
+      {
+        x.second = s.position ();
+        parser<X>::parse (x.first, xs, s);
+      }
+
+      static void
+      merge (std::pair<X, std::size_t>& b, const std::pair<X, std::size_t>& a)
+      {
+        b = a;
+      }
+    };
+
+    template <typename X>
+    struct parser<std::vector<X> >
+    {
+      static void
+      parse (std::vector<X>& c, bool& xs, scanner& s)
+      {
+        X x;
+        bool dummy;
+        parser<X>::parse (x, dummy, s);
+        c.push_back (x);
+        xs = true;
+      }
+
+      static void
+      merge (std::vector<X>& b, const std::vector<X>& a)
+      {
+        b.insert (b.end (), a.begin (), a.end ());
+      }
+    };
+
+    template <typename X, typename C>
+    struct parser<std::set<X, C> >
+    {
+      static void
+      parse (std::set<X, C>& c, bool& xs, scanner& s)
+      {
+        X x;
+        bool dummy;
+        parser<X>::parse (x, dummy, s);
+        c.insert (x);
+        xs = true;
+      }
+
+      static void
+      merge (std::set<X, C>& b, const std::set<X, C>& a)
+      {
+        b.insert (a.begin (), a.end ());
+      }
+    };
+
+    template <typename K, typename V, typename C>
+    struct parser<std::map<K, V, C> >
+    {
+      static void
+      parse (std::map<K, V, C>& m, bool& xs, scanner& s)
+      {
+        const char* o (s.next ());
+
+        if (s.more ())
+        {
+          std::size_t pos (s.position ());
+          std::string ov (s.next ());
+          std::string::size_type p = ov.find ('=');
+
+          K k = K ();
+          V v = V ();
+          std::string kstr (ov, 0, p);
+          std::string vstr (ov, (p != std::string::npos ? p + 1 : ov.size ()));
+
+          int ac (2);
+          char* av[] =
+          {
+            const_cast<char*> (o),
+            0
+          };
+
+          bool dummy;
+          if (!kstr.empty ())
+          {
+            av[1] = const_cast<char*> (kstr.c_str ());
+            argv_scanner s (0, ac, av, false, pos);
+            parser<K>::parse (k, dummy, s);
+          }
+
+          if (!vstr.empty ())
+          {
+            av[1] = const_cast<char*> (vstr.c_str ());
+            argv_scanner s (0, ac, av, false, pos);
+            parser<V>::parse (v, dummy, s);
+          }
+
+          m[k] = v;
+        }
+        else
+          throw missing_value (o);
+
+        xs = true;
+      }
+
+      static void
+      merge (std::map<K, V, C>& b, const std::map<K, V, C>& a)
+      {
+        for (typename std::map<K, V, C>::const_iterator i (a.begin ()); 
+             i != a.end (); 
+             ++i)
+          b[i->first] = i->second;
+      }
+    };
+
+    template <typename X, typename T, T X::*M>
+    void
+    thunk (X& x, scanner& s)
+    {
+      parser<T>::parse (x.*M, s);
+    }
+
+    template <typename X, typename T, T X::*M, bool X::*S>
+    void
+    thunk (X& x, scanner& s)
+    {
+      parser<T>::parse (x.*M, x.*S, s);
+    }
+  }
+}
+
+#include <map>
+#include <cstring>
+
+namespace bpkg
+{
+  // configuration_options
+  //
+
+  configuration_options::
+  configuration_options ()
+  : directory_ ("."),
+    directory_specified_ (false)
+  {
+  }
+
+  bool configuration_options::
+  parse (int& argc,
+         char** argv,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  bool configuration_options::
+  parse (int start,
+         int& argc,
+         char** argv,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (start, argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  bool configuration_options::
+  parse (int& argc,
+         char** argv,
+         int& end,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    end = s.end ();
+    return r;
+  }
+
+  bool configuration_options::
+  parse (int start,
+         int& argc,
+         char** argv,
+         int& end,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (start, argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    end = s.end ();
+    return r;
+  }
+
+  bool configuration_options::
+  parse (::bpkg::cli::scanner& s,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  void configuration_options::
+  merge (const configuration_options& a)
+  {
+    CLI_POTENTIALLY_UNUSED (a);
+
+    // common_options base
+    //
+    ::bpkg::common_options::merge (a);
+
+    if (a.directory_specified_)
+    {
+      ::bpkg::cli::parser< dir_path>::merge (
+        this->directory_, a.directory_);
+      this->directory_specified_ = true;
+    }
+  }
+
+  ::bpkg::cli::usage_para configuration_options::
+  print_usage (::std::ostream& os, ::bpkg::cli::usage_para p)
+  {
+    CLI_POTENTIALLY_UNUSED (os);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1m--directory\033[0m|\033[1m-d\033[0m \033[4mdir\033[0m       Assume configuration is in \033[4mdir\033[0m rather than in the" << ::std::endl
+       << "                         current working directory." << ::std::endl;
+
+    p = ::bpkg::cli::usage_para::option;
+
+    // common_options base
+    //
+    p = ::bpkg::common_options::print_usage (os, p);
+
+    return p;
+  }
+
+  typedef
+  std::map<std::string, void (*) (configuration_options&, ::bpkg::cli::scanner&)>
+  _cli_configuration_options_map;
+
+  static _cli_configuration_options_map _cli_configuration_options_map_;
+
+  struct _cli_configuration_options_map_init
+  {
+    _cli_configuration_options_map_init ()
+    {
+      _cli_configuration_options_map_["--directory"] =
+      &::bpkg::cli::thunk< configuration_options, dir_path, &configuration_options::directory_,
+        &configuration_options::directory_specified_ >;
+      _cli_configuration_options_map_["-d"] =
+      &::bpkg::cli::thunk< configuration_options, dir_path, &configuration_options::directory_,
+        &configuration_options::directory_specified_ >;
+    }
+  };
+
+  static _cli_configuration_options_map_init _cli_configuration_options_map_init_;
+
+  bool configuration_options::
+  _parse (const char* o, ::bpkg::cli::scanner& s)
+  {
+    _cli_configuration_options_map::const_iterator i (_cli_configuration_options_map_.find (o));
+
+    if (i != _cli_configuration_options_map_.end ())
+    {
+      (*(i->second)) (*this, s);
+      return true;
+    }
+
+    // common_options base
+    //
+    if (::bpkg::common_options::_parse (o, s))
+      return true;
+
+    return false;
+  }
+
+  bool configuration_options::
+  _parse (::bpkg::cli::scanner& s,
+          ::bpkg::cli::unknown_mode opt_mode,
+          ::bpkg::cli::unknown_mode arg_mode)
+  {
+    // Can't skip combined flags (--no-combined-flags).
+    //
+    assert (opt_mode != ::bpkg::cli::unknown_mode::skip);
+
+    bool r = false;
+    bool opt = true;
+
+    while (s.more ())
+    {
+      const char* o = s.peek ();
+
+      if (std::strcmp (o, "--") == 0)
+      {
+        opt = false;
+      }
+
+      if (opt)
+      {
+        if (_parse (o, s))
+        {
+          r = true;
+          continue;
+        }
+
+        if (std::strncmp (o, "-", 1) == 0 && o[1] != '\0')
+        {
+          // Handle combined option values.
+          //
+          std::string co;
+          if (const char* v = std::strchr (o, '='))
+          {
+            co.assign (o, 0, v - o);
+            ++v;
+
+            int ac (2);
+            char* av[] =
+            {
+              const_cast<char*> (co.c_str ()),
+              const_cast<char*> (v)
+            };
+
+            ::bpkg::cli::argv_scanner ns (0, ac, av);
+
+            if (_parse (co.c_str (), ns))
+            {
+              // Parsed the option but not its value?
+              //
+              if (ns.end () != 2)
+                throw ::bpkg::cli::invalid_value (co, v);
+
+              s.next ();
+              r = true;
+              continue;
+            }
+            else
+            {
+              // Set the unknown option and fall through.
+              //
+              o = co.c_str ();
+            }
+          }
+
+          // Handle combined flags.
+          //
+          char cf[3];
+          {
+            const char* p = o + 1;
+            for (; *p != '\0'; ++p)
+            {
+              if (!((*p >= 'a' && *p <= 'z') ||
+                    (*p >= 'A' && *p <= 'Z') ||
+                    (*p >= '0' && *p <= '9')))
+                break;
+            }
+
+            if (*p == '\0')
+            {
+              for (p = o + 1; *p != '\0'; ++p)
+              {
+                std::strcpy (cf, "-");
+                cf[1] = *p;
+                cf[2] = '\0';
+
+                int ac (1);
+                char* av[] =
+                {
+                  cf
+                };
+
+                ::bpkg::cli::argv_scanner ns (0, ac, av);
+
+                if (!_parse (cf, ns))
+                  break;
+              }
+
+              if (*p == '\0')
+              {
+                // All handled.
+                //
+                s.next ();
+                r = true;
+                continue;
+              }
+              else
+              {
+                // Set the unknown option and fall through.
+                //
+                o = cf;
+              }
+            }
+          }
+
+          switch (opt_mode)
+          {
+            case ::bpkg::cli::unknown_mode::skip:
+            {
+              s.skip ();
+              r = true;
+              continue;
+            }
+            case ::bpkg::cli::unknown_mode::stop:
+            {
+              break;
+            }
+            case ::bpkg::cli::unknown_mode::fail:
+            {
+              throw ::bpkg::cli::unknown_option (o);
+            }
+          }
+
+          break;
+        }
+      }
+
+      switch (arg_mode)
+      {
+        case ::bpkg::cli::unknown_mode::skip:
+        {
+          s.skip ();
+          r = true;
+          continue;
+        }
+        case ::bpkg::cli::unknown_mode::stop:
+        {
+          break;
+        }
+        case ::bpkg::cli::unknown_mode::fail:
+        {
+          throw ::bpkg::cli::unknown_argument (o);
+        }
+      }
+
+      break;
+    }
+
+    return r;
+  }
+}
+
+namespace bpkg
+{
+  ::bpkg::cli::usage_para
+  print_configuration_usage (::std::ostream& os, ::bpkg::cli::usage_para p)
+  {
+    CLI_POTENTIALLY_UNUSED (os);
+
+    p = ::bpkg::configuration_options::print_usage (os, p);
+
+    return p;
+  }
+}
+
+// Begin epilogue.
+//
+//
+// End epilogue.
+
diff --git a/bpkg/configuration-options.hxx b/bpkg/configuration-options.hxx
new file mode 100644
index 0000000..d7a61db
--- /dev/null
+++ b/bpkg/configuration-options.hxx
@@ -0,0 +1,117 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+#ifndef BPKG_CONFIGURATION_OPTIONS_HXX
+#define BPKG_CONFIGURATION_OPTIONS_HXX
+
+// Begin prologue.
+//
+//
+// End prologue.
+
+#include <bpkg/common-options.hxx>
+
+namespace bpkg
+{
+  class configuration_options: public ::bpkg::common_options
+  {
+    public:
+    configuration_options ();
+
+    // Return true if anything has been parsed.
+    //
+    bool
+    parse (int& argc,
+           char** argv,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int start,
+           int& argc,
+           char** argv,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int& argc,
+           char** argv,
+           int& end,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int start,
+           int& argc,
+           char** argv,
+           int& end,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (::bpkg::cli::scanner&,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    // Merge options from the specified instance appending/overriding
+    // them as if they appeared after options in this instance.
+    //
+    void
+    merge (const configuration_options&);
+
+    // Option accessors.
+    //
+    const dir_path&
+    directory () const;
+
+    bool
+    directory_specified () const;
+
+    // Print usage information.
+    //
+    static ::bpkg::cli::usage_para
+    print_usage (::std::ostream&,
+                 ::bpkg::cli::usage_para = ::bpkg::cli::usage_para::none);
+
+    // Implementation details.
+    //
+    protected:
+    bool
+    _parse (const char*, ::bpkg::cli::scanner&);
+
+    private:
+    bool
+    _parse (::bpkg::cli::scanner&,
+            ::bpkg::cli::unknown_mode option,
+            ::bpkg::cli::unknown_mode argument);
+
+    public:
+    dir_path directory_;
+    bool directory_specified_;
+  };
+}
+
+// Print page usage information.
+//
+namespace bpkg
+{
+  ::bpkg::cli::usage_para
+  print_configuration_usage (::std::ostream&,
+                             ::bpkg::cli::usage_para = ::bpkg::cli::usage_para::none);
+}
+
+#include <bpkg/configuration-options.ixx>
+
+// Begin epilogue.
+//
+//
+// End epilogue.
+
+#endif // BPKG_CONFIGURATION_OPTIONS_HXX
diff --git a/bpkg/configuration-options.ixx b/bpkg/configuration-options.ixx
new file mode 100644
index 0000000..294a431
--- /dev/null
+++ b/bpkg/configuration-options.ixx
@@ -0,0 +1,33 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+// Begin prologue.
+//
+//
+// End prologue.
+
+namespace bpkg
+{
+  // configuration_options
+  //
+
+  inline const dir_path& configuration_options::
+  directory () const
+  {
+    return this->directory_;
+  }
+
+  inline bool configuration_options::
+  directory_specified () const
+  {
+    return this->directory_specified_;
+  }
+}
+
+// Begin epilogue.
+//
+//
+// End epilogue.
diff --git a/bpkg/default-options-files.cxx b/bpkg/default-options-files.cxx
new file mode 100644
index 0000000..ccdc161
--- /dev/null
+++ b/bpkg/default-options-files.cxx
@@ -0,0 +1,92 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+// Begin prologue.
+//
+#include <bpkg/types-parsers.hxx>
+//
+// End prologue.
+
+#include <bpkg/default-options-files.hxx>
+
+#include <map>
+#include <cstring>
+
+namespace bpkg
+{
+  ::bpkg::cli::usage_para
+  print_bpkg_default_options_files_usage (::std::ostream& os, ::bpkg::cli::usage_para p)
+  {
+    CLI_POTENTIALLY_UNUSED (os);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mSYNOPSIS\033[0m" << ::std::endl
+       << ::std::endl
+       << "\033[1mbpkg\033[0m \033[4mcommand\033[0m [\033[4mmode-options\033[0m] ...\033[0m" << ::std::endl
+       << ::std::endl
+       << "\033[1mDESCRIPTION\033[0m" << ::std::endl
+       << ::std::endl
+       << "Instead of having a separate config file format for tool configuration, the" << ::std::endl
+       << "\033[1mbuild2\033[0m toolchain uses \033[4mdefault options files\033[0m which contain the same options as" << ::std::endl
+       << "what can be specified on the command line. The default options files are like" << ::std::endl
+       << "options files that one can specify with \033[1m--options-file\033[0m (\033[1mbpkg-common-options(1)\033[0m)" << ::std::endl
+       << "except that they are loaded by default." << ::std::endl
+       << ::std::endl
+       << "The default options files are searched for in the \033[1m.build2/\033[0m and \033[1m.build2/local/\033[0m" << ::std::endl
+       << "subdirectories of each outer directory beginning from the \033[4mstart directory\033[0m and" << ::std::endl
+       << "until reaching either the home directory or the filesystem root directory (both" << ::std::endl
+       << "excluding). Then in the \033[1m.build2/\033[0m subdirectory of the home directory and finally" << ::std::endl
+       << "in the system directory (for example, \033[1m/etc/build2/\033[0m) if configured." << ::std::endl
+       << ::std::endl
+       << "Once the search is complete, the files are loaded in the reverse order, that" << ::std::endl
+       << "is, beginning from the system directory (if any), followed by the home" << ::std::endl
+       << "directory, ending with the start directory, and finishing off with the options" << ::std::endl
+       << "specified on the command line.  In other words, the files are loaded from the" << ::std::endl
+       << "more generic to the more specific with the command line options having the" << ::std::endl
+       << "ability to override any values specified in the default options files." << ::std::endl
+       << ::std::endl
+       << "The start directory, the names of the default options files, and in which order" << ::std::endl
+       << "they are loaded within each directory are determined by the \033[4mcommand\033[0m and" << ::std::endl
+       << "potentially its \033[4mmode-options\033[0m. See each command's DEFAULT OPTIONS FILES section" << ::std::endl
+       << "for details." << ::std::endl
+       << ::std::endl
+       << "If a default options file contains \033[1m--no-default-options\033[0m, then the search is" << ::std::endl
+       << "stopped at the directory containing this file and no outer files are loaded. If" << ::std::endl
+       << "this option is specified on the command line, then none of the default options" << ::std::endl
+       << "files are searched for or loaded." << ::std::endl
+       << ::std::endl
+       << "An additional directory containing default options files can be specified with" << ::std::endl
+       << "\033[1m--default-options\033[0m. If such a directory is a subdirectory of the start directory" << ::std::endl
+       << "or is between the start directory and the end of the outer search, then its" << ::std::endl
+       << "configuration files are loaded at the corresponding point in the directory" << ::std::endl
+       << "hierarchy. Otherwise, they are loaded after the home directory." << ::std::endl
+       << ::std::endl
+       << "The presence of the \033[1m.git\033[0m filesystem entry causes the default options files in" << ::std::endl
+       << "this directory and any of its subdirectories to be considered remote. Depending" << ::std::endl
+       << "on the command, some security-sensitive options may be disallowed or trigger a" << ::std::endl
+       << "prompt when specified in remote options files (in the current implementation" << ::std::endl
+       << "this is the case even for files from the \033[1m.build2/local/\033[0m subdirectory since the" << ::std::endl
+       << "mere location is not a sufficient ground to definitively conclude that the file" << ::std::endl
+       << "is not remote; to be sure we would need to query the version control system)." << ::std::endl
+       << "Note that additional default options files specified with \033[1m--default-options\033[0m are" << ::std::endl
+       << "never considered remote." << ::std::endl
+       << ::std::endl
+       << "The order in which default options files are loaded is traced at the verbosity" << ::std::endl
+       << "level 3 (\033[1m-V\033[0m option) or higher." << ::std::endl;
+
+    p = ::bpkg::cli::usage_para::text;
+
+    return p;
+  }
+}
+
+// Begin epilogue.
+//
+//
+// End epilogue.
+
diff --git a/bpkg/default-options-files.hxx b/bpkg/default-options-files.hxx
new file mode 100644
index 0000000..a26c600
--- /dev/null
+++ b/bpkg/default-options-files.hxx
@@ -0,0 +1,31 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+#ifndef BPKG_DEFAULT_OPTIONS_FILES_HXX
+#define BPKG_DEFAULT_OPTIONS_FILES_HXX
+
+// Begin prologue.
+//
+//
+// End prologue.
+
+#include <bpkg/common-options.hxx>
+
+// Print page usage information.
+//
+namespace bpkg
+{
+  ::bpkg::cli::usage_para
+  print_bpkg_default_options_files_usage (::std::ostream&,
+                                          ::bpkg::cli::usage_para = ::bpkg::cli::usage_para::none);
+}
+
+// Begin epilogue.
+//
+//
+// End epilogue.
+
+#endif // BPKG_DEFAULT_OPTIONS_FILES_HXX
diff --git a/bpkg/help-options.cxx b/bpkg/help-options.cxx
new file mode 100644
index 0000000..419bfc1
--- /dev/null
+++ b/bpkg/help-options.cxx
@@ -0,0 +1,568 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+// Begin prologue.
+//
+#include <bpkg/types-parsers.hxx>
+//
+// End prologue.
+
+#include <bpkg/help-options.hxx>
+
+#include <map>
+#include <set>
+#include <string>
+#include <vector>
+#include <utility>
+#include <ostream>
+#include <sstream>
+
+namespace bpkg
+{
+  namespace cli
+  {
+    template <typename X>
+    struct parser
+    {
+      static void
+      parse (X& x, bool& xs, scanner& s)
+      {
+        using namespace std;
+
+        const char* o (s.next ());
+        if (s.more ())
+        {
+          string v (s.next ());
+          istringstream is (v);
+          if (!(is >> x && is.peek () == istringstream::traits_type::eof ()))
+            throw invalid_value (o, v);
+        }
+        else
+          throw missing_value (o);
+
+        xs = true;
+      }
+
+      static void
+      merge (X& b, const X& a)
+      {
+        b = a;
+      }
+    };
+
+    template <>
+    struct parser<bool>
+    {
+      static void
+      parse (bool& x, scanner& s)
+      {
+        s.next ();
+        x = true;
+      }
+
+      static void
+      merge (bool& b, const bool&)
+      {
+        b = true;
+      }
+    };
+
+    template <>
+    struct parser<std::string>
+    {
+      static void
+      parse (std::string& x, bool& xs, scanner& s)
+      {
+        const char* o (s.next ());
+
+        if (s.more ())
+          x = s.next ();
+        else
+          throw missing_value (o);
+
+        xs = true;
+      }
+
+      static void
+      merge (std::string& b, const std::string& a)
+      {
+        b = a;
+      }
+    };
+
+    template <typename X>
+    struct parser<std::pair<X, std::size_t> >
+    {
+      static void
+      parse (std::pair<X, std::size_t>& x, bool& xs, scanner& s)
+      {
+        x.second = s.position ();
+        parser<X>::parse (x.first, xs, s);
+      }
+
+      static void
+      merge (std::pair<X, std::size_t>& b, const std::pair<X, std::size_t>& a)
+      {
+        b = a;
+      }
+    };
+
+    template <typename X>
+    struct parser<std::vector<X> >
+    {
+      static void
+      parse (std::vector<X>& c, bool& xs, scanner& s)
+      {
+        X x;
+        bool dummy;
+        parser<X>::parse (x, dummy, s);
+        c.push_back (x);
+        xs = true;
+      }
+
+      static void
+      merge (std::vector<X>& b, const std::vector<X>& a)
+      {
+        b.insert (b.end (), a.begin (), a.end ());
+      }
+    };
+
+    template <typename X, typename C>
+    struct parser<std::set<X, C> >
+    {
+      static void
+      parse (std::set<X, C>& c, bool& xs, scanner& s)
+      {
+        X x;
+        bool dummy;
+        parser<X>::parse (x, dummy, s);
+        c.insert (x);
+        xs = true;
+      }
+
+      static void
+      merge (std::set<X, C>& b, const std::set<X, C>& a)
+      {
+        b.insert (a.begin (), a.end ());
+      }
+    };
+
+    template <typename K, typename V, typename C>
+    struct parser<std::map<K, V, C> >
+    {
+      static void
+      parse (std::map<K, V, C>& m, bool& xs, scanner& s)
+      {
+        const char* o (s.next ());
+
+        if (s.more ())
+        {
+          std::size_t pos (s.position ());
+          std::string ov (s.next ());
+          std::string::size_type p = ov.find ('=');
+
+          K k = K ();
+          V v = V ();
+          std::string kstr (ov, 0, p);
+          std::string vstr (ov, (p != std::string::npos ? p + 1 : ov.size ()));
+
+          int ac (2);
+          char* av[] =
+          {
+            const_cast<char*> (o),
+            0
+          };
+
+          bool dummy;
+          if (!kstr.empty ())
+          {
+            av[1] = const_cast<char*> (kstr.c_str ());
+            argv_scanner s (0, ac, av, false, pos);
+            parser<K>::parse (k, dummy, s);
+          }
+
+          if (!vstr.empty ())
+          {
+            av[1] = const_cast<char*> (vstr.c_str ());
+            argv_scanner s (0, ac, av, false, pos);
+            parser<V>::parse (v, dummy, s);
+          }
+
+          m[k] = v;
+        }
+        else
+          throw missing_value (o);
+
+        xs = true;
+      }
+
+      static void
+      merge (std::map<K, V, C>& b, const std::map<K, V, C>& a)
+      {
+        for (typename std::map<K, V, C>::const_iterator i (a.begin ()); 
+             i != a.end (); 
+             ++i)
+          b[i->first] = i->second;
+      }
+    };
+
+    template <typename X, typename T, T X::*M>
+    void
+    thunk (X& x, scanner& s)
+    {
+      parser<T>::parse (x.*M, s);
+    }
+
+    template <typename X, typename T, T X::*M, bool X::*S>
+    void
+    thunk (X& x, scanner& s)
+    {
+      parser<T>::parse (x.*M, x.*S, s);
+    }
+  }
+}
+
+#include <map>
+#include <cstring>
+
+namespace bpkg
+{
+  // help_options
+  //
+
+  help_options::
+  help_options ()
+  {
+  }
+
+  bool help_options::
+  parse (int& argc,
+         char** argv,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  bool help_options::
+  parse (int start,
+         int& argc,
+         char** argv,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (start, argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  bool help_options::
+  parse (int& argc,
+         char** argv,
+         int& end,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    end = s.end ();
+    return r;
+  }
+
+  bool help_options::
+  parse (int start,
+         int& argc,
+         char** argv,
+         int& end,
+         bool erase,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    ::bpkg::cli::argv_scanner s (start, argc, argv, erase);
+    bool r = _parse (s, opt, arg);
+    end = s.end ();
+    return r;
+  }
+
+  bool help_options::
+  parse (::bpkg::cli::scanner& s,
+         ::bpkg::cli::unknown_mode opt,
+         ::bpkg::cli::unknown_mode arg)
+  {
+    bool r = _parse (s, opt, arg);
+    return r;
+  }
+
+  void help_options::
+  merge (const help_options& a)
+  {
+    CLI_POTENTIALLY_UNUSED (a);
+
+    // common_options base
+    //
+    ::bpkg::common_options::merge (a);
+  }
+
+  ::bpkg::cli::usage_para help_options::
+  print_usage (::std::ostream& os, ::bpkg::cli::usage_para p)
+  {
+    CLI_POTENTIALLY_UNUSED (os);
+
+    // common_options base
+    //
+    p = ::bpkg::common_options::print_usage (os, p);
+
+    return p;
+  }
+
+  typedef
+  std::map<std::string, void (*) (help_options&, ::bpkg::cli::scanner&)>
+  _cli_help_options_map;
+
+  static _cli_help_options_map _cli_help_options_map_;
+
+  struct _cli_help_options_map_init
+  {
+    _cli_help_options_map_init ()
+    {
+    }
+  };
+
+  static _cli_help_options_map_init _cli_help_options_map_init_;
+
+  bool help_options::
+  _parse (const char* o, ::bpkg::cli::scanner& s)
+  {
+    _cli_help_options_map::const_iterator i (_cli_help_options_map_.find (o));
+
+    if (i != _cli_help_options_map_.end ())
+    {
+      (*(i->second)) (*this, s);
+      return true;
+    }
+
+    // common_options base
+    //
+    if (::bpkg::common_options::_parse (o, s))
+      return true;
+
+    return false;
+  }
+
+  bool help_options::
+  _parse (::bpkg::cli::scanner& s,
+          ::bpkg::cli::unknown_mode opt_mode,
+          ::bpkg::cli::unknown_mode arg_mode)
+  {
+    // Can't skip combined flags (--no-combined-flags).
+    //
+    assert (opt_mode != ::bpkg::cli::unknown_mode::skip);
+
+    bool r = false;
+    bool opt = true;
+
+    while (s.more ())
+    {
+      const char* o = s.peek ();
+
+      if (std::strcmp (o, "--") == 0)
+      {
+        opt = false;
+      }
+
+      if (opt)
+      {
+        if (_parse (o, s))
+        {
+          r = true;
+          continue;
+        }
+
+        if (std::strncmp (o, "-", 1) == 0 && o[1] != '\0')
+        {
+          // Handle combined option values.
+          //
+          std::string co;
+          if (const char* v = std::strchr (o, '='))
+          {
+            co.assign (o, 0, v - o);
+            ++v;
+
+            int ac (2);
+            char* av[] =
+            {
+              const_cast<char*> (co.c_str ()),
+              const_cast<char*> (v)
+            };
+
+            ::bpkg::cli::argv_scanner ns (0, ac, av);
+
+            if (_parse (co.c_str (), ns))
+            {
+              // Parsed the option but not its value?
+              //
+              if (ns.end () != 2)
+                throw ::bpkg::cli::invalid_value (co, v);
+
+              s.next ();
+              r = true;
+              continue;
+            }
+            else
+            {
+              // Set the unknown option and fall through.
+              //
+              o = co.c_str ();
+            }
+          }
+
+          // Handle combined flags.
+          //
+          char cf[3];
+          {
+            const char* p = o + 1;
+            for (; *p != '\0'; ++p)
+            {
+              if (!((*p >= 'a' && *p <= 'z') ||
+                    (*p >= 'A' && *p <= 'Z') ||
+                    (*p >= '0' && *p <= '9')))
+                break;
+            }
+
+            if (*p == '\0')
+            {
+              for (p = o + 1; *p != '\0'; ++p)
+              {
+                std::strcpy (cf, "-");
+                cf[1] = *p;
+                cf[2] = '\0';
+
+                int ac (1);
+                char* av[] =
+                {
+                  cf
+                };
+
+                ::bpkg::cli::argv_scanner ns (0, ac, av);
+
+                if (!_parse (cf, ns))
+                  break;
+              }
+
+              if (*p == '\0')
+              {
+                // All handled.
+                //
+                s.next ();
+                r = true;
+                continue;
+              }
+              else
+              {
+                // Set the unknown option and fall through.
+                //
+                o = cf;
+              }
+            }
+          }
+
+          switch (opt_mode)
+          {
+            case ::bpkg::cli::unknown_mode::skip:
+            {
+              s.skip ();
+              r = true;
+              continue;
+            }
+            case ::bpkg::cli::unknown_mode::stop:
+            {
+              break;
+            }
+            case ::bpkg::cli::unknown_mode::fail:
+            {
+              throw ::bpkg::cli::unknown_option (o);
+            }
+          }
+
+          break;
+        }
+      }
+
+      switch (arg_mode)
+      {
+        case ::bpkg::cli::unknown_mode::skip:
+        {
+          s.skip ();
+          r = true;
+          continue;
+        }
+        case ::bpkg::cli::unknown_mode::stop:
+        {
+          break;
+        }
+        case ::bpkg::cli::unknown_mode::fail:
+        {
+          throw ::bpkg::cli::unknown_argument (o);
+        }
+      }
+
+      break;
+    }
+
+    return r;
+  }
+}
+
+namespace bpkg
+{
+  ::bpkg::cli::usage_para
+  print_bpkg_help_usage (::std::ostream& os, ::bpkg::cli::usage_para p)
+  {
+    CLI_POTENTIALLY_UNUSED (os);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mSYNOPSIS\033[0m" << ::std::endl
+       << ::std::endl
+       << "\033[1mbpkg help\033[0m [\033[4mcommand\033[0m | \033[4mtopic\033[0m]\033[0m" << ::std::endl
+       << ::std::endl
+       << "\033[1mDESCRIPTION\033[0m" << ::std::endl
+       << ::std::endl
+       << "Show the detailed help for \033[4mcommand\033[0m or help \033[4mtopic\033[0m or a summary of available" << ::std::endl
+       << "commands and topics if none was specified." << ::std::endl;
+
+    p = ::bpkg::help_options::print_usage (os, ::bpkg::cli::usage_para::text);
+
+    if (p != ::bpkg::cli::usage_para::none)
+      os << ::std::endl;
+
+    os << "\033[1mDEFAULT OPTIONS FILES\033[0m" << ::std::endl
+       << ::std::endl
+       << "See \033[1mbpkg-default-options-files(1)\033[0m for an overview of the default options files." << ::std::endl
+       << "For the \033[1mhelp\033[0m command the following options files are searched for only in the" << ::std::endl
+       << "predefined directories (home, system, etc) and, if found, loaded in the order" << ::std::endl
+       << "listed:" << ::std::endl
+       << ::std::endl
+       << "bpkg.options" << ::std::endl
+       << "bpkg-help.options" << ::std::endl;
+
+    p = ::bpkg::cli::usage_para::text;
+
+    return p;
+  }
+}
+
+// Begin epilogue.
+//
+//
+// End epilogue.
+
diff --git a/bpkg/help-options.hxx b/bpkg/help-options.hxx
new file mode 100644
index 0000000..9c67dee
--- /dev/null
+++ b/bpkg/help-options.hxx
@@ -0,0 +1,109 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+#ifndef BPKG_HELP_OPTIONS_HXX
+#define BPKG_HELP_OPTIONS_HXX
+
+// Begin prologue.
+//
+//
+// End prologue.
+
+#include <bpkg/common-options.hxx>
+
+namespace bpkg
+{
+  class help_options: public ::bpkg::common_options
+  {
+    public:
+    help_options ();
+
+    // Return true if anything has been parsed.
+    //
+    bool
+    parse (int& argc,
+           char** argv,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int start,
+           int& argc,
+           char** argv,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int& argc,
+           char** argv,
+           int& end,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (int start,
+           int& argc,
+           char** argv,
+           int& end,
+           bool erase = false,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    bool
+    parse (::bpkg::cli::scanner&,
+           ::bpkg::cli::unknown_mode option = ::bpkg::cli::unknown_mode::fail,
+           ::bpkg::cli::unknown_mode argument = ::bpkg::cli::unknown_mode::stop);
+
+    // Merge options from the specified instance appending/overriding
+    // them as if they appeared after options in this instance.
+    //
+    void
+    merge (const help_options&);
+
+    // Option accessors.
+    //
+    // Print usage information.
+    //
+    static ::bpkg::cli::usage_para
+    print_usage (::std::ostream&,
+                 ::bpkg::cli::usage_para = ::bpkg::cli::usage_para::none);
+
+    // Implementation details.
+    //
+    protected:
+    bool
+    _parse (const char*, ::bpkg::cli::scanner&);
+
+    private:
+    bool
+    _parse (::bpkg::cli::scanner&,
+            ::bpkg::cli::unknown_mode option,
+            ::bpkg::cli::unknown_mode argument);
+
+    public:
+  };
+}
+
+// Print page usage information.
+//
+namespace bpkg
+{
+  ::bpkg::cli::usage_para
+  print_bpkg_help_usage (::std::ostream&,
+                         ::bpkg::cli::usage_para = ::bpkg::cli::usage_para::none);
+}
+
+#include <bpkg/help-options.ixx>
+
+// Begin epilogue.
+//
+//
+// End epilogue.
+
+#endif // BPKG_HELP_OPTIONS_HXX
diff --git a/bpkg/help-options.ixx b/bpkg/help-options.ixx
new file mode 100644
index 0000000..91f5bfd
--- /dev/null
+++ b/bpkg/help-options.ixx
@@ -0,0 +1,21 @@
+// -*- C++ -*-
+//
+// This file was generated by CLI, a command line interface
+// compiler for C++.
+//
+
+// Begin prologue.
+//
+//
+// End prologue.
+
+namespace bpkg
+{
+  // help_options
+  //
+}
+
+// Begin epilogue.
+//
+//
+// End epilogue.
diff --git a/bpkg/package-odb.cxx b/bpkg/package-odb.cxx
new file mode 100644
index 0000000..3eba050
--- /dev/null
+++ b/bpkg/package-odb.cxx
@@ -0,0 +1,17091 @@
+// -*- C++ -*-
+//
+// This file was generated by ODB, object-relational mapping (ORM)
+// compiler for C++.
+//
+
+#include <odb/pre.hxx>
+
+#include <bpkg/package-odb.hxx>
+
+#include <cassert>
+#include <cstring>  // std::memcpy
+
+#include <odb/schema-catalog-impl.hxx>
+
+#include <odb/sqlite/traits.hxx>
+#include <odb/sqlite/database.hxx>
+#include <odb/sqlite/transaction.hxx>
+#include <odb/sqlite/connection.hxx>
+#include <odb/sqlite/statement.hxx>
+#include <odb/sqlite/statement-cache.hxx>
+#include <odb/sqlite/simple-object-statements.hxx>
+#include <odb/sqlite/view-statements.hxx>
+#include <odb/sqlite/container-statements.hxx>
+#include <odb/sqlite/exceptions.hxx>
+#include <odb/sqlite/prepared-query.hxx>
+#include <odb/sqlite/simple-object-result.hxx>
+#include <odb/sqlite/view-result.hxx>
+
+namespace odb
+{
+  // _version
+  //
+
+  bool access::composite_value_traits< ::bpkg::_version, id_sqlite >::
+  grow (image_type& i,
+        bool* t)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (t);
+
+    bool grew (false);
+
+    // epoch
+    //
+    t[0UL] = false;
+
+    // canonical_upstream
+    //
+    if (t[1UL])
+    {
+      i.canonical_upstream_value.capacity (i.canonical_upstream_size);
+      grew = true;
+    }
+
+    // canonical_release
+    //
+    if (t[2UL])
+    {
+      i.canonical_release_value.capacity (i.canonical_release_size);
+      grew = true;
+    }
+
+    // revision
+    //
+    t[3UL] = false;
+
+    // iteration
+    //
+    t[4UL] = false;
+
+    // upstream
+    //
+    if (t[5UL])
+    {
+      i.upstream_value.capacity (i.upstream_size);
+      grew = true;
+    }
+
+    // release
+    //
+    if (t[6UL])
+    {
+      i.release_value.capacity (i.release_size);
+      grew = true;
+    }
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::_version, id_sqlite >::
+  bind (sqlite::bind* b,
+        image_type& i,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (b);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    std::size_t n (0);
+    ODB_POTENTIALLY_UNUSED (n);
+
+    // epoch
+    //
+    b[n].type = sqlite::bind::integer;
+    b[n].buffer = &i.epoch_value;
+    b[n].is_null = &i.epoch_null;
+    n++;
+
+    // canonical_upstream
+    //
+    b[n].type = sqlite::image_traits<
+      ::std::string,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.canonical_upstream_value.data ();
+    b[n].size = &i.canonical_upstream_size;
+    b[n].capacity = i.canonical_upstream_value.capacity ();
+    b[n].is_null = &i.canonical_upstream_null;
+    n++;
+
+    // canonical_release
+    //
+    b[n].type = sqlite::image_traits<
+      ::std::string,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.canonical_release_value.data ();
+    b[n].size = &i.canonical_release_size;
+    b[n].capacity = i.canonical_release_value.capacity ();
+    b[n].is_null = &i.canonical_release_null;
+    n++;
+
+    // revision
+    //
+    b[n].type = sqlite::bind::integer;
+    b[n].buffer = &i.revision_value;
+    b[n].is_null = &i.revision_null;
+    n++;
+
+    // iteration
+    //
+    b[n].type = sqlite::bind::integer;
+    b[n].buffer = &i.iteration_value;
+    b[n].is_null = &i.iteration_null;
+    n++;
+
+    // upstream
+    //
+    b[n].type = sqlite::image_traits<
+      ::std::string,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.upstream_value.data ();
+    b[n].size = &i.upstream_size;
+    b[n].capacity = i.upstream_value.capacity ();
+    b[n].is_null = &i.upstream_null;
+    n++;
+
+    // release
+    //
+    b[n].type = sqlite::image_traits<
+      ::butl::optional< ::std::basic_string< char > >,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.release_value.data ();
+    b[n].size = &i.release_size;
+    b[n].capacity = i.release_value.capacity ();
+    b[n].is_null = &i.release_null;
+    n++;
+  }
+
+  bool access::composite_value_traits< ::bpkg::_version, id_sqlite >::
+  init (image_type& i,
+        const value_type& o,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    bool grew (false);
+
+    // epoch
+    //
+    {
+      ::uint16_t const& v =
+        o.epoch;
+
+      bool is_null (false);
+      sqlite::value_traits<
+          ::uint16_t,
+          sqlite::id_integer >::set_image (
+        i.epoch_value,
+        is_null,
+        v);
+      i.epoch_null = is_null;
+    }
+
+    // canonical_upstream
+    //
+    {
+      ::std::string const& v =
+        o.canonical_upstream;
+
+      bool is_null (false);
+      std::size_t cap (i.canonical_upstream_value.capacity ());
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_image (
+        i.canonical_upstream_value,
+        i.canonical_upstream_size,
+        is_null,
+        v);
+      i.canonical_upstream_null = is_null;
+      grew = grew || (cap != i.canonical_upstream_value.capacity ());
+    }
+
+    // canonical_release
+    //
+    {
+      ::std::string const& v =
+        o.canonical_release;
+
+      bool is_null (false);
+      std::size_t cap (i.canonical_release_value.capacity ());
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_image (
+        i.canonical_release_value,
+        i.canonical_release_size,
+        is_null,
+        v);
+      i.canonical_release_null = is_null;
+      grew = grew || (cap != i.canonical_release_value.capacity ());
+    }
+
+    // revision
+    //
+    {
+      ::butl::optional< short unsigned int > const& v =
+        o.revision;
+
+      bool is_null (true);
+      sqlite::value_traits<
+          ::butl::optional< short unsigned int >,
+          sqlite::id_integer >::set_image (
+        i.revision_value,
+        is_null,
+        v);
+      i.revision_null = is_null;
+    }
+
+    // iteration
+    //
+    {
+      ::uint32_t const& v =
+        o.iteration;
+
+      bool is_null (false);
+      sqlite::value_traits<
+          ::uint32_t,
+          sqlite::id_integer >::set_image (
+        i.iteration_value,
+        is_null,
+        v);
+      i.iteration_null = is_null;
+    }
+
+    // upstream
+    //
+    {
+      ::std::string const& v =
+        o.upstream;
+
+      bool is_null (false);
+      std::size_t cap (i.upstream_value.capacity ());
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_image (
+        i.upstream_value,
+        i.upstream_size,
+        is_null,
+        v);
+      i.upstream_null = is_null;
+      grew = grew || (cap != i.upstream_value.capacity ());
+    }
+
+    // release
+    //
+    {
+      ::butl::optional< ::std::basic_string< char > > const& v =
+        o.release;
+
+      bool is_null (true);
+      std::size_t cap (i.release_value.capacity ());
+      sqlite::value_traits<
+          ::butl::optional< ::std::basic_string< char > >,
+          sqlite::id_text >::set_image (
+        i.release_value,
+        i.release_size,
+        is_null,
+        v);
+      i.release_null = is_null;
+      grew = grew || (cap != i.release_value.capacity ());
+    }
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::_version, id_sqlite >::
+  init (value_type& o,
+        const image_type&  i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // epoch
+    //
+    {
+      ::uint16_t& v =
+        o.epoch;
+
+      sqlite::value_traits<
+          ::uint16_t,
+          sqlite::id_integer >::set_value (
+        v,
+        i.epoch_value,
+        i.epoch_null);
+    }
+
+    // canonical_upstream
+    //
+    {
+      ::std::string& v =
+        o.canonical_upstream;
+
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_value (
+        v,
+        i.canonical_upstream_value,
+        i.canonical_upstream_size,
+        i.canonical_upstream_null);
+    }
+
+    // canonical_release
+    //
+    {
+      ::std::string& v =
+        o.canonical_release;
+
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_value (
+        v,
+        i.canonical_release_value,
+        i.canonical_release_size,
+        i.canonical_release_null);
+    }
+
+    // revision
+    //
+    {
+      ::butl::optional< short unsigned int >& v =
+        o.revision;
+
+      sqlite::value_traits<
+          ::butl::optional< short unsigned int >,
+          sqlite::id_integer >::set_value (
+        v,
+        i.revision_value,
+        i.revision_null);
+    }
+
+    // iteration
+    //
+    {
+      ::uint32_t& v =
+        o.iteration;
+
+      sqlite::value_traits<
+          ::uint32_t,
+          sqlite::id_integer >::set_value (
+        v,
+        i.iteration_value,
+        i.iteration_null);
+    }
+
+    // upstream
+    //
+    {
+      ::std::string& v =
+        o.upstream;
+
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_value (
+        v,
+        i.upstream_value,
+        i.upstream_size,
+        i.upstream_null);
+    }
+
+    // release
+    //
+    {
+      ::butl::optional< ::std::basic_string< char > >& v =
+        o.release;
+
+      sqlite::value_traits<
+          ::butl::optional< ::std::basic_string< char > >,
+          sqlite::id_text >::set_value (
+        v,
+        i.release_value,
+        i.release_size,
+        i.release_null);
+    }
+  }
+
+  // version_constraint
+  //
+
+  bool access::composite_value_traits< ::bpkg::version_constraint, id_sqlite >::
+  grow (image_type& i,
+        bool* t)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (t);
+
+    bool grew (false);
+
+    // min_version
+    //
+    if (composite_value_traits< ::bpkg::_version, id_sqlite >::grow (
+          i.min_version_value, t + 0UL))
+      grew = true;
+
+    // max_version
+    //
+    if (composite_value_traits< ::bpkg::_version, id_sqlite >::grow (
+          i.max_version_value, t + 7UL))
+      grew = true;
+
+    // min_open
+    //
+    t[14UL] = false;
+
+    // max_open
+    //
+    t[15UL] = false;
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::version_constraint, id_sqlite >::
+  bind (sqlite::bind* b,
+        image_type& i,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (b);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    std::size_t n (0);
+    ODB_POTENTIALLY_UNUSED (n);
+
+    // min_version
+    //
+    composite_value_traits< ::bpkg::_version, id_sqlite >::bind (
+      b + n, i.min_version_value, sk);
+    n += 7UL;
+
+    // max_version
+    //
+    composite_value_traits< ::bpkg::_version, id_sqlite >::bind (
+      b + n, i.max_version_value, sk);
+    n += 7UL;
+
+    // min_open
+    //
+    b[n].type = sqlite::bind::integer;
+    b[n].buffer = &i.min_open_value;
+    b[n].is_null = &i.min_open_null;
+    n++;
+
+    // max_open
+    //
+    b[n].type = sqlite::bind::integer;
+    b[n].buffer = &i.max_open_value;
+    b[n].is_null = &i.max_open_null;
+    n++;
+  }
+
+  bool access::composite_value_traits< ::bpkg::version_constraint, id_sqlite >::
+  init (image_type& i,
+        const value_type& o,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    bool grew (false);
+
+    // min_version
+    //
+    {
+      ::butl::optional< ::bpkg::version > const& v =
+        o.min_version;
+
+      // From package.hxx:320:14
+      ::bpkg::_optional_version const& vt =
+        (v) ? bpkg::_version 
+      {
+         (v)->epoch, (v)->canonical_upstream, (v)->canonical_release, (v)->revision, (v)->iteration, (v)->upstream, (v)->release 
+      } : bpkg::_optional_version ();
+
+      if (wrapper_traits< ::bpkg::_optional_version >::get_null (vt))
+        composite_value_traits< ::bpkg::_version, id_sqlite >::set_null (
+          i.min_version_value, sk);
+      else
+      {
+        const::bpkg::_version& vw = 
+          wrapper_traits< ::bpkg::_optional_version >::get_ref (vt);
+
+        if (composite_value_traits< ::bpkg::_version, id_sqlite >::init (
+              i.min_version_value,
+              vw,
+              sk))
+          grew = true;
+      }
+    }
+
+    // max_version
+    //
+    {
+      ::butl::optional< ::bpkg::version > const& v =
+        o.max_version;
+
+      // From package.hxx:320:14
+      ::bpkg::_optional_version const& vt =
+        (v) ? bpkg::_version 
+      {
+         (v)->epoch, (v)->canonical_upstream, (v)->canonical_release, (v)->revision, (v)->iteration, (v)->upstream, (v)->release 
+      } : bpkg::_optional_version ();
+
+      if (wrapper_traits< ::bpkg::_optional_version >::get_null (vt))
+        composite_value_traits< ::bpkg::_version, id_sqlite >::set_null (
+          i.max_version_value, sk);
+      else
+      {
+        const::bpkg::_version& vw = 
+          wrapper_traits< ::bpkg::_optional_version >::get_ref (vt);
+
+        if (composite_value_traits< ::bpkg::_version, id_sqlite >::init (
+              i.max_version_value,
+              vw,
+              sk))
+          grew = true;
+      }
+    }
+
+    // min_open
+    //
+    {
+      bool const& v =
+        o.min_open;
+
+      bool is_null (false);
+      sqlite::value_traits<
+          bool,
+          sqlite::id_integer >::set_image (
+        i.min_open_value,
+        is_null,
+        v);
+      i.min_open_null = is_null;
+    }
+
+    // max_open
+    //
+    {
+      bool const& v =
+        o.max_open;
+
+      bool is_null (false);
+      sqlite::value_traits<
+          bool,
+          sqlite::id_integer >::set_image (
+        i.max_open_value,
+        is_null,
+        v);
+      i.max_open_null = is_null;
+    }
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::version_constraint, id_sqlite >::
+  init (value_type& o,
+        const image_type&  i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // min_version
+    //
+    {
+      ::butl::optional< ::bpkg::version >& v =
+        o.min_version;
+
+      ::bpkg::_optional_version vt;
+
+      if (composite_value_traits< ::bpkg::_version, id_sqlite >::get_null (
+            i.min_version_value))
+        wrapper_traits< ::bpkg::_optional_version >::set_null (vt);
+      else
+      {
+        ::bpkg::_version& vw =
+          wrapper_traits< ::bpkg::_optional_version >::set_ref (vt);
+
+        composite_value_traits< ::bpkg::_version, id_sqlite >::init (
+          vw,
+          i.min_version_value,
+          db);
+      }
+
+      // From package.hxx:320:14
+      v = (vt) ? bpkg::version ((vt)->epoch, std::move ((vt)->upstream), std::move ((vt)->release), (vt)->revision, (vt)->iteration) : bpkg::optional_version ();
+    }
+
+    // max_version
+    //
+    {
+      ::butl::optional< ::bpkg::version >& v =
+        o.max_version;
+
+      ::bpkg::_optional_version vt;
+
+      if (composite_value_traits< ::bpkg::_version, id_sqlite >::get_null (
+            i.max_version_value))
+        wrapper_traits< ::bpkg::_optional_version >::set_null (vt);
+      else
+      {
+        ::bpkg::_version& vw =
+          wrapper_traits< ::bpkg::_optional_version >::set_ref (vt);
+
+        composite_value_traits< ::bpkg::_version, id_sqlite >::init (
+          vw,
+          i.max_version_value,
+          db);
+      }
+
+      // From package.hxx:320:14
+      v = (vt) ? bpkg::version ((vt)->epoch, std::move ((vt)->upstream), std::move ((vt)->release), (vt)->revision, (vt)->iteration) : bpkg::optional_version ();
+    }
+
+    // min_open
+    //
+    {
+      bool& v =
+        o.min_open;
+
+      sqlite::value_traits<
+          bool,
+          sqlite::id_integer >::set_value (
+        v,
+        i.min_open_value,
+        i.min_open_null);
+    }
+
+    // max_open
+    //
+    {
+      bool& v =
+        o.max_open;
+
+      sqlite::value_traits<
+          bool,
+          sqlite::id_integer >::set_value (
+        v,
+        i.max_open_value,
+        i.max_open_null);
+    }
+  }
+
+  // dependency
+  //
+
+  bool access::composite_value_traits< ::bpkg::dependency, id_sqlite >::
+  grow (image_type& i,
+        bool* t)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (t);
+
+    bool grew (false);
+
+    // name
+    //
+    if (t[0UL])
+    {
+      i.name_value.capacity (i.name_size);
+      grew = true;
+    }
+
+    // constraint
+    //
+    if (composite_value_traits< ::bpkg::version_constraint, id_sqlite >::grow (
+          i.constraint_value, t + 1UL))
+      grew = true;
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::dependency, id_sqlite >::
+  bind (sqlite::bind* b,
+        image_type& i,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (b);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    std::size_t n (0);
+    ODB_POTENTIALLY_UNUSED (n);
+
+    // name
+    //
+    b[n].type = sqlite::image_traits<
+      ::bpkg::package_name,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.name_value.data ();
+    b[n].size = &i.name_size;
+    b[n].capacity = i.name_value.capacity ();
+    b[n].is_null = &i.name_null;
+    n++;
+
+    // constraint
+    //
+    composite_value_traits< ::bpkg::version_constraint, id_sqlite >::bind (
+      b + n, i.constraint_value, sk);
+    n += 16UL;
+  }
+
+  bool access::composite_value_traits< ::bpkg::dependency, id_sqlite >::
+  init (image_type& i,
+        const value_type& o,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    bool grew (false);
+
+    // name
+    //
+    {
+      ::bpkg::package_name const& v =
+        o.name;
+
+      bool is_null (false);
+      std::size_t cap (i.name_value.capacity ());
+      sqlite::value_traits<
+          ::bpkg::package_name,
+          sqlite::id_text >::set_image (
+        i.name_value,
+        i.name_size,
+        is_null,
+        v);
+      i.name_null = is_null;
+      grew = grew || (cap != i.name_value.capacity ());
+    }
+
+    // constraint
+    //
+    {
+      ::butl::optional< ::bpkg::version_constraint > const& v =
+        o.constraint;
+
+      if (wrapper_traits< ::butl::optional< ::bpkg::version_constraint > >::get_null (v))
+        composite_value_traits< ::bpkg::version_constraint, id_sqlite >::set_null (
+          i.constraint_value, sk);
+      else
+      {
+        const::bpkg::version_constraint& vw = 
+          wrapper_traits< ::butl::optional< ::bpkg::version_constraint > >::get_ref (v);
+
+        if (composite_value_traits< ::bpkg::version_constraint, id_sqlite >::init (
+              i.constraint_value,
+              vw,
+              sk))
+          grew = true;
+      }
+    }
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::dependency, id_sqlite >::
+  init (value_type& o,
+        const image_type&  i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // name
+    //
+    {
+      ::bpkg::package_name& v =
+        o.name;
+
+      sqlite::value_traits<
+          ::bpkg::package_name,
+          sqlite::id_text >::set_value (
+        v,
+        i.name_value,
+        i.name_size,
+        i.name_null);
+    }
+
+    // constraint
+    //
+    {
+      ::butl::optional< ::bpkg::version_constraint >& v =
+        o.constraint;
+
+      if (composite_value_traits< ::bpkg::version_constraint, id_sqlite >::get_null (
+            i.constraint_value))
+        wrapper_traits< ::butl::optional< ::bpkg::version_constraint > >::set_null (v);
+      else
+      {
+        ::bpkg::version_constraint& vw =
+          wrapper_traits< ::butl::optional< ::bpkg::version_constraint > >::set_ref (v);
+
+        composite_value_traits< ::bpkg::version_constraint, id_sqlite >::init (
+          vw,
+          i.constraint_value,
+          db);
+      }
+    }
+  }
+
+  // dependency_alternative
+  //
+
+  bool access::composite_value_traits< ::bpkg::dependency_alternative, id_sqlite >::
+  grow (image_type& i,
+        bool* t)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (t);
+
+    bool grew (false);
+
+    // enable
+    //
+    if (t[0UL])
+    {
+      i.enable_value.capacity (i.enable_size);
+      grew = true;
+    }
+
+    // reflect
+    //
+    if (t[1UL])
+    {
+      i.reflect_value.capacity (i.reflect_size);
+      grew = true;
+    }
+
+    // prefer
+    //
+    if (t[2UL])
+    {
+      i.prefer_value.capacity (i.prefer_size);
+      grew = true;
+    }
+
+    // accept
+    //
+    if (t[3UL])
+    {
+      i.accept_value.capacity (i.accept_size);
+      grew = true;
+    }
+
+    // require
+    //
+    if (t[4UL])
+    {
+      i.require_value.capacity (i.require_size);
+      grew = true;
+    }
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::dependency_alternative, id_sqlite >::
+  bind (sqlite::bind* b,
+        image_type& i,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (b);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    std::size_t n (0);
+    ODB_POTENTIALLY_UNUSED (n);
+
+    // enable
+    //
+    b[n].type = sqlite::image_traits<
+      ::butl::optional< ::std::basic_string< char > >,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.enable_value.data ();
+    b[n].size = &i.enable_size;
+    b[n].capacity = i.enable_value.capacity ();
+    b[n].is_null = &i.enable_null;
+    n++;
+
+    // reflect
+    //
+    b[n].type = sqlite::image_traits<
+      ::butl::optional< ::std::basic_string< char > >,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.reflect_value.data ();
+    b[n].size = &i.reflect_size;
+    b[n].capacity = i.reflect_value.capacity ();
+    b[n].is_null = &i.reflect_null;
+    n++;
+
+    // prefer
+    //
+    b[n].type = sqlite::image_traits<
+      ::butl::optional< ::std::basic_string< char > >,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.prefer_value.data ();
+    b[n].size = &i.prefer_size;
+    b[n].capacity = i.prefer_value.capacity ();
+    b[n].is_null = &i.prefer_null;
+    n++;
+
+    // accept
+    //
+    b[n].type = sqlite::image_traits<
+      ::butl::optional< ::std::basic_string< char > >,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.accept_value.data ();
+    b[n].size = &i.accept_size;
+    b[n].capacity = i.accept_value.capacity ();
+    b[n].is_null = &i.accept_null;
+    n++;
+
+    // require
+    //
+    b[n].type = sqlite::image_traits<
+      ::butl::optional< ::std::basic_string< char > >,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.require_value.data ();
+    b[n].size = &i.require_size;
+    b[n].capacity = i.require_value.capacity ();
+    b[n].is_null = &i.require_null;
+    n++;
+  }
+
+  bool access::composite_value_traits< ::bpkg::dependency_alternative, id_sqlite >::
+  init (image_type& i,
+        const value_type& o,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    bool grew (false);
+
+    // enable
+    //
+    {
+      ::butl::optional< ::std::basic_string< char > > const& v =
+        o.enable;
+
+      bool is_null (true);
+      std::size_t cap (i.enable_value.capacity ());
+      sqlite::value_traits<
+          ::butl::optional< ::std::basic_string< char > >,
+          sqlite::id_text >::set_image (
+        i.enable_value,
+        i.enable_size,
+        is_null,
+        v);
+      i.enable_null = is_null;
+      grew = grew || (cap != i.enable_value.capacity ());
+    }
+
+    // reflect
+    //
+    {
+      ::butl::optional< ::std::basic_string< char > > const& v =
+        o.reflect;
+
+      bool is_null (true);
+      std::size_t cap (i.reflect_value.capacity ());
+      sqlite::value_traits<
+          ::butl::optional< ::std::basic_string< char > >,
+          sqlite::id_text >::set_image (
+        i.reflect_value,
+        i.reflect_size,
+        is_null,
+        v);
+      i.reflect_null = is_null;
+      grew = grew || (cap != i.reflect_value.capacity ());
+    }
+
+    // prefer
+    //
+    {
+      ::butl::optional< ::std::basic_string< char > > const& v =
+        o.prefer;
+
+      bool is_null (true);
+      std::size_t cap (i.prefer_value.capacity ());
+      sqlite::value_traits<
+          ::butl::optional< ::std::basic_string< char > >,
+          sqlite::id_text >::set_image (
+        i.prefer_value,
+        i.prefer_size,
+        is_null,
+        v);
+      i.prefer_null = is_null;
+      grew = grew || (cap != i.prefer_value.capacity ());
+    }
+
+    // accept
+    //
+    {
+      ::butl::optional< ::std::basic_string< char > > const& v =
+        o.accept;
+
+      bool is_null (true);
+      std::size_t cap (i.accept_value.capacity ());
+      sqlite::value_traits<
+          ::butl::optional< ::std::basic_string< char > >,
+          sqlite::id_text >::set_image (
+        i.accept_value,
+        i.accept_size,
+        is_null,
+        v);
+      i.accept_null = is_null;
+      grew = grew || (cap != i.accept_value.capacity ());
+    }
+
+    // require
+    //
+    {
+      ::butl::optional< ::std::basic_string< char > > const& v =
+        o.require;
+
+      bool is_null (true);
+      std::size_t cap (i.require_value.capacity ());
+      sqlite::value_traits<
+          ::butl::optional< ::std::basic_string< char > >,
+          sqlite::id_text >::set_image (
+        i.require_value,
+        i.require_size,
+        is_null,
+        v);
+      i.require_null = is_null;
+      grew = grew || (cap != i.require_value.capacity ());
+    }
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::dependency_alternative, id_sqlite >::
+  init (value_type& o,
+        const image_type&  i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // enable
+    //
+    {
+      ::butl::optional< ::std::basic_string< char > >& v =
+        o.enable;
+
+      sqlite::value_traits<
+          ::butl::optional< ::std::basic_string< char > >,
+          sqlite::id_text >::set_value (
+        v,
+        i.enable_value,
+        i.enable_size,
+        i.enable_null);
+    }
+
+    // reflect
+    //
+    {
+      ::butl::optional< ::std::basic_string< char > >& v =
+        o.reflect;
+
+      sqlite::value_traits<
+          ::butl::optional< ::std::basic_string< char > >,
+          sqlite::id_text >::set_value (
+        v,
+        i.reflect_value,
+        i.reflect_size,
+        i.reflect_null);
+    }
+
+    // prefer
+    //
+    {
+      ::butl::optional< ::std::basic_string< char > >& v =
+        o.prefer;
+
+      sqlite::value_traits<
+          ::butl::optional< ::std::basic_string< char > >,
+          sqlite::id_text >::set_value (
+        v,
+        i.prefer_value,
+        i.prefer_size,
+        i.prefer_null);
+    }
+
+    // accept
+    //
+    {
+      ::butl::optional< ::std::basic_string< char > >& v =
+        o.accept;
+
+      sqlite::value_traits<
+          ::butl::optional< ::std::basic_string< char > >,
+          sqlite::id_text >::set_value (
+        v,
+        i.accept_value,
+        i.accept_size,
+        i.accept_null);
+    }
+
+    // require
+    //
+    {
+      ::butl::optional< ::std::basic_string< char > >& v =
+        o.require;
+
+      sqlite::value_traits<
+          ::butl::optional< ::std::basic_string< char > >,
+          sqlite::id_text >::set_value (
+        v,
+        i.require_value,
+        i.require_size,
+        i.require_null);
+    }
+  }
+
+  // dependency_alternatives
+  //
+
+  bool access::composite_value_traits< ::bpkg::dependency_alternatives, id_sqlite >::
+  grow (image_type& i,
+        bool* t)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (t);
+
+    bool grew (false);
+
+    // buildtime
+    //
+    t[0UL] = false;
+
+    // comment
+    //
+    if (t[1UL])
+    {
+      i.comment_value.capacity (i.comment_size);
+      grew = true;
+    }
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::dependency_alternatives, id_sqlite >::
+  bind (sqlite::bind* b,
+        image_type& i,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (b);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    std::size_t n (0);
+    ODB_POTENTIALLY_UNUSED (n);
+
+    // buildtime
+    //
+    b[n].type = sqlite::bind::integer;
+    b[n].buffer = &i.buildtime_value;
+    b[n].is_null = &i.buildtime_null;
+    n++;
+
+    // comment
+    //
+    b[n].type = sqlite::image_traits<
+      ::std::string,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.comment_value.data ();
+    b[n].size = &i.comment_size;
+    b[n].capacity = i.comment_value.capacity ();
+    b[n].is_null = &i.comment_null;
+    n++;
+  }
+
+  bool access::composite_value_traits< ::bpkg::dependency_alternatives, id_sqlite >::
+  init (image_type& i,
+        const value_type& o,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    bool grew (false);
+
+    // buildtime
+    //
+    {
+      bool const& v =
+        o.buildtime;
+
+      bool is_null (false);
+      sqlite::value_traits<
+          bool,
+          sqlite::id_integer >::set_image (
+        i.buildtime_value,
+        is_null,
+        v);
+      i.buildtime_null = is_null;
+    }
+
+    // comment
+    //
+    {
+      ::std::string const& v =
+        o.comment;
+
+      bool is_null (false);
+      std::size_t cap (i.comment_value.capacity ());
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_image (
+        i.comment_value,
+        i.comment_size,
+        is_null,
+        v);
+      i.comment_null = is_null;
+      grew = grew || (cap != i.comment_value.capacity ());
+    }
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::dependency_alternatives, id_sqlite >::
+  init (value_type& o,
+        const image_type&  i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // buildtime
+    //
+    {
+      bool& v =
+        o.buildtime;
+
+      sqlite::value_traits<
+          bool,
+          sqlite::id_integer >::set_value (
+        v,
+        i.buildtime_value,
+        i.buildtime_null);
+    }
+
+    // comment
+    //
+    {
+      ::std::string& v =
+        o.comment;
+
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_value (
+        v,
+        i.comment_value,
+        i.comment_size,
+        i.comment_null);
+    }
+  }
+
+  // test_dependency
+  //
+
+  bool access::composite_value_traits< ::bpkg::test_dependency, id_sqlite >::
+  grow (image_type& i,
+        bool* t)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (t);
+
+    bool grew (false);
+
+    // dependency base
+    //
+    if (composite_value_traits< ::bpkg::dependency, id_sqlite >::grow (
+          i, t + 0UL))
+      grew = true;
+
+    // type
+    //
+    if (t[17UL])
+    {
+      i.type_value.capacity (i.type_size);
+      grew = true;
+    }
+
+    // buildtime
+    //
+    t[18UL] = false;
+
+    // reflect
+    //
+    if (t[19UL])
+    {
+      i.reflect_value.capacity (i.reflect_size);
+      grew = true;
+    }
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::test_dependency, id_sqlite >::
+  bind (sqlite::bind* b,
+        image_type& i,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (b);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    std::size_t n (0);
+    ODB_POTENTIALLY_UNUSED (n);
+
+    // dependency base
+    //
+    composite_value_traits< ::bpkg::dependency, id_sqlite >::bind (b + n, i, sk);
+    n += 17UL;
+
+    // type
+    //
+    b[n].type = sqlite::image_traits<
+      ::std::string,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.type_value.data ();
+    b[n].size = &i.type_size;
+    b[n].capacity = i.type_value.capacity ();
+    b[n].is_null = &i.type_null;
+    n++;
+
+    // buildtime
+    //
+    b[n].type = sqlite::bind::integer;
+    b[n].buffer = &i.buildtime_value;
+    b[n].is_null = &i.buildtime_null;
+    n++;
+
+    // reflect
+    //
+    b[n].type = sqlite::image_traits<
+      ::butl::optional< ::std::basic_string< char > >,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.reflect_value.data ();
+    b[n].size = &i.reflect_size;
+    b[n].capacity = i.reflect_value.capacity ();
+    b[n].is_null = &i.reflect_null;
+    n++;
+  }
+
+  bool access::composite_value_traits< ::bpkg::test_dependency, id_sqlite >::
+  init (image_type& i,
+        const value_type& o,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    bool grew (false);
+
+    // dependency base
+    //
+    if (composite_value_traits< ::bpkg::dependency, id_sqlite >::init (i, o, sk))
+      grew = true;
+
+    // type
+    //
+    {
+      ::bpkg::test_dependency_type const& v =
+        o.type;
+
+      // From package.hxx:613:14
+      ::std::string const& vt =
+        to_string (v);
+
+      bool is_null (false);
+      std::size_t cap (i.type_value.capacity ());
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_image (
+        i.type_value,
+        i.type_size,
+        is_null,
+        vt);
+      i.type_null = is_null;
+      grew = grew || (cap != i.type_value.capacity ());
+    }
+
+    // buildtime
+    //
+    {
+      bool const& v =
+        o.buildtime;
+
+      bool is_null (false);
+      sqlite::value_traits<
+          bool,
+          sqlite::id_integer >::set_image (
+        i.buildtime_value,
+        is_null,
+        v);
+      i.buildtime_null = is_null;
+    }
+
+    // reflect
+    //
+    {
+      ::butl::optional< ::std::basic_string< char > > const& v =
+        o.reflect;
+
+      bool is_null (true);
+      std::size_t cap (i.reflect_value.capacity ());
+      sqlite::value_traits<
+          ::butl::optional< ::std::basic_string< char > >,
+          sqlite::id_text >::set_image (
+        i.reflect_value,
+        i.reflect_size,
+        is_null,
+        v);
+      i.reflect_null = is_null;
+      grew = grew || (cap != i.reflect_value.capacity ());
+    }
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::test_dependency, id_sqlite >::
+  init (value_type& o,
+        const image_type&  i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // dependency base
+    //
+    composite_value_traits< ::bpkg::dependency, id_sqlite >::init (o, i, db);
+
+    // type
+    //
+    {
+      ::bpkg::test_dependency_type& v =
+        o.type;
+
+      ::std::string vt;
+
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_value (
+        vt,
+        i.type_value,
+        i.type_size,
+        i.type_null);
+
+      // From package.hxx:613:14
+      v = bpkg::to_test_dependency_type (vt);
+    }
+
+    // buildtime
+    //
+    {
+      bool& v =
+        o.buildtime;
+
+      sqlite::value_traits<
+          bool,
+          sqlite::id_integer >::set_value (
+        v,
+        i.buildtime_value,
+        i.buildtime_null);
+    }
+
+    // reflect
+    //
+    {
+      ::butl::optional< ::std::basic_string< char > >& v =
+        o.reflect;
+
+      sqlite::value_traits<
+          ::butl::optional< ::std::basic_string< char > >,
+          sqlite::id_text >::set_value (
+        v,
+        i.reflect_value,
+        i.reflect_size,
+        i.reflect_null);
+    }
+  }
+
+  // configuration
+  //
+
+  struct access::object_traits_impl< ::bpkg::configuration, id_sqlite >::extra_statement_cache_type
+  {
+    extra_statement_cache_type (
+      sqlite::connection&,
+      image_type&,
+      id_image_type&,
+      sqlite::binding&,
+      sqlite::binding&)
+    {
+    }
+  };
+
+  access::object_traits_impl< ::bpkg::configuration, id_sqlite >::id_type
+  access::object_traits_impl< ::bpkg::configuration, id_sqlite >::
+  id (const id_image_type& i)
+  {
+    sqlite::database* db (0);
+    ODB_POTENTIALLY_UNUSED (db);
+
+    id_type id;
+    {
+      sqlite::value_traits<
+          ::bpkg::optional_uint64_t,
+          sqlite::id_integer >::set_value (
+        id,
+        i.id_value,
+        i.id_null);
+    }
+
+    return id;
+  }
+
+  access::object_traits_impl< ::bpkg::configuration, id_sqlite >::id_type
+  access::object_traits_impl< ::bpkg::configuration, id_sqlite >::
+  id (const image_type& i)
+  {
+    sqlite::database* db (0);
+    ODB_POTENTIALLY_UNUSED (db);
+
+    id_type id;
+    {
+      sqlite::value_traits<
+          ::bpkg::optional_uint64_t,
+          sqlite::id_integer >::set_value (
+        id,
+        i.id_value,
+        i.id_null);
+    }
+
+    return id;
+  }
+
+  bool access::object_traits_impl< ::bpkg::configuration, id_sqlite >::
+  grow (image_type& i,
+        bool* t)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (t);
+
+    bool grew (false);
+
+    // id
+    //
+    t[0UL] = false;
+
+    // uuid
+    //
+    if (t[1UL])
+    {
+      i.uuid_value.capacity (i.uuid_size);
+      grew = true;
+    }
+
+    // name
+    //
+    if (t[2UL])
+    {
+      i.name_value.capacity (i.name_size);
+      grew = true;
+    }
+
+    // type
+    //
+    if (t[3UL])
+    {
+      i.type_value.capacity (i.type_size);
+      grew = true;
+    }
+
+    // path
+    //
+    if (t[4UL])
+    {
+      i.path_value.capacity (i.path_size);
+      grew = true;
+    }
+
+    // expl
+    //
+    t[5UL] = false;
+
+    return grew;
+  }
+
+  void access::object_traits_impl< ::bpkg::configuration, id_sqlite >::
+  bind (sqlite::bind* b,
+        image_type& i,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    std::size_t n (0);
+
+    // id
+    //
+    if (sk != statement_update)
+    {
+      b[n].type = sqlite::bind::integer;
+      b[n].buffer = &i.id_value;
+      b[n].is_null = &i.id_null;
+      n++;
+    }
+
+    // uuid
+    //
+    b[n].type = sqlite::image_traits<
+      ::std::string,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.uuid_value.data ();
+    b[n].size = &i.uuid_size;
+    b[n].capacity = i.uuid_value.capacity ();
+    b[n].is_null = &i.uuid_null;
+    n++;
+
+    // name
+    //
+    b[n].type = sqlite::image_traits<
+      ::butl::optional< ::std::basic_string< char > >,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.name_value.data ();
+    b[n].size = &i.name_size;
+    b[n].capacity = i.name_value.capacity ();
+    b[n].is_null = &i.name_null;
+    n++;
+
+    // type
+    //
+    b[n].type = sqlite::image_traits<
+      ::std::string,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.type_value.data ();
+    b[n].size = &i.type_size;
+    b[n].capacity = i.type_value.capacity ();
+    b[n].is_null = &i.type_null;
+    n++;
+
+    // path
+    //
+    b[n].type = sqlite::image_traits<
+      ::std::string,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.path_value.data ();
+    b[n].size = &i.path_size;
+    b[n].capacity = i.path_value.capacity ();
+    b[n].is_null = &i.path_null;
+    n++;
+
+    // expl
+    //
+    b[n].type = sqlite::bind::integer;
+    b[n].buffer = &i.expl_value;
+    b[n].is_null = &i.expl_null;
+    n++;
+  }
+
+  void access::object_traits_impl< ::bpkg::configuration, id_sqlite >::
+  bind (sqlite::bind* b, id_image_type& i)
+  {
+    std::size_t n (0);
+    b[n].type = sqlite::bind::integer;
+    b[n].buffer = &i.id_value;
+    b[n].is_null = &i.id_null;
+  }
+
+  bool access::object_traits_impl< ::bpkg::configuration, id_sqlite >::
+  init (image_type& i,
+        const object_type& o,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    bool grew (false);
+
+    // id
+    //
+    if (sk == statement_insert)
+    {
+      ::bpkg::optional_uint64_t const& v =
+        o.id;
+
+      bool is_null (false);
+      sqlite::value_traits<
+          ::bpkg::optional_uint64_t,
+          sqlite::id_integer >::set_image (
+        i.id_value,
+        is_null,
+        v);
+      i.id_null = is_null;
+    }
+
+    // uuid
+    //
+    {
+      ::bpkg::configuration::uuid_type const& v =
+        o.uuid;
+
+      // From package.hxx:61:14
+      ::std::string const& vt =
+        (v).string ();
+
+      bool is_null (false);
+      std::size_t cap (i.uuid_value.capacity ());
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_image (
+        i.uuid_value,
+        i.uuid_size,
+        is_null,
+        vt);
+      i.uuid_null = is_null;
+      grew = grew || (cap != i.uuid_value.capacity ());
+    }
+
+    // name
+    //
+    {
+      ::butl::optional< ::std::basic_string< char > > const& v =
+        o.name;
+
+      bool is_null (true);
+      std::size_t cap (i.name_value.capacity ());
+      sqlite::value_traits<
+          ::butl::optional< ::std::basic_string< char > >,
+          sqlite::id_text >::set_image (
+        i.name_value,
+        i.name_size,
+        is_null,
+        v);
+      i.name_null = is_null;
+      grew = grew || (cap != i.name_value.capacity ());
+    }
+
+    // type
+    //
+    {
+      ::std::string const& v =
+        o.type;
+
+      bool is_null (false);
+      std::size_t cap (i.type_value.capacity ());
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_image (
+        i.type_value,
+        i.type_size,
+        is_null,
+        v);
+      i.type_null = is_null;
+      grew = grew || (cap != i.type_value.capacity ());
+    }
+
+    // path
+    //
+    {
+      ::butl::dir_path const& v =
+        o.path;
+
+      // From package.hxx:52:14
+      ::std::string const& vt =
+        (v).string ();
+
+      bool is_null (false);
+      std::size_t cap (i.path_value.capacity ());
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_image (
+        i.path_value,
+        i.path_size,
+        is_null,
+        vt);
+      i.path_null = is_null;
+      grew = grew || (cap != i.path_value.capacity ());
+    }
+
+    // expl
+    //
+    {
+      bool const& v =
+        o.expl;
+
+      bool is_null (false);
+      sqlite::value_traits<
+          bool,
+          sqlite::id_integer >::set_image (
+        i.expl_value,
+        is_null,
+        v);
+      i.expl_null = is_null;
+    }
+
+    return grew;
+  }
+
+  void access::object_traits_impl< ::bpkg::configuration, id_sqlite >::
+  init (object_type& o,
+        const image_type& i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // id
+    //
+    {
+      ::bpkg::optional_uint64_t& v =
+        o.id;
+
+      sqlite::value_traits<
+          ::bpkg::optional_uint64_t,
+          sqlite::id_integer >::set_value (
+        v,
+        i.id_value,
+        i.id_null);
+    }
+
+    // uuid
+    //
+    {
+      ::bpkg::configuration::uuid_type& v =
+        o.uuid;
+
+      ::std::string vt;
+
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_value (
+        vt,
+        i.uuid_value,
+        i.uuid_size,
+        i.uuid_null);
+
+      // From package.hxx:61:14
+      v = bpkg::uuid (vt);
+    }
+
+    // name
+    //
+    {
+      ::butl::optional< ::std::basic_string< char > >& v =
+        o.name;
+
+      sqlite::value_traits<
+          ::butl::optional< ::std::basic_string< char > >,
+          sqlite::id_text >::set_value (
+        v,
+        i.name_value,
+        i.name_size,
+        i.name_null);
+    }
+
+    // type
+    //
+    {
+      ::std::string& v =
+        o.type;
+
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_value (
+        v,
+        i.type_value,
+        i.type_size,
+        i.type_null);
+    }
+
+    // path
+    //
+    {
+      ::butl::dir_path& v =
+        o.path;
+
+      ::std::string vt;
+
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_value (
+        vt,
+        i.path_value,
+        i.path_size,
+        i.path_null);
+
+      // From package.hxx:52:14
+      v = bpkg::dir_path (vt);
+    }
+
+    // expl
+    //
+    {
+      bool& v =
+        o.expl;
+
+      sqlite::value_traits<
+          bool,
+          sqlite::id_integer >::set_value (
+        v,
+        i.expl_value,
+        i.expl_null);
+    }
+  }
+
+  void access::object_traits_impl< ::bpkg::configuration, id_sqlite >::
+  init (id_image_type& i, const id_type& id)
+  {
+    {
+      bool is_null (false);
+      sqlite::value_traits<
+          ::bpkg::optional_uint64_t,
+          sqlite::id_integer >::set_image (
+        i.id_value,
+        is_null,
+        id);
+      i.id_null = is_null;
+    }
+  }
+
+  const char access::object_traits_impl< ::bpkg::configuration, id_sqlite >::persist_statement[] =
+  "INSERT INTO \"main\".\"configuration\" "
+  "(\"id\", "
+  "\"uuid\", "
+  "\"name\", "
+  "\"type\", "
+  "\"path\", "
+  "\"explicit\") "
+  "VALUES "
+  "(?, ?, ?, ?, ?, ?)";
+
+  const char access::object_traits_impl< ::bpkg::configuration, id_sqlite >::find_statement[] =
+  "SELECT "
+  "\"main\".\"configuration\".\"id\", "
+  "\"main\".\"configuration\".\"uuid\", "
+  "\"main\".\"configuration\".\"name\", "
+  "\"main\".\"configuration\".\"type\", "
+  "\"main\".\"configuration\".\"path\", "
+  "\"main\".\"configuration\".\"explicit\" "
+  "FROM \"main\".\"configuration\" "
+  "WHERE \"main\".\"configuration\".\"id\"=?";
+
+  const char access::object_traits_impl< ::bpkg::configuration, id_sqlite >::update_statement[] =
+  "UPDATE \"main\".\"configuration\" "
+  "SET "
+  "\"uuid\"=?, "
+  "\"name\"=?, "
+  "\"type\"=?, "
+  "\"path\"=?, "
+  "\"explicit\"=? "
+  "WHERE \"id\"=?";
+
+  const char access::object_traits_impl< ::bpkg::configuration, id_sqlite >::erase_statement[] =
+  "DELETE FROM \"main\".\"configuration\" "
+  "WHERE \"id\"=?";
+
+  const char access::object_traits_impl< ::bpkg::configuration, id_sqlite >::query_statement[] =
+  "SELECT "
+  "\"main\".\"configuration\".\"id\", "
+  "\"main\".\"configuration\".\"uuid\", "
+  "\"main\".\"configuration\".\"name\", "
+  "\"main\".\"configuration\".\"type\", "
+  "\"main\".\"configuration\".\"path\", "
+  "\"main\".\"configuration\".\"explicit\" "
+  "FROM \"main\".\"configuration\"";
+
+  const char access::object_traits_impl< ::bpkg::configuration, id_sqlite >::erase_query_statement[] =
+  "DELETE FROM \"main\".\"configuration\"";
+
+  const char access::object_traits_impl< ::bpkg::configuration, id_sqlite >::table_name[] =
+  "\"main\".\"configuration\"";
+
+  void access::object_traits_impl< ::bpkg::configuration, id_sqlite >::
+  persist (database& db, object_type& obj)
+  {
+    using namespace sqlite;
+
+    sqlite::connection& conn (
+      sqlite::transaction::current ().connection (db));
+    statements_type& sts (
+      conn.statement_cache ().find_object<object_type> ());
+
+    callback (db,
+              static_cast<const object_type&> (obj),
+              callback_event::pre_persist);
+
+    image_type& im (sts.image ());
+    binding& imb (sts.insert_image_binding ());
+
+    if (init (im, obj, statement_insert))
+      im.version++;
+
+    if (im.version != sts.insert_image_version () ||
+        imb.version == 0)
+    {
+      bind (imb.bind, im, statement_insert);
+      sts.insert_image_version (im.version);
+      imb.version++;
+    }
+
+    {
+      id_image_type& i (sts.id_image ());
+      binding& b (sts.id_image_binding ());
+      if (i.version != sts.id_image_version () || b.version == 0)
+      {
+        bind (b.bind, i);
+        sts.id_image_version (i.version);
+        b.version++;
+      }
+    }
+
+    insert_statement& st (sts.persist_statement ());
+    if (!st.execute ())
+      throw object_already_persistent ();
+
+    obj.id = id (sts.id_image ());
+
+    callback (db,
+              static_cast<const object_type&> (obj),
+              callback_event::post_persist);
+  }
+
+  void access::object_traits_impl< ::bpkg::configuration, id_sqlite >::
+  update (database& db, const object_type& obj)
+  {
+    ODB_POTENTIALLY_UNUSED (db);
+
+    using namespace sqlite;
+    using sqlite::update_statement;
+
+    callback (db, obj, callback_event::pre_update);
+
+    sqlite::transaction& tr (sqlite::transaction::current ());
+    sqlite::connection& conn (tr.connection (db));
+    statements_type& sts (
+      conn.statement_cache ().find_object<object_type> ());
+
+    id_image_type& idi (sts.id_image ());
+    init (idi, id (obj));
+
+    image_type& im (sts.image ());
+    if (init (im, obj, statement_update))
+      im.version++;
+
+    bool u (false);
+    binding& imb (sts.update_image_binding ());
+    if (im.version != sts.update_image_version () ||
+        imb.version == 0)
+    {
+      bind (imb.bind, im, statement_update);
+      sts.update_image_version (im.version);
+      imb.version++;
+      u = true;
+    }
+
+    binding& idb (sts.id_image_binding ());
+    if (idi.version != sts.update_id_image_version () ||
+        idb.version == 0)
+    {
+      if (idi.version != sts.id_image_version () ||
+          idb.version == 0)
+      {
+        bind (idb.bind, idi);
+        sts.id_image_version (idi.version);
+        idb.version++;
+      }
+
+      sts.update_id_image_version (idi.version);
+
+      if (!u)
+        imb.version++;
+    }
+
+    update_statement& st (sts.update_statement ());
+    if (st.execute () == 0)
+      throw object_not_persistent ();
+
+    callback (db, obj, callback_event::post_update);
+    pointer_cache_traits::update (db, obj);
+  }
+
+  void access::object_traits_impl< ::bpkg::configuration, id_sqlite >::
+  erase (database& db, const id_type& id)
+  {
+    using namespace sqlite;
+
+    sqlite::connection& conn (
+      sqlite::transaction::current ().connection (db));
+    statements_type& sts (
+      conn.statement_cache ().find_object<object_type> ());
+
+    id_image_type& i (sts.id_image ());
+    init (i, id);
+
+    binding& idb (sts.id_image_binding ());
+    if (i.version != sts.id_image_version () || idb.version == 0)
+    {
+      bind (idb.bind, i);
+      sts.id_image_version (i.version);
+      idb.version++;
+    }
+
+    if (sts.erase_statement ().execute () != 1)
+      throw object_not_persistent ();
+
+    pointer_cache_traits::erase (db, id);
+  }
+
+  access::object_traits_impl< ::bpkg::configuration, id_sqlite >::pointer_type
+  access::object_traits_impl< ::bpkg::configuration, id_sqlite >::
+  find (database& db, const id_type& id)
+  {
+    using namespace sqlite;
+
+    {
+      pointer_type p (pointer_cache_traits::find (db, id));
+
+      if (!pointer_traits::null_ptr (p))
+        return p;
+    }
+
+    sqlite::connection& conn (
+      sqlite::transaction::current ().connection (db));
+    statements_type& sts (
+      conn.statement_cache ().find_object<object_type> ());
+
+    statements_type::auto_lock l (sts);
+
+    if (l.locked ())
+    {
+      if (!find_ (sts, &id))
+        return pointer_type ();
+    }
+
+    pointer_type p (
+      access::object_factory<object_type, pointer_type>::create ());
+    pointer_traits::guard pg (p);
+
+    pointer_cache_traits::insert_guard ig (
+      pointer_cache_traits::insert (db, id, p));
+
+    object_type& obj (pointer_traits::get_ref (p));
+
+    if (l.locked ())
+    {
+      select_statement& st (sts.find_statement ());
+      ODB_POTENTIALLY_UNUSED (st);
+
+      callback (db, obj, callback_event::pre_load);
+      init (obj, sts.image (), &db);
+      load_ (sts, obj, false);
+      sts.load_delayed (0);
+      l.unlock ();
+      callback (db, obj, callback_event::post_load);
+      pointer_cache_traits::load (ig.position ());
+    }
+    else
+      sts.delay_load (id, obj, ig.position ());
+
+    ig.release ();
+    pg.release ();
+    return p;
+  }
+
+  bool access::object_traits_impl< ::bpkg::configuration, id_sqlite >::
+  find (database& db, const id_type& id, object_type& obj)
+  {
+    using namespace sqlite;
+
+    sqlite::connection& conn (
+      sqlite::transaction::current ().connection (db));
+    statements_type& sts (
+      conn.statement_cache ().find_object<object_type> ());
+
+    statements_type::auto_lock l (sts);
+    assert (l.locked ()) /* Must be a top-level call. */;
+
+    if (!find_ (sts, &id))
+      return false;
+
+    select_statement& st (sts.find_statement ());
+    ODB_POTENTIALLY_UNUSED (st);
+
+    reference_cache_traits::position_type pos (
+      reference_cache_traits::insert (db, id, obj));
+    reference_cache_traits::insert_guard ig (pos);
+
+    callback (db, obj, callback_event::pre_load);
+    init (obj, sts.image (), &db);
+    load_ (sts, obj, false);
+    sts.load_delayed (0);
+    l.unlock ();
+    callback (db, obj, callback_event::post_load);
+    reference_cache_traits::load (pos);
+    ig.release ();
+    return true;
+  }
+
+  bool access::object_traits_impl< ::bpkg::configuration, id_sqlite >::
+  reload (database& db, object_type& obj)
+  {
+    using namespace sqlite;
+
+    sqlite::connection& conn (
+      sqlite::transaction::current ().connection (db));
+    statements_type& sts (
+      conn.statement_cache ().find_object<object_type> ());
+
+    statements_type::auto_lock l (sts);
+    assert (l.locked ()) /* Must be a top-level call. */;
+
+    const id_type& id (object_traits_impl::id (obj));
+    if (!find_ (sts, &id))
+      return false;
+
+    select_statement& st (sts.find_statement ());
+    ODB_POTENTIALLY_UNUSED (st);
+
+    callback (db, obj, callback_event::pre_load);
+    init (obj, sts.image (), &db);
+    load_ (sts, obj, true);
+    sts.load_delayed (0);
+    l.unlock ();
+    callback (db, obj, callback_event::post_load);
+    return true;
+  }
+
+  bool access::object_traits_impl< ::bpkg::configuration, id_sqlite >::
+  find_ (statements_type& sts,
+         const id_type* id)
+  {
+    using namespace sqlite;
+
+    id_image_type& i (sts.id_image ());
+    init (i, *id);
+
+    binding& idb (sts.id_image_binding ());
+    if (i.version != sts.id_image_version () || idb.version == 0)
+    {
+      bind (idb.bind, i);
+      sts.id_image_version (i.version);
+      idb.version++;
+    }
+
+    image_type& im (sts.image ());
+    binding& imb (sts.select_image_binding ());
+
+    if (im.version != sts.select_image_version () ||
+        imb.version == 0)
+    {
+      bind (imb.bind, im, statement_select);
+      sts.select_image_version (im.version);
+      imb.version++;
+    }
+
+    select_statement& st (sts.find_statement ());
+
+    st.execute ();
+    auto_result ar (st);
+    select_statement::result r (st.fetch ());
+
+    if (r == select_statement::truncated)
+    {
+      if (grow (im, sts.select_image_truncated ()))
+        im.version++;
+
+      if (im.version != sts.select_image_version ())
+      {
+        bind (imb.bind, im, statement_select);
+        sts.select_image_version (im.version);
+        imb.version++;
+        st.refetch ();
+      }
+    }
+
+    return r != select_statement::no_data;
+  }
+
+  result< access::object_traits_impl< ::bpkg::configuration, id_sqlite >::object_type >
+  access::object_traits_impl< ::bpkg::configuration, id_sqlite >::
+  query (database& db, const query_base_type& q)
+  {
+    using namespace sqlite;
+    using odb::details::shared;
+    using odb::details::shared_ptr;
+
+    sqlite::connection& conn (
+      sqlite::transaction::current ().connection (db));
+
+    statements_type& sts (
+      conn.statement_cache ().find_object<object_type> ());
+
+    image_type& im (sts.image ());
+    binding& imb (sts.select_image_binding ());
+
+    if (im.version != sts.select_image_version () ||
+        imb.version == 0)
+    {
+      bind (imb.bind, im, statement_select);
+      sts.select_image_version (im.version);
+      imb.version++;
+    }
+
+    std::string text (query_statement);
+    if (!q.empty ())
+    {
+      text += " ";
+      text += q.clause ();
+    }
+
+    q.init_parameters ();
+    shared_ptr<select_statement> st (
+      new (shared) select_statement (
+        conn,
+        text,
+        false,
+        true,
+        q.parameters_binding (),
+        imb));
+
+    st->execute ();
+
+    shared_ptr< odb::object_result_impl<object_type> > r (
+      new (shared) sqlite::object_result_impl<object_type> (
+        q, st, sts, 0));
+
+    return result<object_type> (r);
+  }
+
+  unsigned long long access::object_traits_impl< ::bpkg::configuration, id_sqlite >::
+  erase_query (database& db, const query_base_type& q)
+  {
+    using namespace sqlite;
+
+    sqlite::connection& conn (
+      sqlite::transaction::current ().connection (db));
+
+    std::string text (erase_query_statement);
+    if (!q.empty ())
+    {
+      text += ' ';
+      text += q.clause ();
+    }
+
+    q.init_parameters ();
+    delete_statement st (
+      conn,
+      text,
+      q.parameters_binding ());
+
+    return st.execute ();
+  }
+
+  odb::details::shared_ptr<prepared_query_impl>
+  access::object_traits_impl< ::bpkg::configuration, id_sqlite >::
+  prepare_query (connection& c, const char* n, const query_base_type& q)
+  {
+    using namespace sqlite;
+    using odb::details::shared;
+    using odb::details::shared_ptr;
+
+    sqlite::connection& conn (
+      static_cast<sqlite::connection&> (c));
+
+    statements_type& sts (
+      conn.statement_cache ().find_object<object_type> ());
+
+    image_type& im (sts.image ());
+    binding& imb (sts.select_image_binding ());
+
+    if (im.version != sts.select_image_version () ||
+        imb.version == 0)
+    {
+      bind (imb.bind, im, statement_select);
+      sts.select_image_version (im.version);
+      imb.version++;
+    }
+
+    std::string text (query_statement);
+    if (!q.empty ())
+    {
+      text += " ";
+      text += q.clause ();
+    }
+
+    shared_ptr<sqlite::prepared_query_impl> r (
+      new (shared) sqlite::prepared_query_impl (conn));
+    r->name = n;
+    r->execute = &execute_query;
+    r->query = q;
+    r->stmt.reset (
+      new (shared) select_statement (
+        conn,
+        text,
+        false,
+        true,
+        r->query.parameters_binding (),
+        imb));
+
+    return r;
+  }
+
+  odb::details::shared_ptr<result_impl>
+  access::object_traits_impl< ::bpkg::configuration, id_sqlite >::
+  execute_query (prepared_query_impl& q)
+  {
+    using namespace sqlite;
+    using odb::details::shared;
+    using odb::details::shared_ptr;
+
+    sqlite::prepared_query_impl& pq (
+      static_cast<sqlite::prepared_query_impl&> (q));
+    shared_ptr<select_statement> st (
+      odb::details::inc_ref (
+        static_cast<select_statement*> (pq.stmt.get ())));
+
+    sqlite::transaction& tr (sqlite::transaction::current ());
+
+    // The connection used by the current transaction and the
+    // one used to prepare this statement must be the same.
+    //
+    assert (q.verify_connection (tr));
+
+    statements_type& sts (
+      st->connection ().statement_cache ().find_object<object_type> ());
+
+    image_type& im (sts.image ());
+    binding& imb (sts.select_image_binding ());
+
+    if (im.version != sts.select_image_version () ||
+        imb.version == 0)
+    {
+      bind (imb.bind, im, statement_select);
+      sts.select_image_version (im.version);
+      imb.version++;
+    }
+
+    pq.query.init_parameters ();
+    st->execute ();
+
+    return shared_ptr<result_impl> (
+      new (shared) sqlite::object_result_impl<object_type> (
+        pq.query, st, sts, 0));
+  }
+
+  // canonical_version
+  //
+
+  bool access::composite_value_traits< ::bpkg::canonical_version, id_sqlite >::
+  grow (image_type& i,
+        bool* t)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (t);
+
+    bool grew (false);
+
+    // epoch
+    //
+    t[0UL] = false;
+
+    // canonical_upstream
+    //
+    if (t[1UL])
+    {
+      i.canonical_upstream_value.capacity (i.canonical_upstream_size);
+      grew = true;
+    }
+
+    // canonical_release
+    //
+    if (t[2UL])
+    {
+      i.canonical_release_value.capacity (i.canonical_release_size);
+      grew = true;
+    }
+
+    // revision
+    //
+    t[3UL] = false;
+
+    // iteration
+    //
+    t[4UL] = false;
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::canonical_version, id_sqlite >::
+  bind (sqlite::bind* b,
+        image_type& i,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (b);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    std::size_t n (0);
+    ODB_POTENTIALLY_UNUSED (n);
+
+    // epoch
+    //
+    b[n].type = sqlite::bind::integer;
+    b[n].buffer = &i.epoch_value;
+    b[n].is_null = &i.epoch_null;
+    n++;
+
+    // canonical_upstream
+    //
+    b[n].type = sqlite::image_traits<
+      ::std::string,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.canonical_upstream_value.data ();
+    b[n].size = &i.canonical_upstream_size;
+    b[n].capacity = i.canonical_upstream_value.capacity ();
+    b[n].is_null = &i.canonical_upstream_null;
+    n++;
+
+    // canonical_release
+    //
+    b[n].type = sqlite::image_traits<
+      ::std::string,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.canonical_release_value.data ();
+    b[n].size = &i.canonical_release_size;
+    b[n].capacity = i.canonical_release_value.capacity ();
+    b[n].is_null = &i.canonical_release_null;
+    n++;
+
+    // revision
+    //
+    b[n].type = sqlite::bind::integer;
+    b[n].buffer = &i.revision_value;
+    b[n].is_null = &i.revision_null;
+    n++;
+
+    // iteration
+    //
+    b[n].type = sqlite::bind::integer;
+    b[n].buffer = &i.iteration_value;
+    b[n].is_null = &i.iteration_null;
+    n++;
+  }
+
+  bool access::composite_value_traits< ::bpkg::canonical_version, id_sqlite >::
+  init (image_type& i,
+        const value_type& o,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    bool grew (false);
+
+    // epoch
+    //
+    {
+      ::uint16_t const& v =
+        o.epoch;
+
+      bool is_null (false);
+      sqlite::value_traits<
+          ::uint16_t,
+          sqlite::id_integer >::set_image (
+        i.epoch_value,
+        is_null,
+        v);
+      i.epoch_null = is_null;
+    }
+
+    // canonical_upstream
+    //
+    {
+      ::std::string const& v =
+        o.canonical_upstream;
+
+      bool is_null (false);
+      std::size_t cap (i.canonical_upstream_value.capacity ());
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_image (
+        i.canonical_upstream_value,
+        i.canonical_upstream_size,
+        is_null,
+        v);
+      i.canonical_upstream_null = is_null;
+      grew = grew || (cap != i.canonical_upstream_value.capacity ());
+    }
+
+    // canonical_release
+    //
+    {
+      ::std::string const& v =
+        o.canonical_release;
+
+      bool is_null (false);
+      std::size_t cap (i.canonical_release_value.capacity ());
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_image (
+        i.canonical_release_value,
+        i.canonical_release_size,
+        is_null,
+        v);
+      i.canonical_release_null = is_null;
+      grew = grew || (cap != i.canonical_release_value.capacity ());
+    }
+
+    // revision
+    //
+    {
+      ::uint16_t const& v =
+        o.revision;
+
+      bool is_null (false);
+      sqlite::value_traits<
+          ::uint16_t,
+          sqlite::id_integer >::set_image (
+        i.revision_value,
+        is_null,
+        v);
+      i.revision_null = is_null;
+    }
+
+    // iteration
+    //
+    {
+      ::uint32_t const& v =
+        o.iteration;
+
+      bool is_null (false);
+      sqlite::value_traits<
+          ::uint32_t,
+          sqlite::id_integer >::set_image (
+        i.iteration_value,
+        is_null,
+        v);
+      i.iteration_null = is_null;
+    }
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::canonical_version, id_sqlite >::
+  init (value_type& o,
+        const image_type&  i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // epoch
+    //
+    {
+      ::uint16_t& v =
+        o.epoch;
+
+      sqlite::value_traits<
+          ::uint16_t,
+          sqlite::id_integer >::set_value (
+        v,
+        i.epoch_value,
+        i.epoch_null);
+    }
+
+    // canonical_upstream
+    //
+    {
+      ::std::string& v =
+        o.canonical_upstream;
+
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_value (
+        v,
+        i.canonical_upstream_value,
+        i.canonical_upstream_size,
+        i.canonical_upstream_null);
+    }
+
+    // canonical_release
+    //
+    {
+      ::std::string& v =
+        o.canonical_release;
+
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_value (
+        v,
+        i.canonical_release_value,
+        i.canonical_release_size,
+        i.canonical_release_null);
+    }
+
+    // revision
+    //
+    {
+      ::uint16_t& v =
+        o.revision;
+
+      sqlite::value_traits<
+          ::uint16_t,
+          sqlite::id_integer >::set_value (
+        v,
+        i.revision_value,
+        i.revision_null);
+    }
+
+    // iteration
+    //
+    {
+      ::uint32_t& v =
+        o.iteration;
+
+      sqlite::value_traits<
+          ::uint32_t,
+          sqlite::id_integer >::set_value (
+        v,
+        i.iteration_value,
+        i.iteration_null);
+    }
+  }
+
+  // upstream_version
+  //
+
+  bool access::composite_value_traits< ::bpkg::upstream_version, id_sqlite >::
+  grow (image_type& i,
+        bool* t)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (t);
+
+    bool grew (false);
+
+    // upstream_
+    //
+    if (t[0UL])
+    {
+      i.upstream_value.capacity (i.upstream_size);
+      grew = true;
+    }
+
+    // release_
+    //
+    if (t[1UL])
+    {
+      i.release_value.capacity (i.release_size);
+      grew = true;
+    }
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::upstream_version, id_sqlite >::
+  bind (sqlite::bind* b,
+        image_type& i,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (b);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    std::size_t n (0);
+    ODB_POTENTIALLY_UNUSED (n);
+
+    // upstream_
+    //
+    b[n].type = sqlite::image_traits<
+      ::std::string,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.upstream_value.data ();
+    b[n].size = &i.upstream_size;
+    b[n].capacity = i.upstream_value.capacity ();
+    b[n].is_null = &i.upstream_null;
+    n++;
+
+    // release_
+    //
+    b[n].type = sqlite::image_traits<
+      ::bpkg::optional_string,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.release_value.data ();
+    b[n].size = &i.release_size;
+    b[n].capacity = i.release_value.capacity ();
+    b[n].is_null = &i.release_null;
+    n++;
+  }
+
+  bool access::composite_value_traits< ::bpkg::upstream_version, id_sqlite >::
+  init (image_type& i,
+        const value_type& o,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    bool grew (false);
+
+    // upstream_
+    //
+    {
+      // From package.hxx:271:7
+      ::std::string const& v =
+        o.upstream;
+
+      bool is_null (false);
+      std::size_t cap (i.upstream_value.capacity ());
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_image (
+        i.upstream_value,
+        i.upstream_size,
+        is_null,
+        v);
+      i.upstream_null = is_null;
+      grew = grew || (cap != i.upstream_value.capacity ());
+    }
+
+    // release_
+    //
+    {
+      // From package.hxx:276:7
+      ::bpkg::optional_string const& v =
+        o.release;
+
+      bool is_null (true);
+      std::size_t cap (i.release_value.capacity ());
+      sqlite::value_traits<
+          ::bpkg::optional_string,
+          sqlite::id_text >::set_image (
+        i.release_value,
+        i.release_size,
+        is_null,
+        v);
+      i.release_null = is_null;
+      grew = grew || (cap != i.release_value.capacity ());
+    }
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::upstream_version, id_sqlite >::
+  init (value_type& o,
+        const image_type&  i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // upstream_
+    //
+    {
+      // From package.hxx:272:7
+      ::std::string v;
+
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_value (
+        v,
+        i.upstream_value,
+        i.upstream_size,
+        i.upstream_null);
+
+      // From package.hxx:272:7
+      o = bpkg::version (0, std::move (v), std::string (), bpkg::nullopt, 0);
+    }
+
+    // release_
+    //
+    {
+      // From package.hxx:277:7
+      ::bpkg::optional_string v;
+
+      sqlite::value_traits<
+          ::bpkg::optional_string,
+          sqlite::id_text >::set_value (
+        v,
+        i.release_value,
+        i.release_size,
+        i.release_null);
+
+      // From package.hxx:277:7
+      o = bpkg::version (0, std::move (o.upstream), std::move (v), bpkg::nullopt, 0);
+    }
+  }
+
+  // _repository_location
+  //
+
+  bool access::composite_value_traits< ::bpkg::_repository_location, id_sqlite >::
+  grow (image_type& i,
+        bool* t)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (t);
+
+    bool grew (false);
+
+    // url
+    //
+    if (t[0UL])
+    {
+      i.url_value.capacity (i.url_size);
+      grew = true;
+    }
+
+    // type
+    //
+    if (t[1UL])
+    {
+      i.type_value.capacity (i.type_size);
+      grew = true;
+    }
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::_repository_location, id_sqlite >::
+  bind (sqlite::bind* b,
+        image_type& i,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (b);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    std::size_t n (0);
+    ODB_POTENTIALLY_UNUSED (n);
+
+    // url
+    //
+    b[n].type = sqlite::image_traits<
+      ::std::string,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.url_value.data ();
+    b[n].size = &i.url_size;
+    b[n].capacity = i.url_value.capacity ();
+    b[n].is_null = &i.url_null;
+    n++;
+
+    // type
+    //
+    b[n].type = sqlite::image_traits<
+      ::std::string,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.type_value.data ();
+    b[n].size = &i.type_size;
+    b[n].capacity = i.type_value.capacity ();
+    b[n].is_null = &i.type_null;
+    n++;
+  }
+
+  bool access::composite_value_traits< ::bpkg::_repository_location, id_sqlite >::
+  init (image_type& i,
+        const value_type& o,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    bool grew (false);
+
+    // url
+    //
+    {
+      ::bpkg::repository_url const& v =
+        o.url;
+
+      // From package.hxx:353:14
+      ::std::string const& vt =
+        (v).string ();
+
+      bool is_null (false);
+      std::size_t cap (i.url_value.capacity ());
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_image (
+        i.url_value,
+        i.url_size,
+        is_null,
+        vt);
+      i.url_null = is_null;
+      grew = grew || (cap != i.url_value.capacity ());
+    }
+
+    // type
+    //
+    {
+      ::bpkg::repository_type const& v =
+        o.type;
+
+      // From package.hxx:357:14
+      ::std::string const& vt =
+        to_string (v);
+
+      bool is_null (false);
+      std::size_t cap (i.type_value.capacity ());
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_image (
+        i.type_value,
+        i.type_size,
+        is_null,
+        vt);
+      i.type_null = is_null;
+      grew = grew || (cap != i.type_value.capacity ());
+    }
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::_repository_location, id_sqlite >::
+  init (value_type& o,
+        const image_type&  i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // url
+    //
+    {
+      ::bpkg::repository_url& v =
+        o.url;
+
+      ::std::string vt;
+
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_value (
+        vt,
+        i.url_value,
+        i.url_size,
+        i.url_null);
+
+      // From package.hxx:353:14
+      v = (vt).empty () ? bpkg::repository_url () : bpkg::repository_url (vt);
+    }
+
+    // type
+    //
+    {
+      ::bpkg::repository_type& v =
+        o.type;
+
+      ::std::string vt;
+
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_value (
+        vt,
+        i.type_value,
+        i.type_size,
+        i.type_null);
+
+      // From package.hxx:357:14
+      v = bpkg::to_repository_type (vt);
+    }
+  }
+
+  // repository_fragment
+  //
+
+  struct access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::extra_statement_cache_type
+  {
+    sqlite::container_statements_impl< complements_traits > complements;
+    sqlite::container_statements_impl< prerequisites_traits > prerequisites;
+
+    extra_statement_cache_type (
+      sqlite::connection& c,
+      image_type&,
+      id_image_type&,
+      sqlite::binding& id,
+      sqlite::binding&)
+    : complements (c, id),
+      prerequisites (c, id)
+    {
+    }
+  };
+
+  // complements
+  //
+
+  const char access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::complements_traits::
+  select_statement[] =
+  "SELECT "
+  "\"main\".\"repository_fragment_complements\".\"complement\" "
+  "FROM \"main\".\"repository_fragment_complements\" "
+  "WHERE \"main\".\"repository_fragment_complements\".\"repository_fragment\"=?";
+
+  const char access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::complements_traits::
+  insert_statement[] =
+  "INSERT INTO \"main\".\"repository_fragment_complements\" "
+  "(\"repository_fragment\", "
+  "\"complement\") "
+  "VALUES "
+  "(?, ?)";
+
+  const char access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::complements_traits::
+  delete_statement[] =
+  "DELETE FROM \"main\".\"repository_fragment_complements\" "
+  "WHERE \"repository_fragment\"=?";
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::complements_traits::
+  bind (sqlite::bind* b,
+        const sqlite::bind* id,
+        std::size_t id_size,
+        data_image_type& d)
+  {
+    using namespace sqlite;
+
+    statement_kind sk (statement_select);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    size_t n (0);
+
+    // object_id
+    //
+    if (id != 0)
+      std::memcpy (&b[n], id, id_size * sizeof (id[0]));
+    n += id_size;
+
+    // value
+    //
+    b[n].type = sqlite::image_traits<
+      ::std::string,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = d.value_value.data ();
+    b[n].size = &d.value_size;
+    b[n].capacity = d.value_value.capacity ();
+    b[n].is_null = &d.value_null;
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::complements_traits::
+  grow (data_image_type& i,
+        bool* t)
+  {
+    bool grew (false);
+
+    // value
+    //
+    if (t[0UL])
+    {
+      i.value_value.capacity (i.value_size);
+      grew = true;
+    }
+
+    if (grew)
+      i.version++;
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::complements_traits::
+  init (data_image_type& i,
+        const value_type& v)
+  {
+    using namespace sqlite;
+
+    statement_kind sk (statement_insert);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    bool grew (false);
+
+    // value
+    //
+    {
+      typedef object_traits< ::bpkg::repository > obj_traits;
+      typedef odb::pointer_traits< value_type > wptr_traits;
+      typedef odb::pointer_traits< wptr_traits::strong_pointer_type > ptr_traits;
+
+      wptr_traits::strong_pointer_type sp (wptr_traits::lock (v));
+      bool is_null (ptr_traits::null_ptr (sp));
+      if (!is_null)
+      {
+        const obj_traits::id_type& ptr_id (
+          ptr_traits::object_id< ptr_traits::element_type  > (sp));
+
+        std::size_t cap (i.value_value.capacity ());
+        sqlite::value_traits<
+            obj_traits::id_type,
+            sqlite::id_text >::set_image (
+          i.value_value,
+          i.value_size,
+          is_null,
+          ptr_id);
+        i.value_null = is_null;
+        grew = grew || (cap != i.value_value.capacity ());
+      }
+      else
+        throw null_pointer ();
+    }
+
+    if (grew)
+      i.version++;
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::complements_traits::
+  init (value_type& v,
+        const data_image_type& i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // value
+    //
+    {
+      typedef object_traits< ::bpkg::repository > obj_traits;
+      typedef odb::pointer_traits< value_type > ptr_traits;
+
+      if (i.value_null)
+        v = ptr_traits::pointer_type ();
+      else
+      {
+        obj_traits::id_type ptr_id;
+        sqlite::value_traits<
+            obj_traits::id_type,
+            sqlite::id_text >::set_value (
+          ptr_id,
+          i.value_value,
+          i.value_size,
+          i.value_null);
+
+        v = ptr_traits::pointer_type (
+          *static_cast<sqlite::database*> (db), ptr_id);
+      }
+    }
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::complements_traits::
+  insert (const value_type& v, void* d)
+  {
+    using namespace sqlite;
+
+    statements_type& sts (*static_cast< statements_type* > (d));
+    data_image_type& di (sts.data_image ());
+
+    init (di, v);
+
+    if (sts.data_binding_test_version ())
+    {
+      const binding& id (sts.id_binding ());
+      bind (sts.data_bind (), id.bind, id.count, di);
+      sts.data_binding_update_version ();
+    }
+
+    if (!sts.insert_statement ().execute ())
+      throw object_already_persistent ();
+  }
+
+  bool access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::complements_traits::
+  select (value_type& v, void* d)
+  {
+    using namespace sqlite;
+    using sqlite::select_statement;
+
+    statements_type& sts (*static_cast< statements_type* > (d));
+    data_image_type& di (sts.data_image ());
+
+    init (v, di, &sts.connection ().database ());
+
+    select_statement& st (sts.select_statement ());
+    select_statement::result r (st.fetch ());
+
+    if (r == select_statement::truncated)
+    {
+      grow (di, sts.select_image_truncated ());
+
+      if (sts.data_binding_test_version ())
+      {
+        bind (sts.data_bind (), 0, sts.id_binding ().count, di);
+        sts.data_binding_update_version ();
+        st.refetch ();
+      }
+    }
+
+    return r != select_statement::no_data;
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::complements_traits::
+  delete_ (void* d)
+  {
+    using namespace sqlite;
+
+    statements_type& sts (*static_cast< statements_type* > (d));
+    sts.delete_statement ().execute ();
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::complements_traits::
+  persist (const container_type& c,
+           statements_type& sts)
+  {
+    using namespace sqlite;
+
+    functions_type& fs (sts.functions ());
+    container_traits_type::persist (c, fs);
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::complements_traits::
+  load (container_type& c,
+        statements_type& sts)
+  {
+    using namespace sqlite;
+    using sqlite::select_statement;
+
+    const binding& id (sts.id_binding ());
+
+    if (sts.data_binding_test_version ())
+    {
+      bind (sts.data_bind (), id.bind, id.count, sts.data_image ());
+      sts.data_binding_update_version ();
+    }
+
+    select_statement& st (sts.select_statement ());
+    st.execute ();
+    auto_result ar (st);
+    select_statement::result r (st.fetch ());
+
+    if (r == select_statement::truncated)
+    {
+      data_image_type& di (sts.data_image ());
+      grow (di, sts.select_image_truncated ());
+
+      if (sts.data_binding_test_version ())
+      {
+        bind (sts.data_bind (), 0, id.count, di);
+        sts.data_binding_update_version ();
+        st.refetch ();
+      }
+    }
+
+    bool more (r != select_statement::no_data);
+
+    functions_type& fs (sts.functions ());
+    container_traits_type::load (c, more, fs);
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::complements_traits::
+  update (const container_type& c,
+          statements_type& sts)
+  {
+    using namespace sqlite;
+
+    functions_type& fs (sts.functions ());
+    container_traits_type::update (c, fs);
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::complements_traits::
+  erase (statements_type& sts)
+  {
+    using namespace sqlite;
+
+    functions_type& fs (sts.functions ());
+    container_traits_type::erase (fs);
+  }
+
+  // prerequisites
+  //
+
+  const char access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::prerequisites_traits::
+  select_statement[] =
+  "SELECT "
+  "\"main\".\"repository_fragment_prerequisites\".\"prerequisite\" "
+  "FROM \"main\".\"repository_fragment_prerequisites\" "
+  "WHERE \"main\".\"repository_fragment_prerequisites\".\"repository_fragment\"=?";
+
+  const char access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::prerequisites_traits::
+  insert_statement[] =
+  "INSERT INTO \"main\".\"repository_fragment_prerequisites\" "
+  "(\"repository_fragment\", "
+  "\"prerequisite\") "
+  "VALUES "
+  "(?, ?)";
+
+  const char access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::prerequisites_traits::
+  delete_statement[] =
+  "DELETE FROM \"main\".\"repository_fragment_prerequisites\" "
+  "WHERE \"repository_fragment\"=?";
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::prerequisites_traits::
+  bind (sqlite::bind* b,
+        const sqlite::bind* id,
+        std::size_t id_size,
+        data_image_type& d)
+  {
+    using namespace sqlite;
+
+    statement_kind sk (statement_select);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    size_t n (0);
+
+    // object_id
+    //
+    if (id != 0)
+      std::memcpy (&b[n], id, id_size * sizeof (id[0]));
+    n += id_size;
+
+    // value
+    //
+    b[n].type = sqlite::image_traits<
+      ::std::string,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = d.value_value.data ();
+    b[n].size = &d.value_size;
+    b[n].capacity = d.value_value.capacity ();
+    b[n].is_null = &d.value_null;
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::prerequisites_traits::
+  grow (data_image_type& i,
+        bool* t)
+  {
+    bool grew (false);
+
+    // value
+    //
+    if (t[0UL])
+    {
+      i.value_value.capacity (i.value_size);
+      grew = true;
+    }
+
+    if (grew)
+      i.version++;
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::prerequisites_traits::
+  init (data_image_type& i,
+        const value_type& v)
+  {
+    using namespace sqlite;
+
+    statement_kind sk (statement_insert);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    bool grew (false);
+
+    // value
+    //
+    {
+      typedef object_traits< ::bpkg::repository > obj_traits;
+      typedef odb::pointer_traits< value_type > wptr_traits;
+      typedef odb::pointer_traits< wptr_traits::strong_pointer_type > ptr_traits;
+
+      wptr_traits::strong_pointer_type sp (wptr_traits::lock (v));
+      bool is_null (ptr_traits::null_ptr (sp));
+      if (!is_null)
+      {
+        const obj_traits::id_type& ptr_id (
+          ptr_traits::object_id< ptr_traits::element_type  > (sp));
+
+        std::size_t cap (i.value_value.capacity ());
+        sqlite::value_traits<
+            obj_traits::id_type,
+            sqlite::id_text >::set_image (
+          i.value_value,
+          i.value_size,
+          is_null,
+          ptr_id);
+        i.value_null = is_null;
+        grew = grew || (cap != i.value_value.capacity ());
+      }
+      else
+        throw null_pointer ();
+    }
+
+    if (grew)
+      i.version++;
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::prerequisites_traits::
+  init (value_type& v,
+        const data_image_type& i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // value
+    //
+    {
+      typedef object_traits< ::bpkg::repository > obj_traits;
+      typedef odb::pointer_traits< value_type > ptr_traits;
+
+      if (i.value_null)
+        v = ptr_traits::pointer_type ();
+      else
+      {
+        obj_traits::id_type ptr_id;
+        sqlite::value_traits<
+            obj_traits::id_type,
+            sqlite::id_text >::set_value (
+          ptr_id,
+          i.value_value,
+          i.value_size,
+          i.value_null);
+
+        v = ptr_traits::pointer_type (
+          *static_cast<sqlite::database*> (db), ptr_id);
+      }
+    }
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::prerequisites_traits::
+  insert (const value_type& v, void* d)
+  {
+    using namespace sqlite;
+
+    statements_type& sts (*static_cast< statements_type* > (d));
+    data_image_type& di (sts.data_image ());
+
+    init (di, v);
+
+    if (sts.data_binding_test_version ())
+    {
+      const binding& id (sts.id_binding ());
+      bind (sts.data_bind (), id.bind, id.count, di);
+      sts.data_binding_update_version ();
+    }
+
+    if (!sts.insert_statement ().execute ())
+      throw object_already_persistent ();
+  }
+
+  bool access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::prerequisites_traits::
+  select (value_type& v, void* d)
+  {
+    using namespace sqlite;
+    using sqlite::select_statement;
+
+    statements_type& sts (*static_cast< statements_type* > (d));
+    data_image_type& di (sts.data_image ());
+
+    init (v, di, &sts.connection ().database ());
+
+    select_statement& st (sts.select_statement ());
+    select_statement::result r (st.fetch ());
+
+    if (r == select_statement::truncated)
+    {
+      grow (di, sts.select_image_truncated ());
+
+      if (sts.data_binding_test_version ())
+      {
+        bind (sts.data_bind (), 0, sts.id_binding ().count, di);
+        sts.data_binding_update_version ();
+        st.refetch ();
+      }
+    }
+
+    return r != select_statement::no_data;
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::prerequisites_traits::
+  delete_ (void* d)
+  {
+    using namespace sqlite;
+
+    statements_type& sts (*static_cast< statements_type* > (d));
+    sts.delete_statement ().execute ();
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::prerequisites_traits::
+  persist (const container_type& c,
+           statements_type& sts)
+  {
+    using namespace sqlite;
+
+    functions_type& fs (sts.functions ());
+    container_traits_type::persist (c, fs);
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::prerequisites_traits::
+  load (container_type& c,
+        statements_type& sts)
+  {
+    using namespace sqlite;
+    using sqlite::select_statement;
+
+    const binding& id (sts.id_binding ());
+
+    if (sts.data_binding_test_version ())
+    {
+      bind (sts.data_bind (), id.bind, id.count, sts.data_image ());
+      sts.data_binding_update_version ();
+    }
+
+    select_statement& st (sts.select_statement ());
+    st.execute ();
+    auto_result ar (st);
+    select_statement::result r (st.fetch ());
+
+    if (r == select_statement::truncated)
+    {
+      data_image_type& di (sts.data_image ());
+      grow (di, sts.select_image_truncated ());
+
+      if (sts.data_binding_test_version ())
+      {
+        bind (sts.data_bind (), 0, id.count, di);
+        sts.data_binding_update_version ();
+        st.refetch ();
+      }
+    }
+
+    bool more (r != select_statement::no_data);
+
+    functions_type& fs (sts.functions ());
+    container_traits_type::load (c, more, fs);
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::prerequisites_traits::
+  update (const container_type& c,
+          statements_type& sts)
+  {
+    using namespace sqlite;
+
+    functions_type& fs (sts.functions ());
+    container_traits_type::update (c, fs);
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::prerequisites_traits::
+  erase (statements_type& sts)
+  {
+    using namespace sqlite;
+
+    functions_type& fs (sts.functions ());
+    container_traits_type::erase (fs);
+  }
+
+  access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::id_type
+  access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::
+  id (const image_type& i)
+  {
+    sqlite::database* db (0);
+    ODB_POTENTIALLY_UNUSED (db);
+
+    id_type id;
+    {
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_value (
+        id,
+        i.name_value,
+        i.name_size,
+        i.name_null);
+    }
+
+    return id;
+  }
+
+  bool access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::
+  grow (image_type& i,
+        bool* t)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (t);
+
+    bool grew (false);
+
+    // name
+    //
+    if (t[0UL])
+    {
+      i.name_value.capacity (i.name_size);
+      grew = true;
+    }
+
+    // location
+    //
+    if (composite_value_traits< ::bpkg::_repository_location, id_sqlite >::grow (
+          i.location_value, t + 1UL))
+      grew = true;
+
+    return grew;
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::
+  bind (sqlite::bind* b,
+        image_type& i,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    std::size_t n (0);
+
+    // name
+    //
+    if (sk != statement_update)
+    {
+      b[n].type = sqlite::image_traits<
+        ::std::string,
+        sqlite::id_text>::bind_value;
+      b[n].buffer = i.name_value.data ();
+      b[n].size = &i.name_size;
+      b[n].capacity = i.name_value.capacity ();
+      b[n].is_null = &i.name_null;
+      n++;
+    }
+
+    // location
+    //
+    composite_value_traits< ::bpkg::_repository_location, id_sqlite >::bind (
+      b + n, i.location_value, sk);
+    n += 2UL;
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::
+  bind (sqlite::bind* b, id_image_type& i)
+  {
+    std::size_t n (0);
+    b[n].type = sqlite::image_traits<
+      ::std::string,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.id_value.data ();
+    b[n].size = &i.id_size;
+    b[n].capacity = i.id_value.capacity ();
+    b[n].is_null = &i.id_null;
+  }
+
+  bool access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::
+  init (image_type& i,
+        const object_type& o,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    bool grew (false);
+
+    // name
+    //
+    if (sk == statement_insert)
+    {
+      ::std::string const& v =
+        o.name;
+
+      bool is_null (false);
+      std::size_t cap (i.name_value.capacity ());
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_image (
+        i.name_value,
+        i.name_size,
+        is_null,
+        v);
+      i.name_null = is_null;
+      grew = grew || (cap != i.name_value.capacity ());
+    }
+
+    // location
+    //
+    {
+      ::bpkg::repository_location const& v =
+        o.location;
+
+      // From package.hxx:363:14
+      ::bpkg::_repository_location const& vt =
+        bpkg::_repository_location 
+      {
+         (v).url (), (v).empty () ? bpkg::repository_type::pkg : (v).type () 
+      };
+
+
+      if (composite_value_traits< ::bpkg::_repository_location, id_sqlite >::init (
+            i.location_value,
+            vt,
+            sk))
+        grew = true;
+    }
+
+    return grew;
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::
+  init (object_type& o,
+        const image_type& i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // name
+    //
+    {
+      ::std::string& v =
+        o.name;
+
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_value (
+        v,
+        i.name_value,
+        i.name_size,
+        i.name_null);
+    }
+
+    // location
+    //
+    {
+      // From package.hxx:432:7
+      ::bpkg::repository_location v;
+
+      ::bpkg::_repository_location vt;
+
+      composite_value_traits< ::bpkg::_repository_location, id_sqlite >::init (
+        vt,
+        i.location_value,
+        db);
+
+      // From package.hxx:363:14
+      v = bpkg::repository_location (std::move ((vt).url), (vt).type);
+      // From package.hxx:432:7
+      o.location = std::move (v);
+      assert (o.name == o.location.canonical_name ());
+    }
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::
+  init (id_image_type& i, const id_type& id)
+  {
+    bool grew (false);
+    {
+      bool is_null (false);
+      std::size_t cap (i.id_value.capacity ());
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_image (
+        i.id_value,
+        i.id_size,
+        is_null,
+        id);
+      i.id_null = is_null;
+      grew = grew || (cap != i.id_value.capacity ());
+    }
+
+    if (grew)
+      i.version++;
+  }
+
+  const char access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::persist_statement[] =
+  "INSERT INTO \"main\".\"repository_fragment\" "
+  "(\"name\", "
+  "\"url\", "
+  "\"type\") "
+  "VALUES "
+  "(?, ?, ?)";
+
+  const char access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::find_statement[] =
+  "SELECT "
+  "\"main\".\"repository_fragment\".\"name\", "
+  "\"main\".\"repository_fragment\".\"url\", "
+  "\"main\".\"repository_fragment\".\"type\" "
+  "FROM \"main\".\"repository_fragment\" "
+  "WHERE \"main\".\"repository_fragment\".\"name\"=?";
+
+  const char access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::update_statement[] =
+  "UPDATE \"main\".\"repository_fragment\" "
+  "SET "
+  "\"url\"=?, "
+  "\"type\"=? "
+  "WHERE \"name\"=?";
+
+  const char access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::erase_statement[] =
+  "DELETE FROM \"main\".\"repository_fragment\" "
+  "WHERE \"name\"=?";
+
+  const char access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::query_statement[] =
+  "SELECT "
+  "\"main\".\"repository_fragment\".\"name\", "
+  "\"main\".\"repository_fragment\".\"url\", "
+  "\"main\".\"repository_fragment\".\"type\" "
+  "FROM \"main\".\"repository_fragment\"";
+
+  const char access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::erase_query_statement[] =
+  "DELETE FROM \"main\".\"repository_fragment\"";
+
+  const char access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::table_name[] =
+  "\"main\".\"repository_fragment\"";
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::
+  persist (database& db, const object_type& obj)
+  {
+    using namespace sqlite;
+
+    sqlite::connection& conn (
+      sqlite::transaction::current ().connection (db));
+    statements_type& sts (
+      conn.statement_cache ().find_object<object_type> ());
+
+    callback (db,
+              obj,
+              callback_event::pre_persist);
+
+    image_type& im (sts.image ());
+    binding& imb (sts.insert_image_binding ());
+
+    if (init (im, obj, statement_insert))
+      im.version++;
+
+    if (im.version != sts.insert_image_version () ||
+        imb.version == 0)
+    {
+      bind (imb.bind, im, statement_insert);
+      sts.insert_image_version (im.version);
+      imb.version++;
+    }
+
+    insert_statement& st (sts.persist_statement ());
+    if (!st.execute ())
+      throw object_already_persistent ();
+
+    id_image_type& i (sts.id_image ());
+    init (i, id (obj));
+
+    binding& idb (sts.id_image_binding ());
+    if (i.version != sts.id_image_version () || idb.version == 0)
+    {
+      bind (idb.bind, i);
+      sts.id_image_version (i.version);
+      idb.version++;
+    }
+
+    extra_statement_cache_type& esc (sts.extra_statement_cache ());
+
+    // complements
+    //
+    {
+      ::bpkg::repository_fragment::dependencies const& v =
+        obj.complements;
+
+      complements_traits::persist (
+        v,
+        esc.complements);
+    }
+
+    // prerequisites
+    //
+    {
+      ::bpkg::repository_fragment::dependencies const& v =
+        obj.prerequisites;
+
+      prerequisites_traits::persist (
+        v,
+        esc.prerequisites);
+    }
+
+    callback (db,
+              obj,
+              callback_event::post_persist);
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::
+  update (database& db, const object_type& obj)
+  {
+    ODB_POTENTIALLY_UNUSED (db);
+
+    using namespace sqlite;
+    using sqlite::update_statement;
+
+    callback (db, obj, callback_event::pre_update);
+
+    sqlite::transaction& tr (sqlite::transaction::current ());
+    sqlite::connection& conn (tr.connection (db));
+    statements_type& sts (
+      conn.statement_cache ().find_object<object_type> ());
+
+    id_image_type& idi (sts.id_image ());
+    init (idi, id (obj));
+
+    image_type& im (sts.image ());
+    if (init (im, obj, statement_update))
+      im.version++;
+
+    bool u (false);
+    binding& imb (sts.update_image_binding ());
+    if (im.version != sts.update_image_version () ||
+        imb.version == 0)
+    {
+      bind (imb.bind, im, statement_update);
+      sts.update_image_version (im.version);
+      imb.version++;
+      u = true;
+    }
+
+    binding& idb (sts.id_image_binding ());
+    if (idi.version != sts.update_id_image_version () ||
+        idb.version == 0)
+    {
+      if (idi.version != sts.id_image_version () ||
+          idb.version == 0)
+      {
+        bind (idb.bind, idi);
+        sts.id_image_version (idi.version);
+        idb.version++;
+      }
+
+      sts.update_id_image_version (idi.version);
+
+      if (!u)
+        imb.version++;
+    }
+
+    update_statement& st (sts.update_statement ());
+    if (st.execute () == 0)
+      throw object_not_persistent ();
+
+    extra_statement_cache_type& esc (sts.extra_statement_cache ());
+
+    // complements
+    //
+    {
+      ::bpkg::repository_fragment::dependencies const& v =
+        obj.complements;
+
+      complements_traits::update (
+        v,
+        esc.complements);
+    }
+
+    // prerequisites
+    //
+    {
+      ::bpkg::repository_fragment::dependencies const& v =
+        obj.prerequisites;
+
+      prerequisites_traits::update (
+        v,
+        esc.prerequisites);
+    }
+
+    callback (db, obj, callback_event::post_update);
+    pointer_cache_traits::update (db, obj);
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::
+  erase (database& db, const id_type& id)
+  {
+    using namespace sqlite;
+
+    sqlite::connection& conn (
+      sqlite::transaction::current ().connection (db));
+    statements_type& sts (
+      conn.statement_cache ().find_object<object_type> ());
+
+    id_image_type& i (sts.id_image ());
+    init (i, id);
+
+    binding& idb (sts.id_image_binding ());
+    if (i.version != sts.id_image_version () || idb.version == 0)
+    {
+      bind (idb.bind, i);
+      sts.id_image_version (i.version);
+      idb.version++;
+    }
+
+    extra_statement_cache_type& esc (sts.extra_statement_cache ());
+
+    // complements
+    //
+    {
+      complements_traits::erase (
+        esc.complements);
+    }
+
+    // prerequisites
+    //
+    {
+      prerequisites_traits::erase (
+        esc.prerequisites);
+    }
+
+    if (sts.erase_statement ().execute () != 1)
+      throw object_not_persistent ();
+
+    pointer_cache_traits::erase (db, id);
+  }
+
+  access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::pointer_type
+  access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::
+  find (database& db, const id_type& id)
+  {
+    using namespace sqlite;
+
+    {
+      pointer_type p (pointer_cache_traits::find (db, id));
+
+      if (!pointer_traits::null_ptr (p))
+        return p;
+    }
+
+    sqlite::connection& conn (
+      sqlite::transaction::current ().connection (db));
+    statements_type& sts (
+      conn.statement_cache ().find_object<object_type> ());
+
+    statements_type::auto_lock l (sts);
+
+    if (l.locked ())
+    {
+      if (!find_ (sts, &id))
+        return pointer_type ();
+    }
+
+    pointer_type p (
+      access::object_factory<object_type, pointer_type>::create ());
+    pointer_traits::guard pg (p);
+
+    pointer_cache_traits::insert_guard ig (
+      pointer_cache_traits::insert (db, id, p));
+
+    object_type& obj (pointer_traits::get_ref (p));
+
+    if (l.locked ())
+    {
+      select_statement& st (sts.find_statement ());
+      ODB_POTENTIALLY_UNUSED (st);
+
+      callback (db, obj, callback_event::pre_load);
+      init (obj, sts.image (), &db);
+      load_ (sts, obj, false);
+      sts.load_delayed (0);
+      l.unlock ();
+      callback (db, obj, callback_event::post_load);
+      pointer_cache_traits::load (ig.position ());
+    }
+    else
+      sts.delay_load (id, obj, ig.position ());
+
+    ig.release ();
+    pg.release ();
+    return p;
+  }
+
+  bool access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::
+  find (database& db, const id_type& id, object_type& obj)
+  {
+    using namespace sqlite;
+
+    sqlite::connection& conn (
+      sqlite::transaction::current ().connection (db));
+    statements_type& sts (
+      conn.statement_cache ().find_object<object_type> ());
+
+    statements_type::auto_lock l (sts);
+    assert (l.locked ()) /* Must be a top-level call. */;
+
+    if (!find_ (sts, &id))
+      return false;
+
+    select_statement& st (sts.find_statement ());
+    ODB_POTENTIALLY_UNUSED (st);
+
+    reference_cache_traits::position_type pos (
+      reference_cache_traits::insert (db, id, obj));
+    reference_cache_traits::insert_guard ig (pos);
+
+    callback (db, obj, callback_event::pre_load);
+    init (obj, sts.image (), &db);
+    load_ (sts, obj, false);
+    sts.load_delayed (0);
+    l.unlock ();
+    callback (db, obj, callback_event::post_load);
+    reference_cache_traits::load (pos);
+    ig.release ();
+    return true;
+  }
+
+  bool access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::
+  reload (database& db, object_type& obj)
+  {
+    using namespace sqlite;
+
+    sqlite::connection& conn (
+      sqlite::transaction::current ().connection (db));
+    statements_type& sts (
+      conn.statement_cache ().find_object<object_type> ());
+
+    statements_type::auto_lock l (sts);
+    assert (l.locked ()) /* Must be a top-level call. */;
+
+    const id_type& id (object_traits_impl::id (obj));
+    if (!find_ (sts, &id))
+      return false;
+
+    select_statement& st (sts.find_statement ());
+    ODB_POTENTIALLY_UNUSED (st);
+
+    callback (db, obj, callback_event::pre_load);
+    init (obj, sts.image (), &db);
+    load_ (sts, obj, true);
+    sts.load_delayed (0);
+    l.unlock ();
+    callback (db, obj, callback_event::post_load);
+    return true;
+  }
+
+  bool access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::
+  find_ (statements_type& sts,
+         const id_type* id)
+  {
+    using namespace sqlite;
+
+    id_image_type& i (sts.id_image ());
+    init (i, *id);
+
+    binding& idb (sts.id_image_binding ());
+    if (i.version != sts.id_image_version () || idb.version == 0)
+    {
+      bind (idb.bind, i);
+      sts.id_image_version (i.version);
+      idb.version++;
+    }
+
+    image_type& im (sts.image ());
+    binding& imb (sts.select_image_binding ());
+
+    if (im.version != sts.select_image_version () ||
+        imb.version == 0)
+    {
+      bind (imb.bind, im, statement_select);
+      sts.select_image_version (im.version);
+      imb.version++;
+    }
+
+    select_statement& st (sts.find_statement ());
+
+    st.execute ();
+    auto_result ar (st);
+    select_statement::result r (st.fetch ());
+
+    if (r == select_statement::truncated)
+    {
+      if (grow (im, sts.select_image_truncated ()))
+        im.version++;
+
+      if (im.version != sts.select_image_version ())
+      {
+        bind (imb.bind, im, statement_select);
+        sts.select_image_version (im.version);
+        imb.version++;
+        st.refetch ();
+      }
+    }
+
+    return r != select_statement::no_data;
+  }
+
+  void access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::
+  load_ (statements_type& sts,
+         object_type& obj,
+         bool reload)
+  {
+    ODB_POTENTIALLY_UNUSED (reload);
+
+    extra_statement_cache_type& esc (sts.extra_statement_cache ());
+
+    // complements
+    //
+    {
+      ::bpkg::repository_fragment::dependencies& v =
+        obj.complements;
+
+      complements_traits::load (
+        v,
+        esc.complements);
+    }
+
+    // prerequisites
+    //
+    {
+      ::bpkg::repository_fragment::dependencies& v =
+        obj.prerequisites;
+
+      prerequisites_traits::load (
+        v,
+        esc.prerequisites);
+    }
+  }
+
+  result< access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::object_type >
+  access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::
+  query (database& db, const query_base_type& q)
+  {
+    using namespace sqlite;
+    using odb::details::shared;
+    using odb::details::shared_ptr;
+
+    sqlite::connection& conn (
+      sqlite::transaction::current ().connection (db));
+
+    statements_type& sts (
+      conn.statement_cache ().find_object<object_type> ());
+
+    image_type& im (sts.image ());
+    binding& imb (sts.select_image_binding ());
+
+    if (im.version != sts.select_image_version () ||
+        imb.version == 0)
+    {
+      bind (imb.bind, im, statement_select);
+      sts.select_image_version (im.version);
+      imb.version++;
+    }
+
+    std::string text (query_statement);
+    if (!q.empty ())
+    {
+      text += " ";
+      text += q.clause ();
+    }
+
+    q.init_parameters ();
+    shared_ptr<select_statement> st (
+      new (shared) select_statement (
+        conn,
+        text,
+        false,
+        true,
+        q.parameters_binding (),
+        imb));
+
+    st->execute ();
+
+    shared_ptr< odb::object_result_impl<object_type> > r (
+      new (shared) sqlite::object_result_impl<object_type> (
+        q, st, sts, 0));
+
+    return result<object_type> (r);
+  }
+
+  unsigned long long access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::
+  erase_query (database& db, const query_base_type& q)
+  {
+    using namespace sqlite;
+
+    sqlite::connection& conn (
+      sqlite::transaction::current ().connection (db));
+
+    std::string text (erase_query_statement);
+    if (!q.empty ())
+    {
+      text += ' ';
+      text += q.clause ();
+    }
+
+    q.init_parameters ();
+    delete_statement st (
+      conn,
+      text,
+      q.parameters_binding ());
+
+    return st.execute ();
+  }
+
+  odb::details::shared_ptr<prepared_query_impl>
+  access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::
+  prepare_query (connection& c, const char* n, const query_base_type& q)
+  {
+    using namespace sqlite;
+    using odb::details::shared;
+    using odb::details::shared_ptr;
+
+    sqlite::connection& conn (
+      static_cast<sqlite::connection&> (c));
+
+    statements_type& sts (
+      conn.statement_cache ().find_object<object_type> ());
+
+    image_type& im (sts.image ());
+    binding& imb (sts.select_image_binding ());
+
+    if (im.version != sts.select_image_version () ||
+        imb.version == 0)
+    {
+      bind (imb.bind, im, statement_select);
+      sts.select_image_version (im.version);
+      imb.version++;
+    }
+
+    std::string text (query_statement);
+    if (!q.empty ())
+    {
+      text += " ";
+      text += q.clause ();
+    }
+
+    shared_ptr<sqlite::prepared_query_impl> r (
+      new (shared) sqlite::prepared_query_impl (conn));
+    r->name = n;
+    r->execute = &execute_query;
+    r->query = q;
+    r->stmt.reset (
+      new (shared) select_statement (
+        conn,
+        text,
+        false,
+        true,
+        r->query.parameters_binding (),
+        imb));
+
+    return r;
+  }
+
+  odb::details::shared_ptr<result_impl>
+  access::object_traits_impl< ::bpkg::repository_fragment, id_sqlite >::
+  execute_query (prepared_query_impl& q)
+  {
+    using namespace sqlite;
+    using odb::details::shared;
+    using odb::details::shared_ptr;
+
+    sqlite::prepared_query_impl& pq (
+      static_cast<sqlite::prepared_query_impl&> (q));
+    shared_ptr<select_statement> st (
+      odb::details::inc_ref (
+        static_cast<select_statement*> (pq.stmt.get ())));
+
+    sqlite::transaction& tr (sqlite::transaction::current ());
+
+    // The connection used by the current transaction and the
+    // one used to prepare this statement must be the same.
+    //
+    assert (q.verify_connection (tr));
+
+    statements_type& sts (
+      st->connection ().statement_cache ().find_object<object_type> ());
+
+    image_type& im (sts.image ());
+    binding& imb (sts.select_image_binding ());
+
+    if (im.version != sts.select_image_version () ||
+        imb.version == 0)
+    {
+      bind (imb.bind, im, statement_select);
+      sts.select_image_version (im.version);
+      imb.version++;
+    }
+
+    pq.query.init_parameters ();
+    st->execute ();
+
+    return shared_ptr<result_impl> (
+      new (shared) sqlite::object_result_impl<object_type> (
+        pq.query, st, sts, 0));
+  }
+
+  // repository_fragment_count
+  //
+
+  bool access::view_traits_impl< ::bpkg::repository_fragment_count, id_sqlite >::
+  grow (image_type& i,
+        bool* t)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (t);
+
+    bool grew (false);
+
+    // result
+    //
+    t[0UL] = false;
+
+    return grew;
+  }
+
+  void access::view_traits_impl< ::bpkg::repository_fragment_count, id_sqlite >::
+  bind (sqlite::bind* b,
+        image_type& i)
+  {
+    using namespace sqlite;
+
+    sqlite::statement_kind sk (statement_select);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    std::size_t n (0);
+
+    // result
+    //
+    b[n].type = sqlite::bind::integer;
+    b[n].buffer = &i.result_value;
+    b[n].is_null = &i.result_null;
+    n++;
+  }
+
+  void access::view_traits_impl< ::bpkg::repository_fragment_count, id_sqlite >::
+  init (view_type& o,
+        const image_type& i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // result
+    //
+    {
+      ::std::size_t& v =
+        o.result;
+
+      sqlite::value_traits<
+          ::std::size_t,
+          sqlite::id_integer >::set_value (
+        v,
+        i.result_value,
+        i.result_null);
+    }
+  }
+
+  access::view_traits_impl< ::bpkg::repository_fragment_count, id_sqlite >::query_base_type
+  access::view_traits_impl< ::bpkg::repository_fragment_count, id_sqlite >::
+  query_statement (const query_base_type& q)
+  {
+    query_base_type r (
+      "SELECT "
+      "count(*) ");
+
+    r += "FROM \"main\".\"repository_fragment\"";
+
+    query_base_type c (
+      // From package.hxx:447:5
+      query_columns::name != "" && (q.empty () ? query_base_type::true_expr : q));
+
+    c.optimize ();
+
+    if (!c.empty ())
+    {
+      r += " ";
+      r += c.clause_prefix ();
+      r += c;
+    }
+
+    return r;
+  }
+
+  result< access::view_traits_impl< ::bpkg::repository_fragment_count, id_sqlite >::view_type >
+  access::view_traits_impl< ::bpkg::repository_fragment_count, id_sqlite >::
+  query (database& db, const query_base_type& q)
+  {
+    using namespace sqlite;
+    using odb::details::shared;
+    using odb::details::shared_ptr;
+
+    sqlite::connection& conn (
+      sqlite::transaction::current ().connection (db));
+    statements_type& sts (
+      conn.statement_cache ().find_view<view_type> ());
+
+    image_type& im (sts.image ());
+    binding& imb (sts.image_binding ());
+
+    if (im.version != sts.image_version () || imb.version == 0)
+    {
+      bind (imb.bind, im);
+      sts.image_version (im.version);
+      imb.version++;
+    }
+
+    const query_base_type& qs (query_statement (q));
+    qs.init_parameters ();
+    shared_ptr<select_statement> st (
+      new (shared) select_statement (
+        conn,
+        qs.clause (),
+        false,
+        true,
+        qs.parameters_binding (),
+        imb));
+
+    st->execute ();
+
+    shared_ptr< odb::view_result_impl<view_type> > r (
+      new (shared) sqlite::view_result_impl<view_type> (
+        qs, st, sts, 0));
+
+    return result<view_type> (r);
+  }
+
+  odb::details::shared_ptr<prepared_query_impl>
+  access::view_traits_impl< ::bpkg::repository_fragment_count, id_sqlite >::
+  prepare_query (connection& c, const char* n, const query_base_type& q)
+  {
+    using namespace sqlite;
+    using odb::details::shared;
+    using odb::details::shared_ptr;
+
+    sqlite::connection& conn (
+      static_cast<sqlite::connection&> (c));
+    statements_type& sts (
+      conn.statement_cache ().find_view<view_type> ());
+
+    image_type& im (sts.image ());
+    binding& imb (sts.image_binding ());
+
+    if (im.version != sts.image_version () || imb.version == 0)
+    {
+      bind (imb.bind, im);
+      sts.image_version (im.version);
+      imb.version++;
+    }
+
+    shared_ptr<sqlite::prepared_query_impl> r (
+      new (shared) sqlite::prepared_query_impl (conn));
+    r->name = n;
+    r->execute = &execute_query;
+    r->query = query_statement (q);
+    r->stmt.reset (
+      new (shared) select_statement (
+        conn,
+        r->query.clause (),
+        false,
+        true,
+        r->query.parameters_binding (),
+        imb));
+
+    return r;
+  }
+
+  odb::details::shared_ptr<result_impl>
+  access::view_traits_impl< ::bpkg::repository_fragment_count, id_sqlite >::
+  execute_query (prepared_query_impl& q)
+  {
+    using namespace sqlite;
+    using odb::details::shared;
+    using odb::details::shared_ptr;
+
+    sqlite::prepared_query_impl& pq (
+      static_cast<sqlite::prepared_query_impl&> (q));
+    shared_ptr<select_statement> st (
+      odb::details::inc_ref (
+        static_cast<select_statement*> (pq.stmt.get ())));
+
+    sqlite::transaction& tr (sqlite::transaction::current ());
+
+    // The connection used by the current transaction and the
+    // one used to prepare this statement must be the same.
+    //
+    assert (q.verify_connection (tr));
+
+    statements_type& sts (
+      st->connection ().statement_cache ().find_view<view_type> ());
+
+    image_type& im (sts.image ());
+    binding& imb (sts.image_binding ());
+
+    if (im.version != sts.image_version () || imb.version == 0)
+    {
+      bind (imb.bind, im);
+      sts.image_version (im.version);
+      imb.version++;
+    }
+
+    pq.query.init_parameters ();
+    st->execute ();
+
+    return shared_ptr<result_impl> (
+      new (shared) sqlite::view_result_impl<view_type> (
+        pq.query, st, sts, 0));
+  }
+
+  // fragment_type
+  //
+
+  bool access::composite_value_traits< ::bpkg::repository::fragment_type, id_sqlite >::
+  grow (image_type& i,
+        bool* t)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (t);
+
+    bool grew (false);
+
+    // friendly_name
+    //
+    if (t[0UL])
+    {
+      i.friendly_name_value.capacity (i.friendly_name_size);
+      grew = true;
+    }
+
+    // fragment
+    //
+    if (t[1UL])
+    {
+      i.fragment_value.capacity (i.fragment_size);
+      grew = true;
+    }
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::repository::fragment_type, id_sqlite >::
+  bind (sqlite::bind* b,
+        image_type& i,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (b);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    std::size_t n (0);
+    ODB_POTENTIALLY_UNUSED (n);
+
+    // friendly_name
+    //
+    b[n].type = sqlite::image_traits<
+      ::std::string,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.friendly_name_value.data ();
+    b[n].size = &i.friendly_name_size;
+    b[n].capacity = i.friendly_name_value.capacity ();
+    b[n].is_null = &i.friendly_name_null;
+    n++;
+
+    // fragment
+    //
+    b[n].type = sqlite::image_traits<
+      ::std::string,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.fragment_value.data ();
+    b[n].size = &i.fragment_size;
+    b[n].capacity = i.fragment_value.capacity ();
+    b[n].is_null = &i.fragment_null;
+    n++;
+  }
+
+  bool access::composite_value_traits< ::bpkg::repository::fragment_type, id_sqlite >::
+  init (image_type& i,
+        const value_type& o,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    bool grew (false);
+
+    // friendly_name
+    //
+    {
+      ::std::string const& v =
+        o.friendly_name;
+
+      bool is_null (false);
+      std::size_t cap (i.friendly_name_value.capacity ());
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_image (
+        i.friendly_name_value,
+        i.friendly_name_size,
+        is_null,
+        v);
+      i.friendly_name_null = is_null;
+      grew = grew || (cap != i.friendly_name_value.capacity ());
+    }
+
+    // fragment
+    //
+    {
+      ::bpkg::lazy_shared_ptr< ::bpkg::repository_fragment > const& v =
+        o.fragment;
+
+      typedef object_traits< ::bpkg::repository_fragment > obj_traits;
+      typedef odb::pointer_traits< ::bpkg::lazy_shared_ptr< ::bpkg::repository_fragment > > ptr_traits;
+
+      bool is_null (ptr_traits::null_ptr (v));
+      if (!is_null)
+      {
+        const obj_traits::id_type& ptr_id (
+          ptr_traits::object_id< ptr_traits::element_type  > (v));
+
+        std::size_t cap (i.fragment_value.capacity ());
+        sqlite::value_traits<
+            obj_traits::id_type,
+            sqlite::id_text >::set_image (
+          i.fragment_value,
+          i.fragment_size,
+          is_null,
+          ptr_id);
+        i.fragment_null = is_null;
+        grew = grew || (cap != i.fragment_value.capacity ());
+      }
+      else
+        i.fragment_null = true;
+    }
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::repository::fragment_type, id_sqlite >::
+  init (value_type& o,
+        const image_type&  i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // friendly_name
+    //
+    {
+      ::std::string& v =
+        o.friendly_name;
+
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_value (
+        v,
+        i.friendly_name_value,
+        i.friendly_name_size,
+        i.friendly_name_null);
+    }
+
+    // fragment
+    //
+    {
+      ::bpkg::lazy_shared_ptr< ::bpkg::repository_fragment >& v =
+        o.fragment;
+
+      typedef object_traits< ::bpkg::repository_fragment > obj_traits;
+      typedef odb::pointer_traits< ::bpkg::lazy_shared_ptr< ::bpkg::repository_fragment > > ptr_traits;
+
+      if (i.fragment_null)
+        v = ptr_traits::pointer_type ();
+      else
+      {
+        obj_traits::id_type ptr_id;
+        sqlite::value_traits<
+            obj_traits::id_type,
+            sqlite::id_text >::set_value (
+          ptr_id,
+          i.fragment_value,
+          i.fragment_size,
+          i.fragment_null);
+
+        v = ptr_traits::pointer_type (
+          *static_cast<sqlite::database*> (db), ptr_id);
+      }
+    }
+  }
+
+  // repository
+  //
+
+  struct access::object_traits_impl< ::bpkg::repository, id_sqlite >::extra_statement_cache_type
+  {
+    sqlite::container_statements_impl< fragments_traits > fragments;
+
+    extra_statement_cache_type (
+      sqlite::connection& c,
+      image_type&,
+      id_image_type&,
+      sqlite::binding& id,
+      sqlite::binding&)
+    : fragments (c, id)
+    {
+    }
+  };
+
+  // fragments
+  //
+
+  const char access::object_traits_impl< ::bpkg::repository, id_sqlite >::fragments_traits::
+  select_statement[] =
+  "SELECT "
+  "\"main\".\"repository_fragments\".\"index\", "
+  "\"main\".\"repository_fragments\".\"friendly_name\", "
+  "\"main\".\"repository_fragments\".\"fragment\" "
+  "FROM \"main\".\"repository_fragments\" "
+  "WHERE \"main\".\"repository_fragments\".\"repository\"=? ORDER BY \"main\".\"repository_fragments\".\"index\"";
+
+  const char access::object_traits_impl< ::bpkg::repository, id_sqlite >::fragments_traits::
+  insert_statement[] =
+  "INSERT INTO \"main\".\"repository_fragments\" "
+  "(\"repository\", "
+  "\"index\", "
+  "\"friendly_name\", "
+  "\"fragment\") "
+  "VALUES "
+  "(?, ?, ?, ?)";
+
+  const char access::object_traits_impl< ::bpkg::repository, id_sqlite >::fragments_traits::
+  delete_statement[] =
+  "DELETE FROM \"main\".\"repository_fragments\" "
+  "WHERE \"repository\"=?";
+
+  void access::object_traits_impl< ::bpkg::repository, id_sqlite >::fragments_traits::
+  bind (sqlite::bind* b,
+        const sqlite::bind* id,
+        std::size_t id_size,
+        data_image_type& d)
+  {
+    using namespace sqlite;
+
+    statement_kind sk (statement_select);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    size_t n (0);
+
+    // object_id
+    //
+    if (id != 0)
+      std::memcpy (&b[n], id, id_size * sizeof (id[0]));
+    n += id_size;
+
+    // index
+    //
+    b[n].type = sqlite::bind::integer;
+    b[n].buffer = &d.index_value;
+    b[n].is_null = &d.index_null;
+    n++;
+
+    // value
+    //
+    composite_value_traits< value_type, id_sqlite >::bind (
+      b + n, d.value_value, sk);
+  }
+
+  void access::object_traits_impl< ::bpkg::repository, id_sqlite >::fragments_traits::
+  grow (data_image_type& i,
+        bool* t)
+  {
+    bool grew (false);
+
+    // index
+    //
+    t[0UL] = false;
+
+    // value
+    //
+    if (composite_value_traits< value_type, id_sqlite >::grow (
+          i.value_value, t + 1UL))
+      grew = true;
+
+    if (grew)
+      i.version++;
+  }
+
+  void access::object_traits_impl< ::bpkg::repository, id_sqlite >::fragments_traits::
+  init (data_image_type& i,
+        index_type* j,
+        const value_type& v)
+  {
+    using namespace sqlite;
+
+    statement_kind sk (statement_insert);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    bool grew (false);
+
+    // index
+    //
+    if (j != 0)
+    {
+      bool is_null (false);
+      sqlite::value_traits<
+          index_type,
+          sqlite::id_integer >::set_image (
+        i.index_value,
+        is_null,
+        *j);
+      i.index_null = is_null;
+    }
+
+    // value
+    //
+    {
+      if (composite_value_traits< value_type, id_sqlite >::init (
+            i.value_value,
+            v,
+            sk))
+        grew = true;
+    }
+
+    if (grew)
+      i.version++;
+  }
+
+  void access::object_traits_impl< ::bpkg::repository, id_sqlite >::fragments_traits::
+  init (index_type& j,
+        value_type& v,
+        const data_image_type& i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // index
+    //
+    {
+      sqlite::value_traits<
+          index_type,
+          sqlite::id_integer >::set_value (
+        j,
+        i.index_value,
+        i.index_null);
+    }
+
+    // value
+    //
+    {
+      composite_value_traits< value_type, id_sqlite >::init (
+        v,
+        i.value_value,
+        db);
+    }
+  }
+
+  void access::object_traits_impl< ::bpkg::repository, id_sqlite >::fragments_traits::
+  insert (index_type i, const value_type& v, void* d)
+  {
+    using namespace sqlite;
+
+    statements_type& sts (*static_cast< statements_type* > (d));
+    data_image_type& di (sts.data_image ());
+
+    init (di, &i, v);
+
+    if (sts.data_binding_test_version ())
+    {
+      const binding& id (sts.id_binding ());
+      bind (sts.data_bind (), id.bind, id.count, di);
+      sts.data_binding_update_version ();
+    }
+
+    if (!sts.insert_statement ().execute ())
+      throw object_already_persistent ();
+  }
+
+  bool access::object_traits_impl< ::bpkg::repository, id_sqlite >::fragments_traits::
+  select (index_type& i, value_type& v, void* d)
+  {
+    using namespace sqlite;
+    using sqlite::select_statement;
+
+    statements_type& sts (*static_cast< statements_type* > (d));
+    data_image_type& di (sts.data_image ());
+
+    init (i, v, di, &sts.connection ().database ());
+
+    select_statement& st (sts.select_statement ());
+    select_statement::result r (st.fetch ());
+
+    if (r == select_statement::truncated)
+    {
+      grow (di, sts.select_image_truncated ());
+
+      if (sts.data_binding_test_version ())
+      {
+        bind (sts.data_bind (), 0, sts.id_binding ().count, di);
+        sts.data_binding_update_version ();
+        st.refetch ();
+      }
+    }
+
+    return r != select_statement::no_data;
+  }
+
+  void access::object_traits_impl< ::bpkg::repository, id_sqlite >::fragments_traits::
+  delete_ (void* d)
+  {
+    using namespace sqlite;
+
+    statements_type& sts (*static_cast< statements_type* > (d));
+    sts.delete_statement ().execute ();
+  }
+
+  void access::object_traits_impl< ::bpkg::repository, id_sqlite >::fragments_traits::
+  persist (const container_type& c,
+           statements_type& sts)
+  {
+    using namespace sqlite;
+
+    functions_type& fs (sts.functions ());
+    fs.ordered_ = true;
+    container_traits_type::persist (c, fs);
+  }
+
+  void access::object_traits_impl< ::bpkg::repository, id_sqlite >::fragments_traits::
+  load (container_type& c,
+        statements_type& sts)
+  {
+    using namespace sqlite;
+    using sqlite::select_statement;
+
+    const binding& id (sts.id_binding ());
+
+    if (sts.data_binding_test_version ())
+    {
+      bind (sts.data_bind (), id.bind, id.count, sts.data_image ());
+      sts.data_binding_update_version ();
+    }
+
+    select_statement& st (sts.select_statement ());
+    st.execute ();
+    auto_result ar (st);
+    select_statement::result r (st.fetch ());
+
+    if (r == select_statement::truncated)
+    {
+      data_image_type& di (sts.data_image ());
+      grow (di, sts.select_image_truncated ());
+
+      if (sts.data_binding_test_version ())
+      {
+        bind (sts.data_bind (), 0, id.count, di);
+        sts.data_binding_update_version ();
+        st.refetch ();
+      }
+    }
+
+    bool more (r != select_statement::no_data);
+
+    functions_type& fs (sts.functions ());
+    fs.ordered_ = true;
+    container_traits_type::load (c, more, fs);
+  }
+
+  void access::object_traits_impl< ::bpkg::repository, id_sqlite >::fragments_traits::
+  update (const container_type& c,
+          statements_type& sts)
+  {
+    using namespace sqlite;
+
+    functions_type& fs (sts.functions ());
+    fs.ordered_ = true;
+    container_traits_type::update (c, fs);
+  }
+
+  void access::object_traits_impl< ::bpkg::repository, id_sqlite >::fragments_traits::
+  erase (statements_type& sts)
+  {
+    using namespace sqlite;
+
+    functions_type& fs (sts.functions ());
+    fs.ordered_ = true;
+    container_traits_type::erase (fs);
+  }
+
+  access::object_traits_impl< ::bpkg::repository, id_sqlite >::id_type
+  access::object_traits_impl< ::bpkg::repository, id_sqlite >::
+  id (const image_type& i)
+  {
+    sqlite::database* db (0);
+    ODB_POTENTIALLY_UNUSED (db);
+
+    id_type id;
+    {
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_value (
+        id,
+        i.name_value,
+        i.name_size,
+        i.name_null);
+    }
+
+    return id;
+  }
+
+  bool access::object_traits_impl< ::bpkg::repository, id_sqlite >::
+  grow (image_type& i,
+        bool* t)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (t);
+
+    bool grew (false);
+
+    // name
+    //
+    if (t[0UL])
+    {
+      i.name_value.capacity (i.name_size);
+      grew = true;
+    }
+
+    // location
+    //
+    if (composite_value_traits< ::bpkg::_repository_location, id_sqlite >::grow (
+          i.location_value, t + 1UL))
+      grew = true;
+
+    // certificate
+    //
+    if (t[3UL])
+    {
+      i.certificate_value.capacity (i.certificate_size);
+      grew = true;
+    }
+
+    // local
+    //
+    t[4UL] = false;
+
+    return grew;
+  }
+
+  void access::object_traits_impl< ::bpkg::repository, id_sqlite >::
+  bind (sqlite::bind* b,
+        image_type& i,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    std::size_t n (0);
+
+    // name
+    //
+    if (sk != statement_update)
+    {
+      b[n].type = sqlite::image_traits<
+        ::std::string,
+        sqlite::id_text>::bind_value;
+      b[n].buffer = i.name_value.data ();
+      b[n].size = &i.name_size;
+      b[n].capacity = i.name_value.capacity ();
+      b[n].is_null = &i.name_null;
+      n++;
+    }
+
+    // location
+    //
+    composite_value_traits< ::bpkg::_repository_location, id_sqlite >::bind (
+      b + n, i.location_value, sk);
+    n += 2UL;
+
+    // certificate
+    //
+    b[n].type = sqlite::image_traits<
+      ::butl::optional< ::std::basic_string< char > >,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.certificate_value.data ();
+    b[n].size = &i.certificate_size;
+    b[n].capacity = i.certificate_value.capacity ();
+    b[n].is_null = &i.certificate_null;
+    n++;
+
+    // local
+    //
+    b[n].type = sqlite::bind::integer;
+    b[n].buffer = &i.local_value;
+    b[n].is_null = &i.local_null;
+    n++;
+  }
+
+  void access::object_traits_impl< ::bpkg::repository, id_sqlite >::
+  bind (sqlite::bind* b, id_image_type& i)
+  {
+    std::size_t n (0);
+    b[n].type = sqlite::image_traits<
+      ::std::string,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.id_value.data ();
+    b[n].size = &i.id_size;
+    b[n].capacity = i.id_value.capacity ();
+    b[n].is_null = &i.id_null;
+  }
+
+  bool access::object_traits_impl< ::bpkg::repository, id_sqlite >::
+  init (image_type& i,
+        const object_type& o,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    bool grew (false);
+
+    // name
+    //
+    if (sk == statement_insert)
+    {
+      ::std::string const& v =
+        o.name;
+
+      bool is_null (false);
+      std::size_t cap (i.name_value.capacity ());
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_image (
+        i.name_value,
+        i.name_size,
+        is_null,
+        v);
+      i.name_null = is_null;
+      grew = grew || (cap != i.name_value.capacity ());
+    }
+
+    // location
+    //
+    {
+      ::bpkg::repository_location const& v =
+        o.location;
+
+      // From package.hxx:363:14
+      ::bpkg::_repository_location const& vt =
+        bpkg::_repository_location 
+      {
+         (v).url (), (v).empty () ? bpkg::repository_type::pkg : (v).type () 
+      };
+
+
+      if (composite_value_traits< ::bpkg::_repository_location, id_sqlite >::init (
+            i.location_value,
+            vt,
+            sk))
+        grew = true;
+    }
+
+    // certificate
+    //
+    {
+      ::butl::optional< ::std::basic_string< char > > const& v =
+        o.certificate;
+
+      bool is_null (true);
+      std::size_t cap (i.certificate_value.capacity ());
+      sqlite::value_traits<
+          ::butl::optional< ::std::basic_string< char > >,
+          sqlite::id_text >::set_image (
+        i.certificate_value,
+        i.certificate_size,
+        is_null,
+        v);
+      i.certificate_null = is_null;
+      grew = grew || (cap != i.certificate_value.capacity ());
+    }
+
+    // local
+    //
+    {
+      ::butl::optional< bool > const& v =
+        o.local;
+
+      bool is_null (true);
+      sqlite::value_traits<
+          ::butl::optional< bool >,
+          sqlite::id_integer >::set_image (
+        i.local_value,
+        is_null,
+        v);
+      i.local_null = is_null;
+    }
+
+    return grew;
+  }
+
+  void access::object_traits_impl< ::bpkg::repository, id_sqlite >::
+  init (object_type& o,
+        const image_type& i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // name
+    //
+    {
+      ::std::string& v =
+        o.name;
+
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_value (
+        v,
+        i.name_value,
+        i.name_size,
+        i.name_null);
+    }
+
+    // location
+    //
+    {
+      // From package.hxx:496:7
+      ::bpkg::repository_location v;
+
+      ::bpkg::_repository_location vt;
+
+      composite_value_traits< ::bpkg::_repository_location, id_sqlite >::init (
+        vt,
+        i.location_value,
+        db);
+
+      // From package.hxx:363:14
+      v = bpkg::repository_location (std::move ((vt).url), (vt).type);
+      // From package.hxx:496:7
+      o.location = std::move (v);
+      assert (o.name == o.location.canonical_name ());
+    }
+
+    // certificate
+    //
+    {
+      ::butl::optional< ::std::basic_string< char > >& v =
+        o.certificate;
+
+      sqlite::value_traits<
+          ::butl::optional< ::std::basic_string< char > >,
+          sqlite::id_text >::set_value (
+        v,
+        i.certificate_value,
+        i.certificate_size,
+        i.certificate_null);
+    }
+
+    // local
+    //
+    {
+      ::butl::optional< bool >& v =
+        o.local;
+
+      sqlite::value_traits<
+          ::butl::optional< bool >,
+          sqlite::id_integer >::set_value (
+        v,
+        i.local_value,
+        i.local_null);
+    }
+  }
+
+  void access::object_traits_impl< ::bpkg::repository, id_sqlite >::
+  init (id_image_type& i, const id_type& id)
+  {
+    bool grew (false);
+    {
+      bool is_null (false);
+      std::size_t cap (i.id_value.capacity ());
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_image (
+        i.id_value,
+        i.id_size,
+        is_null,
+        id);
+      i.id_null = is_null;
+      grew = grew || (cap != i.id_value.capacity ());
+    }
+
+    if (grew)
+      i.version++;
+  }
+
+  const char access::object_traits_impl< ::bpkg::repository, id_sqlite >::persist_statement[] =
+  "INSERT INTO \"main\".\"repository\" "
+  "(\"name\", "
+  "\"url\", "
+  "\"type\", "
+  "\"certificate\", "
+  "\"local\") "
+  "VALUES "
+  "(?, ?, ?, ?, ?)";
+
+  const char access::object_traits_impl< ::bpkg::repository, id_sqlite >::find_statement[] =
+  "SELECT "
+  "\"main\".\"repository\".\"name\", "
+  "\"main\".\"repository\".\"url\", "
+  "\"main\".\"repository\".\"type\", "
+  "\"main\".\"repository\".\"certificate\", "
+  "\"main\".\"repository\".\"local\" "
+  "FROM \"main\".\"repository\" "
+  "WHERE \"main\".\"repository\".\"name\"=?";
+
+  const char access::object_traits_impl< ::bpkg::repository, id_sqlite >::update_statement[] =
+  "UPDATE \"main\".\"repository\" "
+  "SET "
+  "\"url\"=?, "
+  "\"type\"=?, "
+  "\"certificate\"=?, "
+  "\"local\"=? "
+  "WHERE \"name\"=?";
+
+  const char access::object_traits_impl< ::bpkg::repository, id_sqlite >::erase_statement[] =
+  "DELETE FROM \"main\".\"repository\" "
+  "WHERE \"name\"=?";
+
+  const char access::object_traits_impl< ::bpkg::repository, id_sqlite >::query_statement[] =
+  "SELECT "
+  "\"main\".\"repository\".\"name\", "
+  "\"main\".\"repository\".\"url\", "
+  "\"main\".\"repository\".\"type\", "
+  "\"main\".\"repository\".\"certificate\", "
+  "\"main\".\"repository\".\"local\" "
+  "FROM \"main\".\"repository\"";
+
+  const char access::object_traits_impl< ::bpkg::repository, id_sqlite >::erase_query_statement[] =
+  "DELETE FROM \"main\".\"repository\"";
+
+  const char access::object_traits_impl< ::bpkg::repository, id_sqlite >::table_name[] =
+  "\"main\".\"repository\"";
+
+  void access::object_traits_impl< ::bpkg::repository, id_sqlite >::
+  persist (database& db, const object_type& obj)
+  {
+    using namespace sqlite;
+
+    sqlite::connection& conn (
+      sqlite::transaction::current ().connection (db));
+    statements_type& sts (
+      conn.statement_cache ().find_object<object_type> ());
+
+    callback (db,
+              obj,
+              callback_event::pre_persist);
+
+    image_type& im (sts.image ());
+    binding& imb (sts.insert_image_binding ());
+
+    if (init (im, obj, statement_insert))
+      im.version++;
+
+    if (im.version != sts.insert_image_version () ||
+        imb.version == 0)
+    {
+      bind (imb.bind, im, statement_insert);
+      sts.insert_image_version (im.version);
+      imb.version++;
+    }
+
+    insert_statement& st (sts.persist_statement ());
+    if (!st.execute ())
+      throw object_already_persistent ();
+
+    id_image_type& i (sts.id_image ());
+    init (i, id (obj));
+
+    binding& idb (sts.id_image_binding ());
+    if (i.version != sts.id_image_version () || idb.version == 0)
+    {
+      bind (idb.bind, i);
+      sts.id_image_version (i.version);
+      idb.version++;
+    }
+
+    extra_statement_cache_type& esc (sts.extra_statement_cache ());
+
+    // fragments
+    //
+    {
+      ::bpkg::repository::fragments_type const& v =
+        obj.fragments;
+
+      fragments_traits::persist (
+        v,
+        esc.fragments);
+    }
+
+    callback (db,
+              obj,
+              callback_event::post_persist);
+  }
+
+  void access::object_traits_impl< ::bpkg::repository, id_sqlite >::
+  update (database& db, const object_type& obj)
+  {
+    ODB_POTENTIALLY_UNUSED (db);
+
+    using namespace sqlite;
+    using sqlite::update_statement;
+
+    callback (db, obj, callback_event::pre_update);
+
+    sqlite::transaction& tr (sqlite::transaction::current ());
+    sqlite::connection& conn (tr.connection (db));
+    statements_type& sts (
+      conn.statement_cache ().find_object<object_type> ());
+
+    id_image_type& idi (sts.id_image ());
+    init (idi, id (obj));
+
+    image_type& im (sts.image ());
+    if (init (im, obj, statement_update))
+      im.version++;
+
+    bool u (false);
+    binding& imb (sts.update_image_binding ());
+    if (im.version != sts.update_image_version () ||
+        imb.version == 0)
+    {
+      bind (imb.bind, im, statement_update);
+      sts.update_image_version (im.version);
+      imb.version++;
+      u = true;
+    }
+
+    binding& idb (sts.id_image_binding ());
+    if (idi.version != sts.update_id_image_version () ||
+        idb.version == 0)
+    {
+      if (idi.version != sts.id_image_version () ||
+          idb.version == 0)
+      {
+        bind (idb.bind, idi);
+        sts.id_image_version (idi.version);
+        idb.version++;
+      }
+
+      sts.update_id_image_version (idi.version);
+
+      if (!u)
+        imb.version++;
+    }
+
+    update_statement& st (sts.update_statement ());
+    if (st.execute () == 0)
+      throw object_not_persistent ();
+
+    extra_statement_cache_type& esc (sts.extra_statement_cache ());
+
+    // fragments
+    //
+    {
+      ::bpkg::repository::fragments_type const& v =
+        obj.fragments;
+
+      fragments_traits::update (
+        v,
+        esc.fragments);
+    }
+
+    callback (db, obj, callback_event::post_update);
+    pointer_cache_traits::update (db, obj);
+  }
+
+  void access::object_traits_impl< ::bpkg::repository, id_sqlite >::
+  erase (database& db, const id_type& id)
+  {
+    using namespace sqlite;
+
+    sqlite::connection& conn (
+      sqlite::transaction::current ().connection (db));
+    statements_type& sts (
+      conn.statement_cache ().find_object<object_type> ());
+
+    id_image_type& i (sts.id_image ());
+    init (i, id);
+
+    binding& idb (sts.id_image_binding ());
+    if (i.version != sts.id_image_version () || idb.version == 0)
+    {
+      bind (idb.bind, i);
+      sts.id_image_version (i.version);
+      idb.version++;
+    }
+
+    extra_statement_cache_type& esc (sts.extra_statement_cache ());
+
+    // fragments
+    //
+    {
+      fragments_traits::erase (
+        esc.fragments);
+    }
+
+    if (sts.erase_statement ().execute () != 1)
+      throw object_not_persistent ();
+
+    pointer_cache_traits::erase (db, id);
+  }
+
+  access::object_traits_impl< ::bpkg::repository, id_sqlite >::pointer_type
+  access::object_traits_impl< ::bpkg::repository, id_sqlite >::
+  find (database& db, const id_type& id)
+  {
+    using namespace sqlite;
+
+    {
+      pointer_type p (pointer_cache_traits::find (db, id));
+
+      if (!pointer_traits::null_ptr (p))
+        return p;
+    }
+
+    sqlite::connection& conn (
+      sqlite::transaction::current ().connection (db));
+    statements_type& sts (
+      conn.statement_cache ().find_object<object_type> ());
+
+    statements_type::auto_lock l (sts);
+
+    if (l.locked ())
+    {
+      if (!find_ (sts, &id))
+        return pointer_type ();
+    }
+
+    pointer_type p (
+      access::object_factory<object_type, pointer_type>::create ());
+    pointer_traits::guard pg (p);
+
+    pointer_cache_traits::insert_guard ig (
+      pointer_cache_traits::insert (db, id, p));
+
+    object_type& obj (pointer_traits::get_ref (p));
+
+    if (l.locked ())
+    {
+      select_statement& st (sts.find_statement ());
+      ODB_POTENTIALLY_UNUSED (st);
+
+      callback (db, obj, callback_event::pre_load);
+      init (obj, sts.image (), &db);
+      load_ (sts, obj, false);
+      sts.load_delayed (0);
+      l.unlock ();
+      callback (db, obj, callback_event::post_load);
+      pointer_cache_traits::load (ig.position ());
+    }
+    else
+      sts.delay_load (id, obj, ig.position ());
+
+    ig.release ();
+    pg.release ();
+    return p;
+  }
+
+  bool access::object_traits_impl< ::bpkg::repository, id_sqlite >::
+  find (database& db, const id_type& id, object_type& obj)
+  {
+    using namespace sqlite;
+
+    sqlite::connection& conn (
+      sqlite::transaction::current ().connection (db));
+    statements_type& sts (
+      conn.statement_cache ().find_object<object_type> ());
+
+    statements_type::auto_lock l (sts);
+    assert (l.locked ()) /* Must be a top-level call. */;
+
+    if (!find_ (sts, &id))
+      return false;
+
+    select_statement& st (sts.find_statement ());
+    ODB_POTENTIALLY_UNUSED (st);
+
+    reference_cache_traits::position_type pos (
+      reference_cache_traits::insert (db, id, obj));
+    reference_cache_traits::insert_guard ig (pos);
+
+    callback (db, obj, callback_event::pre_load);
+    init (obj, sts.image (), &db);
+    load_ (sts, obj, false);
+    sts.load_delayed (0);
+    l.unlock ();
+    callback (db, obj, callback_event::post_load);
+    reference_cache_traits::load (pos);
+    ig.release ();
+    return true;
+  }
+
+  bool access::object_traits_impl< ::bpkg::repository, id_sqlite >::
+  reload (database& db, object_type& obj)
+  {
+    using namespace sqlite;
+
+    sqlite::connection& conn (
+      sqlite::transaction::current ().connection (db));
+    statements_type& sts (
+      conn.statement_cache ().find_object<object_type> ());
+
+    statements_type::auto_lock l (sts);
+    assert (l.locked ()) /* Must be a top-level call. */;
+
+    const id_type& id (object_traits_impl::id (obj));
+    if (!find_ (sts, &id))
+      return false;
+
+    select_statement& st (sts.find_statement ());
+    ODB_POTENTIALLY_UNUSED (st);
+
+    callback (db, obj, callback_event::pre_load);
+    init (obj, sts.image (), &db);
+    load_ (sts, obj, true);
+    sts.load_delayed (0);
+    l.unlock ();
+    callback (db, obj, callback_event::post_load);
+    return true;
+  }
+
+  bool access::object_traits_impl< ::bpkg::repository, id_sqlite >::
+  find_ (statements_type& sts,
+         const id_type* id)
+  {
+    using namespace sqlite;
+
+    id_image_type& i (sts.id_image ());
+    init (i, *id);
+
+    binding& idb (sts.id_image_binding ());
+    if (i.version != sts.id_image_version () || idb.version == 0)
+    {
+      bind (idb.bind, i);
+      sts.id_image_version (i.version);
+      idb.version++;
+    }
+
+    image_type& im (sts.image ());
+    binding& imb (sts.select_image_binding ());
+
+    if (im.version != sts.select_image_version () ||
+        imb.version == 0)
+    {
+      bind (imb.bind, im, statement_select);
+      sts.select_image_version (im.version);
+      imb.version++;
+    }
+
+    select_statement& st (sts.find_statement ());
+
+    st.execute ();
+    auto_result ar (st);
+    select_statement::result r (st.fetch ());
+
+    if (r == select_statement::truncated)
+    {
+      if (grow (im, sts.select_image_truncated ()))
+        im.version++;
+
+      if (im.version != sts.select_image_version ())
+      {
+        bind (imb.bind, im, statement_select);
+        sts.select_image_version (im.version);
+        imb.version++;
+        st.refetch ();
+      }
+    }
+
+    return r != select_statement::no_data;
+  }
+
+  void access::object_traits_impl< ::bpkg::repository, id_sqlite >::
+  load_ (statements_type& sts,
+         object_type& obj,
+         bool reload)
+  {
+    ODB_POTENTIALLY_UNUSED (reload);
+
+    extra_statement_cache_type& esc (sts.extra_statement_cache ());
+
+    // fragments
+    //
+    {
+      ::bpkg::repository::fragments_type& v =
+        obj.fragments;
+
+      fragments_traits::load (
+        v,
+        esc.fragments);
+    }
+  }
+
+  result< access::object_traits_impl< ::bpkg::repository, id_sqlite >::object_type >
+  access::object_traits_impl< ::bpkg::repository, id_sqlite >::
+  query (database& db, const query_base_type& q)
+  {
+    using namespace sqlite;
+    using odb::details::shared;
+    using odb::details::shared_ptr;
+
+    sqlite::connection& conn (
+      sqlite::transaction::current ().connection (db));
+
+    statements_type& sts (
+      conn.statement_cache ().find_object<object_type> ());
+
+    image_type& im (sts.image ());
+    binding& imb (sts.select_image_binding ());
+
+    if (im.version != sts.select_image_version () ||
+        imb.version == 0)
+    {
+      bind (imb.bind, im, statement_select);
+      sts.select_image_version (im.version);
+      imb.version++;
+    }
+
+    std::string text (query_statement);
+    if (!q.empty ())
+    {
+      text += " ";
+      text += q.clause ();
+    }
+
+    q.init_parameters ();
+    shared_ptr<select_statement> st (
+      new (shared) select_statement (
+        conn,
+        text,
+        false,
+        true,
+        q.parameters_binding (),
+        imb));
+
+    st->execute ();
+
+    shared_ptr< odb::object_result_impl<object_type> > r (
+      new (shared) sqlite::object_result_impl<object_type> (
+        q, st, sts, 0));
+
+    return result<object_type> (r);
+  }
+
+  unsigned long long access::object_traits_impl< ::bpkg::repository, id_sqlite >::
+  erase_query (database& db, const query_base_type& q)
+  {
+    using namespace sqlite;
+
+    sqlite::connection& conn (
+      sqlite::transaction::current ().connection (db));
+
+    std::string text (erase_query_statement);
+    if (!q.empty ())
+    {
+      text += ' ';
+      text += q.clause ();
+    }
+
+    q.init_parameters ();
+    delete_statement st (
+      conn,
+      text,
+      q.parameters_binding ());
+
+    return st.execute ();
+  }
+
+  odb::details::shared_ptr<prepared_query_impl>
+  access::object_traits_impl< ::bpkg::repository, id_sqlite >::
+  prepare_query (connection& c, const char* n, const query_base_type& q)
+  {
+    using namespace sqlite;
+    using odb::details::shared;
+    using odb::details::shared_ptr;
+
+    sqlite::connection& conn (
+      static_cast<sqlite::connection&> (c));
+
+    statements_type& sts (
+      conn.statement_cache ().find_object<object_type> ());
+
+    image_type& im (sts.image ());
+    binding& imb (sts.select_image_binding ());
+
+    if (im.version != sts.select_image_version () ||
+        imb.version == 0)
+    {
+      bind (imb.bind, im, statement_select);
+      sts.select_image_version (im.version);
+      imb.version++;
+    }
+
+    std::string text (query_statement);
+    if (!q.empty ())
+    {
+      text += " ";
+      text += q.clause ();
+    }
+
+    shared_ptr<sqlite::prepared_query_impl> r (
+      new (shared) sqlite::prepared_query_impl (conn));
+    r->name = n;
+    r->execute = &execute_query;
+    r->query = q;
+    r->stmt.reset (
+      new (shared) select_statement (
+        conn,
+        text,
+        false,
+        true,
+        r->query.parameters_binding (),
+        imb));
+
+    return r;
+  }
+
+  odb::details::shared_ptr<result_impl>
+  access::object_traits_impl< ::bpkg::repository, id_sqlite >::
+  execute_query (prepared_query_impl& q)
+  {
+    using namespace sqlite;
+    using odb::details::shared;
+    using odb::details::shared_ptr;
+
+    sqlite::prepared_query_impl& pq (
+      static_cast<sqlite::prepared_query_impl&> (q));
+    shared_ptr<select_statement> st (
+      odb::details::inc_ref (
+        static_cast<select_statement*> (pq.stmt.get ())));
+
+    sqlite::transaction& tr (sqlite::transaction::current ());
+
+    // The connection used by the current transaction and the
+    // one used to prepare this statement must be the same.
+    //
+    assert (q.verify_connection (tr));
+
+    statements_type& sts (
+      st->connection ().statement_cache ().find_object<object_type> ());
+
+    image_type& im (sts.image ());
+    binding& imb (sts.select_image_binding ());
+
+    if (im.version != sts.select_image_version () ||
+        imb.version == 0)
+    {
+      bind (imb.bind, im, statement_select);
+      sts.select_image_version (im.version);
+      imb.version++;
+    }
+
+    pq.query.init_parameters ();
+    st->execute ();
+
+    return shared_ptr<result_impl> (
+      new (shared) sqlite::object_result_impl<object_type> (
+        pq.query, st, sts, 0));
+  }
+
+  // repository_count
+  //
+
+  bool access::view_traits_impl< ::bpkg::repository_count, id_sqlite >::
+  grow (image_type& i,
+        bool* t)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (t);
+
+    bool grew (false);
+
+    // result
+    //
+    t[0UL] = false;
+
+    return grew;
+  }
+
+  void access::view_traits_impl< ::bpkg::repository_count, id_sqlite >::
+  bind (sqlite::bind* b,
+        image_type& i)
+  {
+    using namespace sqlite;
+
+    sqlite::statement_kind sk (statement_select);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    std::size_t n (0);
+
+    // result
+    //
+    b[n].type = sqlite::bind::integer;
+    b[n].buffer = &i.result_value;
+    b[n].is_null = &i.result_null;
+    n++;
+  }
+
+  void access::view_traits_impl< ::bpkg::repository_count, id_sqlite >::
+  init (view_type& o,
+        const image_type& i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // result
+    //
+    {
+      ::std::size_t& v =
+        o.result;
+
+      sqlite::value_traits<
+          ::std::size_t,
+          sqlite::id_integer >::set_value (
+        v,
+        i.result_value,
+        i.result_null);
+    }
+  }
+
+  access::view_traits_impl< ::bpkg::repository_count, id_sqlite >::query_base_type
+  access::view_traits_impl< ::bpkg::repository_count, id_sqlite >::
+  query_statement (const query_base_type& q)
+  {
+    query_base_type r (
+      "SELECT "
+      "count(*) ");
+
+    r += "FROM \"main\".\"repository\"";
+
+    query_base_type c (
+      // From package.hxx:507:38
+      query_columns::name != "" && (q.empty () ? query_base_type::true_expr : q));
+
+    c.optimize ();
+
+    if (!c.empty ())
+    {
+      r += " ";
+      r += c.clause_prefix ();
+      r += c;
+    }
+
+    return r;
+  }
+
+  result< access::view_traits_impl< ::bpkg::repository_count, id_sqlite >::view_type >
+  access::view_traits_impl< ::bpkg::repository_count, id_sqlite >::
+  query (database& db, const query_base_type& q)
+  {
+    using namespace sqlite;
+    using odb::details::shared;
+    using odb::details::shared_ptr;
+
+    sqlite::connection& conn (
+      sqlite::transaction::current ().connection (db));
+    statements_type& sts (
+      conn.statement_cache ().find_view<view_type> ());
+
+    image_type& im (sts.image ());
+    binding& imb (sts.image_binding ());
+
+    if (im.version != sts.image_version () || imb.version == 0)
+    {
+      bind (imb.bind, im);
+      sts.image_version (im.version);
+      imb.version++;
+    }
+
+    const query_base_type& qs (query_statement (q));
+    qs.init_parameters ();
+    shared_ptr<select_statement> st (
+      new (shared) select_statement (
+        conn,
+        qs.clause (),
+        false,
+        true,
+        qs.parameters_binding (),
+        imb));
+
+    st->execute ();
+
+    shared_ptr< odb::view_result_impl<view_type> > r (
+      new (shared) sqlite::view_result_impl<view_type> (
+        qs, st, sts, 0));
+
+    return result<view_type> (r);
+  }
+
+  odb::details::shared_ptr<prepared_query_impl>
+  access::view_traits_impl< ::bpkg::repository_count, id_sqlite >::
+  prepare_query (connection& c, const char* n, const query_base_type& q)
+  {
+    using namespace sqlite;
+    using odb::details::shared;
+    using odb::details::shared_ptr;
+
+    sqlite::connection& conn (
+      static_cast<sqlite::connection&> (c));
+    statements_type& sts (
+      conn.statement_cache ().find_view<view_type> ());
+
+    image_type& im (sts.image ());
+    binding& imb (sts.image_binding ());
+
+    if (im.version != sts.image_version () || imb.version == 0)
+    {
+      bind (imb.bind, im);
+      sts.image_version (im.version);
+      imb.version++;
+    }
+
+    shared_ptr<sqlite::prepared_query_impl> r (
+      new (shared) sqlite::prepared_query_impl (conn));
+    r->name = n;
+    r->execute = &execute_query;
+    r->query = query_statement (q);
+    r->stmt.reset (
+      new (shared) select_statement (
+        conn,
+        r->query.clause (),
+        false,
+        true,
+        r->query.parameters_binding (),
+        imb));
+
+    return r;
+  }
+
+  odb::details::shared_ptr<result_impl>
+  access::view_traits_impl< ::bpkg::repository_count, id_sqlite >::
+  execute_query (prepared_query_impl& q)
+  {
+    using namespace sqlite;
+    using odb::details::shared;
+    using odb::details::shared_ptr;
+
+    sqlite::prepared_query_impl& pq (
+      static_cast<sqlite::prepared_query_impl&> (q));
+    shared_ptr<select_statement> st (
+      odb::details::inc_ref (
+        static_cast<select_statement*> (pq.stmt.get ())));
+
+    sqlite::transaction& tr (sqlite::transaction::current ());
+
+    // The connection used by the current transaction and the
+    // one used to prepare this statement must be the same.
+    //
+    assert (q.verify_connection (tr));
+
+    statements_type& sts (
+      st->connection ().statement_cache ().find_view<view_type> ());
+
+    image_type& im (sts.image ());
+    binding& imb (sts.image_binding ());
+
+    if (im.version != sts.image_version () || imb.version == 0)
+    {
+      bind (imb.bind, im);
+      sts.image_version (im.version);
+      imb.version++;
+    }
+
+    pq.query.init_parameters ();
+    st->execute ();
+
+    return shared_ptr<result_impl> (
+      new (shared) sqlite::view_result_impl<view_type> (
+        pq.query, st, sts, 0));
+  }
+
+  // package_location
+  //
+
+  bool access::composite_value_traits< ::bpkg::package_location, id_sqlite >::
+  grow (image_type& i,
+        bool* t)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (t);
+
+    bool grew (false);
+
+    // repository_fragment
+    //
+    if (t[0UL])
+    {
+      i.repository_fragment_value.capacity (i.repository_fragment_size);
+      grew = true;
+    }
+
+    // location
+    //
+    if (t[1UL])
+    {
+      i.location_value.capacity (i.location_size);
+      grew = true;
+    }
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::package_location, id_sqlite >::
+  bind (sqlite::bind* b,
+        image_type& i,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (b);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    std::size_t n (0);
+    ODB_POTENTIALLY_UNUSED (n);
+
+    // repository_fragment
+    //
+    b[n].type = sqlite::image_traits<
+      ::std::string,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.repository_fragment_value.data ();
+    b[n].size = &i.repository_fragment_size;
+    b[n].capacity = i.repository_fragment_value.capacity ();
+    b[n].is_null = &i.repository_fragment_null;
+    n++;
+
+    // location
+    //
+    b[n].type = sqlite::image_traits<
+      ::std::string,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.location_value.data ();
+    b[n].size = &i.location_size;
+    b[n].capacity = i.location_value.capacity ();
+    b[n].is_null = &i.location_null;
+    n++;
+  }
+
+  bool access::composite_value_traits< ::bpkg::package_location, id_sqlite >::
+  init (image_type& i,
+        const value_type& o,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    bool grew (false);
+
+    // repository_fragment
+    //
+    {
+      ::bpkg::lazy_shared_ptr< ::bpkg::repository_fragment > const& v =
+        o.repository_fragment;
+
+      typedef object_traits< ::bpkg::repository_fragment > obj_traits;
+      typedef odb::pointer_traits< ::bpkg::lazy_shared_ptr< ::bpkg::repository_fragment > > ptr_traits;
+
+      bool is_null (ptr_traits::null_ptr (v));
+      if (!is_null)
+      {
+        const obj_traits::id_type& ptr_id (
+          ptr_traits::object_id< ptr_traits::element_type  > (v));
+
+        std::size_t cap (i.repository_fragment_value.capacity ());
+        sqlite::value_traits<
+            obj_traits::id_type,
+            sqlite::id_text >::set_image (
+          i.repository_fragment_value,
+          i.repository_fragment_size,
+          is_null,
+          ptr_id);
+        i.repository_fragment_null = is_null;
+        grew = grew || (cap != i.repository_fragment_value.capacity ());
+      }
+      else
+        i.repository_fragment_null = true;
+    }
+
+    // location
+    //
+    {
+      ::butl::path const& v =
+        o.location;
+
+      // From package.hxx:45:14
+      ::std::string const& vt =
+        (v).representation ();
+
+      bool is_null (false);
+      std::size_t cap (i.location_value.capacity ());
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_image (
+        i.location_value,
+        i.location_size,
+        is_null,
+        vt);
+      i.location_null = is_null;
+      grew = grew || (cap != i.location_value.capacity ());
+    }
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::package_location, id_sqlite >::
+  init (value_type& o,
+        const image_type&  i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // repository_fragment
+    //
+    {
+      ::bpkg::lazy_shared_ptr< ::bpkg::repository_fragment >& v =
+        o.repository_fragment;
+
+      typedef object_traits< ::bpkg::repository_fragment > obj_traits;
+      typedef odb::pointer_traits< ::bpkg::lazy_shared_ptr< ::bpkg::repository_fragment > > ptr_traits;
+
+      if (i.repository_fragment_null)
+        v = ptr_traits::pointer_type ();
+      else
+      {
+        obj_traits::id_type ptr_id;
+        sqlite::value_traits<
+            obj_traits::id_type,
+            sqlite::id_text >::set_value (
+          ptr_id,
+          i.repository_fragment_value,
+          i.repository_fragment_size,
+          i.repository_fragment_null);
+
+        v = ptr_traits::pointer_type (
+          *static_cast<sqlite::database*> (db), ptr_id);
+      }
+    }
+
+    // location
+    //
+    {
+      ::butl::path& v =
+        o.location;
+
+      ::std::string vt;
+
+      sqlite::value_traits<
+          ::std::string,
+          sqlite::id_text >::set_value (
+        vt,
+        i.location_value,
+        i.location_size,
+        i.location_null);
+
+      // From package.hxx:45:14
+      v = bpkg::path (vt);
+    }
+  }
+
+  // dependency_alternatives_ex
+  //
+
+  bool access::composite_value_traits< ::bpkg::dependency_alternatives_ex, id_sqlite >::
+  grow (image_type& i,
+        bool* t)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (t);
+
+    bool grew (false);
+
+    // dependency_alternatives base
+    //
+    if (composite_value_traits< ::bpkg::dependency_alternatives, id_sqlite >::grow (
+          i, t + 0UL))
+      grew = true;
+
+    // type
+    //
+    if (t[2UL])
+    {
+      i.type_value.capacity (i.type_size);
+      grew = true;
+    }
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::dependency_alternatives_ex, id_sqlite >::
+  bind (sqlite::bind* b,
+        image_type& i,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (b);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    std::size_t n (0);
+    ODB_POTENTIALLY_UNUSED (n);
+
+    // dependency_alternatives base
+    //
+    composite_value_traits< ::bpkg::dependency_alternatives, id_sqlite >::bind (b + n, i, sk);
+    n += 2UL;
+
+    // type
+    //
+    b[n].type = sqlite::image_traits<
+      ::bpkg::optional_string,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.type_value.data ();
+    b[n].size = &i.type_size;
+    b[n].capacity = i.type_value.capacity ();
+    b[n].is_null = &i.type_null;
+    n++;
+  }
+
+  bool access::composite_value_traits< ::bpkg::dependency_alternatives_ex, id_sqlite >::
+  init (image_type& i,
+        const value_type& o,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    bool grew (false);
+
+    // dependency_alternatives base
+    //
+    if (composite_value_traits< ::bpkg::dependency_alternatives, id_sqlite >::init (i, o, sk))
+      grew = true;
+
+    // type
+    //
+    {
+      ::butl::optional< ::bpkg::test_dependency_type > const& v =
+        o.type;
+
+      // From package.hxx:617:14
+      ::bpkg::optional_string const& vt =
+        (v) ? to_string ( * (v)) : bpkg::optional_string ();
+
+      bool is_null (true);
+      std::size_t cap (i.type_value.capacity ());
+      sqlite::value_traits<
+          ::bpkg::optional_string,
+          sqlite::id_text >::set_image (
+        i.type_value,
+        i.type_size,
+        is_null,
+        vt);
+      i.type_null = is_null;
+      grew = grew || (cap != i.type_value.capacity ());
+    }
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::dependency_alternatives_ex, id_sqlite >::
+  init (value_type& o,
+        const image_type&  i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // dependency_alternatives base
+    //
+    composite_value_traits< ::bpkg::dependency_alternatives, id_sqlite >::init (o, i, db);
+
+    // type
+    //
+    {
+      ::butl::optional< ::bpkg::test_dependency_type >& v =
+        o.type;
+
+      ::bpkg::optional_string vt;
+
+      sqlite::value_traits<
+          ::bpkg::optional_string,
+          sqlite::id_text >::set_value (
+        vt,
+        i.type_value,
+        i.type_size,
+        i.type_null);
+
+      // From package.hxx:617:14
+      v = (vt) ? bpkg::to_test_dependency_type ( * (vt)) : bpkg::optional_test_dependency_type ();
+    }
+  }
+
+  // available_package_id
+  //
+
+  bool access::composite_value_traits< ::bpkg::available_package_id, id_sqlite >::
+  grow (image_type& i,
+        bool* t)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (t);
+
+    bool grew (false);
+
+    // name
+    //
+    if (t[0UL])
+    {
+      i.name_value.capacity (i.name_size);
+      grew = true;
+    }
+
+    // version
+    //
+    if (composite_value_traits< ::bpkg::canonical_version, id_sqlite >::grow (
+          i.version_value, t + 1UL))
+      grew = true;
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::available_package_id, id_sqlite >::
+  bind (sqlite::bind* b,
+        image_type& i,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (b);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    std::size_t n (0);
+    ODB_POTENTIALLY_UNUSED (n);
+
+    // name
+    //
+    b[n].type = sqlite::image_traits<
+      ::bpkg::package_name,
+      sqlite::id_text>::bind_value;
+    b[n].buffer = i.name_value.data ();
+    b[n].size = &i.name_size;
+    b[n].capacity = i.name_value.capacity ();
+    b[n].is_null = &i.name_null;
+    n++;
+
+    // version
+    //
+    composite_value_traits< ::bpkg::canonical_version, id_sqlite >::bind (
+      b + n, i.version_value, sk);
+    n += 5UL;
+  }
+
+  bool access::composite_value_traits< ::bpkg::available_package_id, id_sqlite >::
+  init (image_type& i,
+        const value_type& o,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    bool grew (false);
+
+    // name
+    //
+    {
+      ::bpkg::package_name const& v =
+        o.name;
+
+      bool is_null (false);
+      std::size_t cap (i.name_value.capacity ());
+      sqlite::value_traits<
+          ::bpkg::package_name,
+          sqlite::id_text >::set_image (
+        i.name_value,
+        i.name_size,
+        is_null,
+        v);
+      i.name_null = is_null;
+      grew = grew || (cap != i.name_value.capacity ());
+    }
+
+    // version
+    //
+    {
+      ::bpkg::canonical_version const& v =
+        o.version;
+
+      if (composite_value_traits< ::bpkg::canonical_version, id_sqlite >::init (
+            i.version_value,
+            v,
+            sk))
+        grew = true;
+    }
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::available_package_id, id_sqlite >::
+  init (value_type& o,
+        const image_type&  i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // name
+    //
+    {
+      ::bpkg::package_name& v =
+        o.name;
+
+      sqlite::value_traits<
+          ::bpkg::package_name,
+          sqlite::id_text >::set_value (
+        v,
+        i.name_value,
+        i.name_size,
+        i.name_null);
+    }
+
+    // version
+    //
+    {
+      ::bpkg::canonical_version& v =
+        o.version;
+
+      composite_value_traits< ::bpkg::canonical_version, id_sqlite >::init (
+        v,
+        i.version_value,
+        db);
+    }
+  }
+
+  // _dependency_alternative_key
+  //
+
+  bool access::composite_value_traits< ::bpkg::available_package::_dependency_alternative_key, id_sqlite >::
+  grow (image_type& i,
+        bool* t)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (t);
+
+    bool grew (false);
+
+    // outer
+    //
+    t[0UL] = false;
+
+    // inner
+    //
+    t[1UL] = false;
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::available_package::_dependency_alternative_key, id_sqlite >::
+  bind (sqlite::bind* b,
+        image_type& i,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (b);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    std::size_t n (0);
+    ODB_POTENTIALLY_UNUSED (n);
+
+    // outer
+    //
+    b[n].type = sqlite::bind::integer;
+    b[n].buffer = &i.outer_value;
+    b[n].is_null = &i.outer_null;
+    n++;
+
+    // inner
+    //
+    b[n].type = sqlite::bind::integer;
+    b[n].buffer = &i.inner_value;
+    b[n].is_null = &i.inner_null;
+    n++;
+  }
+
+  bool access::composite_value_traits< ::bpkg::available_package::_dependency_alternative_key, id_sqlite >::
+  init (image_type& i,
+        const value_type& o,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    bool grew (false);
+
+    // outer
+    //
+    {
+      ::bpkg::available_package::_dependency_alternative_key::outer_type const& v =
+        o.outer;
+
+      bool is_null (false);
+      sqlite::value_traits<
+          ::bpkg::available_package::_dependency_alternative_key::outer_type,
+          sqlite::id_integer >::set_image (
+        i.outer_value,
+        is_null,
+        v);
+      i.outer_null = is_null;
+    }
+
+    // inner
+    //
+    {
+      ::bpkg::available_package::_dependency_alternative_key::inner_type const& v =
+        o.inner;
+
+      bool is_null (false);
+      sqlite::value_traits<
+          ::bpkg::available_package::_dependency_alternative_key::inner_type,
+          sqlite::id_integer >::set_image (
+        i.inner_value,
+        is_null,
+        v);
+      i.inner_null = is_null;
+    }
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::available_package::_dependency_alternative_key, id_sqlite >::
+  init (value_type& o,
+        const image_type&  i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // outer
+    //
+    {
+      ::bpkg::available_package::_dependency_alternative_key::outer_type& v =
+        o.outer;
+
+      sqlite::value_traits<
+          ::bpkg::available_package::_dependency_alternative_key::outer_type,
+          sqlite::id_integer >::set_value (
+        v,
+        i.outer_value,
+        i.outer_null);
+    }
+
+    // inner
+    //
+    {
+      ::bpkg::available_package::_dependency_alternative_key::inner_type& v =
+        o.inner;
+
+      sqlite::value_traits<
+          ::bpkg::available_package::_dependency_alternative_key::inner_type,
+          sqlite::id_integer >::set_value (
+        v,
+        i.inner_value,
+        i.inner_null);
+    }
+  }
+
+  // _dependency_key
+  //
+
+  bool access::composite_value_traits< ::bpkg::available_package::_dependency_key, id_sqlite >::
+  grow (image_type& i,
+        bool* t)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (t);
+
+    bool grew (false);
+
+    // outer
+    //
+    t[0UL] = false;
+
+    // middle
+    //
+    t[1UL] = false;
+
+    // inner
+    //
+    t[2UL] = false;
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::available_package::_dependency_key, id_sqlite >::
+  bind (sqlite::bind* b,
+        image_type& i,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (b);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    std::size_t n (0);
+    ODB_POTENTIALLY_UNUSED (n);
+
+    // outer
+    //
+    b[n].type = sqlite::bind::integer;
+    b[n].buffer = &i.outer_value;
+    b[n].is_null = &i.outer_null;
+    n++;
+
+    // middle
+    //
+    b[n].type = sqlite::bind::integer;
+    b[n].buffer = &i.middle_value;
+    b[n].is_null = &i.middle_null;
+    n++;
+
+    // inner
+    //
+    b[n].type = sqlite::bind::integer;
+    b[n].buffer = &i.inner_value;
+    b[n].is_null = &i.inner_null;
+    n++;
+  }
+
+  bool access::composite_value_traits< ::bpkg::available_package::_dependency_key, id_sqlite >::
+  init (image_type& i,
+        const value_type& o,
+        sqlite::statement_kind sk)
+  {
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    using namespace sqlite;
+
+    bool grew (false);
+
+    // outer
+    //
+    {
+      ::bpkg::available_package::_dependency_alternative_dependencies_type::key_type::outer_type const& v =
+        o.outer;
+
+      bool is_null (false);
+      sqlite::value_traits<
+          ::bpkg::available_package::_dependency_alternative_dependencies_type::key_type::outer_type,
+          sqlite::id_integer >::set_image (
+        i.outer_value,
+        is_null,
+        v);
+      i.outer_null = is_null;
+    }
+
+    // middle
+    //
+    {
+      ::bpkg::available_package::_dependency_alternative_dependencies_type::key_type::middle_type const& v =
+        o.middle;
+
+      bool is_null (false);
+      sqlite::value_traits<
+          ::bpkg::available_package::_dependency_alternative_dependencies_type::key_type::middle_type,
+          sqlite::id_integer >::set_image (
+        i.middle_value,
+        is_null,
+        v);
+      i.middle_null = is_null;
+    }
+
+    // inner
+    //
+    {
+      ::bpkg::available_package::_dependency_alternative_dependencies_type::key_type::inner_type const& v =
+        o.inner;
+
+      bool is_null (false);
+      sqlite::value_traits<
+          ::bpkg::available_package::_dependency_alternative_dependencies_type::key_type::inner_type,
+          sqlite::id_integer >::set_image (
+        i.inner_value,
+        is_null,
+        v);
+      i.inner_null = is_null;
+    }
+
+    return grew;
+  }
+
+  void access::composite_value_traits< ::bpkg::available_package::_dependency_key, id_sqlite >::
+  init (value_type& o,
+        const image_type&  i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (o);
+    ODB_POTENTIALLY_UNUSED (i);
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // outer
+    //
+    {
+      ::bpkg::available_package::_dependency_alternative_dependencies_type::key_type::outer_type& v =
+        o.outer;
+
+      sqlite::value_traits<
+          ::bpkg::available_package::_dependency_alternative_dependencies_type::key_type::outer_type,
+          sqlite::id_integer >::set_value (
+        v,
+        i.outer_value,
+        i.outer_null);
+    }
+
+    // middle
+    //
+    {
+      ::bpkg::available_package::_dependency_alternative_dependencies_type::key_type::middle_type& v =
+        o.middle;
+
+      sqlite::value_traits<
+          ::bpkg::available_package::_dependency_alternative_dependencies_type::key_type::middle_type,
+          sqlite::id_integer >::set_value (
+        v,
+        i.middle_value,
+        i.middle_null);
+    }
+
+    // inner
+    //
+    {
+      ::bpkg::available_package::_dependency_alternative_dependencies_type::key_type::inner_type& v =
+        o.inner;
+
+      sqlite::value_traits<
+          ::bpkg::available_package::_dependency_alternative_dependencies_type::key_type::inner_type,
+          sqlite::id_integer >::set_value (
+        v,
+        i.inner_value,
+        i.inner_null);
+    }
+  }
+
+  // available_package
+  //
+
+  struct access::object_traits_impl< ::bpkg::available_package, id_sqlite >::extra_statement_cache_type
+  {
+    sqlite::container_statements_impl< locations_traits > locations;
+    sqlite::container_statements_impl< dependencies_traits > dependencies;
+    sqlite::container_statements_impl< dependency_alternatives_traits > dependency_alternatives;
+    sqlite::container_statements_impl< dependency_alternative_dependencies_traits > dependency_alternative_dependencies;
+    sqlite::container_statements_impl< tests_traits > tests;
+
+    extra_statement_cache_type (
+      sqlite::connection& c,
+      image_type&,
+      id_image_type&,
+      sqlite::binding& id,
+      sqlite::binding&)
+    : locations (c, id),
+      dependencies (c, id),
+      dependency_alternatives (c, id),
+      dependency_alternative_dependencies (c, id),
+      tests (c, id)
+    {
+    }
+  };
+
+  // locations
+  //
+
+  const char access::object_traits_impl< ::bpkg::available_package, id_sqlite >::locations_traits::
+  select_statement[] =
+  "SELECT "
+  "\"main\".\"available_package_locations\".\"repository_fragment\", "
+  "\"main\".\"available_package_locations\".\"location\" "
+  "FROM \"main\".\"available_package_locations\" "
+  "WHERE \"main\".\"available_package_locations\".\"name\"=? AND \"main\".\"available_package_locations\".\"version_epoch\"=? AND \"main\".\"available_package_locations\".\"version_canonical_upstream\"=? AND \"main\".\"available_package_locations\".\"version_canonical_release\"=? AND \"main\".\"available_package_locations\".\"version_revision\"=? AND \"main\".\"available_package_locations\".\"version_iteration\"=?";
+
+  const char access::object_traits_impl< ::bpkg::available_package, id_sqlite >::locations_traits::
+  insert_statement[] =
+  "INSERT INTO \"main\".\"available_package_locations\" "
+  "(\"name\", "
+  "\"version_epoch\", "
+  "\"version_canonical_upstream\", "
+  "\"version_canonical_release\", "
+  "\"version_revision\", "
+  "\"version_iteration\", "
+  "\"repository_fragment\", "
+  "\"location\") "
+  "VALUES "
+  "(?, ?, ?, ?, ?, ?, ?, ?)";
+
+  const char access::object_traits_impl< ::bpkg::available_package, id_sqlite >::locations_traits::
+  delete_statement[] =
+  "DELETE FROM \"main\".\"available_package_locations\" "
+  "WHERE \"name\"=? AND \"version_epoch\"=? AND \"version_canonical_upstream\"=? AND \"version_canonical_release\"=? AND \"version_revision\"=? AND \"version_iteration\"=?";
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::locations_traits::
+  bind (sqlite::bind* b,
+        const sqlite::bind* id,
+        std::size_t id_size,
+        data_image_type& d)
+  {
+    using namespace sqlite;
+
+    statement_kind sk (statement_select);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    size_t n (0);
+
+    // object_id
+    //
+    if (id != 0)
+      std::memcpy (&b[n], id, id_size * sizeof (id[0]));
+    n += id_size;
+
+    // value
+    //
+    composite_value_traits< value_type, id_sqlite >::bind (
+      b + n, d.value_value, sk);
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::locations_traits::
+  grow (data_image_type& i,
+        bool* t)
+  {
+    bool grew (false);
+
+    // value
+    //
+    if (composite_value_traits< value_type, id_sqlite >::grow (
+          i.value_value, t + 0UL))
+      grew = true;
+
+    if (grew)
+      i.version++;
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::locations_traits::
+  init (data_image_type& i,
+        const value_type& v)
+  {
+    using namespace sqlite;
+
+    statement_kind sk (statement_insert);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    bool grew (false);
+
+    // value
+    //
+    {
+      if (composite_value_traits< value_type, id_sqlite >::init (
+            i.value_value,
+            v,
+            sk))
+        grew = true;
+    }
+
+    if (grew)
+      i.version++;
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::locations_traits::
+  init (value_type& v,
+        const data_image_type& i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // value
+    //
+    {
+      composite_value_traits< value_type, id_sqlite >::init (
+        v,
+        i.value_value,
+        db);
+    }
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::locations_traits::
+  insert (index_type, const value_type& v, void* d)
+  {
+    using namespace sqlite;
+
+    statements_type& sts (*static_cast< statements_type* > (d));
+    data_image_type& di (sts.data_image ());
+
+    init (di, v);
+
+    if (sts.data_binding_test_version ())
+    {
+      const binding& id (sts.id_binding ());
+      bind (sts.data_bind (), id.bind, id.count, di);
+      sts.data_binding_update_version ();
+    }
+
+    if (!sts.insert_statement ().execute ())
+      throw object_already_persistent ();
+  }
+
+  bool access::object_traits_impl< ::bpkg::available_package, id_sqlite >::locations_traits::
+  select (index_type&, value_type& v, void* d)
+  {
+    using namespace sqlite;
+    using sqlite::select_statement;
+
+    statements_type& sts (*static_cast< statements_type* > (d));
+    data_image_type& di (sts.data_image ());
+
+    init (v, di, &sts.connection ().database ());
+
+    select_statement& st (sts.select_statement ());
+    select_statement::result r (st.fetch ());
+
+    if (r == select_statement::truncated)
+    {
+      grow (di, sts.select_image_truncated ());
+
+      if (sts.data_binding_test_version ())
+      {
+        bind (sts.data_bind (), 0, sts.id_binding ().count, di);
+        sts.data_binding_update_version ();
+        st.refetch ();
+      }
+    }
+
+    return r != select_statement::no_data;
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::locations_traits::
+  delete_ (void* d)
+  {
+    using namespace sqlite;
+
+    statements_type& sts (*static_cast< statements_type* > (d));
+    sts.delete_statement ().execute ();
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::locations_traits::
+  persist (const container_type& c,
+           statements_type& sts)
+  {
+    using namespace sqlite;
+
+    functions_type& fs (sts.functions ());
+    fs.ordered_ = false;
+    container_traits_type::persist (c, fs);
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::locations_traits::
+  load (container_type& c,
+        statements_type& sts)
+  {
+    using namespace sqlite;
+    using sqlite::select_statement;
+
+    const binding& id (sts.id_binding ());
+
+    if (sts.data_binding_test_version ())
+    {
+      bind (sts.data_bind (), id.bind, id.count, sts.data_image ());
+      sts.data_binding_update_version ();
+    }
+
+    select_statement& st (sts.select_statement ());
+    st.execute ();
+    auto_result ar (st);
+    select_statement::result r (st.fetch ());
+
+    if (r == select_statement::truncated)
+    {
+      data_image_type& di (sts.data_image ());
+      grow (di, sts.select_image_truncated ());
+
+      if (sts.data_binding_test_version ())
+      {
+        bind (sts.data_bind (), 0, id.count, di);
+        sts.data_binding_update_version ();
+        st.refetch ();
+      }
+    }
+
+    bool more (r != select_statement::no_data);
+
+    functions_type& fs (sts.functions ());
+    fs.ordered_ = false;
+    container_traits_type::load (c, more, fs);
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::locations_traits::
+  update (const container_type& c,
+          statements_type& sts)
+  {
+    using namespace sqlite;
+
+    functions_type& fs (sts.functions ());
+    fs.ordered_ = false;
+    container_traits_type::update (c, fs);
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::locations_traits::
+  erase (statements_type& sts)
+  {
+    using namespace sqlite;
+
+    functions_type& fs (sts.functions ());
+    fs.ordered_ = false;
+    container_traits_type::erase (fs);
+  }
+
+  // dependencies
+  //
+
+  const char access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependencies_traits::
+  select_statement[] =
+  "SELECT "
+  "\"main\".\"available_package_dependencies\".\"index\", "
+  "\"main\".\"available_package_dependencies\".\"buildtime\", "
+  "\"main\".\"available_package_dependencies\".\"comment\", "
+  "\"main\".\"available_package_dependencies\".\"type\" "
+  "FROM \"main\".\"available_package_dependencies\" "
+  "WHERE \"main\".\"available_package_dependencies\".\"name\"=? AND \"main\".\"available_package_dependencies\".\"version_epoch\"=? AND \"main\".\"available_package_dependencies\".\"version_canonical_upstream\"=? AND \"main\".\"available_package_dependencies\".\"version_canonical_release\"=? AND \"main\".\"available_package_dependencies\".\"version_revision\"=? AND \"main\".\"available_package_dependencies\".\"version_iteration\"=? ORDER BY \"main\".\"available_package_dependencies\".\"index\"";
+
+  const char access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependencies_traits::
+  insert_statement[] =
+  "INSERT INTO \"main\".\"available_package_dependencies\" "
+  "(\"name\", "
+  "\"version_epoch\", "
+  "\"version_canonical_upstream\", "
+  "\"version_canonical_release\", "
+  "\"version_revision\", "
+  "\"version_iteration\", "
+  "\"index\", "
+  "\"buildtime\", "
+  "\"comment\", "
+  "\"type\") "
+  "VALUES "
+  "(?, ?, ?, ?, ?, ?, ?, ?, ?, ?)";
+
+  const char access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependencies_traits::
+  delete_statement[] =
+  "DELETE FROM \"main\".\"available_package_dependencies\" "
+  "WHERE \"name\"=? AND \"version_epoch\"=? AND \"version_canonical_upstream\"=? AND \"version_canonical_release\"=? AND \"version_revision\"=? AND \"version_iteration\"=?";
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependencies_traits::
+  bind (sqlite::bind* b,
+        const sqlite::bind* id,
+        std::size_t id_size,
+        data_image_type& d)
+  {
+    using namespace sqlite;
+
+    statement_kind sk (statement_select);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    size_t n (0);
+
+    // object_id
+    //
+    if (id != 0)
+      std::memcpy (&b[n], id, id_size * sizeof (id[0]));
+    n += id_size;
+
+    // index
+    //
+    b[n].type = sqlite::bind::integer;
+    b[n].buffer = &d.index_value;
+    b[n].is_null = &d.index_null;
+    n++;
+
+    // value
+    //
+    composite_value_traits< value_type, id_sqlite >::bind (
+      b + n, d.value_value, sk);
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependencies_traits::
+  grow (data_image_type& i,
+        bool* t)
+  {
+    bool grew (false);
+
+    // index
+    //
+    t[0UL] = false;
+
+    // value
+    //
+    if (composite_value_traits< value_type, id_sqlite >::grow (
+          i.value_value, t + 1UL))
+      grew = true;
+
+    if (grew)
+      i.version++;
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependencies_traits::
+  init (data_image_type& i,
+        index_type* j,
+        const value_type& v)
+  {
+    using namespace sqlite;
+
+    statement_kind sk (statement_insert);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    bool grew (false);
+
+    // index
+    //
+    if (j != 0)
+    {
+      bool is_null (false);
+      sqlite::value_traits<
+          index_type,
+          sqlite::id_integer >::set_image (
+        i.index_value,
+        is_null,
+        *j);
+      i.index_null = is_null;
+    }
+
+    // value
+    //
+    {
+      if (composite_value_traits< value_type, id_sqlite >::init (
+            i.value_value,
+            v,
+            sk))
+        grew = true;
+    }
+
+    if (grew)
+      i.version++;
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependencies_traits::
+  init (index_type& j,
+        value_type& v,
+        const data_image_type& i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // index
+    //
+    {
+      sqlite::value_traits<
+          index_type,
+          sqlite::id_integer >::set_value (
+        j,
+        i.index_value,
+        i.index_null);
+    }
+
+    // value
+    //
+    {
+      composite_value_traits< value_type, id_sqlite >::init (
+        v,
+        i.value_value,
+        db);
+    }
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependencies_traits::
+  insert (index_type i, const value_type& v, void* d)
+  {
+    using namespace sqlite;
+
+    statements_type& sts (*static_cast< statements_type* > (d));
+    data_image_type& di (sts.data_image ());
+
+    init (di, &i, v);
+
+    if (sts.data_binding_test_version ())
+    {
+      const binding& id (sts.id_binding ());
+      bind (sts.data_bind (), id.bind, id.count, di);
+      sts.data_binding_update_version ();
+    }
+
+    if (!sts.insert_statement ().execute ())
+      throw object_already_persistent ();
+  }
+
+  bool access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependencies_traits::
+  select (index_type& i, value_type& v, void* d)
+  {
+    using namespace sqlite;
+    using sqlite::select_statement;
+
+    statements_type& sts (*static_cast< statements_type* > (d));
+    data_image_type& di (sts.data_image ());
+
+    init (i, v, di, &sts.connection ().database ());
+
+    select_statement& st (sts.select_statement ());
+    select_statement::result r (st.fetch ());
+
+    if (r == select_statement::truncated)
+    {
+      grow (di, sts.select_image_truncated ());
+
+      if (sts.data_binding_test_version ())
+      {
+        bind (sts.data_bind (), 0, sts.id_binding ().count, di);
+        sts.data_binding_update_version ();
+        st.refetch ();
+      }
+    }
+
+    return r != select_statement::no_data;
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependencies_traits::
+  delete_ (void* d)
+  {
+    using namespace sqlite;
+
+    statements_type& sts (*static_cast< statements_type* > (d));
+    sts.delete_statement ().execute ();
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependencies_traits::
+  persist (const container_type& c,
+           statements_type& sts)
+  {
+    using namespace sqlite;
+
+    functions_type& fs (sts.functions ());
+    fs.ordered_ = true;
+    container_traits_type::persist (c, fs);
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependencies_traits::
+  load (container_type& c,
+        statements_type& sts)
+  {
+    using namespace sqlite;
+    using sqlite::select_statement;
+
+    const binding& id (sts.id_binding ());
+
+    if (sts.data_binding_test_version ())
+    {
+      bind (sts.data_bind (), id.bind, id.count, sts.data_image ());
+      sts.data_binding_update_version ();
+    }
+
+    select_statement& st (sts.select_statement ());
+    st.execute ();
+    auto_result ar (st);
+    select_statement::result r (st.fetch ());
+
+    if (r == select_statement::truncated)
+    {
+      data_image_type& di (sts.data_image ());
+      grow (di, sts.select_image_truncated ());
+
+      if (sts.data_binding_test_version ())
+      {
+        bind (sts.data_bind (), 0, id.count, di);
+        sts.data_binding_update_version ();
+        st.refetch ();
+      }
+    }
+
+    bool more (r != select_statement::no_data);
+
+    functions_type& fs (sts.functions ());
+    fs.ordered_ = true;
+    container_traits_type::load (c, more, fs);
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependencies_traits::
+  update (const container_type& c,
+          statements_type& sts)
+  {
+    using namespace sqlite;
+
+    functions_type& fs (sts.functions ());
+    fs.ordered_ = true;
+    container_traits_type::update (c, fs);
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependencies_traits::
+  erase (statements_type& sts)
+  {
+    using namespace sqlite;
+
+    functions_type& fs (sts.functions ());
+    fs.ordered_ = true;
+    container_traits_type::erase (fs);
+  }
+
+  // dependency_alternatives
+  //
+
+  const char access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternatives_traits::
+  select_statement[] =
+  "SELECT "
+  "\"main\".\"available_package_dependency_alternatives\".\"dependency_index\", "
+  "\"main\".\"available_package_dependency_alternatives\".\"index\", "
+  "\"main\".\"available_package_dependency_alternatives\".\"enable\", "
+  "\"main\".\"available_package_dependency_alternatives\".\"reflect\", "
+  "\"main\".\"available_package_dependency_alternatives\".\"prefer\", "
+  "\"main\".\"available_package_dependency_alternatives\".\"accept\", "
+  "\"main\".\"available_package_dependency_alternatives\".\"require\" "
+  "FROM \"main\".\"available_package_dependency_alternatives\" "
+  "WHERE \"main\".\"available_package_dependency_alternatives\".\"name\"=? AND \"main\".\"available_package_dependency_alternatives\".\"version_epoch\"=? AND \"main\".\"available_package_dependency_alternatives\".\"version_canonical_upstream\"=? AND \"main\".\"available_package_dependency_alternatives\".\"version_canonical_release\"=? AND \"main\".\"available_package_dependency_alternatives\".\"version_revision\"=? AND \"main\".\"available_package_dependency_alternatives\".\"version_iteration\"=?";
+
+  const char access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternatives_traits::
+  insert_statement[] =
+  "INSERT INTO \"main\".\"available_package_dependency_alternatives\" "
+  "(\"name\", "
+  "\"version_epoch\", "
+  "\"version_canonical_upstream\", "
+  "\"version_canonical_release\", "
+  "\"version_revision\", "
+  "\"version_iteration\", "
+  "\"dependency_index\", "
+  "\"index\", "
+  "\"enable\", "
+  "\"reflect\", "
+  "\"prefer\", "
+  "\"accept\", "
+  "\"require\") "
+  "VALUES "
+  "(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)";
+
+  const char access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternatives_traits::
+  delete_statement[] =
+  "DELETE FROM \"main\".\"available_package_dependency_alternatives\" "
+  "WHERE \"name\"=? AND \"version_epoch\"=? AND \"version_canonical_upstream\"=? AND \"version_canonical_release\"=? AND \"version_revision\"=? AND \"version_iteration\"=?";
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternatives_traits::
+  bind (sqlite::bind* b,
+        const sqlite::bind* id,
+        std::size_t id_size,
+        data_image_type& d)
+  {
+    using namespace sqlite;
+
+    statement_kind sk (statement_select);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    size_t n (0);
+
+    // object_id
+    //
+    if (id != 0)
+      std::memcpy (&b[n], id, id_size * sizeof (id[0]));
+    n += id_size;
+
+    // key
+    //
+    composite_value_traits< key_type, id_sqlite >::bind (
+      b + n, d.key_value, sk);
+    n += 2UL;
+
+    // value
+    //
+    composite_value_traits< value_type, id_sqlite >::bind (
+      b + n, d.value_value, sk);
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternatives_traits::
+  grow (data_image_type& i,
+        bool* t)
+  {
+    bool grew (false);
+
+    // key
+    //
+    if (composite_value_traits< key_type, id_sqlite >::grow (
+          i.key_value, t + 0UL))
+      grew = true;
+
+    // value
+    //
+    if (composite_value_traits< value_type, id_sqlite >::grow (
+          i.value_value, t + 2UL))
+      grew = true;
+
+    if (grew)
+      i.version++;
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternatives_traits::
+  init (data_image_type& i,
+        const key_type* k,
+        const value_type& v)
+  {
+    using namespace sqlite;
+
+    statement_kind sk (statement_insert);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    bool grew (false);
+
+    // key
+    //
+    if (k != 0)
+    {
+      composite_value_traits< key_type, id_sqlite >::init (
+        i.key_value,
+        *k,
+        sk);
+    }
+
+    // value
+    //
+    {
+      if (composite_value_traits< value_type, id_sqlite >::init (
+            i.value_value,
+            v,
+            sk))
+        grew = true;
+    }
+
+    if (grew)
+      i.version++;
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternatives_traits::
+  init (key_type& k,
+        value_type& v,
+        const data_image_type& i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // key
+    //
+    {
+      composite_value_traits< key_type, id_sqlite >::init (
+        k,
+        i.key_value,
+        db);
+    }
+
+    // value
+    //
+    {
+      composite_value_traits< value_type, id_sqlite >::init (
+        v,
+        i.value_value,
+        db);
+    }
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternatives_traits::
+  insert (const key_type& k, const value_type& v, void* d)
+  {
+    using namespace sqlite;
+
+    statements_type& sts (*static_cast< statements_type* > (d));
+    data_image_type& di (sts.data_image ());
+
+    init (di, &k, v);
+
+    if (sts.data_binding_test_version ())
+    {
+      const binding& id (sts.id_binding ());
+      bind (sts.data_bind (), id.bind, id.count, di);
+      sts.data_binding_update_version ();
+    }
+
+    if (!sts.insert_statement ().execute ())
+      throw object_already_persistent ();
+  }
+
+  bool access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternatives_traits::
+  select (key_type& k, value_type& v, void* d)
+  {
+    using namespace sqlite;
+    using sqlite::select_statement;
+
+    statements_type& sts (*static_cast< statements_type* > (d));
+    data_image_type& di (sts.data_image ());
+
+    init (k, v, di, &sts.connection ().database ());
+
+    select_statement& st (sts.select_statement ());
+    select_statement::result r (st.fetch ());
+
+    if (r == select_statement::truncated)
+    {
+      grow (di, sts.select_image_truncated ());
+
+      if (sts.data_binding_test_version ())
+      {
+        bind (sts.data_bind (), 0, sts.id_binding ().count, di);
+        sts.data_binding_update_version ();
+        st.refetch ();
+      }
+    }
+
+    return r != select_statement::no_data;
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternatives_traits::
+  delete_ (void* d)
+  {
+    using namespace sqlite;
+
+    statements_type& sts (*static_cast< statements_type* > (d));
+    sts.delete_statement ().execute ();
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternatives_traits::
+  persist (const container_type& c,
+           statements_type& sts)
+  {
+    using namespace sqlite;
+
+    functions_type& fs (sts.functions ());
+    container_traits_type::persist (c, fs);
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternatives_traits::
+  load (container_type& c,
+        statements_type& sts)
+  {
+    using namespace sqlite;
+    using sqlite::select_statement;
+
+    const binding& id (sts.id_binding ());
+
+    if (sts.data_binding_test_version ())
+    {
+      bind (sts.data_bind (), id.bind, id.count, sts.data_image ());
+      sts.data_binding_update_version ();
+    }
+
+    select_statement& st (sts.select_statement ());
+    st.execute ();
+    auto_result ar (st);
+    select_statement::result r (st.fetch ());
+
+    if (r == select_statement::truncated)
+    {
+      data_image_type& di (sts.data_image ());
+      grow (di, sts.select_image_truncated ());
+
+      if (sts.data_binding_test_version ())
+      {
+        bind (sts.data_bind (), 0, id.count, di);
+        sts.data_binding_update_version ();
+        st.refetch ();
+      }
+    }
+
+    bool more (r != select_statement::no_data);
+
+    functions_type& fs (sts.functions ());
+    container_traits_type::load (c, more, fs);
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternatives_traits::
+  update (const container_type& c,
+          statements_type& sts)
+  {
+    using namespace sqlite;
+
+    functions_type& fs (sts.functions ());
+    container_traits_type::update (c, fs);
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternatives_traits::
+  erase (statements_type& sts)
+  {
+    using namespace sqlite;
+
+    functions_type& fs (sts.functions ());
+    container_traits_type::erase (fs);
+  }
+
+  // dependency_alternative_dependencies
+  //
+
+  const char access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternative_dependencies_traits::
+  select_statement[] =
+  "SELECT "
+  "\"main\".\"available_package_dependency_alternative_dependencies\".\"dependency_index\", "
+  "\"main\".\"available_package_dependency_alternative_dependencies\".\"alternative_index\", "
+  "\"main\".\"available_package_dependency_alternative_dependencies\".\"index\", "
+  "\"main\".\"available_package_dependency_alternative_dependencies\".\"dep_name\", "
+  "\"main\".\"available_package_dependency_alternative_dependencies\".\"dep_min_version_epoch\", "
+  "\"main\".\"available_package_dependency_alternative_dependencies\".\"dep_min_version_canonical_upstream\", "
+  "\"main\".\"available_package_dependency_alternative_dependencies\".\"dep_min_version_canonical_release\", "
+  "\"main\".\"available_package_dependency_alternative_dependencies\".\"dep_min_version_revision\", "
+  "\"main\".\"available_package_dependency_alternative_dependencies\".\"dep_min_version_iteration\", "
+  "\"main\".\"available_package_dependency_alternative_dependencies\".\"dep_min_version_upstream\", "
+  "\"main\".\"available_package_dependency_alternative_dependencies\".\"dep_min_version_release\", "
+  "\"main\".\"available_package_dependency_alternative_dependencies\".\"dep_max_version_epoch\", "
+  "\"main\".\"available_package_dependency_alternative_dependencies\".\"dep_max_version_canonical_upstream\", "
+  "\"main\".\"available_package_dependency_alternative_dependencies\".\"dep_max_version_canonical_release\", "
+  "\"main\".\"available_package_dependency_alternative_dependencies\".\"dep_max_version_revision\", "
+  "\"main\".\"available_package_dependency_alternative_dependencies\".\"dep_max_version_iteration\", "
+  "\"main\".\"available_package_dependency_alternative_dependencies\".\"dep_max_version_upstream\", "
+  "\"main\".\"available_package_dependency_alternative_dependencies\".\"dep_max_version_release\", "
+  "\"main\".\"available_package_dependency_alternative_dependencies\".\"dep_min_open\", "
+  "\"main\".\"available_package_dependency_alternative_dependencies\".\"dep_max_open\" "
+  "FROM \"main\".\"available_package_dependency_alternative_dependencies\" "
+  "WHERE \"main\".\"available_package_dependency_alternative_dependencies\".\"name\"=? AND \"main\".\"available_package_dependency_alternative_dependencies\".\"version_epoch\"=? AND \"main\".\"available_package_dependency_alternative_dependencies\".\"version_canonical_upstream\"=? AND \"main\".\"available_package_dependency_alternative_dependencies\".\"version_canonical_release\"=? AND \"main\".\"available_package_dependency_alternative_dependencies\".\"version_revision\"=? AND \"main\".\"available_package_dependency_alternative_dependencies\".\"version_iteration\"=?";
+
+  const char access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternative_dependencies_traits::
+  insert_statement[] =
+  "INSERT INTO \"main\".\"available_package_dependency_alternative_dependencies\" "
+  "(\"name\", "
+  "\"version_epoch\", "
+  "\"version_canonical_upstream\", "
+  "\"version_canonical_release\", "
+  "\"version_revision\", "
+  "\"version_iteration\", "
+  "\"dependency_index\", "
+  "\"alternative_index\", "
+  "\"index\", "
+  "\"dep_name\", "
+  "\"dep_min_version_epoch\", "
+  "\"dep_min_version_canonical_upstream\", "
+  "\"dep_min_version_canonical_release\", "
+  "\"dep_min_version_revision\", "
+  "\"dep_min_version_iteration\", "
+  "\"dep_min_version_upstream\", "
+  "\"dep_min_version_release\", "
+  "\"dep_max_version_epoch\", "
+  "\"dep_max_version_canonical_upstream\", "
+  "\"dep_max_version_canonical_release\", "
+  "\"dep_max_version_revision\", "
+  "\"dep_max_version_iteration\", "
+  "\"dep_max_version_upstream\", "
+  "\"dep_max_version_release\", "
+  "\"dep_min_open\", "
+  "\"dep_max_open\") "
+  "VALUES "
+  "(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)";
+
+  const char access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternative_dependencies_traits::
+  delete_statement[] =
+  "DELETE FROM \"main\".\"available_package_dependency_alternative_dependencies\" "
+  "WHERE \"name\"=? AND \"version_epoch\"=? AND \"version_canonical_upstream\"=? AND \"version_canonical_release\"=? AND \"version_revision\"=? AND \"version_iteration\"=?";
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternative_dependencies_traits::
+  bind (sqlite::bind* b,
+        const sqlite::bind* id,
+        std::size_t id_size,
+        data_image_type& d)
+  {
+    using namespace sqlite;
+
+    statement_kind sk (statement_select);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    size_t n (0);
+
+    // object_id
+    //
+    if (id != 0)
+      std::memcpy (&b[n], id, id_size * sizeof (id[0]));
+    n += id_size;
+
+    // key
+    //
+    composite_value_traits< key_type, id_sqlite >::bind (
+      b + n, d.key_value, sk);
+    n += 3UL;
+
+    // value
+    //
+    composite_value_traits< value_type, id_sqlite >::bind (
+      b + n, d.value_value, sk);
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternative_dependencies_traits::
+  grow (data_image_type& i,
+        bool* t)
+  {
+    bool grew (false);
+
+    // key
+    //
+    if (composite_value_traits< key_type, id_sqlite >::grow (
+          i.key_value, t + 0UL))
+      grew = true;
+
+    // value
+    //
+    if (composite_value_traits< value_type, id_sqlite >::grow (
+          i.value_value, t + 3UL))
+      grew = true;
+
+    if (grew)
+      i.version++;
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternative_dependencies_traits::
+  init (data_image_type& i,
+        const key_type* k,
+        const value_type& v)
+  {
+    using namespace sqlite;
+
+    statement_kind sk (statement_insert);
+    ODB_POTENTIALLY_UNUSED (sk);
+
+    bool grew (false);
+
+    // key
+    //
+    if (k != 0)
+    {
+      composite_value_traits< key_type, id_sqlite >::init (
+        i.key_value,
+        *k,
+        sk);
+    }
+
+    // value
+    //
+    {
+      if (composite_value_traits< value_type, id_sqlite >::init (
+            i.value_value,
+            v,
+            sk))
+        grew = true;
+    }
+
+    if (grew)
+      i.version++;
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternative_dependencies_traits::
+  init (key_type& k,
+        value_type& v,
+        const data_image_type& i,
+        database* db)
+  {
+    ODB_POTENTIALLY_UNUSED (db);
+
+    // key
+    //
+    {
+      composite_value_traits< key_type, id_sqlite >::init (
+        k,
+        i.key_value,
+        db);
+    }
+
+    // value
+    //
+    {
+      composite_value_traits< value_type, id_sqlite >::init (
+        v,
+        i.value_value,
+        db);
+    }
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternative_dependencies_traits::
+  insert (const key_type& k, const value_type& v, void* d)
+  {
+    using namespace sqlite;
+
+    statements_type& sts (*static_cast< statements_type* > (d));
+    data_image_type& di (sts.data_image ());
+
+    init (di, &k, v);
+
+    if (sts.data_binding_test_version ())
+    {
+      const binding& id (sts.id_binding ());
+      bind (sts.data_bind (), id.bind, id.count, di);
+      sts.data_binding_update_version ();
+    }
+
+    if (!sts.insert_statement ().execute ())
+      throw object_already_persistent ();
+  }
+
+  bool access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternative_dependencies_traits::
+  select (key_type& k, value_type& v, void* d)
+  {
+    using namespace sqlite;
+    using sqlite::select_statement;
+
+    statements_type& sts (*static_cast< statements_type* > (d));
+    data_image_type& di (sts.data_image ());
+
+    init (k, v, di, &sts.connection ().database ());
+
+    select_statement& st (sts.select_statement ());
+    select_statement::result r (st.fetch ());
+
+    if (r == select_statement::truncated)
+    {
+      grow (di, sts.select_image_truncated ());
+
+      if (sts.data_binding_test_version ())
+      {
+        bind (sts.data_bind (), 0, sts.id_binding ().count, di);
+        sts.data_binding_update_version ();
+        st.refetch ();
+      }
+    }
+
+    return r != select_statement::no_data;
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternative_dependencies_traits::
+  delete_ (void* d)
+  {
+    using namespace sqlite;
+
+    statements_type& sts (*static_cast< statements_type* > (d));
+    sts.delete_statement ().execute ();
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternative_dependencies_traits::
+  persist (const container_type& c,
+           statements_type& sts)
+  {
+    using namespace sqlite;
+
+    functions_type& fs (sts.functions ());
+    container_traits_type::persist (c, fs);
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alternative_dependencies_traits::
+  load (container_type& c,
+        statements_type& sts)
+  {
+    using namespace sqlite;
+    using sqlite::select_statement;
+
+    const binding& id (sts.id_binding ());
+
+    if (sts.data_binding_test_version ())
+    {
+      bind (sts.data_bind (), id.bind, id.count, sts.data_image ());
+      sts.data_binding_update_version ();
+    }
+
+    select_statement& st (sts.select_statement ());
+    st.execute ();
+    auto_result ar (st);
+    select_statement::result r (st.fetch ());
+
+    if (r == select_statement::truncated)
+    {
+      data_image_type& di (sts.data_image ());
+      grow (di, sts.select_image_truncated ());
+
+      if (sts.data_binding_test_version ())
+      {
+        bind (sts.data_bind (), 0, id.count, di);
+        sts.data_binding_update_version ();
+        st.refetch ();
+      }
+    }
+
+    bool more (r != select_statement::no_data);
+
+    functions_type& fs (sts.functions ());
+    container_traits_type::load (c, more, fs);
+  }
+
+  void access::object_traits_impl< ::bpkg::available_package, id_sqlite >::dependency_alterna