Split build system into library and driver

1 files changed, 361 insertions, 0 deletions

diff --git a/libbuild2/functions-path.cxx b/libbuild2/functions-path.cxx
new file mode 100644
index 0000000..6e39812
--- /dev/null
+++ b/libbuild2/functions-path.cxx
@@ -0,0 +1,361 @@
+// file      : libbuild2/functions-path.cxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2019 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#include <libbuild2/function.hxx>
+#include <libbuild2/variable.hxx>
+
+using namespace std;
+
+namespace build2
+{
+  static value
+  path_thunk (const scope* base,
+              vector_view<value> args,
+              const function_overload& f)
+  try
+  {
+    return function_family::default_thunk (base, move (args), f);
+  }
+  catch (const invalid_path& e)
+  {
+    fail << "invalid path: '" << e.path << "'" << endf;
+  }
+
+  static value
+  concat_path_string (path l, string sr)
+  {
+    if (path::traits_type::is_separator (sr[0])) // '\0' if empty.
+    {
+      sr.erase (0, 1);
+      path pr (move (sr));
+      pr.canonicalize (); // Convert to canonical directory separators.
+
+      // If RHS is syntactically a directory (ends with a trailing slash),
+      // then return it as dir_path, not path.
+      //
+      if (pr.to_directory () || pr.empty ())
+        return value (
+          path_cast<dir_path> (move (l)) /= path_cast<dir_path> (move (pr)));
+      else
+        l /= pr;
+    }
+    else
+      l += sr;
+
+    return value (move (l));
+  }
+
+  static value
+  concat_dir_path_string (dir_path l, string sr)
+  {
+    if (path::traits_type::is_separator (sr[0])) // '\0' if empty.
+      sr.erase (0, 1);
+
+    path pr (move (sr));
+    pr.canonicalize (); // Convert to canonical directory separators.
+
+    // If RHS is syntactically a directory (ends with a trailing slash), then
+    // return it as dir_path, not path.
+    //
+    return pr.to_directory () || pr.empty ()
+      ? value (move (l /= path_cast<dir_path> (move (pr))))
+      : value (path_cast<path> (move (l)) /= pr);
+  }
+
+  // Return untyped value or NULL value if extension is not present.
+  //
+  static inline value
+  extension (path p)
+  {
+    const char* e (p.extension_cstring ());
+
+    if (e == nullptr)
+      return value ();
+
+    names r;
+    r.emplace_back (e);
+    return value (move (r));
+  }
+
+  template <typename P>
+  static inline P
+  leaf (const P& p, const optional<dir_path>& d)
+  {
+    if (!d)
+      return p.leaf ();
+
+    try
+    {
+      return p.leaf (*d);
+    }
+    catch (const invalid_path&)
+    {
+      fail << "'" << *d << "' is not a prefix of '" << p << "'" << endf;
+    }
+  }
+
+  void
+  path_functions ()
+  {
+    function_family f ("path", &path_thunk);
+
+    // string
+    //
+    f["string"] = [](path p) {return move (p).string ();};
+
+    f["string"] = [](paths v)
+    {
+      strings r;
+      for (auto& p: v)
+        r.push_back (move (p).string ());
+      return r;
+    };
+
+    f["string"] = [](dir_paths v)
+    {
+      strings r;
+      for (auto& p: v)
+        r.push_back (move (p).string ());
+      return r;
+    };
+
+    // representation
+    //
+    f["representation"] = [](path p) {return move (p).representation ();};
+
+    f["representation"] = [](paths v)
+    {
+      strings r;
+      for (auto& p: v)
+        r.push_back (move (p).representation ());
+      return r;
+    };
+
+    f["representation"] = [](dir_paths v)
+    {
+      strings r;
+      for (auto& p: v)
+        r.push_back (move (p).representation ());
+      return r;
+    };
+
+    // canonicalize
+    //
+    f["canonicalize"] = [](path p)     {p.canonicalize (); return p;};
+    f["canonicalize"] = [](dir_path p) {p.canonicalize (); return p;};
+
+    f["canonicalize"] = [](paths v)
+    {
+      for (auto& p: v)
+        p.canonicalize ();
+      return v;
+    };
+
+    f["canonicalize"] = [](dir_paths v)
+    {
+      for (auto& p: v)
+        p.canonicalize ();
+      return v;
+    };
+
+    f[".canonicalize"] = [](names ns)
+    {
+      // For each path decide based on the presence of a trailing slash
+      // whether it is a directory. Return as untyped list of (potentially
+      // mixed) paths.
+      //
+      for (name& n: ns)
+      {
+        if (n.directory ())
+          n.dir.canonicalize ();
+        else
+          n.value = convert<path> (move (n)).canonicalize ().string ();
+      }
+      return ns;
+    };
+
+    // normalize
+    //
+    f["normalize"] = [](path p, optional<value> a)
+    {
+      p.normalize (a && convert<bool> (move (*a)));
+      return p;
+    };
+
+    f["normalize"] = [](dir_path p, optional<value> a)
+    {
+      p.normalize (a && convert<bool> (move (*a)));
+      return p;
+    };
+
+    f["normalize"] = [](paths v, optional<value> a)
+    {
+      bool act (a && convert<bool> (move (*a)));
+
+      for (auto& p: v)
+        p.normalize (act);
+
+      return v;
+    };
+    f["normalize"] = [](dir_paths v, optional<value> a)
+    {
+      bool act (a && convert<bool> (move (*a)));
+
+      for (auto& p: v)
+        p.normalize (act);
+      return v;
+    };
+
+    f[".normalize"] = [](names ns, optional<value> a)
+    {
+      bool act (a && convert<bool> (move (*a)));
+
+      // For each path decide based on the presence of a trailing slash
+      // whether it is a directory. Return as untyped list of (potentially
+      // mixed) paths.
+      //
+      for (name& n: ns)
+      {
+        if (n.directory ())
+          n.dir.normalize (act);
+        else
+          n.value = convert<path> (move (n)).normalize (act).string ();
+      }
+      return ns;
+    };
+
+    // directory
+    //
+    f["directory"] = &path::directory;
+
+    f["directory"] = [](paths v)
+    {
+      dir_paths r;
+      for (const path& p: v)
+        r.push_back (p.directory ());
+      return r;
+    };
+
+    f["directory"] = [](dir_paths v)
+    {
+      for (dir_path& p: v)
+        p = p.directory ();
+      return v;
+    };
+
+    f[".directory"] = [](names ns)
+    {
+      // For each path decide based on the presence of a trailing slash
+      // whether it is a directory. Return as list of directory names.
+      //
+      for (name& n: ns)
+      {
+        if (n.directory ())
+          n.dir = n.dir.directory ();
+        else
+          n = convert<path> (move (n)).directory ();
+      }
+      return ns;
+    };
+
+    // base
+    //
+    f["base"] = &path::base;
+
+    f["base"] = [](paths v)
+    {
+      for (path& p: v)
+        p = p.base ();
+      return v;
+    };
+
+    f["base"] = [](dir_paths v)
+    {
+      for (dir_path& p: v)
+        p = p.base ();
+      return v;
+    };
+
+    f[".base"] = [](names ns)
+    {
+      // For each path decide based on the presence of a trailing slash
+      // whether it is a directory. Return as untyped list of (potentially
+      // mixed) paths.
+      //
+      for (name& n: ns)
+      {
+        if (n.directory ())
+          n.dir = n.dir.base ();
+        else
+          n.value = convert<path> (move (n)).base ().string ();
+      }
+      return ns;
+    };
+
+    // leaf
+    //
+    f["leaf"] = &path::leaf;
+
+    f["leaf"] = [](path p, dir_path d)
+    {
+      return leaf (p, move (d));
+    };
+
+    f["leaf"] = [](paths v, optional<dir_path> d)
+    {
+      for (path& p: v)
+        p = leaf (p, d);
+      return v;
+    };
+
+    f["leaf"] = [](dir_paths v, optional<dir_path> d)
+    {
+      for (dir_path& p: v)
+        p = leaf (p, d);
+      return v;
+    };
+
+    f[".leaf"] = [](names ns, optional<dir_path> d)
+    {
+      // For each path decide based on the presence of a trailing slash
+      // whether it is a directory. Return as untyped list of (potentially
+      // mixed) paths.
+      //
+      for (name& n: ns)
+      {
+        if (n.directory ())
+          n.dir = leaf (n.dir, d);
+        else
+          n.value = leaf (convert<path> (move (n)), d).string ();
+      }
+      return ns;
+    };
+
+    // extension
+    //
+    f["extension"] = &extension;
+
+    f[".extension"] = [](names ns)
+    {
+      return extension (convert<path> (move (ns)));
+    };
+
+    // Path-specific overloads from builtins.
+    //
+    function_family b ("builtin", &path_thunk);
+
+    b[".concat"] = &concat_path_string;
+    b[".concat"] = &concat_dir_path_string;
+
+    b[".concat"] = [](path l, names ur)
+    {
+      return concat_path_string (move (l), convert<string> (move (ur)));
+    };
+
+    b[".concat"] = [](dir_path l, names ur)
+    {
+      return concat_dir_path_string (move (l), convert<string> (move (ur)));
+    };
+  }
+}