Add support for package build configurations

1 files changed, 0 insertions, 255 deletions

diff --git a/mod/build-config.cxx b/mod/build-config.cxx
deleted file mode 100644
index 8fbbf99..0000000
--- a/mod/build-config.cxx
+++ /dev/null
@@ -1,255 +0,0 @@
-// file      : mod/build-config-module.cxx -*- C++ -*-
-// license   : MIT; see accompanying LICENSE file
-
-#include <mod/build-config.hxx>
-
-#include <libbutl/utility.hxx>      // alpha(), etc.
-#include <libbutl/path-pattern.hxx>
-
-namespace brep
-{
-  using namespace std;
-  using namespace butl;
-  using namespace bpkg;
-  using namespace bbot;
-
-  // The default underlying class set expressions (see below).
-  //
-  static const build_class_expr default_ucs_expr (
-    {"default"}, '+', "Default.");
-
-  static const build_class_expr all_ucs_expr (
-    {"all"}, '+', "All.");
-
-  bool
-  exclude (const small_vector<build_class_expr, 1>& exprs,
-           const vector<build_constraint>& constrs,
-           const build_config& cfg,
-           const map<string, string>& class_inheritance_map,
-           string* reason,
-           bool default_all_ucs)
-  {
-    // Save the first sentence of the reason, lower-case the first letter if
-    // the beginning looks like a word (all subsequent characters until a
-    // whitespace are lower-case letters).
-    //
-    auto sanitize = [] (const string& reason)
-    {
-      string r (reason.substr (0, reason.find ('.')));
-
-      char c (r[0]); // Can be '\0'.
-      if (alpha (c) && c == ucase (c))
-      {
-        bool word (true);
-
-        for (size_t i (1);
-             i != r.size () && (c = r[i]) != ' ' && c != '\t' && c != '\n';
-             ++i)
-        {
-          // Is not a word if contains a non-letter or an upper-case letter.
-          //
-          if (!alpha (c) || c == ucase (c))
-          {
-            word = false;
-            break;
-          }
-        }
-
-        if (word)
-          r[0] = lcase (r[0]);
-      }
-
-      return r;
-    };
-
-    // First, match the configuration against the package underlying build
-    // class set and expressions.
-    //
-    bool m (false);
-
-    // Match the configuration against an expression, updating the match
-    // result.
-    //
-    // We will use a comment of the first encountered excluding expression
-    // (changing the result from true to false) or non-including one (leaving
-    // the false result) as an exclusion reason.
-    //
-    auto match = [&cfg, &m, reason, &sanitize, &class_inheritance_map]
-                 (const build_class_expr& e)
-    {
-      bool pm (m);
-      e.match (cfg.classes, class_inheritance_map, m);
-
-      if (reason != nullptr)
-      {
-        // Reset the reason which, if saved, makes no sense anymore.
-        //
-        if (m)
-        {
-          reason->clear ();
-        }
-        else if (reason->empty () &&
-                 //
-                 // Exclusion.
-                 //
-                 (pm              ||
-                  //
-                  // Non-inclusion. Make sure that the build class expression
-                  // is empty or starts with an addition (+...).
-                  //
-                  e.expr.empty () ||
-                  e.expr.front ().operation == '+'))
-        {
-          *reason = sanitize (e.comment);
-        }
-      }
-    };
-
-    // Determine the underlying class set. Note that in the future we can
-    // potentially extend the underlying set with special classes.
-    //
-    const build_class_expr* ucs (
-      !exprs.empty () && !exprs.front ().underlying_classes.empty ()
-      ? &exprs.front ()
-      : nullptr);
-
-    // Note that the combined package build configuration class expression can
-    // be represented as the underlying class set used as a starting set for
-    // the original expressions and a restricting set, simultaneously. For
-    // example, for the expression:
-    //
-    // default legacy : -msvc
-    //
-    // the resulting expression will be:
-    //
-    // +( +default +legacy ) -msvc &( +default +legacy )
-    //
-    // Let's, however, optimize it a bit based on the following facts:
-    //
-    // - If the underlying class set expression (+default +legacy in the above
-    //   example) evaluates to false, then the resulting expression also
-    //   evaluates to false due to the trailing '&' operation. Thus, we don't
-    //   need to evaluate further if that's the case.
-    //
-    // - On the other hand, if the underlying class set expression evaluates
-    //   to true, then we don't need to apply the trailing '&' operation as it
-    //   cannot affect the result.
-    //
-    const build_class_expr& ucs_expr (
-      ucs != nullptr  ? build_class_expr (ucs->underlying_classes,
-                                          '+',
-                                          ucs->comment)            :
-      default_all_ucs ? all_ucs_expr                               :
-                        default_ucs_expr);
-
-    match (ucs_expr);
-
-    if (m)
-    {
-      for (const build_class_expr& e: exprs)
-        match (e);
-    }
-
-    // Exclude the configuration if it doesn't match the compound expression.
-    //
-    if (!m)
-      return true;
-
-    // Now check if the configuration is excluded/included via the patterns.
-    //
-    // To implement matching of absent name components with wildcard-only
-    // pattern components we are going to convert names to paths (see
-    // dash_components_to_path() for details).
-    //
-    // And if any of the build-{include,exclude} values (which is legal) or
-    // the build configuration name/target (illegal) are invalid paths, then
-    // we assume no match.
-    //
-    if (!constrs.empty ())
-    try
-    {
-      path cn (dash_components_to_path (cfg.name));
-      path tg (dash_components_to_path (cfg.target.string ()));
-
-      for (const build_constraint& c: constrs)
-      {
-        if (path_match (cn,
-                        dash_components_to_path (c.config),
-                        dir_path () /* start */,
-                        path_match_flags::match_absent) &&
-            (!c.target ||
-             path_match (tg,
-                         dash_components_to_path (*c.target),
-                         dir_path () /* start */,
-                         path_match_flags::match_absent)))
-        {
-          if (!c.exclusion)
-            return false;
-
-          if (reason != nullptr)
-            *reason = sanitize (c.comment);
-
-          return true;
-        }
-      }
-    }
-    catch (const invalid_path&) {}
-
-    return false;
-  }
-
-  path
-  dash_components_to_path (const string& pattern)
-  {
-    string r;
-    size_t nstar (0);
-    for (const path_pattern_term& pt: path_pattern_iterator (pattern))
-    {
-      switch (pt.type)
-      {
-      case path_pattern_term_type::star:
-        {
-          // Replace ** with */**/* and skip all the remaining stars that may
-          // follow in this sequence.
-          //
-          if (nstar == 0)
-            r += "*";
-          else if (nstar == 1)
-            r += "/**/*"; // The first star is already copied.
-
-          break;
-        }
-      case path_pattern_term_type::literal:
-        {
-          // Replace '-' with '/' and fall through otherwise.
-          //
-          if (get_literal (pt) == '-')
-          {
-            r += '/';
-            break;
-          }
-        }
-        // Fall through.
-      default:
-        {
-          r.append (pt.begin, pt.end); // Copy the pattern term as is.
-        }
-      }
-
-      nstar = pt.star () ? nstar + 1 : 0;
-    }
-
-    // Append the trailing slash to match the resulting paths as directories.
-    // This is required for the trailing /* we could append to match absent
-    // directory path components (see path_match_flags::match_absent for
-    // details).
-    //
-    // Note that valid dash components may not contain a trailing dash.
-    // Anyway, any extra trailing slashes will be ignored by the path
-    // constructor.
-    //
-    r += '/';
-
-    return path (move (r));
-  }
-}