// file      : build2/cc/compile -*- C++ -*-
// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
// license   : MIT; see accompanying LICENSE file

#ifndef BUILD2_CC_COMPILE
#define BUILD2_CC_COMPILE

#include <butl/path-map>

#include <build2/types>
#include <build2/utility>

#include <build2/rule>

#include <build2/cc/types>
#include <build2/cc/common>

namespace build2
{
  class depdb;

  namespace cc
  {
    class compile: public rule, virtual common
    {
    public:
      compile (data&&);

      virtual match_result
      match (slock&, action, target&, const string& hint) const override;

      virtual recipe
      apply (slock&, action, target&) const override;

      target_state
      perform_update (action, const target&) const;

      target_state
      perform_clean (action, const target&) const;

    private:
      void
      append_lib_options (const scope&,
                          cstrings&,
                          const target&,
                          lorder) const;

      void
      hash_lib_options (const scope&,
                        sha256&,
                        const target&,
                        lorder) const;

      // Mapping of include prefixes (e.g., foo in <foo/bar>) for auto-
      // generated headers to directories where they will be generated.
      //
      // We are using a prefix map of directories (dir_path_map) instead of
      // just a map in order to also cover sub-paths (e.g., <foo/more/bar> if
      // we continue with the example). Specifically, we need to make sure we
      // don't treat foobar as a sub-directory of foo.
      //
      // @@ The keys should be normalized.
      //
      using prefix_map = butl::dir_path_map<dir_path>;

      void
      append_prefixes (prefix_map&, const target&, const variable&) const;

      void
      append_lib_prefixes (const scope&, prefix_map&, target&, lorder) const;

      prefix_map
      build_prefix_map (const scope&, target&, lorder) const;

      // Reverse-lookup target type from extension.
      //
      const target_type*
      map_extension (const scope&, const string&, const string&) const;

      // Header dependency injection.
      //
      void
      inject (slock&, action, target&, lorder, file&, depdb&) const;

    private:
      const string rule_id;
    };
  }
}

#endif // BUILD2_CC_COMPILE