Function inject_fsdir_impl

libbuild2/algorithm.cxx:1909–1960

  }

  const fsdir*
  inject_fsdir_impl (target& t, bool prereq, bool parent)
  {
    tracer trace ("inject_fsdir");

    // If t is a directory (name is empty), say foo/bar/, then t is bar and
    // its parent directory is foo/.
    //
    const dir_path& d (parent && t.name.empty () ? t.dir.directory () : t.dir);

    const scope& bs (t.ctx.scopes.find_out (d));
    const scope* rs (bs.root_scope ());

    // If root scope is NULL, then this can mean that we are out of any
    // project or if the directory is in src_root. In both cases we don't
    // inject anything unless explicitly requested.
    //
    // Note that we also used to bail out if this is the root of the
    // project. But that proved not to be such a great idea in case of
    // subprojects (e.g., tests/).
    //
    const fsdir* r (nullptr);

    if (rs != nullptr && !d.sub (rs->src_path ()))
    {
      l6 ([&]{trace << d << " for " << t;});

      // Target is in the out tree, so out directory is empty.
      //
      r = &search<fsdir> (t, d, dir_path (), string (), nullptr, nullptr);
    }
    else if (prereq)
    {
      // See if one was mentioned explicitly.
      //
      for (const prerequisite& p: group_prerequisites (t))
      {
        if (p.is_a<fsdir> ())
        {
          const target& pt (search (t, p));

          if (pt.dir == d)
          {
            r = &pt.as<fsdir> ();
            break;
          }
        }
      }
    }

    return r;
  }

  const fsdir*
  inject_fsdir (action a, target& t, bool match, bool prereq, bool parent)