anchor.diff:              ok
       end,
       compile_app(Dir).
  +
  +compile_app(Dir) ->
  +    SrcDir = src(Dir),
  +    IncDir = include(Dir),
  +    case file:list_dir(SrcDir) of
  +        {ok, Files} ->
  +            EbinDir = ebin(Dir),
  +            lists:foreach(compile_fun(SrcDir, EbinDir, IncDir), Files);
  +        {error, _} ->
  +            ok
  +    end.
   
   compile_deps([]) ->
       ok;
  
positive.code:             end
      end.
  
  init() ->
      {ok, Cwd} = file:get_cwd(),
      update_path(Cwd).
  
negative.code:     end,
      compile_deps(T).
  
  %% add application directory (its ebin) and its dependencies to the code path
  update_path(Dir) ->
      Ebin = filename:join([Dir, "ebin"]),
      code:add_path(Ebin),
  
      RebarFile = rebar_config_file(Dir),
      case deps(RebarFile) of
          {ok, Deps} ->
              code:add_paths(deps_ebin(Deps));
          {error, _} ->
              ok
      end.
  
  init() ->
      {ok, Cwd} = file:get_cwd(),
      update_path(Cwd).
  
  
  %% internal
  exec(Cmd, Opts) ->
      Opts1 = [concat([" ", X]) || X <- Opts],
      os:cmd(concat([Cmd, concat(Opts1)])).
  