anchor.diff:                      rebar_log:log(error, "Stylus asset processing failed failed:~n  ~p~n",
                              [Reason]),
                       rebar_utils:abort()
  -            end;
  +            end,
  +            ok;
           false ->
               rebar_log:log(error,
                   "Bypassing stylesheet processing of ~s: stylus missing.~n", [DocRoot]),
  
positive.code: %% Public API
  %% ===================================================================
  
  compile(Config, _AppFile) ->
      Options = options(Config),
      OutDir = option(out_dir, Options),
      DocRoot = option(doc_root, Options),
      Stylus = option(stylus_path, Options),
      case stylus_is_present(Stylus) of
          true ->
              Cmd = lists:flatten([Stylus, " -o ", OutDir, " ", DocRoot]),
              ShOpts = [{use_stdout, false}, return_on_error],
              case rebar_utils:sh(Cmd, ShOpts) of
                  {ok, _} ->
  
negative.code: 
  default(doc_root)     -> "priv/assets/stylesheets";
  default(out_dir)      -> "priv/www/stylesheets";
  default(stylus_path)  -> "/usr/local/bin/stylus";
  default(stylesheets)  -> [].
  
  delete_each([]) ->
      ok;
  