docs: function fileToURL(output, filePath) {
      var options = output.getOptions();
      var directoryIndex = options.get('directoryIndex');
  
      filePath = fileToOutput(output, filePath);
  
      if (directoryIndex && path.basename(filePath) == 'index.html') {
          filePath = path.dirname(filePath) + '/';
      }
  
      return LocationUtils.normalize(filePath);
  }