code: function generateManifestFile() {
      if (Object.keys(deps).length === 0) {
        this.emit('end');
      } else if (!entryPoint) {
        this.emit('error',
            new gutil.PluginError(PLUGIN_NAME, 'Closure entry point is not specified'));    
      } else {
        var manifest = generateManifest(entryPoint);
  
        var manifestFile = new gutil.File({
          contents: new Buffer(manifest.join('\n')),
          path: fileName
        });
  
        this.emit('data', manifestFile);
        this.emit('end');
      }
    }
docs: Generates a manifest file with one path per line.