code: function parseJS(file, options) {
          gutil.log(gutil.colors.cyan('parseJS:'), gutil.colors.green(file.path));
          var content = '';
          if(file.contents) {
              content = file.contents.toString();
          }
          else if(fs.existsSync(file.path)) {
              content = fs.readFileSync(file.path, 'utf-8');
          }
          if(!content) return content;
  
          content = parseJSContent(content, options, file);
          
          file.contents = new Buffer(content);
          return content;
      }
docs: 转换cmd模块代码