code: function compassStyle(input, output) {
      let sassList  = config.sassLib || [],
          inputList = [];
      sassList.forEach((v) => {
          if (!!path.parse(v).dir) {
              inputList.push(v);
          } else {
              try {
                  inputList = inputList.concat(require(v).includePaths);
              } catch (err) {
                  console.log(`没有找到 ${v} 库`);
              }
          }
      });
      task.src(input)
          .pipe(plumberPlugin())
          .pipe(taskIf(styleType === 'scss', sassPlugin({includePaths: inputList})))
          .pipe(connectPlugin.reload())
          .pipe(task.dest(output));
  }
docs: 对项目中的样式文件进行编译
  @param input
  @param output