javascript - "grunt watch"总是在发生 fatal error 后停止监视 - 如何让它在几秒钟后自动重试？

Question

在一些元素中，我使用 Grunt 来完成 SASS 编译等任务。基本上它就像一个魅力，但只要我在 SASS 文件中输入，显然有时会发生错误，因为我没有完成。

我的Gruntfile的watch任务是这样的:

// watch files
watch: {
    sass: {
        files: ['web/var/static/**/*.scss','web/var/static/lib/**','web/var/static/js/*.js'],
        tasks: ['default']
    }
},

我在 cli 中使用 grunt watch 启动它。

Grunt 日志中的示例错误:

Completed in 1.968s at Wed Sep 18 2019 13:43:01 GMT+0200 (Central European Summer Time) - Waiting...
>> File "web/var/static/sass/layout/footer.scss" changed.
Running "sass:dist" (sass) task

Running "autoprefixer:dist" (autoprefixer) task
>> 4 autoprefixed stylesheets created.

Running "cssmin:dist" (cssmin) task
>> 4 files created. 706.54 kB → 598.46 kB

Running "concat:dist" (concat) task

Running "uglify:main" (uglify) task

Done.
Completed in 1.769s at Wed Sep 18 2019 13:43:25 GMT+0200 (Central European Summer Time) - Waiting...
>> File "web/var/static/sass/layout/footer.scss" changed.
Running "sass:dist" (sass) task
Fatal error: Error: property "ul" must be followed by a ':'
        on line 52 of web/var/static/sass/layout/footer.scss
        from line 13 of web/var/static/sass/main.scss
>>     ul

   ----^

如果发生这种情况，我总是必须重新运行任务，因为 grunt 停止监视。这意味着:

• 打开控制台窗口
• 停止当前任务
• 再次开始任务
• 更改文件

这真的很慢。

有人遇到过类似的问题吗？一旦发生新文件更改，如何让 grunt 在出错后自动重试？

Answer 1

spawn 方法返回对已生成子项的引用。当 child 退出时，调用 doneFunction。如果出现错误，您可以从以下函数重试:

function doneFunction(error, result, code) {
  // If the exit code was non-zero and a fallback wasn't specified, an Error
  // object, otherwise null.
  error
  // The result object is an object with the properties .stdout, .stderr, and
  // .code (exit code).
  result
  // When result is coerced to a string, the value is stdout if the exit code
  // was zero, the fallback if the exit code was non-zero and a fallback was
  // specified, or stderr if the exit code was non-zero and a fallback was
  // not specified.
  String(result)
  // The numeric exit code.
  code
}