即使失败，如何在另一个任务之后执行任务或命令 [英] How to execute a task or command after another task even if it failed

问题描述

我在 sbt 中有一个相当长的运行任务，并且希望在它完成后收到通知，即使它失败了.我用这种粗鲁的方式部分做到了:

I have a rather long running task in sbt and would like to be notified audibly after it finished, even it if failed. I got partially there with this crudeness:

lazy val ding = taskKey[Unit]("plays a ding sound")
ding := {
  Seq("play", "-q", "/…/SmallGlockA.wav").run
}

我像这样调用上述任务:

I invoke aforementioned task like such:

sbt> ;test;ding

虽然如果任务成功，这很有效，但如果任务失败，它当然不会播放声音，考虑到它的测试，这是可能的.

And while this works well if the task succeeded, it will of course not play the sound if the task failed, which – given that it's tests – is likely.

有什么想法可以解决这个问题吗?它不必非常漂亮或超级健壮——这不会被提交，它对我来说只是本地的事情.

Any ideas how I can work around this? It doesn't have to be pretty or super robust – this will not get committed, it will just be a local thing for me.

推荐答案

我想出的解决方案是为 sbt 创建一个 AutoPlugin 来满足您的需求.

The solution I came up with is to create an AutoPlugin for sbt that does what you need.

在project文件夹中新建一个名为DingPlugin.scala的文件，内容如下

Create a new file in project folder named DingPlugin.scala with following content

import sbt.Keys._
import sbt.PluginTrigger.AllRequirements
import sbt._

object DingPlugin extends AutoPlugin {

  private def wavPath = "/path/to/wav"
  private def playSound(wav: String) = ???

  override def trigger = AllRequirements

  override def projectSettings: Seq[Def.Setting[_]] = Seq(
    Test / test := (Test / test).andFinally(playSound(wavPath)).value
  )
}

重点是方法 andFinally 那个

定义一个新任务，该任务运行原始任务并评估副作用，而不管原始任务是否成功.任务结果为原任务结果

defines a new task that runs the original task and evaluates a side effect regardless of whether the original task succeeded. The result of the task is the result of the original task

playSound 的实现来源于这个问题与以下代码

The implementation of playSound is derived from this question with the following code

  private def playSound(wav: String): Unit = {
    import java.io.BufferedInputStream
    import java.io.FileInputStream
    import javax.sound.sampled.AudioSystem
    val clip = AudioSystem.getClip
    val inputStream =
      AudioSystem.getAudioInputStream(
        new BufferedInputStream(new FileInputStream(wav))
      )
    clip.open(inputStream)
    clip.start()
    Thread.sleep(clip.getMicrosecondLength / 1000)
  }

现在，您只需运行sbt test，无论测试是否成功，它都会播放声音.

Now, you can just run sbt test and it will play a sound regardless of whether test succeeded or not.

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