SBT在编译后应用任务 [英] SBT apply Task after Compile

问题描述

我可以在编译之前自动执行一个任务：

I am able to automatically execute a task before compilation with:

compile in Compile <<= (compile in Compile).dependsOn(myTask)

如何做同样的，但 > compile？

How do I do the same but after compile?

我知道我可以做：

compile in Compile <<= (compile in Compile) map{x=>
  // post-compile work
  doFoo()
  x
}

来执行任意的Scala代码，但是我需要在编译事件发生时自动执行目标任务本身

to execute arbitrary Scala code, but I need to automatically execute the target task itself when a compile event occurs

做类似的操作：

val foo = TaskKey[Unit]("foo", "...")
val fooTask = foo <<= scalaInstance map {si =>
...
} dependsOn(compile in Compile)

从sbt> prompt键入foo即任务在编译后执行，但目标是钩入编译任务本身，所以任何时候编译发生，foo任务在编译完成后自动调用。

works if I type "foo" from sbt> prompt; i.e. task is executed after compile, but the goal is to hook into compile task itself, so anytime a compilation occurs, the foo task is automatically called after compilation completes.

这可能，或者我是以错误的方式挂钩到内置的编译任务？

Is this possible, or am I going about things in the wrong way to hook into the built-in compile task?

推荐答案

，有一些任务取决于你的任务。

In general, there is some task that depends on your task.

如果 compile 用于表示编译和设置然后创建一个 prepareGrunt 任务，该任务取决于 compile 和 myTask 并运行它。

If compile is being used to mean "compile and set things up for Grunt", then create a prepareGrunt task that depends on compile and myTask and run that instead.

如果 myTask 应该在项目的类和资源由其他东西使用，然后使其成为 exportedProducts 的依赖项。 run 和 test 等任务和相关项目中的任务将从该任务获取导出的类路径条目。

If myTask should run before the project's classes and resources are used by something else, then make it a dependency of exportedProducts. Tasks like run and test and tasks in dependent projects will get the exported classpath entries from that task.

在编译后运行一段时间中的危险是， myTask 不会在实际需要它的任务之前运行。在初始化[Task [T]] 上有 triggeredBy 方法，但它很容易被滥用，当已知任务的输出仅在所有任务执行后使用。

The danger in "run sometime after compile" is that myTask won't be run before the task that actually needs it. There is the triggeredBy method on Initialize[Task[T]], but it is easily abused and should only be used when the output of the task is known to be used only after all tasks execute.

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