Sbt 如何从AutoPlugin覆盖默认任务？

假设我想要覆盖（替换）packageBin任务的默认设置。所以我很天真地写了一个这样的自动行李：

object TestPlugin extends AutoPlugin {

  override def trigger = allRequirements

  override val projectSettings: Seq[Def.Setting[_]] = Seq(
    packageBin in Compile <<= (packageBin in Compile).map { a =>
      println("project/compile::packageBin")
      a
    }  
  )

}

---

是否有可能通过AutoPlugin或经典插件实现这一点，如果有，如何实现？

我找到了问题的解决方案

为了确保AutoPlugin的设置不会被默认设置覆盖，必须在默认设置之后应用AutoPlugin中的设置。默认设置由包中的AutoPlugins（CorePlugin、IvyPlugin、JvmPlugin）设置

因此，我所要做的就是通过向我的AutoPlugin添加以下覆盖，使我的AutoPlugin依赖于JvmPlugin：

override def requires: Plugins = JvmPlugin

覆盖的

packageBin

的完整自动装箱如下所示：

import sbt._
import Keys._
import plugins.JvmPlugin

object TestPlugin extends AutoPlugin {

  override def requires = JvmPlugin
  override def trigger = allRequirements

  override val projectSettings: Seq[Def.Setting[_]] = Seq(
    packageBin in Compile <<= (packageBin in Compile).map { a =>
      println("project/compile::packageBin")
      a
    }
  )
}

导入sbt_
导入密钥_
导入plugins.JvmPlugin
对象TestPlugin扩展了AutoPlugin{
覆盖def requires=JvmPlugin
覆盖def触发器=所有要求
覆盖val项目设置：Seq[定义设置[]]=Seq(
Compile中的packageBin只是为了从中完成，这里有一个较短（不一定更容易理解）的解决方案，使用了“被遗忘”操作符
~=
：

import sbt._
import Keys._
import plugins.JvmPlugin

object TestPlugin extends AutoPlugin {

  override def requires = JvmPlugin
  override def trigger = allRequirements

  override val projectSettings: Seq[Def.Setting[_]] = Seq(
    packageBin in Compile ~= { a =>
      println("project/compile::packageBin")
      a
    }
  )
}

或者使用
和最后的
进行副作用的后处理：

import sbt._
import Keys._
import plugins.JvmPlugin

object TestPlugin extends AutoPlugin {

  override def requires = JvmPlugin
  override def trigger = allRequirements

  override val projectSettings: Seq[Def.Setting[_]] = Seq(
    packageBin in Compile <<= (packageBin in Compile) andFinally {
      println("project/compile::packageBin")
    }
  )
}

导入sbt_
导入密钥_
导入plugins.JvmPlugin
对象TestPlugin扩展了AutoPlugin{
覆盖def requires=JvmPlugin
覆盖def触发器=所有要求
覆盖val项目设置：Seq[定义设置[]]=Seq(
Compile中的packageBin
import sbt._
import Keys._
import plugins.JvmPlugin

object TestPlugin extends AutoPlugin {

  override def requires = JvmPlugin
  override def trigger = allRequirements

  override val projectSettings: Seq[Def.Setting[_]] = Seq(
    packageBin in Compile <<= (packageBin in Compile) andFinally {
      println("project/compile::packageBin")
    }
  )
}