scala – 如何使某个sbt任务使用特定的配置范围？

我有一个任务lazy val task = TaskKey [Unit],它将lazy val设置= SettingKey [String]作为输入.我还有三个不同的独立配置范围(config(“dev”),config(“stage”),config(“prod”))和build.sbt文件,它为每个配置范围指定不同的值(在舞台上设置：=“foo”……).

我期望使用配置范围前缀调用任务会使任务使用来自相应配置范围的值(例如> dev：task将使任务使用dev中的设置值,使用命令> stage：task将使任务使用舞台上的设置值,…).但是,这似乎不起作用.

如何强制任务使用特定配置范围中的设置？

build.sbt：

setting := "default setting"

setting in stage := "stage setting"

setting in prod  := "prod setting"

Build.scala：

import sbt._
import Keys._

object TaskBuild extends Build {
  val setting = SettingKey[String]("setting","a simple string setting")

  val task = TaskKey[Unit]("task","a simple task experiment")

  val taskTask = task <<= setting map { s: String =>
    println("Setting is: " + s)
  }

  lazy val dev = config("dev") describedAs("dev environment settings")
  lazy val stage = config("stage") describedAs("stage environment settings")
  lazy val prod = config("prod") describedAs("prod environment settings")

  lazy val root = Project(
    "project",file("."),settings = Defaults.defaultSettings ++ Seq(taskTask)
  )
  .configs(dev,stage,prod)
}

val devTaskSetting = task <<= setting in dev map { s: String =>
   println("Setting in Dev is: " + s)
}

val devTask   = TaskKey[Unit]("task","a simple task experiment") in dev
val stageTask = TaskKey[Unit]("task","a simple task experiment") in stage