sbt.Extracted append-example

import sbt._
import sbt.Keys._

val key1 = TaskKey[String]("key1")

val key2 = TaskKey[String]("key2")

lazy val fooCmd = Command.args("fooCmd", "fooCmd") { (inState: State, args: Seq[String]) =>
    def printKey(k1: TaskKey[_], inState: State) = {
      println(s"check:  ${k1.key.label}")
      val (someState, value) = Project.extract(inState).runTask(k1, inState)
      println(s"value: $value")
      someState
    }
    println(s"in fooCmd")
    val st1: State = Project.extract(inState).append(Seq(key1 := "key1 value"), inState)
    printKey(key1, st1)
    val st2: State = Project.extract(st1).append(Seq(key2 := "key2 value"), st1)
    printKey(key1, st2)
    st2
  }


lazy val main = project.in(file("."))
  .settings(
    name := "append-example",
    commands += fooCmd
  )