sample sbt task

gistfile1.scala

object Build extends sbt.Build {
  lazy val fooUtil = Project(
    // ..
  )

  val sample = TaskKey[Unit]("sample-task")
  val sampleTask = sample := {
    println("in sample-task")
    (unmanagedSourceDirectories in (fooUtil, Compile)) map {(ds: Seq[java.io.File]) =>
      println(ds.mkString(", "))
    }
    println("sample-task done ..")
  }
}