Sbt: Confusing error message when trying to use evaluated on an input key

[matthewfarwell]

Given a build.sbt of

version := "0.0.1"

org.scalastyle.sbt.ScalastylePlugin.Settings

val t = taskKey[Unit]("task")

t := {
  //  org.scalastyle.sbt.PluginKeys.scalastyle is an input key
  val ignored = org.scalastyle.sbt.PluginKeys.scalastyle.evaluated
  // should be
  // val ignored = org.scalastyle.sbt.PluginKeys.scalastyle.toTask("").value
}

and project/plugins.sbt of

resolvers += "sonatype-releases" at "https://oss.sonatype.org/content/repositories/releases/"

addSbtPlugin("org.scalastyle" %% "scalastyle-sbt-plugin" % "0.4.0")

sbt.version = 0.13.1

When reloading sbt, the following message is given:

C:\temp\ff\build.sbt:9: error: `value` can only be called on an input task
within a task definition macro, such as := or Def.inputTask.
  val ignored = org.scalastyle.sbt.PluginKeys.scalastyle.evaluated
                                                         ^
[error] Type error in expression
Project loading failed: (r)etry, (q)uit, (l)ast, or (i)gnore?

This is confusing, because it refers to value, not evaluated. What would be nice would be to say something along the lines of 'should you be using toTask()'

[l15k4]

Guys how to deal with this ?

lazy val startServer = taskKey[Unit]("Start PingPong Server before running JS tests")

(startServer in Test) := {
    println("Starting server!!!")
    val main = (runMain in Compile).fullInput("com.example.PingPongClient")
}

 error: `value` can only be called on an input task within a task definition macro, such as := or Def.inputTask.

[marcadella]

Still an issue in sbt 1.x.x.