Problem

Some project B task depends on running project A. We can not declare dependency directly, because re-start task requires arguments.

Solution

We can define task without arguments, and depend on it:

  lazy val reStart0 = TaskKey[AppProcess]("re-start-0")
  lazy val emptyArgs = SettingKey[revolver.Actions.ExtraCmdLineOptions]("empty-args")

  lazy val projectA = Project(
    id = "hello-a",
    base = file("./a"),
    settings = Project.defaultSettings ++ Revolver.settings
  ).settings(
    emptyArgs := revolver.Actions.ExtraCmdLineOptions(Nil, Nil),
    reStart0 <<= {
    (streams, Revolver.reLogTag, thisProjectRef, Revolver.reForkOptions, mainClass in Revolver.reStart, fullClasspath in Runtime, Revolver.reStartArgs, emptyArgs)
       .map(revolver.Actions.restartApp)
       .dependsOn(products in Compile)
    }
  )

  lazy val projectB = Project(
    id = "hello-b",
    base = file("./b"),
    settings = Project.defaultSettings ++ Revolver.settings ++ Defaults.itSettings)
  .configs(IntegrationTest)
  .settings(
    test in (IntegrationTest) <<= (test in IntegrationTest).dependsOn(reStart0 in projectA)
  )