app should exit with non-zero exit code and usage/help text when no argument provided

[kpritam]

If you run following example without providing any arguments, app exits with zero exit code without help/usage

sealed trait DemoCommand
case class First(foo: Int, bar: String) extends DemoCommand
case class Second(baz: Double) extends DemoCommand

object MyApp extends CommandApp[DemoCommand] {
  def run(command: DemoCommand, args: RemainingArgs): Unit = {}
}

[AlexanderRay]

Just use

 override def main(args: Array[String]): Unit = {
    if (args.isEmpty) {
      helpAsked()
    } else super.main(args)
  }