Support main methods from traits

[UnaiUribarri-TomTom]

My Main object has grown too large and I want to split it. I tried to create a trait for each entry point and then making the Main object extends all those traits. But in such case, mainargs does not find any of the @main annotated entry points in any of the traits, while it worked flawlessly when all those methods were together in the same Main object.

trait CommandList {
  @main
  def list(@arg v: String): Unit = ???
}

trait CommandCopy {
  @main
  def copy(@arg from: String, @arg to: String): Unit = ???
}

object Main extends CommandList with CommandCopy {
  def main(args: Array[String]): Unit = ParserForMethods(this).runOrExit(args)
}

Is there any way to support this use case? Without having to duplicate the entry point in all of them, of course.

[lihaoyi]

This seems reasonable. I thought it would work already, but I've never tried and I guess if you're opening this ticket it doesn't. Should be implementable