Cannot override command help text

[n3ziniuka5]

I have a command defined like so:

@HelpMessage("help-4")
case object Build extends Command[CommonOptions]:
    override def names: List[List[String]] = List(List("build"))

    override def help =
        super.help.copy(helpMessage = Some(HelpMessage("help-1", "help-2", "help-3")))

    override def run(options: CommonOptions, remainingArgs: RemainingArgs): Unit = ???

And neither of help-* messages are printed when I run the app with --help or build --help.

I've managed to get help-1 text printed for this command with an ovveride in CommandsEntryPoint:

object Main extends CommandsEntryPoint:
    override val commands = List(
      Build
    )

    override def help: RuntimeCommandsHelp =
        super.help.copy(commands = commands.map(cmd => RuntimeCommandHelp(cmd.names, cmd.help, cmd.group, cmd.hidden)))

The only change in the override from the default is cmd.finalHelp was changed to cmd.help.

I think there is an issue with finalHelp implementation, which in 2.1.0-M29 is:

lazy val finalHelp: Help[_] = {
    val h =
      if (hasFullHelp) messages.withFullHelp
      else if (hasHelp) messages.withHelp
      else messages
    if (name == h.progName) h
    else h.withProgName(name)
  }

I think that instead of referencing messages it should instead reference help so that it's possible to modify it.