Annotations not found for CommandApp

[dimitriho]

It seems that caseapp can't find annotations on commands.

When running the following command in sbt:

sbt:case-app-root> testsJVM/test:runMain caseapp.demo.CommandAppTest --help

I expect to see:

Demo
Usage: demo-cli [options] [command] [command-options]

Available commands: first, second

Type  demo-cli command --help  for help on an individual command

Actual result:

None.type
Usage: none.type [options] [command] [command-options]

Available commands: first, second

Type  none.type command --help  for help on an individual command

[cornerman]

I have the same problem and found the following workaround for now. My App implements the base class CommandAppWithPreCommand instead of CommandApp. There I can pass an implicit Help instance, which automatically extracts the annotations into the usage-help.

object Main extends CommandAppWithPreCommand[AppOptions, AppCommand] {
  def run(cmd: AppCommand, args: RemainingArgs): Unit = ???

   // copied from CommandApp
  def beforeCommand(options: AppOptions, remainingArgs: Seq[String]): Unit = {
    if (remainingArgs.nonEmpty) {
      Console.err.println(s"Found extra arguments: ${remainingArgs.mkString(" ")}")
      sys.exit(255)
    }
  }
}

It will now take all the annotations into account that you have on the AppOptions class. You can even use the AppOptions class to have options that work across all commands.

[kpritam]

I was really excited to replace scopt with case-app but hit with this bug!
Is this going to be fixed in near future?

[kpritam]

Just figured out that you can do this like shown below

object SequencerApp extends CommandApp[SequencerAppCommand] {
  override def appName: String    = getClass.getSimpleName.dropRight(1) // remove $ from class name
  override def appVersion: String = BuildInfo.version
  override def progName: String   = BuildInfo.name

  def run(command: SequencerAppCommand, args: RemainingArgs): Unit =
    command match {
      case SequenceComponent(name) => new SequenceComponentWiring(name).start()
      case Sequencer(id, mode)     => new SequencerWiring(id, mode).start()
    }
}