invocation property

Implementation

@override
String get invocation
{
  final parents = [name];
  for (var command = parent; command != null; command = command.parent) {
    parents.add(command.name);
  }
  parents.add(runner!.executableName);
  final invocation = parents.reversed.join(' ');
  if (subcommands.isEmpty) {
    if (arguments.isEmpty) {
      return invocation;
    } else {
      final args = arguments.map((e) => '<${e.name}>').join(' ');
      return '$invocation $args';
    }
  } else {
    return '$invocation <subcommand> [arguments]';
  }
}