bin/src/usage_exception.dart

// Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'dart:io';
import 'package:args/command_runner.dart';

abstract class PrintUsageException implements Command<void> {
  // TODO(rnystrom): Use "Never" for the return type when this package is
  // migrated to null safety.
  usageException(String message) {
    print(message);
    printUsage();
    exit(1);
  }
}