| // 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. |
| @override |
| usageException(String message) { |
| print(message); |
| printUsage(); |
| exit(1); |
| } |
| } |