Add support for pub command aliases.

utils/pub/command_lish.dart

 // Copyright (c) 2012, 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.
 
 library command_lish;
 
 import 'dart:json';
 import 'dart:uri';
 
 import '../../pkg/args/lib/args.dart';
 import '../../pkg/http/lib/http.dart' as http;
 import 'pub.dart';
 import 'io.dart';
 import 'git.dart' as git;
 import 'oauth2.dart' as oauth2;
 
 // TODO(nweiz): Make "publish" the primary name for this command. See issue
 // 6949.
 /// Handles the `lish` and `publish` pub commands.
 class LishCommand extends PubCommand {
-  String get description => "publish the current package to pub.dartlang.org";
-  String get usage => "pub lish [options]";
+  final description = "publish the current package to pub.dartlang.org";
+  final usage = "pub publish [options]";
+  final aliases = const ["lish", "lush"];
 
   ArgParser get commandParser {
     var parser = new ArgParser();
     parser.addOption('server', defaultsTo: 'http://pub.dartlang.org',
         help: 'The package server to which to upload this package');
     return parser;
   }
 
   /// The URL of the server to which to upload the package.
   Uri get server => new Uri.fromString(commandOptions['server']);
@@ skipping 122 matching lines @@
       _invalidServerResponse(response);
     }
     throw errorMap['error']['message'];
   }
 
   /// Throws an error describing an invalid response from the server.
   void _invalidServerResponse(http.Response response) {
     throw 'Invalid server response:\n${response.body}';
   }
 }