Add support for pub command aliases.

utils/pub/pub.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.
 
 /**
  * The main entrypoint for the pub command line application.
  */
 library pub;
 
 import '../../pkg/args/lib/args.dart';
@@ skipping 16 matching lines @@
 import 'source_registry.dart';
 import 'system_cache.dart';
 import 'utils.dart';
 import 'version.dart';
 
 Version get pubVersion => new Version(0, 0, 0);
 
 /**
  * The commands that Pub understands.
  */
-Map<String, PubCommand> get pubCommands => {
-  'help': new HelpCommand(),
-  'install': new InstallCommand(),
-  'lish': new LishCommand(),
-  'update': new UpdateCommand(),
-  'version': new VersionCommand()
-};
+Map<String, PubCommand> get pubCommands {
+  var commands = {
+    'help': new HelpCommand(),
+    'install': new InstallCommand(),
+    'publish': new LishCommand(),
+    'update': new UpdateCommand(),
+    'version': new VersionCommand()
+  };
+  for (var command in commands.values) {
+    for (var alias in command.aliases) {
+      commands[alias] = command;
+    }
+  }
+  return commands;
+}
 
 /**
  * The parser for arguments that are global to Pub rather than specific to a
  * single command.
  */
 ArgParser get pubArgParser {
   var parser = new ArgParser();
   parser.addFlag('help', abbr: 'h', negatable: false,
     help: 'Prints this usage information');
   parser.addFlag('version', negatable: false,
@@ skipping 103 matching lines @@
   String get description;
 
   /**
    * How to invoke this command (e.g. `"pub install [package]"`).
    */
   String get usage;
 
   /// Whether or not this command requires [entrypoint] to be defined. If false,
   /// Pub won't look for a pubspec and [entrypoint] will be null when the
   /// command runs.
-  bool get requiresEntrypoint => true;
+  final requiresEntrypoint = true;
+
+  /// Alternate names for this command. These names won't be used in the
+  /// documentation, but they will work when invoked on the command line.
+  final aliases = const <String>[];
 
   /**
    * Override this to define command-specific options. The results will be made
    * available in [commandOptions].
    */
   ArgParser get commandParser => new ArgParser();
 
   void run(SystemCache cache_, ArgResults globalOptions_,
       List<String> commandArgs) {
     cache = cache_;
@@ skipping 94 matching lines @@
     if (exception is HttpException || exception is HttpParserException ||
         exception is SocketIOException || exception is PubHttpException) {
       return exit_codes.UNAVAILABLE;
     } else if (exception is FormatException) {
       return exit_codes.DATA;
     } else {
       return 1;
     }
   }
 }