First pass at build dependency graph for barback.

sdk/lib/_internal/pub/lib/src/command.dart

Index: sdk/lib/_internal/pub/lib/src/command.dart
diff --git a/sdk/lib/_internal/pub/lib/src/command.dart b/sdk/lib/_internal/pub/lib/src/command.dart
index abc2468e41e384272d55ab39d1dca46f09e7b53b..f4a94e245cbc50e0211132cb51eb158170c7a0d2 100644
--- a/sdk/lib/_internal/pub/lib/src/command.dart
+++ b/sdk/lib/_internal/pub/lib/src/command.dart
@@ -2,6 +2,8 @@
 // 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;
+
 import 'dart:io';
 import 'dart:async';
 
@@ -13,6 +15,7 @@ import 'command_deploy.dart';
 import 'command_help.dart';
 import 'command_install.dart';
 import 'command_lish.dart';
+import 'command_serve.dart';
 import 'command_update.dart';
 import 'command_uploader.dart';
 import 'command_version.dart';
@@ -65,7 +68,7 @@ abstract class PubCommand {
         help: 'Print usage information for this command.');
   }
 
-  void run(String cacheDir, ArgResults options) {
+  void run(ArgResults options) {
     commandOptions = options.command;
 
     if (commandOptions['help']) {
@@ -73,7 +76,7 @@ abstract class PubCommand {
       return;
     }
 
-    cache = new SystemCache.withSources(cacheDir, isOffline: isOffline);
+    cache = new SystemCache.withSources(isOffline: isOffline);
 
     handleError(error) {
       var trace = getAttachedStackTrace(error);
@@ -191,6 +194,7 @@ _initCommands() {
     'help': new HelpCommand(),
     'install': new InstallCommand(),
     'publish': new LishCommand(),
+    'serve': new ServeCommand(),
     'update': new UpdateCommand(),
     'uploader': new UploaderCommand(),
     'version': new VersionCommand()