Add offline support to pub install and update.

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

Index: sdk/lib/_internal/pub/lib/src/command_install.dart
diff --git a/sdk/lib/_internal/pub/lib/src/command_install.dart b/sdk/lib/_internal/pub/lib/src/command_install.dart
index d51b553250bf101619744997cd5d29a2f8769102..6c3e510bc933c704dfe4e0d433f209f5d6b7d40d 100644
--- a/sdk/lib/_internal/pub/lib/src/command_install.dart
+++ b/sdk/lib/_internal/pub/lib/src/command_install.dart
@@ -6,6 +6,8 @@ library command_install;
 
 import 'dart:async';
 
+import 'package:args/args.dart';
+
 import 'command.dart';
 import 'entrypoint.dart';
 import 'log.dart' as log;
@@ -15,6 +17,14 @@ class InstallCommand extends PubCommand {
   String get description => "Install the current package's dependencies.";
   String get usage => "pub install";
 
+  ArgParser get commandParser {
+    return new ArgParser()
+        ..addFlag('offline',
+            help: 'Use cached packages instead of accessing the network');

[nweiz, 2013/05/06 23:02:25]

Trailing period.

[Bob Nystrom, 2013/05/07 21:03:09]

We use periods for the command descriptions but not for the options. (I'm not
sure why we do that, but this is at least consistent with the other commands.)

[nweiz, 2013/05/07 21:14:49]

All the global options have periods. I think it's just the publish/uploader
options that don't; those should be fixed.

+  }
+
+  bool get isOffline => commandOptions['offline'];
+
   Future onRun() {
     return entrypoint.installDependencies()
         .then((_) => log.message("Dependencies installed!"));