Merge pull request #181 from sunglim/version_check

--version checks latest version

AUTHORS

@@ -6,3 +6,4 @@
 Google Inc.
 Seth Ladd <[email protected]>
 Devon Carew <[email protected]>
+Sungguk Lim <[email protected]>

lib/src/cli_app.dart

@@ -10,16 +10,19 @@ import 'dart:io' as io;
 import 'dart:math';
 
 import 'package:args/args.dart';
+import 'package:http/http.dart' as http;
 import 'package:path/path.dart' as path;
-import 'package:stagehand/stagehand.dart';
 import 'package:stagehand/analytics/analytics_io.dart';
 import 'package:stagehand/src/common.dart';
+import 'package:stagehand/stagehand.dart';
 
 const String APP_NAME = 'stagehand';
 
 // This version must be updated in tandem with the pubspec version.
 const String APP_VERSION = '0.1.5+1';
 
+const String APP_PUB_INFO = 'https://pub.dartlang.org/packages/stagehand.json';
+
 // The Google Analytics tracking ID for stagehand.
 const String _GA_TRACKING_ID = 'UA-55033590-1';
 
@@ -84,8 +87,14 @@ class CliApp {
     }
 
     if (options['version']) {
-      _out('${APP_NAME} version ${APP_VERSION}');
-      return new Future.value();
+      _out('${APP_NAME} version: ${APP_VERSION}');
+      return http.get(APP_PUB_INFO).then((response) {
+        List versions = JSON.decode(response.body)['versions'];
+        if (APP_VERSION != versions.last) {
+          _out("Version ${versions.last} is available! Run `pub global activate"
+               " stagehand` to get the latest.");
+        }
+      }).catchError((e) => null);
     }
 
     if (options['help'] || args.isEmpty) {

pubspec.yaml

@@ -19,8 +19,9 @@ executables:
 
 dependencies:
   args: ">=0.12.0+1 <0.13.0"
-  path: ">=1.3.0 <2.0.0"
   crypto: ">=0.9.0 <0.10.0"
+  http: ">=0.11.0 <0.12.0"
+  path: ">=1.3.0 <2.0.0"
   uuid: ">=0.4.0 <0.5.0"
 
 dev_dependencies: