Don't allow accidentally publishing to pub.dartlang.org from the dev version of pub.

BUG=https://code.google.com/p/dart/issues/detail?id=7336
R=nweiz@google.com

Review URL: https://codereview.chromium.org//64683012

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@30538 260f80e4-7a28-3924-810f-c04153c831b5

lib/src/command/lish.dart

@@ -15,6 +15,7 @@ import '../http.dart';
 import '../io.dart';
 import '../log.dart' as log;
 import '../oauth2.dart' as oauth2;
+import '../sdk.dart' as sdk;
 import '../source/hosted.dart';
 import '../utils.dart';
 import '../validator.dart';
@@ -93,6 +94,15 @@ class LishCommand extends PubCommand {
   }
 
   Future onRun() {
+    // Sanity check. Don't push to the production server when running tests or
+    // developing on pub.
+    if (sdk.isBleedingEdge &&
+        server.toString() == HostedSource.defaultUrl &&
+        !dryRun) {
+      log.error('Cannot publish to $server from bleeding edge pub!');
+      return null;
+    }
+
     if (force && dryRun) {
       log.error('Cannot use both --force and --dry-run.');
       this.printUsage();