Add a pub command for managing uploaders for packages.

utils/tests/pub/oauth2_test.dart

Index: utils/tests/pub/oauth2_test.dart
diff --git a/utils/tests/pub/oauth2_test.dart b/utils/tests/pub/oauth2_test.dart
index f640e114326546ec17a87bafb05d7e2224cdcfc7..08d97fe4861c15f5956ac259827f7f6579e595ec 100644
--- a/utils/tests/pub/oauth2_test.dart
+++ b/utils/tests/pub/oauth2_test.dart
@@ -149,6 +149,36 @@ main() {
 
     run();
   });
+
+  test('with server-rejected credentials, authenticates again and saves '
+      'credentials.json', () {
+    var server = new ScheduledServer();
+    credentialsFile(server, 'access token').scheduleCreate();
+    var pub = startPubLish(server);
+
+    confirmPublish(pub);
+
+    server.handle('GET', '/packages/versions/new.json', (request, response) {
+      response.statusCode = 401;
+      response.headers.set('www-authenticate', 'Bearer error="invalid_token",'
+          ' error_description="your token sucks"');
+      response.outputStream.writeString(JSON.stringify({
+        'error': {'message': 'your token sucks'}
+      }));
+      response.outputStream.close();
+    });
+
+    expectLater(pub.nextErrLine(), equals('OAuth2 authorization failed (your '
+        'token sucks).'));
+    // TODO(rnystrom): The confirm line is run together with this one because
+    // in normal usage, the user will have entered a newline on stdin which
+    // gets echoed to the terminal. Do something better here?
+    expectLater(pub.nextLine(), equals(
+        'Looks great! Are you ready to upload your package (y/n)? '
+        'Pub needs your authorization to upload packages on your behalf.'));
+    pub.kill();
+    run();
+  });
 }
 
 void authorizePub(ScheduledProcess pub, ScheduledServer server,