Add publishTo to pubspec and use it in pub lish.

sdk/lib/_internal/pub/test/lish/does_not_publish_if_private_with_server_arg_test.dart

Index: sdk/lib/_internal/pub/test/lish/does_not_publish_if_private_with_server_arg_test.dart
diff --git a/sdk/lib/_internal/pub/test/lish/does_not_publish_if_private_with_server_arg_test.dart b/sdk/lib/_internal/pub/test/lish/does_not_publish_if_private_with_server_arg_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..0aa440395dbb16c927d14bafa4a5338fcfef080c
--- /dev/null
+++ b/sdk/lib/_internal/pub/test/lish/does_not_publish_if_private_with_server_arg_test.dart
@@ -0,0 +1,21 @@
+// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
+// 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.
+
+import '../../lib/src/exit_codes.dart' as exit_codes;
+import '../descriptor.dart' as d;
+import '../test_pub.dart';
+
+main() {
+  initConfig();
+  integration('does not publish if the package is private even if a server '
+      'argument is provided', () {
+    var pkg = packageMap("test_pkg", "1.0.0");
+    pkg["publishTo"] = "none";
+    d.dir(appPath, [d.pubspec(pkg)]).create();
+
+    schedulePub(args: ["lish", "--server", "http://example.com"],
+        error: "A private package cannot be published.",
+        exitCode: exit_codes.DATA);
+  });
+}