Create mock pub links for all packages under pkg, not a hard-coded list

Review URL: https://codereview.chromium.org//11444015

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@15811 260f80e4-7a28-3924-810f-c04153c831b5

pkg/pkg.gyp

@@ -11,15 +11,7 @@
         {
           'action_name': 'make_pkg_packages',
           'inputs': [
-            '../tools/make_links.py',
-            'args/lib',
-            'fixnum/lib',
-            'http/lib',
-            'intl/lib',
-            'logging/lib',
-            'meta/lib',
-            'unittest/lib',
-            'webdriver/lib',
+            '<!@(["python", "../tools/list_pkg_directories.py"])',
           ],
           'outputs': [
             '<(PRODUCT_DIR)/packages',

tools/list_pkg_directories.py

@@ -0,0 +1,17 @@
+#!/usr/bin/env python
+# Copyright (c) 2012, 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.
+
+
+'''Tool for listing the directories under pkg, with their lib directories.
+Used in pkg.gyp. Lists all of the directories in the current directory
+which have a lib subdirectory.
+
+Usage:
+  python tools/list_pkg_directories.py
+'''
+import os
+
+paths = map(lambda x: x + '/lib', filter(os.path.isdir, os.listdir('.')))
+filter(lambda x: os.path.exists(x), paths)