Tweak how the pkg files timestamps are created.

tools/list_dart_files.py

+#!/usr/bin/env python
+# Copyright (c) 2016, 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.

[Bill Hesse, 2016/10/04 08:57:18]

Since this tool is all about not hitting the xcode limit on file list length,
could we make the tool check if the length of its output is close to or over
that length, and report an error?

This can be done in a separate CL, or an issue can be filed to do this.

+
+"""Tool for listing Dart source files.
+
+Usage:
+  python tools/list_dart_files.py <directory> <root directory pattern>
+"""
+
+import os
+import re
+import sys
+
+
+def main(argv):
+  directory = argv[1]
+
+  pattern = None
+  if len(argv) > 2:
+    pattern = re.compile(argv[2])
+
+  for root, directories, files in os.walk(directory):
+    # We only care about actual source files, not generated code or tests.
+    for skip_dir in ['.git', 'gen', 'test']:
+      if skip_dir in directories:
+        directories.remove(skip_dir)
+
+    # If we are looking at the root directory, filter the immediate
+    # subdirectories by the given pattern.
+    if pattern and root == directory:
+      directories[:] = filter(pattern.match, directories)
+
+    for filename in files:
+      if filename.endswith('.dart') and not filename.endswith('_test.dart'):
+        fullname = os.path.relpath(os.path.join(root, filename))
+        fullname = fullname.replace(os.sep, '/')
+        print fullname
+
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv))