Add script to tools/security to check consistency of message file owners.

tools/security/check_message_owners.py

Index: tools/security/check_message_owners.py
diff --git a/tools/security/check_message_owners.py b/tools/security/check_message_owners.py
new file mode 100755
index 0000000000000000000000000000000000000000..b3793f6fb34c751e3da45e02bab76174ccf0adfa
--- /dev/null
+++ b/tools/security/check_message_owners.py
@@ -0,0 +1,53 @@
+#!/usr/bin/env python
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Make sure all of the per-file *_messages.h OWNERS are consistent"""
+
+import os
+import re
+import sys
+
+def main():
+  file_path = os.path.dirname(__file__);
+  root_dir = os.path.abspath(os.path.join(file_path, '..', '..'))
+  owners = collect_owners(root_dir)
+  all_owners = get_all_owners(owners)
+  print_missing_owners(owners, all_owners)
+  return 0
+
+def collect_owners(root_dir):
+  result = {}
+  for root, dirs, files in os.walk(root_dir):
+    if "OWNERS" in files:
+      owner_file_path = os.path.join(root, "OWNERS")
+      owner_set = extract_owners_from_file(owner_file_path)
+      if owner_set:
+        result[owner_file_path] = owner_set
+  return result
+
+def extract_owners_from_file(owner_file_path):
+  result = set()
+  regexp = re.compile('^per-file.*_messages[^=]*=\s*(.*)@([^#]*)')
+  with open(owner_file_path) as f:
+    for line in f:
+      match = regexp.match(line)
+      if match:
+        result.add(match.group(1).strip())
+  return result
+
+def get_all_owners(owner_dict):
+  result = set()
+  for key in owner_dict:
+    result = result.union(owner_dict[key])
+  return result
+
+def print_missing_owners(owner_dict, owner_set):
+  for key in owner_dict:
+    for owner in owner_set:
+      if not owner in owner_dict[key]:
+        print key + " is missing " + owner
+
+if '__main__' == __name__:
+  sys.exit(main())