[Android] Add tools to find and remove unused Android resources.

BUG=149661

Review URL: https://codereview.chromium.org/13862017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@193520 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 49 insertions, 0 deletions

diff --git a/tools/android/remove_strings.py b/tools/android/remove_strings.py
new file mode 100755
index 0000000..b8c4807
--- /dev/null
+++ b/tools/android/remove_strings.py
@@ -0,0 +1,49 @@
+#!/usr/bin/python
+# Copyright (c) 2013 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.
+
+"""Remove strings by name from a GRD file."""
+
+import optparse
+import re
+import sys
+
+
+def RemoveStrings(grd_path, string_names):
+  """Removes strings with the given names from a GRD file. Overwrites the file.
+
+  Args:
+    grd_path: path to the GRD file.
+    string_names: a list of string names to be removed.
+  """
+  with open(grd_path, 'r') as f:
+    grd = f.read()
+  names_pattern = '|'.join(map(re.escape, string_names))
+  pattern = r'<message [^>]*name="(%s)".*?</message>\s*' % names_pattern
+  grd = re.sub(pattern, '', grd, flags=re.DOTALL)
+  with open(grd_path, 'w') as f:
+    f.write(grd)
+
+
+def ParseArgs(args):
+  usage = 'usage: %prog GRD_PATH...'
+  parser = optparse.OptionParser(
+      usage=usage, description='Remove strings from GRD files. Reads string '
+      'names from stdin, and removes strings with those names from the listed '
+      'GRD files.')
+  options, args = parser.parse_args(args=args)
+  if not args:
+    parser.error('must provide GRD_PATH argument(s)')
+  return args
+
+
+def main(args=None):
+  grd_paths = ParseArgs(args)
+  strings_to_remove = filter(None, map(str.strip, sys.stdin.readlines()))
+  for grd_path in grd_paths:
+    RemoveStrings(grd_path, strings_to_remove)
+
+
+if __name__ == '__main__':
+  main()