Removes files from //build that we don't need

build/linux/unbundle/remove_bundled_libraries.py

-#!/usr/bin/env python
-# Copyright 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.
-
-"""
-Removes bundled libraries to make sure they are not used.
-
-See README for more details.
-"""
-
-
-import optparse
-import os.path
-import sys
-
-
-def DoMain(argv):
-  my_dirname = os.path.abspath(os.path.dirname(__file__))
-  source_tree_root = os.path.abspath(
-    os.path.join(my_dirname, '..', '..', '..'))
-
-  if os.path.join(source_tree_root, 'build', 'linux', 'unbundle') != my_dirname:
-    print ('Sanity check failed: please run this script from ' +
-           'build/linux/unbundle directory.')
-    return 1
-
-  parser = optparse.OptionParser()
-  parser.add_option('--do-remove', action='store_true')
-
-  options, args = parser.parse_args(argv)
-
-  exclusion_used = {}
-  for exclusion in args:
-    exclusion_used[exclusion] = False
-
-  for root, dirs, files in os.walk(source_tree_root, topdown=False):
-    # Only look at paths which contain a "third_party" component
-    # (note that e.g. third_party.png doesn't count).
-    root_relpath = os.path.relpath(root, source_tree_root)
-    if 'third_party' not in root_relpath.split(os.sep):
-      continue
-
-    for f in files:
-      path = os.path.join(root, f)
-      relpath = os.path.relpath(path, source_tree_root)
-
-      excluded = False
-      for exclusion in args:
-        # Require precise exclusions. Find the right-most third_party
-        # in the relative path, and if there is more than one ignore
-        # the exclusion if it's completely contained within the part
-        # before right-most third_party path component.
-        split = relpath.rsplit(os.sep + 'third_party' + os.sep, 1)
-        if len(split) > 1 and split[0].startswith(exclusion):
-          continue
-
-        if relpath.startswith(exclusion):
-          # Multiple exclusions can match the same path. Go through all of them
-          # and mark each one as used.
-          exclusion_used[exclusion] = True
-          excluded = True
-      if excluded:
-        continue
-
-      # Deleting gyp files almost always leads to gyp failures.
-      # These files come from Chromium project, and can be replaced if needed.
-      if f.endswith('.gyp') or f.endswith('.gypi'):
-        continue
-
-      # Deleting .isolate files leads to gyp failures. They are usually
-      # not used by a distro build anyway.
-      # See http://www.chromium.org/developers/testing/isolated-testing
-      # for more info.
-      if f.endswith('.isolate'):
-        continue
-
-      if options.do_remove:
-        # Delete the file - best way to ensure it's not used during build.
-        os.remove(path)
-      else:
-        # By default just print paths that would be removed.
-        print path
-
-  exit_code = 0
-
-  # Fail if exclusion list contains stale entries - this helps keep it
-  # up to date.
-  for exclusion, used in exclusion_used.iteritems():
-    if not used:
-      print '%s does not exist' % exclusion
-      exit_code = 1
-
-  if not options.do_remove:
-    print ('To actually remove files printed above, please pass ' +
-           '--do-remove flag.')
-
-  return exit_code
-
-
-if __name__ == '__main__':
-  sys.exit(DoMain(sys.argv[1:]))