build/linux/unbundle/remove_bundled_libraries.py

   1 #!/usr/bin/env python
   2 # Copyright 2013 The Chromium Authors. All rights reserved.
   3 # Use of this source code is governed by a BSD-style license that can be
   4 # found in the LICENSE file.
   5
   6 """
   7 Removes bundled libraries to make sure they are not used.
   8
   9 See README for more details.
  10 """
  11
  12
  13 import optparse
  14 import os.path
  15 import sys
  16
  17
  18 def DoMain(argv):
  19   my_dirname = os.path.abspath(os.path.dirname(__file__))
  20   source_tree_root = os.path.abspath(
  21     os.path.join(my_dirname, '..', '..', '..'))
  22
  23   if os.path.join(source_tree_root, 'build', 'linux', 'unbundle') != my_dirname:
  24     print ('Sanity check failed: please run this script from ' +
  25            'build/linux/unbundle directory.')
  26     return 1
  27
  28   parser = optparse.OptionParser()
  29   parser.add_option('--do-remove', action='store_true')
  30
  31   options, args = parser.parse_args(argv)
  32
  33   exclusion_used = {}
  34   for exclusion in args:
  35     exclusion_used[exclusion] = False
  36
  37   for root, dirs, files in os.walk(source_tree_root, topdown=False):
  38     # Only look at paths which contain a "third_party" component
  39     # (note that e.g. third_party.png doesn't count).
  40     root_relpath = os.path.relpath(root, source_tree_root)
  41     if 'third_party' not in root_relpath.split(os.sep):
  42       continue
  43
  44     for f in files:
  45       path = os.path.join(root, f)
  46       relpath = os.path.relpath(path, source_tree_root)
  47
  48       excluded = False
  49       for exclusion in args:
  50         # Require precise exclusions. Find the right-most third_party
  51         # in the relative path, and if there is more than one ignore
  52         # the exclusion if it's completely contained within the part
  53         # before right-most third_party path component.
  54         split = relpath.rsplit(os.sep + 'third_party' + os.sep, 1)
  55         if len(split) > 1 and split[0].startswith(exclusion):
  56           continue
  57
  58         if relpath.startswith(exclusion):
  59           # Multiple exclusions can match the same path. Go through all of them
  60           # and mark each one as used.
  61           exclusion_used[exclusion] = True
  62           excluded = True
  63       if excluded:
  64         continue
  65
  66       # Deleting gyp files almost always leads to gyp failures.
  67       # These files come from Chromium project, and can be replaced if needed.
  68       if f.endswith('.gyp') or f.endswith('.gypi'):
  69         continue
  70
  71       # Deleting .isolate files leads to gyp failures. They are usually
  72       # not used by a distro build anyway.
  73       # See http://www.chromium.org/developers/testing/isolated-testing
  74       # for more info.
  75       if f.endswith('.isolate'):
  76         continue
  77
  78       if options.do_remove:
  79         # Delete the file - best way to ensure it's not used during build.
  80         os.remove(path)
  81       else:
  82         # By default just print paths that would be removed.
  83         print path
  84
  85   exit_code = 0
  86
  87   # Fail if exclusion list contains stale entries - this helps keep it
  88   # up to date.
  89   for exclusion, used in exclusion_used.iteritems():
  90     if not used:
  91       print '%s does not exist' % exclusion
  92       exit_code = 1
  93
  94   if not options.do_remove:
  95     print ('To actually remove files printed above, please pass ' +
  96            '--do-remove flag.')
  97
  98   return exit_code
  99
 100
 101 if __name__ == '__main__':
 102   sys.exit(DoMain(sys.argv[1:]))