DEPS: Sync Git subtree mirrors instead of symlinking into chromium/src

sync_chromium.py

-#!/usr/bin/env python
-# Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
-#
-# Use of this source code is governed by a BSD-style license
-# that can be found in the LICENSE file in the root of the source
-# tree. An additional intellectual property rights grant can be found
-# in the file PATENTS.  All contributing project authors may
-# be found in the AUTHORS file in the root of the source tree.
-
-"""Script to download a Chromium checkout into the workspace.
-
-The script downloads a full Chromium Git clone and its DEPS.
-
-The following environment variable can be used to alter the behavior:
-* CHROMIUM_NO_HISTORY - If set to 1, a Git checkout with no history will be
-  downloaded. This is consumes less bandwidth and disk space but is known to be
-  slower in general if you have a high-speed connection.
-
-After a successful sync has completed, a .last_sync_chromium file is written to
-the chromium directory. While it exists, no more gclient sync operations will be
-performed until the --target-revision changes or the SCRIPT_VERSION constant is
-incremented. The file can be removed manually to force a new sync.
-"""
-
-import argparse
-import os
-import shutil
-import subprocess
-import sys
-import textwrap
-
-# Bump this whenever the algorithm changes and you need bots/devs to re-sync,
-# ignoring the .last_sync_chromium file
-SCRIPT_VERSION = 8
-
-ROOT_DIR = os.path.dirname(os.path.abspath(__file__))
-CHROMIUM_NO_HISTORY = 'CHROMIUM_NO_HISTORY'
-
-# Duplicated from depot_tools/gclient.py since we cannot depend on that:
-DEPS_OS_CHOICES = {
-  "win32": "win",
-  "win": "win",
-  "cygwin": "win",
-  "darwin": "mac",
-  "mac": "mac",
-  "unix": "unix",
-  "linux": "unix",
-  "linux2": "unix",
-  "linux3": "unix",
-  "android": "android",
-}
-
-def _parse_gclient_dict():
-  gclient_dict = {}
-  try:
-    main_gclient = os.path.join(os.path.dirname(ROOT_DIR), '.gclient')
-    with open(main_gclient, 'rb') as deps_content:
-      exec(deps_content, gclient_dict)
-  except Exception as e:
-    print >> sys.stderr, 'error while parsing .gclient:', e
-  return gclient_dict
-
-
-def get_cache_dir():
-  return _parse_gclient_dict().get('cache_dir')
-
-
-def get_target_os_list():
-  # Always add the currently running OS since the --deps option will override
-  # that if specified:
-  target_os_list = [DEPS_OS_CHOICES.get(sys.platform, 'unix')]
-  # Add any target_os entries from .gclient.
-  target_os_list += _parse_gclient_dict().get('target_os', [])
-  return ','.join(target_os_list)
-
-
-def main():
-  CR_DIR = os.path.join(ROOT_DIR, 'chromium')
-
-  p = argparse.ArgumentParser()
-  p.add_argument('--target-revision', required=True,
-                 help='The target chromium git revision [REQUIRED]')
-  p.add_argument('--chromium-dir', default=CR_DIR,
-                 help=('The path to the chromium directory to sync '
-                       '(default: %(default)r)'))
-  opts = p.parse_args()
-  opts.chromium_dir = os.path.abspath(opts.chromium_dir)
-
-  target_os_list = get_target_os_list()
-
-  # Do a quick check to see if we were successful last time to make runhooks
-  # sooper fast.
-  flag_file = os.path.join(opts.chromium_dir, '.last_sync_chromium')
-  flag_file_content = '\n'.join([
-    str(SCRIPT_VERSION),
-    opts.target_revision,
-    repr(target_os_list),
-  ])
-  if (os.path.exists(os.path.join(opts.chromium_dir, 'src')) and
-      os.path.exists(flag_file)):
-    with open(flag_file, 'r') as f:
-      if f.read() == flag_file_content:
-        print 'Chromium already up to date: ', opts.target_revision
-        return 0
-    os.unlink(flag_file)
-
-  # Workaround to avoid sync failure due move in
-  # https://codereview.chromium.org/1155743013
-  # TODO(kjellander): Remove this after the summer of 2015.
-  freetype_src = os.path.join(CR_DIR, 'src', 'third_party', 'freetype-android',
-                              'src')
-  if os.path.isdir(freetype_src):
-    shutil.rmtree(freetype_src)
-
-  # Avoid downloading NaCl toolchain as part of the Chromium hooks.
-  gclient_cmd = 'gclient.bat' if sys.platform.startswith('win') else 'gclient'
-  args = [
-      gclient_cmd, 'sync', '--force', '--nohooks', '--revision',
-      'src@' + opts.target_revision
-  ]
-
-  if os.environ.get('CHROME_HEADLESS') == '1':
-    # Running on a buildbot.
-    args.append('-vvv')
-
-    if sys.platform.startswith('win'):
-      cache_path = os.path.join(os.path.splitdrive(ROOT_DIR)[0] + os.path.sep,
-                                'b', 'git-cache')
-    else:
-      cache_path = '/b/git-cache'
-  else:
-    # Verbose, but not as verbose as on the buildbots.
-    args.append('-v')
-
-    # Support developers setting the cache_dir in .gclient.
-    cache_path = get_cache_dir()
-
-  # Allow for users with poor internet connections to download a Git clone
-  # without history (saves several gigs but is generally slower and doesn't work
-  # with the Git cache).
-  if os.environ.get(CHROMIUM_NO_HISTORY) == '1':
-    if cache_path:
-      print >> sys.stderr, (
-          'You cannot use "no-history" mode for syncing Chrome (i.e. set the '
-          '%s environment variable to 1) when you have cache_dir configured in '
-          'your .gclient.' % CHROMIUM_NO_HISTORY)
-      return 1
-    args.append('--no-history')
-    gclient_entries_file = os.path.join(opts.chromium_dir, '.gclient_entries')
-  else:
-    # Write a temporary .gclient file that has the cache_dir variable added.
-    gclientfile = os.path.join(opts.chromium_dir, '.gclient')
-    with open(gclientfile, 'rb') as spec:
-      spec = spec.read().splitlines()
-      spec[-1] = 'cache_dir = %r' % (cache_path,)
-    with open(gclientfile + '.tmp', 'wb') as f:
-      f.write('\n'.join(spec))
-
-    args += [
-      '--gclientfile', '.gclient.tmp',
-      '--delete_unversioned_trees', '--reset', '--upstream'
-    ]
-    gclient_entries_file = os.path.join(opts.chromium_dir,
-                                        '.gclient.tmp_entries')
-
-  # To avoid gclient sync problems when DEPS entries have been removed we must
-  # wipe the gclient's entries file that contains cached URLs for all DEPS.
-  if os.path.exists(gclient_entries_file):
-    os.unlink(gclient_entries_file)
-
-  if target_os_list:
-    args += ['--deps=' + target_os_list]
-
-  print textwrap.dedent("""\
-  +---------------------------------------------------------------------+
-  | NOTICE: This sync of Chromium will take a long time as several      |
-  |         gigabytes of data are downloaded. If this is your initial   |
-  |         sync and it's interrupted, try running 'gclient sync' again.|
-  |         If that fails, wipe everything clean and start over again.  |
-  +---------------------------------------------------------------------+""")
-  print 'Running "%s" in %s' % (' '.join(args), opts.chromium_dir)
-  ret = subprocess.call(args, cwd=opts.chromium_dir)
-  if ret == 0:
-    with open(flag_file, 'wb') as f:
-      f.write(flag_file_content)
-
-  return ret
-
-
-if __name__ == '__main__':
-  sys.exit(main())