The Tor Browser: build/subconfigure.py@129ffea94266 (annotated)

build/subconfigure.py@129ffea94266 (annotated)

build/subconfigure.py

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 # This script is used to capture the content of config.status-generated
 # files and subsequently restore their timestamp if they haven't changed.
 import os
 import re
 import subprocess
 import sys
 import pickle
 class File(object):
     def __init__(self, path):
         self._path = path
         self._content = open(path, 'rb').read()
         stat = os.stat(path)
         self._times = (stat.st_atime, stat.st_mtime)
     @property
     def path(self):
         return self._path
     @property
     def mtime(self):
         return self._times[1]
     def update_time(self):
         '''If the file hasn't changed since the instance was created,
            restore its old modification time.'''
         if not os.path.exists(self._path):
             return
         if open(self._path, 'rb').read() == self._content:
             os.utime(self._path, self._times)
 # As defined in the various sub-configures in the tree
 PRECIOUS_VARS = set([
     'build_alias',
     'host_alias',
     'target_alias',
     'CC',
     'CFLAGS',
     'LDFLAGS',
     'LIBS',
     'CPPFLAGS',
     'CPP',
     'CCC',
     'CXXFLAGS',
     'CXX',
     'CCASFLAGS',
     'CCAS',
 ])
 # Autoconf, in some of the sub-configures used in the tree, likes to error
 # out when "precious" variables change in value. The solution it gives to
 # straighten things is to either run make distclean or remove config.cache.
 # There's no reason not to do the latter automatically instead of failing,
 # doing the cleanup (which, on buildbots means a full clobber), and
 # restarting from scratch.
 def maybe_clear_cache():
     comment = re.compile(r'^\s+#')
     cache = {}
     with open('config.cache') as f:
         for line in f.readlines():
             if not comment.match(line) and '=' in line:
                 key, value = line.split('=', 1)
                 cache[key] = value
     for precious in PRECIOUS_VARS:
         entry = 'ac_cv_env_%s_value' % precious
         if entry in cache and (not precious in os.environ or os.environ[precious] != cache[entry]):
             os.remove('config.cache')
             return
 def dump(dump_file, shell):
     if os.path.exists('config.cache'):
         maybe_clear_cache()
     if not os.path.exists('config.status'):
         if os.path.exists(dump_file):
             os.remove(dump_file)
         return
     config_files = [File('config.status')]
     # Scan the config.status output for information about configuration files
     # it generates.
     config_status_output = subprocess.check_output(
         [shell, '-c', './config.status --help'],
         stderr=subprocess.STDOUT).splitlines()
     state = None
     for line in config_status_output:
         if line.startswith('Configuration') and line.endswith(':'):
             state = 'config'
         elif not line.startswith(' '):
             state = None
         elif state == 'config':
             for f in (couple.split(':')[0] for couple in line.split()):
                 if os.path.isfile(f):
                     config_files.append(File(f))
     with open(dump_file, 'wb') as f:
         pickle.dump(config_files, f)
 def adjust(dump_file, configure):
     if not os.path.exists(dump_file):
         return
     config_files = []
     try:
         with open(dump_file, 'rb') as f:
             config_files = pickle.load(f)
     except Exception:
         pass
     for f in config_files:
         # Still touch config.status if configure is newer than its original
         # mtime.
         if configure and os.path.basename(f.path) == 'config.status' and \
                 os.path.getmtime(configure) > f.mtime:
             continue
         f.update_time()
     os.remove(dump_file)
 CONFIG_DUMP = 'config_files.pkl'
 if __name__ == '__main__':
     if sys.argv[1] == 'dump':
         dump(CONFIG_DUMP, sys.argv[2])
     elif sys.argv[1] == 'adjust':
         adjust(CONFIG_DUMP, sys.argv[2] if len(sys.argv) > 2 else None)

The Tor Browser / annotate

build/subconfigure.py@129ffea94266 (annotated)

build/subconfigure.py