The Tor Browser / file comparison
comparison: build/subconfigure.py
build/subconfigure.py
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
equal
deleted
inserted
replaced
| -1:000000000000 | 0:b34c17be2b09 |
|---|---|
| 1 # This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 # License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 # file, You can obtain one at http://mozilla.org/MPL/2.0/. | |
| 4 | |
| 5 # This script is used to capture the content of config.status-generated | |
| 6 # files and subsequently restore their timestamp if they haven't changed. | |
| 7 | |
| 8 import os | |
| 9 import re | |
| 10 import subprocess | |
| 11 import sys | |
| 12 import pickle | |
| 13 | |
| 14 class File(object): | |
| 15 def __init__(self, path): | |
| 16 self._path = path | |
| 17 self._content = open(path, 'rb').read() | |
| 18 stat = os.stat(path) | |
| 19 self._times = (stat.st_atime, stat.st_mtime) | |
| 20 | |
| 21 @property | |
| 22 def path(self): | |
| 23 return self._path | |
| 24 | |
| 25 @property | |
| 26 def mtime(self): | |
| 27 return self._times[1] | |
| 28 | |
| 29 def update_time(self): | |
| 30 '''If the file hasn't changed since the instance was created, | |
| 31 restore its old modification time.''' | |
| 32 if not os.path.exists(self._path): | |
| 33 return | |
| 34 if open(self._path, 'rb').read() == self._content: | |
| 35 os.utime(self._path, self._times) | |
| 36 | |
| 37 | |
| 38 # As defined in the various sub-configures in the tree | |
| 39 PRECIOUS_VARS = set([ | |
| 40 'build_alias', | |
| 41 'host_alias', | |
| 42 'target_alias', | |
| 43 'CC', | |
| 44 'CFLAGS', | |
| 45 'LDFLAGS', | |
| 46 'LIBS', | |
| 47 'CPPFLAGS', | |
| 48 'CPP', | |
| 49 'CCC', | |
| 50 'CXXFLAGS', | |
| 51 'CXX', | |
| 52 'CCASFLAGS', | |
| 53 'CCAS', | |
| 54 ]) | |
| 55 | |
| 56 | |
| 57 # Autoconf, in some of the sub-configures used in the tree, likes to error | |
| 58 # out when "precious" variables change in value. The solution it gives to | |
| 59 # straighten things is to either run make distclean or remove config.cache. | |
| 60 # There's no reason not to do the latter automatically instead of failing, | |
| 61 # doing the cleanup (which, on buildbots means a full clobber), and | |
| 62 # restarting from scratch. | |
| 63 def maybe_clear_cache(): | |
| 64 comment = re.compile(r'^\s+#') | |
| 65 cache = {} | |
| 66 with open('config.cache') as f: | |
| 67 for line in f.readlines(): | |
| 68 if not comment.match(line) and '=' in line: | |
| 69 key, value = line.split('=', 1) | |
| 70 cache[key] = value | |
| 71 for precious in PRECIOUS_VARS: | |
| 72 entry = 'ac_cv_env_%s_value' % precious | |
| 73 if entry in cache and (not precious in os.environ or os.environ[precious] != cache[entry]): | |
| 74 os.remove('config.cache') | |
| 75 return | |
| 76 | |
| 77 | |
| 78 def dump(dump_file, shell): | |
| 79 if os.path.exists('config.cache'): | |
| 80 maybe_clear_cache() | |
| 81 if not os.path.exists('config.status'): | |
| 82 if os.path.exists(dump_file): | |
| 83 os.remove(dump_file) | |
| 84 return | |
| 85 | |
| 86 config_files = [File('config.status')] | |
| 87 | |
| 88 # Scan the config.status output for information about configuration files | |
| 89 # it generates. | |
| 90 config_status_output = subprocess.check_output( | |
| 91 [shell, '-c', './config.status --help'], | |
| 92 stderr=subprocess.STDOUT).splitlines() | |
| 93 state = None | |
| 94 for line in config_status_output: | |
| 95 if line.startswith('Configuration') and line.endswith(':'): | |
| 96 state = 'config' | |
| 97 elif not line.startswith(' '): | |
| 98 state = None | |
| 99 elif state == 'config': | |
| 100 for f in (couple.split(':')[0] for couple in line.split()): | |
| 101 if os.path.isfile(f): | |
| 102 config_files.append(File(f)) | |
| 103 | |
| 104 with open(dump_file, 'wb') as f: | |
| 105 pickle.dump(config_files, f) | |
| 106 | |
| 107 | |
| 108 def adjust(dump_file, configure): | |
| 109 if not os.path.exists(dump_file): | |
| 110 return | |
| 111 | |
| 112 config_files = [] | |
| 113 | |
| 114 try: | |
| 115 with open(dump_file, 'rb') as f: | |
| 116 config_files = pickle.load(f) | |
| 117 except Exception: | |
| 118 pass | |
| 119 | |
| 120 for f in config_files: | |
| 121 # Still touch config.status if configure is newer than its original | |
| 122 # mtime. | |
| 123 if configure and os.path.basename(f.path) == 'config.status' and \ | |
| 124 os.path.getmtime(configure) > f.mtime: | |
| 125 continue | |
| 126 f.update_time() | |
| 127 | |
| 128 os.remove(dump_file) | |
| 129 | |
| 130 | |
| 131 CONFIG_DUMP = 'config_files.pkl' | |
| 132 | |
| 133 if __name__ == '__main__': | |
| 134 if sys.argv[1] == 'dump': | |
| 135 dump(CONFIG_DUMP, sys.argv[2]) | |
| 136 elif sys.argv[1] == 'adjust': | |
| 137 adjust(CONFIG_DUMP, sys.argv[2] if len(sys.argv) > 2 else None) |
