mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-25 22:01:30 +00:00
125 lines
3.6 KiB
Python
125 lines
3.6 KiB
Python
# 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)
|
|
|
|
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):
|
|
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:
|
|
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)
|