mirror of
https://github.com/mozilla/gecko-dev.git
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429 lines
15 KiB
Python
429 lines
15 KiB
Python
# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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# This script is used to capture the content of config.status-generated
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# files and subsequently restore their timestamp if they haven't changed.
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import argparse
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import errno
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import itertools
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import os
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import re
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import subprocess
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import sys
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import pickle
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import mozpack.path as mozpath
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class File(object):
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def __init__(self, path):
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self._path = path
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self._content = open(path, 'rb').read()
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stat = os.stat(path)
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self._times = (stat.st_atime, stat.st_mtime)
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@property
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def path(self):
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return self._path
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@property
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def mtime(self):
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return self._times[1]
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@property
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def modified(self):
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'''Returns whether the file was modified since the instance was
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created. Result is memoized.'''
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if hasattr(self, '_modified'):
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return self._modified
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modified = True
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if os.path.exists(self._path):
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if open(self._path, 'rb').read() == self._content:
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modified = False
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self._modified = modified
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return modified
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def update_time(self):
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'''If the file hasn't changed since the instance was created,
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restore its old modification time.'''
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if not self.modified:
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os.utime(self._path, self._times)
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# As defined in the various sub-configures in the tree
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PRECIOUS_VARS = set([
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'build_alias',
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'host_alias',
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'target_alias',
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'CC',
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'CFLAGS',
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'LDFLAGS',
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'LIBS',
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'CPPFLAGS',
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'CPP',
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'CCC',
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'CXXFLAGS',
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'CXX',
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'CCASFLAGS',
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'CCAS',
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])
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CONFIGURE_DATA = 'configure.pkl'
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# Autoconf, in some of the sub-configures used in the tree, likes to error
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# out when "precious" variables change in value. The solution it gives to
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# straighten things is to either run make distclean or remove config.cache.
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# There's no reason not to do the latter automatically instead of failing,
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# doing the cleanup (which, on buildbots means a full clobber), and
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# restarting from scratch.
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def maybe_clear_cache(data):
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env = dict(data['env'])
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for kind in ('target', 'host', 'build'):
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arg = data[kind]
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if arg is not None:
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env['%s_alias' % kind] = arg
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# configure can take variables assignments in its arguments, and that
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# overrides whatever is in the environment.
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for arg in data['args']:
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if arg[:1] != '-' and '=' in arg:
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key, value = arg.split('=', 1)
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env[key] = value
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comment = re.compile(r'^\s+#')
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cache = {}
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with open(data['cache-file']) as f:
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for line in f:
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if not comment.match(line) and '=' in line:
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key, value = line.rstrip(os.linesep).split('=', 1)
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# If the value is quoted, unquote it
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if value[:1] == "'":
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value = value[1:-1].replace("'\\''", "'")
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cache[key] = value
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for precious in PRECIOUS_VARS:
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# If there is no entry at all for that precious variable, then
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# its value is not precious for that particular configure.
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if 'ac_cv_env_%s_set' % precious not in cache:
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continue
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is_set = cache.get('ac_cv_env_%s_set' % precious) == 'set'
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value = cache.get('ac_cv_env_%s_value' % precious) if is_set else None
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if value != env.get(precious):
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print 'Removing %s because of %s value change from:' \
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% (data['cache-file'], precious)
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print ' %s' % (value if value is not None else 'undefined')
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print 'to:'
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print ' %s' % env.get(precious, 'undefined')
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os.remove(data['cache-file'])
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return True
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return False
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def split_template(s):
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"""Given a "file:template" string, returns "file", "template". If the string
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is of the form "file" (without a template), returns "file", "file.in"."""
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if ':' in s:
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return s.split(':', 1)
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return s, '%s.in' % s
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def get_config_files(data):
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# config.status in js/src never contains the output we try to scan here.
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if data['relobjdir'] == 'js/src':
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return [], []
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config_status = mozpath.join(data['objdir'], 'config.status')
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if not os.path.exists(config_status):
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return [], []
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configure = mozpath.join(data['srcdir'], 'configure')
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config_files = []
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command_files = []
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# Scan the config.status output for information about configuration files
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# it generates.
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config_status_output = subprocess.check_output(
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[data['shell'], '-c', '%s --help' % config_status],
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stderr=subprocess.STDOUT).splitlines()
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state = None
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for line in config_status_output:
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if line.startswith('Configuration') and line.endswith(':'):
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if line.endswith('commands:'):
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state = 'commands'
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else:
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state = 'config'
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elif not line.strip():
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state = None
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elif state:
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for f, t in (split_template(couple) for couple in line.split()):
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f = mozpath.join(data['objdir'], f)
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t = mozpath.join(data['srcdir'], t)
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if state == 'commands':
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command_files.append(f)
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else:
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config_files.append((f, t))
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return config_files, command_files
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def prepare(srcdir, objdir, shell, args):
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parser = argparse.ArgumentParser()
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parser.add_argument('--target', type=str)
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parser.add_argument('--host', type=str)
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parser.add_argument('--build', type=str)
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parser.add_argument('--cache-file', type=str)
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# The --srcdir argument is simply ignored. It's a useless autoconf feature
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# that we don't support well anyways. This makes it stripped from `others`
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# and allows to skip setting it when calling the subconfigure (configure
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# will take it from the configure path anyways).
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parser.add_argument('--srcdir', type=str)
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data_file = os.path.join(objdir, CONFIGURE_DATA)
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previous_args = None
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if os.path.exists(data_file):
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with open(data_file, 'rb') as f:
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data = pickle.load(f)
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previous_args = data['args']
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# Msys likes to break environment variables and command line arguments,
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# so read those from stdin, as they are passed from the configure script
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# when necessary (on windows).
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input = sys.stdin.read()
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if input:
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data = {a: b for [a, b] in eval(input)}
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environ = {a: b for a, b in data['env']}
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# These environment variables as passed from old-configure may contain
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# posix-style paths, which will not be meaningful to the js
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# subconfigure, which runs as a native python process, so use their
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# values from the environment. In the case of autoconf implemented
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# subconfigures, Msys will re-convert them properly.
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for var in ('HOME', 'TERM', 'PATH', 'TMPDIR', 'TMP',
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'TEMP', 'INCLUDE'):
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if var in environ and var in os.environ:
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environ[var] = os.environ[var]
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args = data['args']
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else:
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environ = os.environ
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args, others = parser.parse_known_args(args)
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data = {
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'target': args.target,
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'host': args.host,
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'build': args.build,
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'args': others,
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'shell': shell,
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'srcdir': srcdir,
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'env': environ,
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}
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if args.cache_file:
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data['cache-file'] = mozpath.normpath(mozpath.join(os.getcwd(),
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args.cache_file))
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else:
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data['cache-file'] = mozpath.join(objdir, 'config.cache')
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if previous_args is not None:
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data['previous-args'] = previous_args
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try:
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os.makedirs(objdir)
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except OSError as e:
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if e.errno != errno.EEXIST:
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raise
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with open(data_file, 'wb') as f:
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pickle.dump(data, f)
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def prefix_lines(text, prefix):
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return ''.join('%s> %s' % (prefix, line) for line in text.splitlines(True))
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def execute_and_prefix(*args, **kwargs):
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prefix = kwargs['prefix']
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del kwargs['prefix']
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proc = subprocess.Popen(*args, stdout=subprocess.PIPE,
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stderr=subprocess.STDOUT, **kwargs)
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while True:
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line = proc.stdout.readline()
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if not line:
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break
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print prefix_lines(line.rstrip(), prefix)
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sys.stdout.flush()
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return proc.wait()
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def run(objdir):
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ret = 0
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with open(os.path.join(objdir, CONFIGURE_DATA), 'rb') as f:
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data = pickle.load(f)
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data['objdir'] = objdir
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relobjdir = data['relobjdir'] = os.path.relpath(objdir, os.getcwd())
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cache_file = data['cache-file']
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cleared_cache = True
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if os.path.exists(cache_file):
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cleared_cache = maybe_clear_cache(data)
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config_files, command_files = get_config_files(data)
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contents = []
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for f, t in config_files:
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contents.append(File(f))
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# AC_CONFIG_COMMANDS actually only registers tags, not file names
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# but most commands are tagged with the file name they create.
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# However, a few don't, or are tagged with a directory name (and their
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# command is just to create that directory)
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for f in command_files:
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if os.path.isfile(f):
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contents.append(File(f))
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# Only run configure if one of the following is true:
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# - config.status doesn't exist
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# - config.status is older than configure
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# - the configure arguments changed
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# - the environment changed in a way that requires a cache clear.
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configure = mozpath.join(data['srcdir'], 'configure')
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config_status_path = mozpath.join(objdir, 'config.status')
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skip_configure = True
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if not os.path.exists(config_status_path):
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skip_configure = False
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config_status = None
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else:
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config_status = File(config_status_path)
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if config_status.mtime < os.path.getmtime(configure) or \
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data.get('previous-args', data['args']) != data['args'] or \
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cleared_cache:
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skip_configure = False
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if not skip_configure:
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if mozpath.normsep(relobjdir) == 'js/src':
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# Because configure is a shell script calling a python script
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# calling a shell script, on Windows, with msys screwing the
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# environment, we lose the benefits from our own efforts in this
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# script to get past the msys problems. So manually call the python
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# script instead, so that we don't do a native->msys transition
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# here. Then the python configure will still have the right
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# environment when calling the shell configure.
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command = [
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sys.executable,
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os.path.join(os.path.dirname(__file__), '..', 'configure.py'),
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'--enable-project=js',
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]
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data['env']['OLD_CONFIGURE'] = os.path.join(
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os.path.dirname(configure), 'old-configure')
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else:
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command = [data['shell'], configure]
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for kind in ('target', 'build', 'host'):
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if data.get(kind) is not None:
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command += ['--%s=%s' % (kind, data[kind])]
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command += data['args']
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command += ['--cache-file=%s' % cache_file]
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# Pass --no-create to configure so that it doesn't run config.status.
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# We're going to run it ourselves.
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command += ['--no-create']
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print prefix_lines('configuring', relobjdir)
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print prefix_lines('running %s' % ' '.join(command[:-1]), relobjdir)
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sys.stdout.flush()
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returncode = execute_and_prefix(command, cwd=objdir, env=data['env'],
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prefix=relobjdir)
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if returncode:
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return returncode
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# Leave config.status with a new timestamp if configure is newer than
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# its original mtime.
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if config_status and os.path.getmtime(configure) <= config_status.mtime:
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config_status.update_time()
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# Only run config.status if one of the following is true:
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# - config.status changed or did not exist
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# - one of the templates for config files is newer than the corresponding
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# config file.
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skip_config_status = True
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if mozpath.normsep(relobjdir) == 'js/src':
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# Running config.status in js/src actually does nothing, so we just
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# skip it.
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pass
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elif not config_status or config_status.modified:
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# If config.status doesn't exist after configure (because it's not
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# an autoconf configure), skip it.
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if os.path.exists(config_status_path):
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skip_config_status = False
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else:
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# config.status changed or was created, so we need to update the
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# list of config and command files.
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config_files, command_files = get_config_files(data)
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for f, t in config_files:
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if not os.path.exists(t) or \
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os.path.getmtime(f) < os.path.getmtime(t):
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skip_config_status = False
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if not skip_config_status:
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if skip_configure:
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print prefix_lines('running config.status', relobjdir)
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sys.stdout.flush()
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ret = execute_and_prefix([data['shell'], '-c', './config.status'],
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cwd=objdir, env=data['env'], prefix=relobjdir)
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for f in contents:
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f.update_time()
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return ret
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def subconfigure(args):
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parser = argparse.ArgumentParser()
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parser.add_argument('--list', type=str,
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help='File containing a list of subconfigures to run')
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parser.add_argument('--skip', type=str,
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help='File containing a list of Subconfigures to skip')
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parser.add_argument('subconfigures', type=str, nargs='*',
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help='Subconfigures to run if no list file is given')
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args, others = parser.parse_known_args(args)
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subconfigures = args.subconfigures
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if args.list:
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subconfigures.extend(open(args.list, 'rb').read().splitlines())
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if args.skip:
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skips = set(open(args.skip, 'rb').read().splitlines())
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subconfigures = [s for s in subconfigures if s not in skips]
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if not subconfigures:
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return 0
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ret = 0
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for subconfigure in subconfigures:
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returncode = run(subconfigure)
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ret = max(returncode, ret)
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if ret:
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break
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return ret
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def main(args):
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if args[0] != '--prepare':
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return subconfigure(args)
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topsrcdir = os.path.abspath(args[1])
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subdir = args[2]
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# subdir can be of the form srcdir:objdir
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if ':' in subdir:
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srcdir, subdir = subdir.split(':', 1)
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else:
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srcdir = subdir
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srcdir = os.path.join(topsrcdir, srcdir)
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objdir = os.path.abspath(subdir)
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return prepare(srcdir, objdir, args[3], args[4:])
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if __name__ == '__main__':
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sys.exit(main(sys.argv[1:]))
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