diff options
Diffstat (limited to 'build/subconfigure.py')
| -rw-r--r-- | build/subconfigure.py | 441 |
1 files changed, 441 insertions, 0 deletions
diff --git a/build/subconfigure.py b/build/subconfigure.py new file mode 100644 index 000000000..6c152f406 --- /dev/null +++ b/build/subconfigure.py @@ -0,0 +1,441 @@ +# 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 argparse +import errno +import itertools +import os +import re +import subprocess +import sys +import pickle + +import mozpack.path as mozpath + + +class Pool(object): + def __new__(cls, size): + try: + import multiprocessing + size = min(size, multiprocessing.cpu_count()) + return multiprocessing.Pool(size) + except: + return super(Pool, cls).__new__(cls) + + def imap_unordered(self, fn, iterable): + return itertools.imap(fn, iterable) + + def close(self): + pass + + def join(self): + pass + + +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] + + @property + def modified(self): + '''Returns whether the file was modified since the instance was + created. Result is memoized.''' + if hasattr(self, '_modified'): + return self._modified + + modified = True + if os.path.exists(self._path): + if open(self._path, 'rb').read() == self._content: + modified = False + self._modified = modified + return modified + + def update_time(self): + '''If the file hasn't changed since the instance was created, + restore its old modification time.''' + if not self.modified: + 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', +]) + + +CONFIGURE_DATA = 'configure.pkl' + + +# 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(data): + env = dict(data['env']) + for kind in ('target', 'host', 'build'): + arg = data[kind] + if arg is not None: + env['%s_alias' % kind] = arg + # configure can take variables assignments in its arguments, and that + # overrides whatever is in the environment. + for arg in data['args']: + if arg[:1] != '-' and '=' in arg: + key, value = arg.split('=', 1) + env[key] = value + + comment = re.compile(r'^\s+#') + cache = {} + with open(data['cache-file']) as f: + for line in f: + if not comment.match(line) and '=' in line: + key, value = line.rstrip(os.linesep).split('=', 1) + # If the value is quoted, unquote it + if value[:1] == "'": + value = value[1:-1].replace("'\\''", "'") + cache[key] = value + for precious in PRECIOUS_VARS: + # If there is no entry at all for that precious variable, then + # its value is not precious for that particular configure. + if 'ac_cv_env_%s_set' % precious not in cache: + continue + is_set = cache.get('ac_cv_env_%s_set' % precious) == 'set' + value = cache.get('ac_cv_env_%s_value' % precious) if is_set else None + if value != env.get(precious): + print 'Removing %s because of %s value change from:' \ + % (data['cache-file'], precious) + print ' %s' % (value if value is not None else 'undefined') + print 'to:' + print ' %s' % env.get(precious, 'undefined') + os.remove(data['cache-file']) + return True + return False + + +def split_template(s): + """Given a "file:template" string, returns "file", "template". If the string + is of the form "file" (without a template), returns "file", "file.in".""" + if ':' in s: + return s.split(':', 1) + return s, '%s.in' % s + + +def get_config_files(data): + config_status = mozpath.join(data['objdir'], 'config.status') + if not os.path.exists(config_status): + return [], [] + + configure = mozpath.join(data['srcdir'], 'configure') + config_files = [] + command_files = [] + + # Scan the config.status output for information about configuration files + # it generates. + config_status_output = subprocess.check_output( + [data['shell'], '-c', '%s --help' % config_status], + stderr=subprocess.STDOUT).splitlines() + state = None + for line in config_status_output: + if line.startswith('Configuration') and line.endswith(':'): + if line.endswith('commands:'): + state = 'commands' + else: + state = 'config' + elif not line.strip(): + state = None + elif state: + for f, t in (split_template(couple) for couple in line.split()): + f = mozpath.join(data['objdir'], f) + t = mozpath.join(data['srcdir'], t) + if state == 'commands': + command_files.append(f) + else: + config_files.append((f, t)) + + return config_files, command_files + + +def prepare(srcdir, objdir, shell, args): + parser = argparse.ArgumentParser() + parser.add_argument('--target', type=str) + parser.add_argument('--host', type=str) + parser.add_argument('--build', type=str) + parser.add_argument('--cache-file', type=str) + # The --srcdir argument is simply ignored. It's a useless autoconf feature + # that we don't support well anyways. This makes it stripped from `others` + # and allows to skip setting it when calling the subconfigure (configure + # will take it from the configure path anyways). + parser.add_argument('--srcdir', type=str) + + data_file = os.path.join(objdir, CONFIGURE_DATA) + previous_args = None + if os.path.exists(data_file): + with open(data_file, 'rb') as f: + data = pickle.load(f) + previous_args = data['args'] + + # Msys likes to break environment variables and command line arguments, + # so read those from stdin, as they are passed from the configure script + # when necessary (on windows). + input = sys.stdin.read() + if input: + data = {a: b for [a, b] in eval(input)} + environ = {a: b for a, b in data['env']} + # These environment variables as passed from old-configure may contain + # posix-style paths, which will not be meaningful to the js + # subconfigure, which runs as a native python process, so use their + # values from the environment. In the case of autoconf implemented + # subconfigures, Msys will re-convert them properly. + for var in ('HOME', 'TERM', 'PATH', 'TMPDIR', 'TMP', + 'TEMP', 'INCLUDE'): + if var in environ and var in os.environ: + environ[var] = os.environ[var] + args = data['args'] + else: + environ = os.environ + + args, others = parser.parse_known_args(args) + + data = { + 'target': args.target, + 'host': args.host, + 'build': args.build, + 'args': others, + 'shell': shell, + 'srcdir': srcdir, + 'env': environ, + } + + if args.cache_file: + data['cache-file'] = mozpath.normpath(mozpath.join(os.getcwd(), + args.cache_file)) + else: + data['cache-file'] = mozpath.join(objdir, 'config.cache') + + if previous_args is not None: + data['previous-args'] = previous_args + + try: + os.makedirs(objdir) + except OSError as e: + if e.errno != errno.EEXIST: + raise + + with open(data_file, 'wb') as f: + pickle.dump(data, f) + + +def prefix_lines(text, prefix): + return ''.join('%s> %s' % (prefix, line) for line in text.splitlines(True)) + + +def run(objdir): + ret = 0 + output = '' + + with open(os.path.join(objdir, CONFIGURE_DATA), 'rb') as f: + data = pickle.load(f) + + data['objdir'] = objdir + + cache_file = data['cache-file'] + cleared_cache = True + if os.path.exists(cache_file): + cleared_cache = maybe_clear_cache(data) + + config_files, command_files = get_config_files(data) + contents = [] + for f, t in config_files: + contents.append(File(f)) + + # AC_CONFIG_COMMANDS actually only registers tags, not file names + # but most commands are tagged with the file name they create. + # However, a few don't, or are tagged with a directory name (and their + # command is just to create that directory) + for f in command_files: + if os.path.isfile(f): + contents.append(File(f)) + + # Only run configure if one of the following is true: + # - config.status doesn't exist + # - config.status is older than configure + # - the configure arguments changed + # - the environment changed in a way that requires a cache clear. + configure = mozpath.join(data['srcdir'], 'configure') + config_status_path = mozpath.join(objdir, 'config.status') + skip_configure = True + if not os.path.exists(config_status_path): + skip_configure = False + config_status = None + else: + config_status = File(config_status_path) + if config_status.mtime < os.path.getmtime(configure) or \ + data.get('previous-args', data['args']) != data['args'] or \ + cleared_cache: + skip_configure = False + + relobjdir = os.path.relpath(objdir, os.getcwd()) + + if not skip_configure: + if mozpath.normsep(relobjdir) == 'js/src': + # Because configure is a shell script calling a python script + # calling a shell script, on Windows, with msys screwing the + # environment, we lose the benefits from our own efforts in this + # script to get past the msys problems. So manually call the python + # script instead, so that we don't do a native->msys transition + # here. Then the python configure will still have the right + # environment when calling the shell configure. + command = [ + sys.executable, + os.path.join(os.path.dirname(__file__), '..', 'configure.py'), + '--enable-project=js', + ] + data['env']['OLD_CONFIGURE'] = os.path.join( + os.path.dirname(configure), 'old-configure') + else: + command = [data['shell'], configure] + for kind in ('target', 'build', 'host'): + if data.get(kind) is not None: + command += ['--%s=%s' % (kind, data[kind])] + command += data['args'] + command += ['--cache-file=%s' % cache_file] + + # Pass --no-create to configure so that it doesn't run config.status. + # We're going to run it ourselves. + command += ['--no-create'] + + print prefix_lines('configuring', relobjdir) + print prefix_lines('running %s' % ' '.join(command[:-1]), relobjdir) + sys.stdout.flush() + try: + output += subprocess.check_output(command, + stderr=subprocess.STDOUT, cwd=objdir, env=data['env']) + except subprocess.CalledProcessError as e: + return relobjdir, e.returncode, e.output + + # Leave config.status with a new timestamp if configure is newer than + # its original mtime. + if config_status and os.path.getmtime(configure) <= config_status.mtime: + config_status.update_time() + + # Only run config.status if one of the following is true: + # - config.status changed or did not exist + # - one of the templates for config files is newer than the corresponding + # config file. + skip_config_status = True + if not config_status or config_status.modified: + # If config.status doesn't exist after configure (because it's not + # an autoconf configure), skip it. + if os.path.exists(config_status_path): + skip_config_status = False + else: + # config.status changed or was created, so we need to update the + # list of config and command files. + config_files, command_files = get_config_files(data) + for f, t in config_files: + if not os.path.exists(t) or \ + os.path.getmtime(f) < os.path.getmtime(t): + skip_config_status = False + + if not skip_config_status: + if skip_configure: + print prefix_lines('running config.status', relobjdir) + sys.stdout.flush() + try: + output += subprocess.check_output([data['shell'], '-c', + './config.status'], stderr=subprocess.STDOUT, cwd=objdir, + env=data['env']) + except subprocess.CalledProcessError as e: + ret = e.returncode + output += e.output + + for f in contents: + f.update_time() + + return relobjdir, ret, output + + +def subconfigure(args): + parser = argparse.ArgumentParser() + parser.add_argument('--list', type=str, + help='File containing a list of subconfigures to run') + parser.add_argument('--skip', type=str, + help='File containing a list of Subconfigures to skip') + parser.add_argument('subconfigures', type=str, nargs='*', + help='Subconfigures to run if no list file is given') + args, others = parser.parse_known_args(args) + subconfigures = args.subconfigures + if args.list: + subconfigures.extend(open(args.list, 'rb').read().splitlines()) + if args.skip: + skips = set(open(args.skip, 'rb').read().splitlines()) + subconfigures = [s for s in subconfigures if s not in skips] + + if not subconfigures: + return 0 + + ret = 0 + # One would think using a ThreadPool would be faster, considering + # everything happens in subprocesses anyways, but no, it's actually + # slower on Windows. (20s difference overall!) + pool = Pool(len(subconfigures)) + for relobjdir, returncode, output in \ + pool.imap_unordered(run, subconfigures): + print prefix_lines(output, relobjdir) + sys.stdout.flush() + ret = max(returncode, ret) + if ret: + break + pool.close() + pool.join() + return ret + + +def main(args): + if args[0] != '--prepare': + return subconfigure(args) + + topsrcdir = os.path.abspath(args[1]) + subdir = args[2] + # subdir can be of the form srcdir:objdir + if ':' in subdir: + srcdir, subdir = subdir.split(':', 1) + else: + srcdir = subdir + srcdir = os.path.join(topsrcdir, srcdir) + objdir = os.path.abspath(subdir) + + return prepare(srcdir, objdir, args[3], args[4:]) + + +if __name__ == '__main__': + sys.exit(main(sys.argv[1:])) |