gecko-dev/build/ConfigStatus.py
Gregory Szorc 725466ff53 Bug 902619 - Write mozinfo.json as part of config.status; r=ted
There are both mechanical and logical changes in this patch.

The mechanical changes involve moving some files into the mozbuild
package.

The logical changes include move writing of mozinfo.json into
config.status (from configure.in). There were some variable assignments
being performed in configure.in. These variables were read from
writemozinfo.py. However, these variables don't appear to be necessary!
Now that mozinfo has full access to the underlying config.status data
structure, it can now access these variables directly. I verified that
every variable being assigned in configure.in had a corresponding
AC_SUBST earlier in the file.

The only variable that's a bit weird is the TOPSRCDIR and MOZCONFIG
environment variables. mozinfo continues to look in the environment for
MOZCONFIG. However TOPSRCDIR is now coming from config.status.

As part of moving the code, I also modernized the test file, cleaned up
some style, and removed some unused imports.

--HG--
rename : config/writemozinfo.py => python/mozbuild/mozbuild/mozinfo.py
rename : config/tests/unit-writemozinfo.py => python/mozbuild/mozbuild/test/test_mozinfo.py
2013-08-07 23:48:41 -07:00

138 lines
5.9 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/.
# Combined with build/autoconf/config.status.m4, ConfigStatus is an almost
# drop-in replacement for autoconf 2.13's config.status, with features
# borrowed from autoconf > 2.5, and additional features.
from __future__ import print_function
import logging
import os
import sys
from optparse import OptionParser
from mach.logging import LoggingManager
from mozbuild.backend.configenvironment import ConfigEnvironment
from mozbuild.backend.recursivemake import RecursiveMakeBackend
from mozbuild.frontend.emitter import TreeMetadataEmitter
from mozbuild.frontend.reader import BuildReader
from mozbuild.mozinfo import write_mozinfo
log_manager = LoggingManager()
def config_status(topobjdir = '.', topsrcdir = '.',
defines = [], non_global_defines = [], substs = [],
files = [], headers = []):
'''Main function, providing config.status functionality.
Contrary to config.status, it doesn't use CONFIG_FILES or CONFIG_HEADERS
variables, but like config.status from autoconf 2.6, single files may be
generated with the --file and --header options. Several such options can
be given to generate several files at the same time.
Without the -n option, this program acts as config.status and considers
the current directory as the top object directory, even when config.status
is in a different directory. It will, however, treat the directory
containing config.status as the top object directory with the -n option,
while files given to the --file and --header arguments are considered
relative to the current directory.
The --recheck option, like with the original config.status, runs configure
again, with the options given in the "ac_configure_args" subst.
The options to this function are passed when creating the
ConfigEnvironment, except for files and headers, which contain the list
of files and headers to be generated by default. These lists, as well as
the actual wrapper script around this function, are meant to be generated
by configure. See build/autoconf/config.status.m4.
Unlike config.status behaviour with CONFIG_FILES and CONFIG_HEADERS,
but like config.status behaviour with --file and --header, providing
files or headers on the command line inhibits the default generation of
files when given headers and headers when given files.
Unlike config.status, the FILE:TEMPLATE syntax is not supported for
files and headers. The template is always the filename suffixed with
'.in', in the corresponding directory under the top source directory.
'''
if 'CONFIG_FILES' in os.environ:
raise Exception, 'Using the CONFIG_FILES environment variable is not supported. Use --file instead.'
if 'CONFIG_HEADERS' in os.environ:
raise Exception, 'Using the CONFIG_HEADERS environment variable is not supported. Use --header instead.'
parser = OptionParser()
parser.add_option('--recheck', dest='recheck', action='store_true',
help='update config.status by reconfiguring in the same conditions')
parser.add_option('--file', dest='files', metavar='FILE', action='append',
help='instantiate the configuration file FILE')
parser.add_option('--header', dest='headers', metavar='FILE', action='append',
help='instantiate the configuration header FILE')
parser.add_option('-v', '--verbose', dest='verbose', action='store_true',
help='display verbose output')
parser.add_option('-n', dest='not_topobjdir', action='store_true',
help='do not consider current directory as top object directory')
(options, args) = parser.parse_args()
# Without -n, the current directory is meant to be the top object directory
if not options.not_topobjdir:
topobjdir = os.path.abspath('.')
env = ConfigEnvironment(topsrcdir, topobjdir, defines=defines,
non_global_defines=non_global_defines, substs=substs)
# mozinfo.json only needs written if configure changes and configure always
# passes this environment variable.
if 'WRITE_MOZINFO' in os.environ:
write_mozinfo(os.path.join(topobjdir, 'mozinfo.json'), env, os.environ)
reader = BuildReader(env)
emitter = TreeMetadataEmitter(env)
backend = RecursiveMakeBackend(env)
# This won't actually do anything because of the magic of generators.
definitions = emitter.emit(reader.read_topsrcdir())
if options.recheck:
# Execute configure from the top object directory
if not os.path.isabs(topsrcdir):
topsrcdir = relpath(topsrcdir, topobjdir)
os.chdir(topobjdir)
os.execlp('sh', 'sh', '-c', ' '.join([os.path.join(topsrcdir, 'configure'), env.substs['ac_configure_args'], '--no-create', '--no-recursion']))
if options.files:
files = options.files
headers = []
if options.headers:
headers = options.headers
if not options.files:
files = []
# Default to display messages when giving --file or --headers on the
# command line.
log_level = logging.INFO
if options.files or options.headers or options.verbose:
log_level = logging.DEBUG
log_manager.add_terminal_logging(level=log_level)
log_manager.enable_unstructured()
if not options.files and not options.headers:
print('Reticulating splines...', file=sys.stderr)
summary = backend.consume(definitions)
for line in summary.summaries():
print(line, file=sys.stderr)
files = [os.path.join(topobjdir, f) for f in files]
headers = [os.path.join(topobjdir, f) for f in headers]
for file in files:
env.create_config_file(file)
for header in headers:
env.create_config_header(header)