configure.py
author violet <violet.bugreport@gmail.com>
Thu, 16 May 2019 13:21:21 +0000
changeset 474705 94c0cc0049815467d23d4a778b68438607dc0c98
parent 474166 ee4b88439111cf03944808dc170dbefa74fbdab0
child 475874 198001a673f6ae43eb5edfea4f3a095c1ee5682b
permissions -rw-r--r--
Bug 1383650 - Optimize attribute mapping by not parsing same thing twice r=longsonr Geometry properties are the most used SVG attributes. When authors specify them as attributes, we have to parse them in SVG side. So we don't want to parse them in CSS side again, otherwise the introduced performance loss is relatively high. With this optimization, this feature implementation doesn't slow down overall performace even if there are thousands of geometry elements. Differential Revision: https://phabricator.services.mozilla.com/D30778

# 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/.

from __future__ import print_function, unicode_literals

import codecs
import itertools
import logging
import os
import sys
import textwrap


base_dir = os.path.abspath(os.path.dirname(__file__))
sys.path.insert(0, os.path.join(base_dir, 'python', 'mozbuild'))
from mozbuild.configure import (
    ConfigureSandbox,
    TRACE,
)
from mozbuild.pythonutil import iter_modules_in_path
from mozbuild.backend.configenvironment import PartialConfigEnvironment
from mozbuild.util import (
    indented_repr,
    encode,
)
import mozpack.path as mozpath


def main(argv):
    config = {}

    sandbox = ConfigureSandbox(config, os.environ, argv)

    if os.environ.get('MOZ_CONFIGURE_TRACE'):
        sandbox._logger.setLevel(TRACE)

    sandbox.run(os.path.join(os.path.dirname(__file__), 'moz.configure'))

    if sandbox._help:
        return 0

    return config_status(config)


def config_status(config):
    # Sanitize config data to feed config.status
    # Ideally, all the backend and frontend code would handle the booleans, but
    # there are so many things involved, that it's easier to keep config.status
    # untouched for now.
    def sanitized_bools(v):
        if v is True:
            return '1'
        if v is False:
            return ''
        return v

    sanitized_config = {}
    sanitized_config['substs'] = {
        k: sanitized_bools(v) for k, v in config.iteritems()
        if k not in ('DEFINES', 'non_global_defines', 'TOPSRCDIR', 'TOPOBJDIR',
                     'CONFIG_STATUS_DEPS')
    }
    sanitized_config['defines'] = {
        k: sanitized_bools(v) for k, v in config['DEFINES'].iteritems()
    }
    sanitized_config['non_global_defines'] = config['non_global_defines']
    sanitized_config['topsrcdir'] = config['TOPSRCDIR']
    sanitized_config['topobjdir'] = config['TOPOBJDIR']
    sanitized_config['mozconfig'] = config.get('MOZCONFIG')

    # Create config.status. Eventually, we'll want to just do the work it does
    # here, when we're able to skip configure tests/use cached results/not rely
    # on autoconf.
    logging.getLogger('moz.configure').info('Creating config.status')
    encoding = 'mbcs' if sys.platform == 'win32' else 'utf-8'
    with codecs.open('config.status', 'w', encoding) as fh:
        fh.write(textwrap.dedent('''\
            #!%(python)s
            # coding=%(encoding)s
            from __future__ import unicode_literals
            from mozbuild.util import encode
            encoding = '%(encoding)s'
        ''') % {'python': config['PYTHON'], 'encoding': encoding})
        # A lot of the build backend code is currently expecting byte
        # strings and breaks in subtle ways with unicode strings. (bug 1296508)
        for k, v in sanitized_config.iteritems():
            fh.write('%s = encode(%s, encoding)\n' % (k, indented_repr(v)))
        fh.write("__all__ = ['topobjdir', 'topsrcdir', 'defines', "
                 "'non_global_defines', 'substs', 'mozconfig']")

        if config.get('MOZ_BUILD_APP') != 'js' or config.get('JS_STANDALONE'):
            fh.write(textwrap.dedent('''
                if __name__ == '__main__':
                    from mozbuild.util import patch_main
                    patch_main()
                    from mozbuild.config_status import config_status
                    args = dict([(name, globals()[name]) for name in __all__])
                    config_status(**args)
            '''))

    partial_config = PartialConfigEnvironment(config['TOPOBJDIR'])
    partial_config.write_vars(sanitized_config)

    # Write out a file so the build backend knows to re-run configure when
    # relevant Python changes.
    with open('config_status_deps.in', 'w') as fh:
        for f in itertools.chain(config['CONFIG_STATUS_DEPS'],
                                 iter_modules_in_path(config['TOPOBJDIR'],
                                                      config['TOPSRCDIR'])):
            fh.write('%s\n' % mozpath.normpath(f))

    # Other things than us are going to run this file, so we need to give it
    # executable permissions.
    os.chmod('config.status', 0o755)
    if config.get('MOZ_BUILD_APP') != 'js' or config.get('JS_STANDALONE'):
        from mozbuild.config_status import config_status

        # Some values in sanitized_config also have more complex types, such as
        # EnumString, which using when calling config_status would currently
        # break the build, as well as making it inconsistent with re-running
        # config.status. Fortunately, EnumString derives from unicode, so it's
        # covered by converting unicode strings.

        # A lot of the build backend code is currently expecting byte strings
        # and breaks in subtle ways with unicode strings.
        return config_status(args=[], **encode(sanitized_config, encoding))
    return 0


if __name__ == '__main__':
    sys.exit(main(sys.argv))