The Meson Build System
http://mesonbuild.com/
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366 lines
15 KiB
366 lines
15 KiB
# Copyright 2012-2016 The Meson development team |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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import sys, stat, traceback, argparse |
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import datetime |
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import os.path |
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import platform |
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import cProfile as profile |
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from . import environment, interpreter, mesonlib |
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from . import build |
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from . import mlog, coredata |
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from .mesonlib import MesonException |
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from .environment import detect_msys2_arch |
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from .wrap import WrapMode |
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default_warning = '1' |
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def create_parser(): |
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p = argparse.ArgumentParser(prog='meson') |
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coredata.register_builtin_arguments(p) |
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p.add_argument('--cross-file', default=None, |
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help='File describing cross compilation environment.') |
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p.add_argument('-v', '--version', action='version', |
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version=coredata.version) |
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# See the mesonlib.WrapMode enum for documentation |
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p.add_argument('--wrap-mode', default=WrapMode.default, |
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type=wrapmodetype, choices=WrapMode, |
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help='Special wrap mode to use') |
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p.add_argument('--profile-self', action='store_true', dest='profile', |
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help=argparse.SUPPRESS) |
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p.add_argument('builddir', nargs='?', default='..') |
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p.add_argument('sourcedir', nargs='?', default='.') |
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return p |
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def wrapmodetype(string): |
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try: |
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return getattr(WrapMode, string) |
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except AttributeError: |
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msg = ', '.join([t.name.lower() for t in WrapMode]) |
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msg = 'invalid argument {!r}, use one of {}'.format(string, msg) |
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raise argparse.ArgumentTypeError(msg) |
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class MesonApp: |
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def __init__(self, dir1, dir2, handshake, options): |
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(self.source_dir, self.build_dir) = self.validate_dirs(dir1, dir2, handshake) |
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self.options = options |
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def has_build_file(self, dirname): |
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fname = os.path.join(dirname, environment.build_filename) |
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return os.path.exists(fname) |
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def validate_core_dirs(self, dir1, dir2): |
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ndir1 = os.path.abspath(os.path.realpath(dir1)) |
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ndir2 = os.path.abspath(os.path.realpath(dir2)) |
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if not os.path.exists(ndir1): |
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os.makedirs(ndir1) |
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if not os.path.exists(ndir2): |
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os.makedirs(ndir2) |
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if not stat.S_ISDIR(os.stat(ndir1).st_mode): |
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raise RuntimeError('%s is not a directory' % dir1) |
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if not stat.S_ISDIR(os.stat(ndir2).st_mode): |
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raise RuntimeError('%s is not a directory' % dir2) |
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if os.path.samefile(dir1, dir2): |
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raise RuntimeError('Source and build directories must not be the same. Create a pristine build directory.') |
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if self.has_build_file(ndir1): |
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if self.has_build_file(ndir2): |
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raise RuntimeError('Both directories contain a build file %s.' % environment.build_filename) |
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return ndir1, ndir2 |
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if self.has_build_file(ndir2): |
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return ndir2, ndir1 |
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raise RuntimeError('Neither directory contains a build file %s.' % environment.build_filename) |
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def validate_dirs(self, dir1, dir2, handshake): |
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(src_dir, build_dir) = self.validate_core_dirs(dir1, dir2) |
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priv_dir = os.path.join(build_dir, 'meson-private/coredata.dat') |
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if os.path.exists(priv_dir): |
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if not handshake: |
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print('Directory already configured, exiting Meson. Just run your build command\n' |
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'(e.g. ninja) and Meson will regenerate as necessary. If ninja fails, run ninja\n' |
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'reconfigure to force Meson to regenerate.\n' |
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'\nIf build failures persist, manually wipe your build directory to clear any\n' |
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'stored system data.\n' |
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'\nTo change option values, run meson configure instead.') |
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sys.exit(0) |
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else: |
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if handshake: |
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raise RuntimeError('Something went terribly wrong. Please file a bug.') |
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return src_dir, build_dir |
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def check_pkgconfig_envvar(self, env): |
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curvar = os.environ.get('PKG_CONFIG_PATH', '') |
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if curvar != env.coredata.pkgconf_envvar: |
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mlog.warning('PKG_CONFIG_PATH has changed between invocations from "%s" to "%s".' % |
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(env.coredata.pkgconf_envvar, curvar)) |
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env.coredata.pkgconf_envvar = curvar |
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def generate(self): |
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env = environment.Environment(self.source_dir, self.build_dir, self.options) |
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mlog.initialize(env.get_log_dir()) |
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with mesonlib.BuildDirLock(self.build_dir): |
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self._generate(env) |
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def _generate(self, env): |
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mlog.debug('Build started at', datetime.datetime.now().isoformat()) |
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mlog.debug('Main binary:', sys.executable) |
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mlog.debug('Python system:', platform.system()) |
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mlog.log(mlog.bold('The Meson build system')) |
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self.check_pkgconfig_envvar(env) |
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mlog.log('Version:', coredata.version) |
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mlog.log('Source dir:', mlog.bold(self.source_dir)) |
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mlog.log('Build dir:', mlog.bold(self.build_dir)) |
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if env.is_cross_build(): |
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mlog.log('Build type:', mlog.bold('cross build')) |
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else: |
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mlog.log('Build type:', mlog.bold('native build')) |
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b = build.Build(env) |
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intr = interpreter.Interpreter(b) |
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if env.is_cross_build(): |
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mlog.log('Host machine cpu family:', mlog.bold(intr.builtin['host_machine'].cpu_family_method([], {}))) |
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mlog.log('Host machine cpu:', mlog.bold(intr.builtin['host_machine'].cpu_method([], {}))) |
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mlog.log('Target machine cpu family:', mlog.bold(intr.builtin['target_machine'].cpu_family_method([], {}))) |
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mlog.log('Target machine cpu:', mlog.bold(intr.builtin['target_machine'].cpu_method([], {}))) |
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mlog.log('Build machine cpu family:', mlog.bold(intr.builtin['build_machine'].cpu_family_method([], {}))) |
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mlog.log('Build machine cpu:', mlog.bold(intr.builtin['build_machine'].cpu_method([], {}))) |
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if self.options.profile: |
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fname = os.path.join(self.build_dir, 'meson-private', 'profile-interpreter.log') |
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profile.runctx('intr.run()', globals(), locals(), filename=fname) |
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else: |
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intr.run() |
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# Print all default option values that don't match the current value |
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for def_opt_name, def_opt_value, cur_opt_value in intr.get_non_matching_default_options(): |
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mlog.log('Option', mlog.bold(def_opt_name), 'is:', |
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mlog.bold(str(cur_opt_value)), |
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'[default: {}]'.format(str(def_opt_value))) |
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try: |
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dumpfile = os.path.join(env.get_scratch_dir(), 'build.dat') |
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# We would like to write coredata as late as possible since we use the existence of |
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# this file to check if we generated the build file successfully. Since coredata |
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# includes settings, the build files must depend on it and appear newer. However, due |
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# to various kernel caches, we cannot guarantee that any time in Python is exactly in |
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# sync with the time that gets applied to any files. Thus, we dump this file as late as |
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# possible, but before build files, and if any error occurs, delete it. |
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cdf = env.dump_coredata() |
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if self.options.profile: |
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fname = 'profile-{}-backend.log'.format(intr.backend.name) |
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fname = os.path.join(self.build_dir, 'meson-private', fname) |
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profile.runctx('intr.backend.generate(intr)', globals(), locals(), filename=fname) |
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else: |
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intr.backend.generate(intr) |
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build.save(b, dumpfile) |
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# Post-conf scripts must be run after writing coredata or else introspection fails. |
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intr.backend.run_postconf_scripts() |
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except: |
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if 'cdf' in locals(): |
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old_cdf = cdf + '.prev' |
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if os.path.exists(old_cdf): |
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os.replace(old_cdf, cdf) |
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else: |
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os.unlink(cdf) |
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raise |
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def run_script_command(args): |
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cmdname = args[0] |
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cmdargs = args[1:] |
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if cmdname == 'exe': |
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import mesonbuild.scripts.meson_exe as abc |
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cmdfunc = abc.run |
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elif cmdname == 'cleantrees': |
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import mesonbuild.scripts.cleantrees as abc |
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cmdfunc = abc.run |
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elif cmdname == 'commandrunner': |
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import mesonbuild.scripts.commandrunner as abc |
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cmdfunc = abc.run |
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elif cmdname == 'delsuffix': |
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import mesonbuild.scripts.delwithsuffix as abc |
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cmdfunc = abc.run |
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elif cmdname == 'dirchanger': |
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import mesonbuild.scripts.dirchanger as abc |
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cmdfunc = abc.run |
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elif cmdname == 'gtkdoc': |
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import mesonbuild.scripts.gtkdochelper as abc |
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cmdfunc = abc.run |
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elif cmdname == 'msgfmthelper': |
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import mesonbuild.scripts.msgfmthelper as abc |
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cmdfunc = abc.run |
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elif cmdname == 'regencheck': |
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import mesonbuild.scripts.regen_checker as abc |
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cmdfunc = abc.run |
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elif cmdname == 'symbolextractor': |
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import mesonbuild.scripts.symbolextractor as abc |
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cmdfunc = abc.run |
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elif cmdname == 'scanbuild': |
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import mesonbuild.scripts.scanbuild as abc |
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cmdfunc = abc.run |
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elif cmdname == 'vcstagger': |
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import mesonbuild.scripts.vcstagger as abc |
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cmdfunc = abc.run |
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elif cmdname == 'gettext': |
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import mesonbuild.scripts.gettext as abc |
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cmdfunc = abc.run |
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elif cmdname == 'yelphelper': |
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import mesonbuild.scripts.yelphelper as abc |
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cmdfunc = abc.run |
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elif cmdname == 'uninstall': |
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import mesonbuild.scripts.uninstall as abc |
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cmdfunc = abc.run |
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elif cmdname == 'dist': |
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import mesonbuild.scripts.dist as abc |
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cmdfunc = abc.run |
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elif cmdname == 'coverage': |
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import mesonbuild.scripts.coverage as abc |
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cmdfunc = abc.run |
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else: |
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raise MesonException('Unknown internal command {}.'.format(cmdname)) |
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return cmdfunc(cmdargs) |
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def set_meson_command(mainfile): |
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if mainfile.endswith('.exe'): |
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mesonlib.meson_command = [mainfile] |
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elif os.path.isabs(mainfile) and mainfile.endswith('mesonmain.py'): |
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# Can't actually run meson with an absolute path to mesonmain.py, it must be run as -m mesonbuild.mesonmain |
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mesonlib.meson_command = mesonlib.python_command + ['-m', 'mesonbuild.mesonmain'] |
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else: |
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mesonlib.meson_command = mesonlib.python_command + [mainfile] |
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# This won't go into the log file because it's not initialized yet, and we |
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# need this value for unit tests. |
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if 'MESON_COMMAND_TESTS' in os.environ: |
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mlog.log('meson_command is {!r}'.format(mesonlib.meson_command)) |
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def run(original_args, mainfile): |
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if sys.version_info < (3, 5): |
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print('Meson works correctly only with python 3.5+.') |
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print('You have python %s.' % sys.version) |
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print('Please update your environment') |
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return 1 |
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# https://github.com/mesonbuild/meson/issues/3653 |
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if sys.platform.lower() == 'msys': |
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mlog.error('This python3 seems to be msys/python on MSYS2 Windows, which is known to have path semantics incompatible with Meson') |
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msys2_arch = detect_msys2_arch() |
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if msys2_arch: |
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mlog.error('Please install and use mingw-w64-i686-python3 and/or mingw-w64-x86_64-python3 with Pacman') |
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else: |
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mlog.error('Please download and use Python as detailed at: https://mesonbuild.com/Getting-meson.html') |
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return 2 |
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# Set the meson command that will be used to run scripts and so on |
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set_meson_command(mainfile) |
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args = original_args[:] |
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if len(args) > 0: |
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# First check if we want to run a subcommand. |
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cmd_name = args[0] |
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remaining_args = args[1:] |
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# "help" is a special case: Since printing of the help may be |
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# delegated to a subcommand, we edit cmd_name before executing |
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# the rest of the logic here. |
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if cmd_name == 'help': |
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remaining_args += ['--help'] |
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args = remaining_args |
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cmd_name = args[0] |
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if cmd_name == 'test': |
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from . import mtest |
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return mtest.run(remaining_args) |
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elif cmd_name == 'setup': |
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args = remaining_args |
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# FALLTHROUGH like it's 1972. |
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elif cmd_name == 'install': |
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from . import minstall |
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return minstall.run(remaining_args) |
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elif cmd_name == 'introspect': |
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from . import mintro |
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return mintro.run(remaining_args) |
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elif cmd_name == 'rewrite': |
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from . import rewriter |
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return rewriter.run(remaining_args) |
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elif cmd_name == 'configure': |
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try: |
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from . import mconf |
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return mconf.run(remaining_args) |
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except MesonException as e: |
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mlog.exception(e) |
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sys.exit(1) |
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elif cmd_name == 'wrap': |
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from .wrap import wraptool |
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return wraptool.run(remaining_args) |
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elif cmd_name == 'init': |
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from . import minit |
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return minit.run(remaining_args) |
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elif cmd_name == 'runpython': |
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import runpy |
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script_file = remaining_args[0] |
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sys.argv[1:] = remaining_args[1:] |
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runpy.run_path(script_file, run_name='__main__') |
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sys.exit(0) |
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# No special command? Do the basic setup/reconf. |
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if len(args) >= 2 and args[0] == '--internal': |
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if args[1] != 'regenerate': |
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script = args[1] |
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try: |
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sys.exit(run_script_command(args[1:])) |
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except MesonException as e: |
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mlog.error('\nError in {} helper script:'.format(script)) |
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mlog.exception(e) |
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sys.exit(1) |
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args = args[2:] |
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handshake = True |
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else: |
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handshake = False |
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parser = create_parser() |
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args = mesonlib.expand_arguments(args) |
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options = parser.parse_args(args) |
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coredata.parse_cmd_line_options(options) |
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dir1 = options.builddir |
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dir2 = options.sourcedir |
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try: |
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app = MesonApp(dir1, dir2, handshake, options) |
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except Exception as e: |
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# Log directory does not exist, so just print |
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# to stdout. |
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print('Error during basic setup:\n') |
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print(e) |
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return 1 |
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try: |
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app.generate() |
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except Exception as e: |
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if isinstance(e, MesonException): |
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mlog.exception(e) |
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# Path to log file |
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mlog.shutdown() |
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logfile = os.path.join(app.build_dir, environment.Environment.log_dir, mlog.log_fname) |
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mlog.log("\nA full log can be found at", mlog.bold(logfile)) |
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if os.environ.get('MESON_FORCE_BACKTRACE'): |
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raise |
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return 1 |
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else: |
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if os.environ.get('MESON_FORCE_BACKTRACE'): |
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raise |
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traceback.print_exc() |
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return 2 |
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finally: |
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mlog.shutdown() |
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return 0 |
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def main(): |
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# Always resolve the command path so Ninja can find it for regen, tests, etc. |
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launcher = os.path.realpath(sys.argv[0]) |
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return run(sys.argv[1:], launcher) |
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if __name__ == '__main__': |
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sys.exit(main())
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