The Meson Build System
http://mesonbuild.com/
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247 lines
12 KiB
247 lines
12 KiB
5 years ago
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# Copyright 2016-2018 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 typing as T
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import time
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import sys, stat
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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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import argparse
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import tempfile
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import shutil
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import glob
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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 . import mintro
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from .mconf import make_lower_case
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from .mesonlib import MesonException
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def add_arguments(parser):
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coredata.register_builtin_arguments(parser)
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parser.add_argument('--native-file',
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default=[],
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action='append',
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help='File containing overrides for native compilation environment.')
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parser.add_argument('--cross-file',
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default=[],
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action='append',
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help='File describing cross compilation environment.')
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parser.add_argument('-v', '--version', action='version',
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version=coredata.version)
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parser.add_argument('--profile-self', action='store_true', dest='profile',
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help=argparse.SUPPRESS)
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parser.add_argument('--fatal-meson-warnings', action='store_true', dest='fatal_warnings',
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help='Make all Meson warnings fatal')
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parser.add_argument('--reconfigure', action='store_true',
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help='Set options and reconfigure the project. Useful when new ' +
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'options have been added to the project and the default value ' +
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'is not working.')
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parser.add_argument('--wipe', action='store_true',
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help='Wipe build directory and reconfigure using previous command line options. ' +
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'Useful when build directory got corrupted, or when rebuilding with a ' +
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'newer version of meson.')
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parser.add_argument('builddir', nargs='?', default=None)
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parser.add_argument('sourcedir', nargs='?', default=None)
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class MesonApp:
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def __init__(self, options):
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(self.source_dir, self.build_dir) = self.validate_dirs(options.builddir,
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options.sourcedir,
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options.reconfigure,
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options.wipe)
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if options.wipe:
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# Make a copy of the cmd line file to make sure we can always
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# restore that file if anything bad happens. For example if
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# configuration fails we need to be able to wipe again.
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restore = []
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with tempfile.TemporaryDirectory() as d:
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for filename in [coredata.get_cmd_line_file(self.build_dir)] + glob.glob(os.path.join(self.build_dir, environment.Environment.private_dir, '*.ini')):
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try:
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restore.append((shutil.copy(filename, d), filename))
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except FileNotFoundError:
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raise MesonException(
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'Cannot find cmd_line.txt. This is probably because this '
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'build directory was configured with a meson version < 0.49.0.')
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coredata.read_cmd_line_file(self.build_dir, options)
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try:
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# Don't delete the whole tree, just all of the files and
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# folders in the tree. Otherwise calling wipe form the builddir
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# will cause a crash
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for l in os.listdir(self.build_dir):
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l = os.path.join(self.build_dir, l)
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if os.path.isdir(l) and not os.path.islink(l):
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mesonlib.windows_proof_rmtree(l)
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else:
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mesonlib.windows_proof_rm(l)
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finally:
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for b, f in restore:
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os.makedirs(os.path.dirname(f), exist_ok=True)
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shutil.move(b, f)
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self.options = options
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def has_build_file(self, dirname: str) -> bool:
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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: str, dir2: str) -> T.Tuple[str, str]:
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if dir1 is None:
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if dir2 is None:
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if not os.path.exists('meson.build') and os.path.exists('../meson.build'):
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dir2 = '..'
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else:
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raise MesonException('Must specify at least one directory name.')
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dir1 = os.getcwd()
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if dir2 is None:
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dir2 = os.getcwd()
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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 MesonException('{} is not a directory'.format(dir1))
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if not stat.S_ISDIR(os.stat(ndir2).st_mode):
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raise MesonException('{} is not a directory'.format(dir2))
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if os.path.samefile(dir1, dir2):
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raise MesonException('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 MesonException('Both directories contain a build file {}.'.format(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 MesonException('Neither directory contains a build file {}.'.format(environment.build_filename))
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def validate_dirs(self, dir1: str, dir2: str, reconfigure: bool, wipe: bool) -> T.Tuple[str, str]:
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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 reconfigure and not wipe:
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print('Directory already configured.\n'
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'\nJust run your build command (e.g. ninja) and Meson will regenerate as necessary.\n'
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'If ninja fails, run "ninja reconfigure" or "meson --reconfigure"\n'
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'to force Meson to regenerate.\n'
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'\nIf build failures persist, run "meson setup --wipe" to rebuild from scratch\n'
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'using the same options as passed when configuring the build.'
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'\nTo change option values, run "meson configure" instead.')
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raise SystemExit
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else:
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has_cmd_line_file = os.path.exists(coredata.get_cmd_line_file(build_dir))
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if (wipe and not has_cmd_line_file) or (not wipe and reconfigure):
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raise SystemExit('Directory does not contain a valid build tree:\n{}'.format(build_dir))
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return src_dir, build_dir
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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(), self.options.fatal_warnings)
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if self.options.profile:
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mlog.set_timestamp_start(time.monotonic())
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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('Build Options:', coredata.get_cmd_line_options(self.build_dir, self.options))
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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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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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logger_fun = mlog.log
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else:
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logger_fun = mlog.debug
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logger_fun('Build machine cpu family:', mlog.bold(intr.builtin['build_machine'].cpu_family_method([], {})))
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logger_fun('Build machine cpu:', mlog.bold(intr.builtin['build_machine'].cpu_method([], {})))
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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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logger_fun('Target machine cpu family:', mlog.bold(intr.builtin['target_machine'].cpu_family_method([], {})))
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logger_fun('Target machine cpu:', mlog.bold(intr.builtin['target_machine'].cpu_method([], {})))
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try:
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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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except Exception as e:
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mintro.write_meson_info_file(b, [e])
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raise
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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('{}'.format(make_lower_case(cur_opt_value.printable_value()))),
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'[default: {}]'.format(make_lower_case(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()', globals(), locals(), filename=fname)
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else:
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intr.backend.generate()
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build.save(b, dumpfile)
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if env.first_invocation:
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coredata.write_cmd_line_file(self.build_dir, self.options)
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else:
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coredata.update_cmd_line_file(self.build_dir, self.options)
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# Generate an IDE introspection file with the same syntax as the already existing API
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if self.options.profile:
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fname = os.path.join(self.build_dir, 'meson-private', 'profile-introspector.log')
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profile.runctx('mintro.generate_introspection_file(b, intr.backend)', globals(), locals(), filename=fname)
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else:
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mintro.generate_introspection_file(b, intr.backend)
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mintro.write_meson_info_file(b, [], True)
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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 Exception as e:
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mintro.write_meson_info_file(b, [e])
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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(options) -> int:
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coredata.parse_cmd_line_options(options)
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app = MesonApp(options)
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app.generate()
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return 0
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