# Copyright 2016-2018 The Meson development team # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # http://www.apache.org/licenses/LICENSE-2.0 # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import typing as T import time import sys, stat import datetime import os.path import platform import cProfile as profile import argparse import tempfile import shutil import glob from . import environment, interpreter, mesonlib from . import build from . import mlog, coredata from . import mintro from .mesonlib import MesonException, MachineChoice from .dependencies import PkgConfigDependency git_ignore_file = '''# This file is autogenerated by Meson. If you change or delete it, it won't be recreated. * ''' hg_ignore_file = '''# This file is autogenerated by Meson. If you change or delete it, it won't be recreated. syntax: glob **/* ''' def add_arguments(parser: argparse.ArgumentParser) -> None: coredata.register_builtin_arguments(parser) parser.add_argument('--native-file', default=[], action='append', help='File containing overrides for native compilation environment.') parser.add_argument('--cross-file', default=[], action='append', help='File describing cross compilation environment.') parser.add_argument('--vsenv', action='store_true', help='Setup Visual Studio environment even when other compilers are found, ' + 'abort if Visual Studio is not found. This option has no effect on other ' + 'platforms than Windows. Defaults to True when using "vs" backend.') parser.add_argument('-v', '--version', action='version', version=coredata.version) parser.add_argument('--profile-self', action='store_true', dest='profile', help=argparse.SUPPRESS) parser.add_argument('--fatal-meson-warnings', action='store_true', dest='fatal_warnings', help='Make all Meson warnings fatal') parser.add_argument('--reconfigure', action='store_true', help='Set options and reconfigure the project. Useful when new ' + 'options have been added to the project and the default value ' + 'is not working.') parser.add_argument('--wipe', action='store_true', help='Wipe build directory and reconfigure using previous command line options. ' + 'Useful when build directory got corrupted, or when rebuilding with a ' + 'newer version of meson.') parser.add_argument('builddir', nargs='?', default=None) parser.add_argument('sourcedir', nargs='?', default=None) class MesonApp: def __init__(self, options: argparse.Namespace) -> None: (self.source_dir, self.build_dir) = self.validate_dirs(options.builddir, options.sourcedir, options.reconfigure, options.wipe) if options.wipe: # Make a copy of the cmd line file to make sure we can always # restore that file if anything bad happens. For example if # configuration fails we need to be able to wipe again. restore = [] with tempfile.TemporaryDirectory() as d: for filename in [coredata.get_cmd_line_file(self.build_dir)] + glob.glob(os.path.join(self.build_dir, environment.Environment.private_dir, '*.ini')): try: restore.append((shutil.copy(filename, d), filename)) except FileNotFoundError: raise MesonException( 'Cannot find cmd_line.txt. This is probably because this ' 'build directory was configured with a meson version < 0.49.0.') coredata.read_cmd_line_file(self.build_dir, options) try: # Don't delete the whole tree, just all of the files and # folders in the tree. Otherwise calling wipe form the builddir # will cause a crash for l in os.listdir(self.build_dir): l = os.path.join(self.build_dir, l) if os.path.isdir(l) and not os.path.islink(l): mesonlib.windows_proof_rmtree(l) else: mesonlib.windows_proof_rm(l) finally: self.add_vcs_ignore_files(self.build_dir) for b, f in restore: os.makedirs(os.path.dirname(f), exist_ok=True) shutil.move(b, f) self.options = options def has_build_file(self, dirname: str) -> bool: fname = os.path.join(dirname, environment.build_filename) return os.path.exists(fname) def validate_core_dirs(self, dir1: str, dir2: str) -> T.Tuple[str, str]: if dir1 is None: if dir2 is None: if not os.path.exists('meson.build') and os.path.exists('../meson.build'): dir2 = '..' else: raise MesonException('Must specify at least one directory name.') dir1 = os.getcwd() if dir2 is None: dir2 = os.getcwd() ndir1 = os.path.abspath(os.path.realpath(dir1)) ndir2 = os.path.abspath(os.path.realpath(dir2)) if not os.path.exists(ndir1): os.makedirs(ndir1) if not os.path.exists(ndir2): os.makedirs(ndir2) if not stat.S_ISDIR(os.stat(ndir1).st_mode): raise MesonException(f'{dir1} is not a directory') if not stat.S_ISDIR(os.stat(ndir2).st_mode): raise MesonException(f'{dir2} is not a directory') if os.path.samefile(ndir1, ndir2): # Fallback to textual compare if undefined entries found has_undefined = any((s.st_ino == 0 and s.st_dev == 0) for s in (os.stat(ndir1), os.stat(ndir2))) if not has_undefined or ndir1 == ndir2: raise MesonException('Source and build directories must not be the same. Create a pristine build directory.') if self.has_build_file(ndir1): if self.has_build_file(ndir2): raise MesonException(f'Both directories contain a build file {environment.build_filename}.') return ndir1, ndir2 if self.has_build_file(ndir2): return ndir2, ndir1 raise MesonException(f'Neither directory contains a build file {environment.build_filename}.') def add_vcs_ignore_files(self, build_dir: str) -> None: if os.listdir(build_dir): return with open(os.path.join(build_dir, '.gitignore'), 'w', encoding='utf-8') as ofile: ofile.write(git_ignore_file) with open(os.path.join(build_dir, '.hgignore'), 'w', encoding='utf-8') as ofile: ofile.write(hg_ignore_file) def validate_dirs(self, dir1: str, dir2: str, reconfigure: bool, wipe: bool) -> T.Tuple[str, str]: (src_dir, build_dir) = self.validate_core_dirs(dir1, dir2) self.add_vcs_ignore_files(build_dir) priv_dir = os.path.join(build_dir, 'meson-private/coredata.dat') if os.path.exists(priv_dir): if not reconfigure and not wipe: print('Directory already configured.\n' '\nJust run your build command (e.g. ninja) and Meson will regenerate as necessary.\n' 'If ninja fails, run "ninja reconfigure" or "meson setup --reconfigure"\n' 'to force Meson to regenerate.\n' '\nIf build failures persist, run "meson setup --wipe" to rebuild from scratch\n' 'using the same options as passed when configuring the build.' '\nTo change option values, run "meson configure" instead.') raise SystemExit else: has_cmd_line_file = os.path.exists(coredata.get_cmd_line_file(build_dir)) if (wipe and not has_cmd_line_file) or (not wipe and reconfigure): raise SystemExit(f'Directory does not contain a valid build tree:\n{build_dir}') return src_dir, build_dir def generate(self) -> None: env = environment.Environment(self.source_dir, self.build_dir, self.options) mlog.initialize(env.get_log_dir(), self.options.fatal_warnings) if self.options.profile: mlog.set_timestamp_start(time.monotonic()) with mesonlib.BuildDirLock(self.build_dir): self._generate(env) def _generate(self, env: environment.Environment) -> None: # Get all user defined options, including options that have been defined # during a previous invocation or using meson configure. user_defined_options = argparse.Namespace(**vars(self.options)) coredata.read_cmd_line_file(self.build_dir, user_defined_options) mlog.debug('Build started at', datetime.datetime.now().isoformat()) mlog.debug('Main binary:', sys.executable) mlog.debug('Build Options:', coredata.format_cmd_line_options(user_defined_options)) mlog.debug('Python system:', platform.system()) mlog.log(mlog.bold('The Meson build system')) mlog.log('Version:', coredata.version) mlog.log('Source dir:', mlog.bold(self.source_dir)) mlog.log('Build dir:', mlog.bold(self.build_dir)) if env.is_cross_build(): mlog.log('Build type:', mlog.bold('cross build')) else: mlog.log('Build type:', mlog.bold('native build')) b = build.Build(env) intr = interpreter.Interpreter(b, user_defined_options=user_defined_options) if env.is_cross_build(): logger_fun = mlog.log else: logger_fun = mlog.debug build_machine = intr.builtin['build_machine'] host_machine = intr.builtin['host_machine'] target_machine = intr.builtin['target_machine'] assert isinstance(build_machine, interpreter.MachineHolder) assert isinstance(host_machine, interpreter.MachineHolder) assert isinstance(target_machine, interpreter.MachineHolder) logger_fun('Build machine cpu family:', mlog.bold(build_machine.cpu_family_method([], {}))) logger_fun('Build machine cpu:', mlog.bold(build_machine.cpu_method([], {}))) mlog.log('Host machine cpu family:', mlog.bold(host_machine.cpu_family_method([], {}))) mlog.log('Host machine cpu:', mlog.bold(host_machine.cpu_method([], {}))) logger_fun('Target machine cpu family:', mlog.bold(target_machine.cpu_family_method([], {}))) logger_fun('Target machine cpu:', mlog.bold(target_machine.cpu_method([], {}))) try: if self.options.profile: fname = os.path.join(self.build_dir, 'meson-private', 'profile-interpreter.log') profile.runctx('intr.run()', globals(), locals(), filename=fname) else: intr.run() except Exception as e: mintro.write_meson_info_file(b, [e]) raise try: dumpfile = os.path.join(env.get_scratch_dir(), 'build.dat') # We would like to write coredata as late as possible since we use the existence of # this file to check if we generated the build file successfully. Since coredata # includes settings, the build files must depend on it and appear newer. However, due # to various kernel caches, we cannot guarantee that any time in Python is exactly in # sync with the time that gets applied to any files. Thus, we dump this file as late as # possible, but before build files, and if any error occurs, delete it. cdf = env.dump_coredata() if self.options.profile: fname = f'profile-{intr.backend.name}-backend.log' fname = os.path.join(self.build_dir, 'meson-private', fname) profile.runctx('intr.backend.generate()', globals(), locals(), filename=fname) else: intr.backend.generate() self._finalize_devenv(b, intr) build.save(b, dumpfile) if env.first_invocation: # Use path resolved by coredata because they could have been # read from a pipe and wrote into a private file. self.options.cross_file = env.coredata.cross_files self.options.native_file = env.coredata.config_files coredata.write_cmd_line_file(self.build_dir, self.options) else: coredata.update_cmd_line_file(self.build_dir, self.options) # Generate an IDE introspection file with the same syntax as the already existing API if self.options.profile: fname = os.path.join(self.build_dir, 'meson-private', 'profile-introspector.log') profile.runctx('mintro.generate_introspection_file(b, intr.backend)', globals(), locals(), filename=fname) else: mintro.generate_introspection_file(b, intr.backend) mintro.write_meson_info_file(b, [], True) # Post-conf scripts must be run after writing coredata or else introspection fails. intr.backend.run_postconf_scripts() # collect warnings about unsupported build configurations; must be done after full arg processing # by Interpreter() init, but this is most visible at the end if env.coredata.options[mesonlib.OptionKey('backend')].value == 'xcode': mlog.warning('xcode backend is currently unmaintained, patches welcome') if env.coredata.options[mesonlib.OptionKey('layout')].value == 'flat': mlog.warning('-Dlayout=flat is unsupported and probably broken. It was a failed experiment at ' 'making Windows build artifacts runnable while uninstalled, due to PATH considerations, ' 'but was untested by CI and anyways breaks reasonable use of conflicting targets in different subdirs. ' 'Please consider using `meson devenv` instead. See https://github.com/mesonbuild/meson/pull/9243 ' 'for details.') except Exception as e: mintro.write_meson_info_file(b, [e]) if 'cdf' in locals(): old_cdf = cdf + '.prev' if os.path.exists(old_cdf): os.replace(old_cdf, cdf) else: os.unlink(cdf) raise def _finalize_devenv(self, b: build.Build, intr: interpreter.Interpreter) -> None: b.devenv.append(intr.backend.get_devenv()) b.devenv.append(PkgConfigDependency.get_env(intr.environment, MachineChoice.HOST, uninstalled=True)) for mod in intr.modules.values(): devenv = mod.get_devenv() if devenv: b.devenv.append(devenv) def run(options: T.Union[argparse.Namespace, T.List[str]]) -> int: if not isinstance(options, argparse.Namespace): parser = argparse.ArgumentParser() add_arguments(parser) options = parser.parse_args(options) coredata.parse_cmd_line_options(options) app = MesonApp(options) app.generate() return 0