# 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 time
import sys, stat
import datetime
import os.path
import platform
import cProfile as profile
import argparse
from . import environment, interpreter, mesonlib
from . import build
from . import mlog, coredata
from . import mintro
from .mesonlib import MesonException
def add_arguments(parser):
coredata.register_builtin_arguments(parser)
parser.add_argument('--cross-file', default=None,
help='File describing cross compilation environment.')
parser.add_argument('--native-file',
default=[],
action='append',
help='File containing overrides for native compilation environment.')
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. ' +
'Userful 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):
(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.
filename = coredata.get_cmd_line_file(self.build_dir)
try:
with open(filename, 'r') as f:
content = f.read()
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):
mesonlib.windows_proof_rmtree(l)
else:
mesonlib.windows_proof_rm(l)
finally:
# Restore the file
path = os.path.dirname(filename)
os.makedirs(path, exist_ok=True)
with open(filename, 'w') as f:
f.write(content)
self.options = options
def has_build_file(self, dirname):
fname = os.path.join(dirname, environment.build_filename)
return os.path.exists(fname)
def validate_core_dirs(self, dir1, dir2):
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('%s is not a directory' % dir1)
if not stat.S_ISDIR(os.stat(ndir2).st_mode):
raise MesonException('%s is not a directory' % dir2)
if os.path.samefile(dir1, dir2):
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('Both directories contain a build file %s.' % environment.build_filename)
return ndir1, ndir2
if self.has_build_file(ndir2):
return ndir2, ndir1
raise MesonException('Neither directory contains a build file %s.' % environment.build_filename)
def validate_dirs(self, dir1, dir2, reconfigure, wipe):
(src_dir, build_dir) = self.validate_core_dirs(dir1, dir2)
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 --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.')
sys.exit(0)
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):
print('Directory does not contain a valid build tree:\n{}'.format(build_dir))
sys.exit(1)
return src_dir, build_dir
def check_pkgconfig_envvar(self, env):
curvar = os.environ.get('PKG_CONFIG_PATH', '')
if curvar != env.coredata.pkgconf_envvar:
mlog.warning('PKG_CONFIG_PATH has changed between invocations from "%s" to "%s".' %
(env.coredata.pkgconf_envvar, curvar))
env.coredata.pkgconf_envvar = curvar
def generate(self):
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):
mlog.debug('Build started at', datetime.datetime.now().isoformat())
mlog.debug('Main binary:', sys.executable)
mlog.debug('Python system:', platform.system())
mlog.log(mlog.bold('The Meson build system'))
self.check_pkgconfig_envvar(env)
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)
if env.is_cross_build():
mlog.log('Host machine cpu family:', mlog.bold(intr.builtin['host_machine'].cpu_family_method([], {})))
mlog.log('Host machine cpu:', mlog.bold(intr.builtin['host_machine'].cpu_method([], {})))
mlog.log('Target machine cpu family:', mlog.bold(intr.builtin['target_machine'].cpu_family_method([], {})))
mlog.log('Target machine cpu:', mlog.bold(intr.builtin['target_machine'].cpu_method([], {})))
mlog.log('Build machine cpu family:', mlog.bold(intr.builtin['build_machine'].cpu_family_method([], {})))
mlog.log('Build machine cpu:', mlog.bold(intr.builtin['build_machine'].cpu_method([], {})))
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()
# Print all default option values that don't match the current value
for def_opt_name, def_opt_value, cur_opt_value in intr.get_non_matching_default_options():
mlog.log('Option', mlog.bold(def_opt_name), 'is:',
mlog.bold(str(cur_opt_value)),
'[default: {}]'.format(str(def_opt_value)))
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 = 'profile-{}-backend.log'.format(intr.backend.name)
fname = os.path.join(self.build_dir, 'meson-private', fname)
profile.runctx('intr.backend.generate(intr)', globals(), locals(), filename=fname)
else:
intr.backend.generate(intr)
build.save(b, dumpfile)
# Post-conf scripts must be run after writing coredata or else introspection fails.
intr.backend.run_postconf_scripts()
if env.first_invocation:
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)
except:
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 run(options):
coredata.parse_cmd_line_options(options)
app = MesonApp(options)
app.generate()
return 0