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# Copyright 2022 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.
from __future__ import annotations
import json, sysconfig
from pathlib import Path
import typing as T
from .. import mesonlib, mlog
from .base import DependencyMethods, SystemDependency
from .factory import DependencyFactory
from ..environment import detect_cpu_family
from ..programs import ExternalProgram
if T.TYPE_CHECKING:
from typing_extensions import TypedDict
from ..environment import Environment
class PythonIntrospectionDict(TypedDict):
install_paths: T.Dict[str, str]
is_pypy: bool
is_venv: bool
link_libpython: bool
sysconfig_paths: T.Dict[str, str]
paths: T.Dict[str, str]
platform: str
suffix: str
variables: T.Dict[str, str]
version: str
class BasicPythonExternalProgram(ExternalProgram):
def __init__(self, name: str, command: T.Optional[T.List[str]] = None,
ext_prog: T.Optional[ExternalProgram] = None):
if ext_prog is None:
super().__init__(name, command=command, silent=True)
else:
self.name = name
self.command = ext_prog.command
self.path = ext_prog.path
# We want strong key values, so we always populate this with bogus data.
# Otherwise to make the type checkers happy we'd have to do .get() for
# everycall, even though we know that the introspection data will be
# complete
self.info: 'PythonIntrospectionDict' = {
'install_paths': {},
'is_pypy': False,
'is_venv': False,
'link_libpython': False,
'sysconfig_paths': {},
'paths': {},
'platform': 'sentinal',
'suffix': 'sentinel',
'variables': {},
'version': '0.0',
}
self.pure: bool = True
def _check_version(self, version: str) -> bool:
if self.name == 'python2':
return mesonlib.version_compare(version, '< 3.0')
elif self.name == 'python3':
return mesonlib.version_compare(version, '>= 3.0')
return True
def sanity(self) -> bool:
# Sanity check, we expect to have something that at least quacks in tune
import importlib.resources
with importlib.resources.path('mesonbuild.scripts', 'python_info.py') as f:
cmd = self.get_command() + [str(f)]
p, stdout, stderr = mesonlib.Popen_safe(cmd)
try:
info = json.loads(stdout)
except json.JSONDecodeError:
info = None
mlog.debug('Could not introspect Python (%s): exit code %d' % (str(p.args), p.returncode))
mlog.debug('Program stdout:\n')
mlog.debug(stdout)
mlog.debug('Program stderr:\n')
mlog.debug(stderr)
if info is not None and self._check_version(info['version']):
self.info = T.cast('PythonIntrospectionDict', info)
return True
else:
return False
class Python3DependencySystem(SystemDependency):
def __init__(self, name: str, environment: 'Environment', kwargs: T.Dict[str, T.Any]) -> None:
super().__init__(name, environment, kwargs)
if not environment.machines.matches_build_machine(self.for_machine):
return
if not environment.machines[self.for_machine].is_windows():
return
self.name = 'python3'
# We can only be sure that it is Python 3 at this point
self.version = '3'
self._find_libpy3_windows(environment)
@staticmethod
def get_windows_python_arch() -> T.Optional[str]:
pyplat = sysconfig.get_platform()
if pyplat == 'mingw':
pycc = sysconfig.get_config_var('CC')
if pycc.startswith('x86_64'):
return '64'
elif pycc.startswith(('i686', 'i386')):
return '32'
else:
mlog.log(f'MinGW Python built with unknown CC {pycc!r}, please file a bug')
return None
elif pyplat == 'win32':
return '32'
elif pyplat in {'win64', 'win-amd64'}:
return '64'
mlog.log(f'Unknown Windows Python platform {pyplat!r}')
return None
def get_windows_link_args(self) -> T.Optional[T.List[str]]:
pyplat = sysconfig.get_platform()
if pyplat.startswith('win'):
vernum = sysconfig.get_config_var('py_version_nodot')
if self.static:
libpath = Path('libs') / f'libpython{vernum}.a'
else:
comp = self.get_compiler()
if comp.id == "gcc":
libpath = Path(f'python{vernum}.dll')
else:
libpath = Path('libs') / f'python{vernum}.lib'
lib = Path(sysconfig.get_config_var('base')) / libpath
elif pyplat == 'mingw':
if self.static:
libname = sysconfig.get_config_var('LIBRARY')
else:
libname = sysconfig.get_config_var('LDLIBRARY')
lib = Path(sysconfig.get_config_var('LIBDIR')) / libname
if not lib.exists():
mlog.log('Could not find Python3 library {!r}'.format(str(lib)))
return None
return [str(lib)]
def _find_libpy3_windows(self, env: 'Environment') -> None:
'''
Find python3 libraries on Windows and also verify that the arch matches
what we are building for.
'''
pyarch = self.get_windows_python_arch()
if pyarch is None:
self.is_found = False
return
arch = detect_cpu_family(env.coredata.compilers.host)
if arch == 'x86':
arch = '32'
elif arch == 'x86_64':
arch = '64'
else:
# We can't cross-compile Python 3 dependencies on Windows yet
mlog.log(f'Unknown architecture {arch!r} for',
mlog.bold(self.name))
self.is_found = False
return
# Pyarch ends in '32' or '64'
if arch != pyarch:
mlog.log('Need', mlog.bold(self.name), 'for {}-bit, but '
'found {}-bit'.format(arch, pyarch))
self.is_found = False
return
# This can fail if the library is not found
largs = self.get_windows_link_args()
if largs is None:
self.is_found = False
return
self.link_args = largs
# Compile args
inc = sysconfig.get_path('include')
platinc = sysconfig.get_path('platinclude')
self.compile_args = ['-I' + inc]
if inc != platinc:
self.compile_args.append('-I' + platinc)
self.version = sysconfig.get_config_var('py_version')
self.is_found = True
@staticmethod
def log_tried() -> str:
return 'sysconfig'
python3_factory = DependencyFactory(
'python3',
[DependencyMethods.PKGCONFIG, DependencyMethods.SYSTEM, DependencyMethods.EXTRAFRAMEWORK],
system_class=Python3DependencySystem,
# There is no version number in the macOS version number
framework_name='Python',
# There is a python in /System/Library/Frameworks, but that's python 2.x,
# Python 3 will always be in /Library
extra_kwargs={'paths': ['/Library/Frameworks']},
)
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