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782 lines
33 KiB
782 lines
33 KiB
# Copyright 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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from pathlib import Path |
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import functools |
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import json |
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import os |
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import shutil |
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import typing as T |
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from . import ExtensionModule |
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from .. import mesonlib |
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from .. import mlog |
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from ..coredata import UserFeatureOption |
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from ..build import known_shmod_kwargs |
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from ..dependencies import DependencyMethods, PkgConfigDependency, NotFoundDependency, SystemDependency, ExtraFrameworkDependency |
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from ..dependencies.base import process_method_kw |
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from ..environment import detect_cpu_family |
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from ..interpreter import ExternalProgramHolder, extract_required_kwarg, permitted_dependency_kwargs |
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from ..interpreter.type_checking import NoneType |
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from ..interpreterbase import ( |
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noPosargs, noKwargs, permittedKwargs, ContainerTypeInfo, |
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InvalidArguments, typed_pos_args, typed_kwargs, KwargInfo, |
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FeatureNew, FeatureNewKwargs, disablerIfNotFound |
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) |
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from ..mesonlib import MachineChoice |
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from ..programs import ExternalProgram, NonExistingExternalProgram |
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if T.TYPE_CHECKING: |
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from typing_extensions import TypedDict |
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from . import ModuleState |
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from ..build import SharedModule, Data |
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from ..dependencies import ExternalDependency, Dependency |
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from ..dependencies.factory import DependencyGenerator |
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from ..environment import Environment |
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from ..interpreter import Interpreter |
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from ..interpreter.kwargs import ExtractRequired |
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from ..interpreterbase.interpreterbase import TYPE_var, TYPE_kwargs |
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class PythonIntrospectionDict(TypedDict): |
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install_paths: T.Dict[str, str] |
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is_pypy: bool |
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is_venv: bool |
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link_libpython: bool |
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sysconfig_paths: T.Dict[str, str] |
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paths: T.Dict[str, str] |
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platform: str |
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suffix: str |
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variables: T.Dict[str, str] |
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version: str |
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class PyInstallKw(TypedDict): |
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pure: bool |
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subdir: str |
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install_tag: T.Optional[str] |
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class FindInstallationKw(ExtractRequired): |
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disabler: bool |
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modules: T.List[str] |
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_Base = ExternalDependency |
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else: |
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_Base = object |
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mod_kwargs = {'subdir'} |
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mod_kwargs.update(known_shmod_kwargs) |
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mod_kwargs -= {'name_prefix', 'name_suffix'} |
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class _PythonDependencyBase(_Base): |
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def __init__(self, python_holder: 'PythonInstallation', embed: bool): |
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self.name = 'python' # override the name from the "real" dependency lookup |
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self.embed = embed |
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self.version: str = python_holder.version |
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self.platform = python_holder.platform |
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self.variables = python_holder.variables |
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self.paths = python_holder.paths |
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self.link_libpython = python_holder.link_libpython |
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self.info: T.Optional[T.Dict[str, str]] = None |
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if mesonlib.version_compare(self.version, '>= 3.0'): |
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self.major_version = 3 |
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else: |
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self.major_version = 2 |
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class PythonPkgConfigDependency(PkgConfigDependency, _PythonDependencyBase): |
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def __init__(self, name: str, environment: 'Environment', |
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kwargs: T.Dict[str, T.Any], installation: 'PythonInstallation', |
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libpc: bool = False): |
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if libpc: |
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mlog.debug(f'Searching for {name!r} via pkgconfig lookup in LIBPC') |
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else: |
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mlog.debug(f'Searching for {name!r} via fallback pkgconfig lookup in default paths') |
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PkgConfigDependency.__init__(self, name, environment, kwargs) |
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_PythonDependencyBase.__init__(self, installation, kwargs.get('embed', False)) |
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if libpc and not self.is_found: |
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mlog.debug(f'"python-{self.version}" could not be found in LIBPC, this is likely due to a relocated python installation') |
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class PythonFrameworkDependency(ExtraFrameworkDependency, _PythonDependencyBase): |
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def __init__(self, name: str, environment: 'Environment', |
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kwargs: T.Dict[str, T.Any], installation: 'PythonInstallation'): |
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ExtraFrameworkDependency.__init__(self, name, environment, kwargs) |
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_PythonDependencyBase.__init__(self, installation, kwargs.get('embed', False)) |
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class PythonSystemDependency(SystemDependency, _PythonDependencyBase): |
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def __init__(self, name: str, environment: 'Environment', |
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kwargs: T.Dict[str, T.Any], installation: 'PythonInstallation'): |
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SystemDependency.__init__(self, name, environment, kwargs) |
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_PythonDependencyBase.__init__(self, installation, kwargs.get('embed', False)) |
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if mesonlib.is_windows(): |
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self._find_libpy_windows(environment) |
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else: |
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self._find_libpy(installation, environment) |
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def _find_libpy(self, python_holder: 'PythonInstallation', environment: 'Environment') -> None: |
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if python_holder.is_pypy: |
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if self.major_version == 3: |
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libname = 'pypy3-c' |
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else: |
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libname = 'pypy-c' |
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libdir = os.path.join(self.variables.get('base'), 'bin') |
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libdirs = [libdir] |
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else: |
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libname = f'python{self.version}' |
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if 'DEBUG_EXT' in self.variables: |
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libname += self.variables['DEBUG_EXT'] |
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if 'ABIFLAGS' in self.variables: |
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libname += self.variables['ABIFLAGS'] |
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libdirs = [] |
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largs = self.clib_compiler.find_library(libname, environment, libdirs) |
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if largs is not None: |
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self.link_args = largs |
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self.is_found = largs is not None or not self.link_libpython |
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inc_paths = mesonlib.OrderedSet([ |
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self.variables.get('INCLUDEPY'), |
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self.paths.get('include'), |
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self.paths.get('platinclude')]) |
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self.compile_args += ['-I' + path for path in inc_paths if path] |
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def _get_windows_python_arch(self) -> T.Optional[str]: |
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if self.platform == 'mingw': |
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pycc = self.variables.get('CC') |
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if pycc.startswith('x86_64'): |
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return '64' |
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elif pycc.startswith(('i686', 'i386')): |
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return '32' |
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else: |
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mlog.log(f'MinGW Python built with unknown CC {pycc!r}, please file a bug') |
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return None |
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elif self.platform == 'win32': |
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return '32' |
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elif self.platform in ('win64', 'win-amd64'): |
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return '64' |
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mlog.log(f'Unknown Windows Python platform {self.platform!r}') |
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return None |
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def _get_windows_link_args(self) -> T.Optional[T.List[str]]: |
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if self.platform.startswith('win'): |
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vernum = self.variables.get('py_version_nodot') |
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verdot = self.variables.get('py_version_short') |
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imp_lower = self.variables.get('implementation_lower', 'python') |
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if self.static: |
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libpath = Path('libs') / f'libpython{vernum}.a' |
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else: |
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comp = self.get_compiler() |
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if comp.id == "gcc": |
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if imp_lower == 'pypy' and verdot == '3.8': |
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# The naming changed between 3.8 and 3.9 |
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libpath = Path(f'libpypy3-c.dll') |
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elif imp_lower == 'pypy': |
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libpath = Path(f'libpypy{verdot}-c.dll') |
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else: |
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libpath = Path(f'python{vernum}.dll') |
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else: |
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libpath = Path('libs') / f'python{vernum}.lib' |
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# base_prefix to allow for virtualenvs. |
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lib = Path(self.variables.get('base_prefix')) / libpath |
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elif self.platform == 'mingw': |
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if self.static: |
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libname = self.variables.get('LIBRARY') |
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else: |
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libname = self.variables.get('LDLIBRARY') |
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lib = Path(self.variables.get('LIBDIR')) / libname |
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else: |
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raise mesonlib.MesonBugException( |
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'On a Windows path, but the OS doesn\'t appear to be Windows or MinGW.') |
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if not lib.exists(): |
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mlog.log('Could not find Python3 library {!r}'.format(str(lib))) |
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return None |
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return [str(lib)] |
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def _find_libpy_windows(self, env: 'Environment') -> None: |
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''' |
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Find python3 libraries on Windows and also verify that the arch matches |
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what we are building for. |
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''' |
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pyarch = self._get_windows_python_arch() |
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if pyarch is None: |
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self.is_found = False |
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return |
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arch = detect_cpu_family(env.coredata.compilers.host) |
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if arch == 'x86': |
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arch = '32' |
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elif arch == 'x86_64': |
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arch = '64' |
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else: |
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# We can't cross-compile Python 3 dependencies on Windows yet |
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mlog.log(f'Unknown architecture {arch!r} for', |
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mlog.bold(self.name)) |
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self.is_found = False |
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return |
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# Pyarch ends in '32' or '64' |
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if arch != pyarch: |
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mlog.log('Need', mlog.bold(self.name), f'for {arch}-bit, but found {pyarch}-bit') |
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self.is_found = False |
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return |
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# This can fail if the library is not found |
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largs = self._get_windows_link_args() |
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if largs is None: |
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self.is_found = False |
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return |
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self.link_args = largs |
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# Compile args |
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inc_paths = mesonlib.OrderedSet([ |
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self.variables.get('INCLUDEPY'), |
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self.paths.get('include'), |
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self.paths.get('platinclude')]) |
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self.compile_args += ['-I' + path for path in inc_paths if path] |
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# https://sourceforge.net/p/mingw-w64/mailman/message/30504611/ |
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if pyarch == '64' and self.major_version == 2: |
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self.compile_args += ['-DMS_WIN64'] |
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self.is_found = True |
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def python_factory(env: 'Environment', for_machine: 'MachineChoice', |
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kwargs: T.Dict[str, T.Any], methods: T.List[DependencyMethods], |
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installation: 'PythonInstallation') -> T.List['DependencyGenerator']: |
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# We can't use the factory_methods decorator here, as we need to pass the |
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# extra installation argument |
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embed = kwargs.get('embed', False) |
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candidates: T.List['DependencyGenerator'] = [] |
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pkg_version = installation.variables.get('LDVERSION') or installation.version |
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if DependencyMethods.PKGCONFIG in methods: |
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pkg_libdir = installation.variables.get('LIBPC') |
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pkg_embed = '-embed' if embed and mesonlib.version_compare(installation.version, '>=3.8') else '' |
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pkg_name = f'python-{pkg_version}{pkg_embed}' |
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# If python-X.Y.pc exists in LIBPC, we will try to use it |
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def wrap_in_pythons_pc_dir(name: str, env: 'Environment', kwargs: T.Dict[str, T.Any], |
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installation: 'PythonInstallation') -> 'ExternalDependency': |
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if not pkg_libdir: |
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# there is no LIBPC, so we can't search in it |
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return NotFoundDependency('python', env) |
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old_pkg_libdir = os.environ.pop('PKG_CONFIG_LIBDIR', None) |
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old_pkg_path = os.environ.pop('PKG_CONFIG_PATH', None) |
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os.environ['PKG_CONFIG_LIBDIR'] = pkg_libdir |
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try: |
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return PythonPkgConfigDependency(name, env, kwargs, installation, True) |
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finally: |
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def set_env(name, value): |
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if value is not None: |
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os.environ[name] = value |
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elif name in os.environ: |
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del os.environ[name] |
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set_env('PKG_CONFIG_LIBDIR', old_pkg_libdir) |
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set_env('PKG_CONFIG_PATH', old_pkg_path) |
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candidates.append(functools.partial(wrap_in_pythons_pc_dir, pkg_name, env, kwargs, installation)) |
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# We only need to check both, if a python install has a LIBPC. It might point to the wrong location, |
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# e.g. relocated / cross compilation, but the presence of LIBPC indicates we should definitely look for something. |
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if pkg_libdir is not None: |
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candidates.append(functools.partial(PythonPkgConfigDependency, pkg_name, env, kwargs, installation)) |
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if DependencyMethods.SYSTEM in methods: |
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candidates.append(functools.partial(PythonSystemDependency, 'python', env, kwargs, installation)) |
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if DependencyMethods.EXTRAFRAMEWORK in methods: |
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nkwargs = kwargs.copy() |
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if mesonlib.version_compare(pkg_version, '>= 3'): |
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# There is a python in /System/Library/Frameworks, but that's python 2.x, |
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# Python 3 will always be in /Library |
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nkwargs['paths'] = ['/Library/Frameworks'] |
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candidates.append(functools.partial(PythonFrameworkDependency, 'Python', env, nkwargs, installation)) |
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return candidates |
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INTROSPECT_COMMAND = '''\ |
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import os.path |
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import sysconfig |
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import json |
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import sys |
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import distutils.command.install |
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def get_distutils_paths(scheme=None, prefix=None): |
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import distutils.dist |
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distribution = distutils.dist.Distribution() |
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install_cmd = distribution.get_command_obj('install') |
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if prefix is not None: |
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install_cmd.prefix = prefix |
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if scheme: |
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install_cmd.select_scheme(scheme) |
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install_cmd.finalize_options() |
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return { |
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'data': install_cmd.install_data, |
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'include': os.path.dirname(install_cmd.install_headers), |
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'platlib': install_cmd.install_platlib, |
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'purelib': install_cmd.install_purelib, |
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'scripts': install_cmd.install_scripts, |
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} |
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# On Debian derivatives, the Python interpreter shipped by the distribution uses |
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# a custom install scheme, deb_system, for the system install, and changes the |
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# default scheme to a custom one pointing to /usr/local and replacing |
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# site-packages with dist-packages. |
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# See https://github.com/mesonbuild/meson/issues/8739. |
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# XXX: We should be using sysconfig, but Debian only patches distutils. |
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if 'deb_system' in distutils.command.install.INSTALL_SCHEMES: |
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paths = get_distutils_paths(scheme='deb_system') |
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install_paths = get_distutils_paths(scheme='deb_system', prefix='') |
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else: |
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paths = sysconfig.get_paths() |
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empty_vars = {'base': '', 'platbase': '', 'installed_base': ''} |
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install_paths = sysconfig.get_paths(vars=empty_vars) |
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def links_against_libpython(): |
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from distutils.core import Distribution, Extension |
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cmd = Distribution().get_command_obj('build_ext') |
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cmd.ensure_finalized() |
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return bool(cmd.get_libraries(Extension('dummy', []))) |
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variables = sysconfig.get_config_vars() |
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variables.update({'base_prefix': getattr(sys, 'base_prefix', sys.prefix)}) |
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print(json.dumps({ |
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'variables': variables, |
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'paths': paths, |
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'sysconfig_paths': sysconfig.get_paths(), |
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'install_paths': install_paths, |
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'version': sysconfig.get_python_version(), |
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'platform': sysconfig.get_platform(), |
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'is_pypy': '__pypy__' in sys.builtin_module_names, |
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'is_venv': sys.prefix != variables['base_prefix'], |
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'link_libpython': links_against_libpython(), |
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})) |
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''' |
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class PythonExternalProgram(ExternalProgram): |
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def __init__(self, name: str, command: T.Optional[T.List[str]] = None, |
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ext_prog: T.Optional[ExternalProgram] = None): |
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if ext_prog is None: |
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super().__init__(name, command=command, silent=True) |
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else: |
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self.name = name |
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self.command = ext_prog.command |
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self.path = ext_prog.path |
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# We want strong key values, so we always populate this with bogus data. |
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# Otherwise to make the type checkers happy we'd have to do .get() for |
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# everycall, even though we know that the introspection data will be |
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# complete |
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self.info: 'PythonIntrospectionDict' = { |
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'install_paths': {}, |
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'is_pypy': False, |
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'is_venv': False, |
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'link_libpython': False, |
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'sysconfig_paths': {}, |
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'paths': {}, |
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'platform': 'sentinal', |
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'variables': {}, |
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'version': '0.0', |
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} |
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def _check_version(self, version: str) -> bool: |
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if self.name == 'python2': |
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return mesonlib.version_compare(version, '< 3.0') |
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elif self.name == 'python3': |
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return mesonlib.version_compare(version, '>= 3.0') |
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return True |
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def sanity(self, state: T.Optional['ModuleState'] = None) -> bool: |
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# Sanity check, we expect to have something that at least quacks in tune |
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from tempfile import NamedTemporaryFile |
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with NamedTemporaryFile(suffix='.py', delete=False, mode='w', encoding='utf-8') as tf: |
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tmpfilename = tf.name |
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tf.write(INTROSPECT_COMMAND) |
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cmd = self.get_command() + [tmpfilename] |
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p, stdout, stderr = mesonlib.Popen_safe(cmd) |
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os.unlink(tmpfilename) |
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try: |
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info = json.loads(stdout) |
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except json.JSONDecodeError: |
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info = None |
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mlog.debug('Could not introspect Python (%s): exit code %d' % (str(p.args), p.returncode)) |
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mlog.debug('Program stdout:\n') |
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mlog.debug(stdout) |
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mlog.debug('Program stderr:\n') |
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mlog.debug(stderr) |
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if info is not None and self._check_version(info['version']): |
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variables = info['variables'] |
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info['suffix'] = variables.get('EXT_SUFFIX') or variables.get('SO') or variables.get('.so') |
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self.info = T.cast('PythonIntrospectionDict', info) |
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self.platlib = self._get_path(state, 'platlib') |
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self.purelib = self._get_path(state, 'purelib') |
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return True |
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else: |
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return False |
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def _get_path(self, state: T.Optional['ModuleState'], key: str) -> None: |
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rel_path = self.info['install_paths'][key][1:] |
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if not state: |
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# This happens only from run_project_tests.py |
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return rel_path |
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value = state.get_option(f'{key}dir', module='python') |
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if value: |
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if state.is_user_defined_option('install_env', module='python'): |
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raise mesonlib.MesonException(f'python.{key}dir and python.install_env are mutually exclusive') |
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return value |
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install_env = state.get_option('install_env', module='python') |
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if install_env == 'auto': |
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install_env = 'venv' if self.info['is_venv'] else 'system' |
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if install_env == 'system': |
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rel_path = os.path.join(self.info['variables']['prefix'], rel_path) |
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elif install_env == 'venv': |
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if not self.info['is_venv']: |
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raise mesonlib.MesonException('python.install_env cannot be set to "venv" unless you are in a venv!') |
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# inside a venv, deb_system is *never* active hence info['paths'] may be wrong |
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rel_path = self.info['sysconfig_paths'][key] |
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return rel_path |
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_PURE_KW = KwargInfo('pure', bool, default=True) |
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_SUBDIR_KW = KwargInfo('subdir', str, default='') |
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class PythonInstallation(ExternalProgramHolder): |
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def __init__(self, python: 'PythonExternalProgram', interpreter: 'Interpreter'): |
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ExternalProgramHolder.__init__(self, python, interpreter) |
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info = python.info |
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prefix = self.interpreter.environment.coredata.get_option(mesonlib.OptionKey('prefix')) |
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assert isinstance(prefix, str), 'for mypy' |
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self.variables = info['variables'] |
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self.suffix = info['suffix'] |
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self.paths = info['paths'] |
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self.platlib_install_path = os.path.join(prefix, python.platlib) |
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self.purelib_install_path = os.path.join(prefix, python.purelib) |
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self.version = info['version'] |
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self.platform = info['platform'] |
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self.is_pypy = info['is_pypy'] |
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self.link_libpython = info['link_libpython'] |
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self.methods.update({ |
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'extension_module': self.extension_module_method, |
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'dependency': self.dependency_method, |
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'install_sources': self.install_sources_method, |
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'get_install_dir': self.get_install_dir_method, |
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'language_version': self.language_version_method, |
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'found': self.found_method, |
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'has_path': self.has_path_method, |
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'get_path': self.get_path_method, |
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'has_variable': self.has_variable_method, |
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'get_variable': self.get_variable_method, |
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'path': self.path_method, |
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}) |
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@permittedKwargs(mod_kwargs) |
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def extension_module_method(self, args: T.List['TYPE_var'], kwargs: 'TYPE_kwargs') -> 'SharedModule': |
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if 'install_dir' in kwargs: |
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if 'subdir' in kwargs: |
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raise InvalidArguments('"subdir" and "install_dir" are mutually exclusive') |
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else: |
|
subdir = kwargs.pop('subdir', '') |
|
if not isinstance(subdir, str): |
|
raise InvalidArguments('"subdir" argument must be a string.') |
|
|
|
kwargs['install_dir'] = os.path.join(self.platlib_install_path, subdir) |
|
|
|
# On macOS and some Linux distros (Debian) distutils doesn't link |
|
# extensions against libpython. We call into distutils and mirror its |
|
# behavior. See https://github.com/mesonbuild/meson/issues/4117 |
|
if not self.link_libpython: |
|
new_deps = [] |
|
for dep in mesonlib.extract_as_list(kwargs, 'dependencies'): |
|
if isinstance(dep, _PythonDependencyBase): |
|
dep = dep.get_partial_dependency(compile_args=True) |
|
new_deps.append(dep) |
|
kwargs['dependencies'] = new_deps |
|
|
|
# msys2's python3 has "-cpython-36m.dll", we have to be clever |
|
# FIXME: explain what the specific cleverness is here |
|
split, suffix = self.suffix.rsplit('.', 1) |
|
args[0] += split |
|
|
|
kwargs['name_prefix'] = '' |
|
kwargs['name_suffix'] = suffix |
|
|
|
return self.interpreter.func_shared_module(None, args, kwargs) |
|
|
|
@disablerIfNotFound |
|
@permittedKwargs(permitted_dependency_kwargs | {'embed'}) |
|
@FeatureNewKwargs('python_installation.dependency', '0.53.0', ['embed']) |
|
@noPosargs |
|
def dependency_method(self, args: T.List['TYPE_var'], kwargs: 'TYPE_kwargs') -> 'Dependency': |
|
disabled, required, feature = extract_required_kwarg(kwargs, self.subproject) |
|
# it's theoretically (though not practically) possible for the else clse |
|
# to not bind dep, let's ensure it is. |
|
dep: 'Dependency' = NotFoundDependency('python', self.interpreter.environment) |
|
if disabled: |
|
mlog.log('Dependency', mlog.bold('python'), 'skipped: feature', mlog.bold(feature), 'disabled') |
|
else: |
|
new_kwargs = kwargs.copy() |
|
new_kwargs['required'] = False |
|
methods = process_method_kw({DependencyMethods.PKGCONFIG, DependencyMethods.SYSTEM}, kwargs) |
|
for d in python_factory(self.interpreter.environment, |
|
MachineChoice.BUILD if kwargs.get('native', False) else MachineChoice.HOST, |
|
new_kwargs, methods, self): |
|
dep = d() |
|
if dep.found(): |
|
break |
|
if required and not dep.found(): |
|
raise mesonlib.MesonException('Python dependency not found') |
|
|
|
return dep |
|
|
|
@typed_pos_args('install_data', varargs=(str, mesonlib.File)) |
|
@typed_kwargs('python_installation.install_sources', _PURE_KW, _SUBDIR_KW, |
|
KwargInfo('install_tag', (str, NoneType), since='0.60.0')) |
|
def install_sources_method(self, args: T.Tuple[T.List[T.Union[str, mesonlib.File]]], |
|
kwargs: 'PyInstallKw') -> 'Data': |
|
tag = kwargs['install_tag'] or 'runtime' |
|
return self.interpreter.install_data_impl( |
|
self.interpreter.source_strings_to_files(args[0]), |
|
self._get_install_dir_impl(kwargs['pure'], kwargs['subdir']), |
|
mesonlib.FileMode(), rename=None, tag=tag, install_data_type='python', |
|
install_dir_name=self._get_install_dir_name_impl(kwargs['pure'], kwargs['subdir'])) |
|
|
|
@noPosargs |
|
@typed_kwargs('python_installation.install_dir', _PURE_KW, _SUBDIR_KW) |
|
def get_install_dir_method(self, args: T.List['TYPE_var'], kwargs: 'PyInstallKw') -> str: |
|
return self._get_install_dir_impl(kwargs['pure'], kwargs['subdir']) |
|
|
|
def _get_install_dir_impl(self, pure: bool, subdir: str) -> str: |
|
return os.path.join( |
|
self.purelib_install_path if pure else self.platlib_install_path, subdir) |
|
|
|
def _get_install_dir_name_impl(self, pure: bool, subdir: str) -> str: |
|
return os.path.join('{py_purelib}' if pure else '{py_platlib}', subdir) |
|
|
|
@noPosargs |
|
@noKwargs |
|
def language_version_method(self, args: T.List['TYPE_var'], kwargs: 'TYPE_kwargs') -> str: |
|
return self.version |
|
|
|
@typed_pos_args('python_installation.has_path', str) |
|
@noKwargs |
|
def has_path_method(self, args: T.Tuple[str], kwargs: 'TYPE_kwargs') -> bool: |
|
return args[0] in self.paths |
|
|
|
@typed_pos_args('python_installation.get_path', str, optargs=[object]) |
|
@noKwargs |
|
def get_path_method(self, args: T.Tuple[str, T.Optional['TYPE_var']], kwargs: 'TYPE_kwargs') -> 'TYPE_var': |
|
path_name, fallback = args |
|
try: |
|
return self.paths[path_name] |
|
except KeyError: |
|
if fallback is not None: |
|
return fallback |
|
raise InvalidArguments(f'{path_name} is not a valid path name') |
|
|
|
@typed_pos_args('python_installation.has_variable', str) |
|
@noKwargs |
|
def has_variable_method(self, args: T.Tuple[str], kwargs: 'TYPE_kwargs') -> bool: |
|
return args[0] in self.variables |
|
|
|
@typed_pos_args('python_installation.get_variable', str, optargs=[object]) |
|
@noKwargs |
|
def get_variable_method(self, args: T.Tuple[str, T.Optional['TYPE_var']], kwargs: 'TYPE_kwargs') -> 'TYPE_var': |
|
var_name, fallback = args |
|
try: |
|
return self.variables[var_name] |
|
except KeyError: |
|
if fallback is not None: |
|
return fallback |
|
raise InvalidArguments(f'{var_name} is not a valid variable name') |
|
|
|
@noPosargs |
|
@noKwargs |
|
@FeatureNew('Python module path method', '0.50.0') |
|
def path_method(self, args: T.List['TYPE_var'], kwargs: 'TYPE_kwargs') -> str: |
|
return super().path_method(args, kwargs) |
|
|
|
|
|
class PythonModule(ExtensionModule): |
|
|
|
@FeatureNew('Python Module', '0.46.0') |
|
def __init__(self, interpreter: 'Interpreter') -> None: |
|
super().__init__(interpreter) |
|
self.installations: T.Dict[str, ExternalProgram] = {} |
|
self.methods.update({ |
|
'find_installation': self.find_installation, |
|
}) |
|
|
|
# https://www.python.org/dev/peps/pep-0397/ |
|
@staticmethod |
|
def _get_win_pythonpath(name_or_path: str) -> T.Optional[str]: |
|
if name_or_path not in ['python2', 'python3']: |
|
return None |
|
if not shutil.which('py'): |
|
# program not installed, return without an exception |
|
return None |
|
ver = {'python2': '-2', 'python3': '-3'}[name_or_path] |
|
cmd = ['py', ver, '-c', "import sysconfig; print(sysconfig.get_config_var('BINDIR'))"] |
|
_, stdout, _ = mesonlib.Popen_safe(cmd) |
|
directory = stdout.strip() |
|
if os.path.exists(directory): |
|
return os.path.join(directory, 'python') |
|
else: |
|
return None |
|
|
|
def _find_installation_impl(self, state: 'ModuleState', display_name: str, name_or_path: str, required: bool) -> ExternalProgram: |
|
if not name_or_path: |
|
python = PythonExternalProgram('python3', mesonlib.python_command) |
|
else: |
|
tmp_python = ExternalProgram.from_entry(display_name, name_or_path) |
|
python = PythonExternalProgram(display_name, ext_prog=tmp_python) |
|
|
|
if not python.found() and mesonlib.is_windows(): |
|
pythonpath = self._get_win_pythonpath(name_or_path) |
|
if pythonpath is not None: |
|
name_or_path = pythonpath |
|
python = PythonExternalProgram(name_or_path) |
|
|
|
# Last ditch effort, python2 or python3 can be named python |
|
# on various platforms, let's not give up just yet, if an executable |
|
# named python is available and has a compatible version, let's use |
|
# it |
|
if not python.found() and name_or_path in ['python2', 'python3']: |
|
python = PythonExternalProgram('python') |
|
|
|
if python.found(): |
|
if python.sanity(state): |
|
return python |
|
else: |
|
sanitymsg = f'{python} is not a valid python or it is missing distutils' |
|
if required: |
|
raise mesonlib.MesonException(sanitymsg) |
|
else: |
|
mlog.warning(sanitymsg, location=state.current_node) |
|
|
|
return NonExistingExternalProgram() |
|
|
|
@disablerIfNotFound |
|
@typed_pos_args('python.find_installation', optargs=[str]) |
|
@typed_kwargs( |
|
'python.find_installation', |
|
KwargInfo('required', (bool, UserFeatureOption), default=True), |
|
KwargInfo('disabler', bool, default=False, since='0.49.0'), |
|
KwargInfo('modules', ContainerTypeInfo(list, str), listify=True, default=[], since='0.51.0'), |
|
) |
|
def find_installation(self, state: 'ModuleState', args: T.Tuple[T.Optional[str]], |
|
kwargs: 'FindInstallationKw') -> ExternalProgram: |
|
feature_check = FeatureNew('Passing "feature" option to find_installation', '0.48.0') |
|
disabled, required, feature = extract_required_kwarg(kwargs, state.subproject, feature_check) |
|
|
|
# FIXME: this code is *full* of sharp corners. It assumes that it's |
|
# going to get a string value (or now a list of length 1), of `python2` |
|
# or `python3` which is completely nonsense. On windows the value could |
|
# easily be `['py', '-3']`, or `['py', '-3.7']` to get a very specific |
|
# version of python. On Linux we might want a python that's not in |
|
# $PATH, or that uses a wrapper of some kind. |
|
np: T.List[str] = state.environment.lookup_binary_entry(MachineChoice.HOST, 'python') or [] |
|
fallback = args[0] |
|
display_name = fallback or 'python' |
|
if not np and fallback is not None: |
|
np = [fallback] |
|
name_or_path = np[0] if np else None |
|
|
|
if disabled: |
|
mlog.log('Program', name_or_path or 'python', 'found:', mlog.red('NO'), '(disabled by:', mlog.bold(feature), ')') |
|
return NonExistingExternalProgram() |
|
|
|
python = self.installations.get(name_or_path) |
|
if not python: |
|
python = self._find_installation_impl(state, display_name, name_or_path, required) |
|
self.installations[name_or_path] = python |
|
|
|
want_modules = kwargs['modules'] |
|
found_modules: T.List[str] = [] |
|
missing_modules: T.List[str] = [] |
|
if python.found() and want_modules: |
|
# Python 3.8.x or later require add_dll_directory() to be called on Windows if |
|
# the needed modules require external DLLs that are not bundled with the modules. |
|
# Simplify things by calling add_dll_directory() on the paths in %PATH% |
|
add_paths_cmd = '' |
|
if hasattr(os, 'add_dll_directory'): |
|
add_paths_cmds = [] |
|
paths = os.environ['PATH'].split(os.pathsep) |
|
for path in paths: |
|
if path != '' and os.path.isdir(path): |
|
add_paths_cmds.append(f'os.add_dll_directory({path!r})') |
|
add_paths_cmd = 'import os;' + ';'.join(reversed(add_paths_cmds)) + ';' |
|
|
|
for mod in want_modules: |
|
p, *_ = mesonlib.Popen_safe( |
|
python.command + |
|
['-c', f'{add_paths_cmd}import {mod}']) |
|
if p.returncode != 0: |
|
missing_modules.append(mod) |
|
else: |
|
found_modules.append(mod) |
|
|
|
msg: T.List['mlog.TV_Loggable'] = ['Program', python.name] |
|
if want_modules: |
|
msg.append('({})'.format(', '.join(want_modules))) |
|
msg.append('found:') |
|
if python.found() and not missing_modules: |
|
msg.extend([mlog.green('YES'), '({})'.format(' '.join(python.command))]) |
|
else: |
|
msg.append(mlog.red('NO')) |
|
if found_modules: |
|
msg.append('modules:') |
|
msg.append(', '.join(found_modules)) |
|
|
|
mlog.log(*msg) |
|
|
|
if not python.found(): |
|
if required: |
|
raise mesonlib.MesonException('{} not found'.format(name_or_path or 'python')) |
|
return NonExistingExternalProgram() |
|
elif missing_modules: |
|
if required: |
|
raise mesonlib.MesonException('{} is missing modules: {}'.format(name_or_path or 'python', ', '.join(missing_modules))) |
|
return NonExistingExternalProgram() |
|
else: |
|
return python |
|
|
|
raise mesonlib.MesonBugException('Unreachable code was reached (PythonModule.find_installation).') |
|
|
|
|
|
def initialize(interpreter: 'Interpreter') -> PythonModule: |
|
mod = PythonModule(interpreter) |
|
mod.interpreter.append_holder_map(PythonExternalProgram, PythonInstallation) |
|
return mod
|
|
|