mirror of
https://github.com/ValveSoftware/halflife.git
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501 lines
23 KiB
Python
501 lines
23 KiB
Python
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# Copyright 2013-2021 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 __future__ import annotations
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from pathlib import Path
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from .base import ExternalDependency, DependencyException, sort_libpaths, DependencyTypeName
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from ..mesonlib import OptionKey, OrderedSet, PerMachine, Popen_safe, Popen_safe_logged
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from ..programs import find_external_program, ExternalProgram
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from .. import mlog
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from pathlib import PurePath
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import re
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import os
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import shlex
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import typing as T
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if T.TYPE_CHECKING:
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from ..environment import Environment
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from ..mesonlib import MachineChoice
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from ..utils.core import EnvironOrDict
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from .._typing import ImmutableListProtocol
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from ..build import EnvironmentVariables
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class PkgConfigDependency(ExternalDependency):
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# The class's copy of the pkg-config path. Avoids having to search for it
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# multiple times in the same Meson invocation.
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class_pkgbin: PerMachine[T.Union[None, bool, ExternalProgram]] = PerMachine(None, None)
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# We cache all pkg-config subprocess invocations to avoid redundant calls
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pkgbin_cache: T.Dict[
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T.Tuple[ExternalProgram, T.Tuple[str, ...], T.FrozenSet[T.Tuple[str, str]]],
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T.Tuple[int, str, str]
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] = {}
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def __init__(self, name: str, environment: 'Environment', kwargs: T.Dict[str, T.Any], language: T.Optional[str] = None) -> None:
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super().__init__(DependencyTypeName('pkgconfig'), environment, kwargs, language=language)
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self.name = name
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self.is_libtool = False
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# Store a copy of the pkg-config path on the object itself so it is
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# stored in the pickled coredata and recovered.
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self.pkgbin = self._detect_pkgbin(self.silent, self.env, self.for_machine)
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if self.pkgbin is False:
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self.pkgbin = None
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msg = f'Pkg-config binary for machine {self.for_machine} not found. Giving up.'
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if self.required:
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raise DependencyException(msg)
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else:
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mlog.debug(msg)
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return
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assert isinstance(self.pkgbin, ExternalProgram)
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mlog.debug('Determining dependency {!r} with pkg-config executable '
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'{!r}'.format(name, self.pkgbin.get_path()))
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ret, self.version, _ = self._call_pkgbin(['--modversion', name])
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if ret != 0:
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return
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self.is_found = True
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try:
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# Fetch cargs to be used while using this dependency
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self._set_cargs()
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# Fetch the libraries and library paths needed for using this
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self._set_libs()
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except DependencyException as e:
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mlog.debug(f"pkg-config error with '{name}': {e}")
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if self.required:
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raise
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else:
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self.compile_args = []
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self.link_args = []
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self.is_found = False
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self.reason = e
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def __repr__(self) -> str:
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s = '<{0} {1}: {2} {3}>'
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return s.format(self.__class__.__name__, self.name, self.is_found,
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self.version_reqs)
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@classmethod
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def _detect_pkgbin(cls, silent: bool, env: Environment,
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for_machine: MachineChoice) -> T.Union[None, bool, ExternalProgram]:
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# Only search for pkg-config for each machine the first time and store
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# the result in the class definition
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if cls.class_pkgbin[for_machine] is False:
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mlog.debug(f'Pkg-config binary for {for_machine} is cached as not found.')
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elif cls.class_pkgbin[for_machine] is not None:
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mlog.debug(f'Pkg-config binary for {for_machine} is cached.')
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else:
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assert cls.class_pkgbin[for_machine] is None, 'for mypy'
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mlog.debug(f'Pkg-config binary for {for_machine} is not cached.')
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for potential_pkgbin in find_external_program(
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env, for_machine, 'pkgconfig', 'Pkg-config',
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env.default_pkgconfig, allow_default_for_cross=False):
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version_if_ok = cls.check_pkgconfig(env, potential_pkgbin)
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if not version_if_ok:
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continue
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if not silent:
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mlog.log('Found pkg-config:', mlog.bold(potential_pkgbin.get_path()),
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f'({version_if_ok})')
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cls.class_pkgbin[for_machine] = potential_pkgbin
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break
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else:
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if not silent:
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mlog.log('Found Pkg-config:', mlog.red('NO'))
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# Set to False instead of None to signify that we've already
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# searched for it and not found it
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cls.class_pkgbin[for_machine] = False
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return cls.class_pkgbin[for_machine]
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def _call_pkgbin_real(self, args: T.List[str], env: T.Dict[str, str]) -> T.Tuple[int, str, str]:
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assert isinstance(self.pkgbin, ExternalProgram)
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cmd = self.pkgbin.get_command() + args
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p, out, err = Popen_safe_logged(cmd, env=env)
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return p.returncode, out.strip(), err.strip()
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@staticmethod
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def get_env(environment: 'Environment', for_machine: MachineChoice,
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uninstalled: bool = False) -> 'EnvironmentVariables':
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from ..build import EnvironmentVariables
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env = EnvironmentVariables()
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key = OptionKey('pkg_config_path', machine=for_machine)
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extra_paths: T.List[str] = environment.coredata.options[key].value[:]
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if uninstalled:
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uninstalled_path = Path(environment.get_build_dir(), 'meson-uninstalled').as_posix()
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if uninstalled_path not in extra_paths:
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extra_paths.append(uninstalled_path)
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env.set('PKG_CONFIG_PATH', extra_paths)
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sysroot = environment.properties[for_machine].get_sys_root()
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if sysroot:
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env.set('PKG_CONFIG_SYSROOT_DIR', [sysroot])
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pkg_config_libdir_prop = environment.properties[for_machine].get_pkg_config_libdir()
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if pkg_config_libdir_prop:
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env.set('PKG_CONFIG_LIBDIR', pkg_config_libdir_prop)
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return env
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@staticmethod
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def setup_env(env: EnvironOrDict, environment: 'Environment', for_machine: MachineChoice,
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uninstalled: bool = False) -> T.Dict[str, str]:
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envvars = PkgConfigDependency.get_env(environment, for_machine, uninstalled)
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env = envvars.get_env(env)
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# Dump all PKG_CONFIG environment variables
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for key, value in env.items():
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if key.startswith('PKG_'):
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mlog.debug(f'env[{key}]: {value}')
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return env
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def _call_pkgbin(self, args: T.List[str], env: T.Optional[EnvironOrDict] = None) -> T.Tuple[int, str, str]:
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assert isinstance(self.pkgbin, ExternalProgram)
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env = env or os.environ
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env = PkgConfigDependency.setup_env(env, self.env, self.for_machine)
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fenv = frozenset(env.items())
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targs = tuple(args)
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cache = PkgConfigDependency.pkgbin_cache
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if (self.pkgbin, targs, fenv) not in cache:
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cache[(self.pkgbin, targs, fenv)] = self._call_pkgbin_real(args, env)
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return cache[(self.pkgbin, targs, fenv)]
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def _convert_mingw_paths(self, args: T.List[str]) -> T.List[str]:
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'''
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Both MSVC and native Python on Windows cannot handle MinGW-esque /c/foo
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paths so convert them to C:/foo. We cannot resolve other paths starting
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with / like /home/foo so leave them as-is so that the user gets an
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error/warning from the compiler/linker.
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'''
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if not self.env.machines.build.is_windows():
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return args
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converted = []
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for arg in args:
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pargs: T.Tuple[str, ...] = tuple()
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# Library search path
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if arg.startswith('-L/'):
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pargs = PurePath(arg[2:]).parts
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tmpl = '-L{}:/{}'
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elif arg.startswith('-I/'):
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pargs = PurePath(arg[2:]).parts
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tmpl = '-I{}:/{}'
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# Full path to library or .la file
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elif arg.startswith('/'):
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pargs = PurePath(arg).parts
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tmpl = '{}:/{}'
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elif arg.startswith(('-L', '-I')) or (len(arg) > 2 and arg[1] == ':'):
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# clean out improper '\\ ' as comes from some Windows pkg-config files
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arg = arg.replace('\\ ', ' ')
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if len(pargs) > 1 and len(pargs[1]) == 1:
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arg = tmpl.format(pargs[1], '/'.join(pargs[2:]))
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converted.append(arg)
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return converted
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def _split_args(self, cmd: str) -> T.List[str]:
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# pkg-config paths follow Unix conventions, even on Windows; split the
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# output using shlex.split rather than mesonlib.split_args
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return shlex.split(cmd)
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def _set_cargs(self) -> None:
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env = None
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if self.language == 'fortran':
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# gfortran doesn't appear to look in system paths for INCLUDE files,
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# so don't allow pkg-config to suppress -I flags for system paths
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env = os.environ.copy()
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env['PKG_CONFIG_ALLOW_SYSTEM_CFLAGS'] = '1'
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ret, out, err = self._call_pkgbin(['--cflags', self.name], env=env)
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if ret != 0:
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raise DependencyException(f'Could not generate cargs for {self.name}:\n{err}\n')
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self.compile_args = self._convert_mingw_paths(self._split_args(out))
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def _search_libs(self, out: str, out_raw: str) -> T.Tuple[T.List[str], T.List[str]]:
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'''
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@out: PKG_CONFIG_ALLOW_SYSTEM_LIBS=1 pkg-config --libs
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@out_raw: pkg-config --libs
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We always look for the file ourselves instead of depending on the
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compiler to find it with -lfoo or foo.lib (if possible) because:
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1. We want to be able to select static or shared
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2. We need the full path of the library to calculate RPATH values
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3. De-dup of libraries is easier when we have absolute paths
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Libraries that are provided by the toolchain or are not found by
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find_library() will be added with -L -l pairs.
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'''
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# Library paths should be safe to de-dup
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#
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# First, figure out what library paths to use. Originally, we were
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# doing this as part of the loop, but due to differences in the order
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# of -L values between pkg-config and pkgconf, we need to do that as
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# a separate step. See:
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# https://github.com/mesonbuild/meson/issues/3951
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# https://github.com/mesonbuild/meson/issues/4023
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#
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# Separate system and prefix paths, and ensure that prefix paths are
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# always searched first.
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prefix_libpaths: OrderedSet[str] = OrderedSet()
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# We also store this raw_link_args on the object later
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raw_link_args = self._convert_mingw_paths(self._split_args(out_raw))
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for arg in raw_link_args:
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if arg.startswith('-L') and not arg.startswith(('-L-l', '-L-L')):
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path = arg[2:]
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if not os.path.isabs(path):
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# Resolve the path as a compiler in the build directory would
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path = os.path.join(self.env.get_build_dir(), path)
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prefix_libpaths.add(path)
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# Library paths are not always ordered in a meaningful way
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#
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# Instead of relying on pkg-config or pkgconf to provide -L flags in a
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# specific order, we reorder library paths ourselves, according to th
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# order specified in PKG_CONFIG_PATH. See:
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# https://github.com/mesonbuild/meson/issues/4271
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#
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# Only prefix_libpaths are reordered here because there should not be
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# too many system_libpaths to cause library version issues.
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pkg_config_path: T.List[str] = self.env.coredata.options[OptionKey('pkg_config_path', machine=self.for_machine)].value
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pkg_config_path = self._convert_mingw_paths(pkg_config_path)
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prefix_libpaths = OrderedSet(sort_libpaths(list(prefix_libpaths), pkg_config_path))
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system_libpaths: OrderedSet[str] = OrderedSet()
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full_args = self._convert_mingw_paths(self._split_args(out))
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for arg in full_args:
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if arg.startswith(('-L-l', '-L-L')):
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# These are D language arguments, not library paths
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continue
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if arg.startswith('-L') and arg[2:] not in prefix_libpaths:
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system_libpaths.add(arg[2:])
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# Use this re-ordered path list for library resolution
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libpaths = list(prefix_libpaths) + list(system_libpaths)
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# Track -lfoo libraries to avoid duplicate work
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libs_found: OrderedSet[str] = OrderedSet()
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# Track not-found libraries to know whether to add library paths
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libs_notfound = []
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# Generate link arguments for this library
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link_args = []
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for lib in full_args:
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if lib.startswith(('-L-l', '-L-L')):
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# These are D language arguments, add them as-is
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pass
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elif lib.startswith('-L'):
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# We already handled library paths above
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continue
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elif lib.startswith('-l:'):
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# see: https://stackoverflow.com/questions/48532868/gcc-library-option-with-a-colon-llibevent-a
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# also : See the documentation of -lnamespec | --library=namespec in the linker manual
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# https://sourceware.org/binutils/docs-2.18/ld/Options.html
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# Don't resolve the same -l:libfoo.a argument again
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if lib in libs_found:
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continue
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libfilename = lib[3:]
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foundname = None
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for libdir in libpaths:
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target = os.path.join(libdir, libfilename)
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if os.path.exists(target):
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foundname = target
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break
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if foundname is None:
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if lib in libs_notfound:
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continue
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else:
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mlog.warning('Library {!r} not found for dependency {!r}, may '
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'not be successfully linked'.format(libfilename, self.name))
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libs_notfound.append(lib)
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else:
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lib = foundname
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elif lib.startswith('-l'):
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# Don't resolve the same -lfoo argument again
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if lib in libs_found:
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continue
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if self.clib_compiler:
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args = self.clib_compiler.find_library(lib[2:], self.env,
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libpaths, self.libtype,
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lib_prefix_warning=False)
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# If the project only uses a non-clib language such as D, Rust,
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# C#, Python, etc, all we can do is limp along by adding the
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# arguments as-is and then adding the libpaths at the end.
|
||
|
|
else:
|
||
|
|
args = None
|
||
|
|
if args is not None:
|
||
|
|
libs_found.add(lib)
|
||
|
|
# Replace -l arg with full path to library if available
|
||
|
|
# else, library is either to be ignored, or is provided by
|
||
|
|
# the compiler, can't be resolved, and should be used as-is
|
||
|
|
if args:
|
||
|
|
if not args[0].startswith('-l'):
|
||
|
|
lib = args[0]
|
||
|
|
else:
|
||
|
|
continue
|
||
|
|
else:
|
||
|
|
# Library wasn't found, maybe we're looking in the wrong
|
||
|
|
# places or the library will be provided with LDFLAGS or
|
||
|
|
# LIBRARY_PATH from the environment (on macOS), and many
|
||
|
|
# other edge cases that we can't account for.
|
||
|
|
#
|
||
|
|
# Add all -L paths and use it as -lfoo
|
||
|
|
if lib in libs_notfound:
|
||
|
|
continue
|
||
|
|
if self.static:
|
||
|
|
mlog.warning('Static library {!r} not found for dependency {!r}, may '
|
||
|
|
'not be statically linked'.format(lib[2:], self.name))
|
||
|
|
libs_notfound.append(lib)
|
||
|
|
elif lib.endswith(".la"):
|
||
|
|
shared_libname = self.extract_libtool_shlib(lib)
|
||
|
|
shared_lib = os.path.join(os.path.dirname(lib), shared_libname)
|
||
|
|
if not os.path.exists(shared_lib):
|
||
|
|
shared_lib = os.path.join(os.path.dirname(lib), ".libs", shared_libname)
|
||
|
|
|
||
|
|
if not os.path.exists(shared_lib):
|
||
|
|
raise DependencyException(f'Got a libtools specific "{lib}" dependencies'
|
||
|
|
'but we could not compute the actual shared'
|
||
|
|
'library path')
|
||
|
|
self.is_libtool = True
|
||
|
|
lib = shared_lib
|
||
|
|
if lib in link_args:
|
||
|
|
continue
|
||
|
|
link_args.append(lib)
|
||
|
|
# Add all -Lbar args if we have -lfoo args in link_args
|
||
|
|
if libs_notfound:
|
||
|
|
# Order of -L flags doesn't matter with ld, but it might with other
|
||
|
|
# linkers such as MSVC, so prepend them.
|
||
|
|
link_args = ['-L' + lp for lp in prefix_libpaths] + link_args
|
||
|
|
return link_args, raw_link_args
|
||
|
|
|
||
|
|
def _set_libs(self) -> None:
|
||
|
|
env = None
|
||
|
|
libcmd = ['--libs']
|
||
|
|
|
||
|
|
if self.static:
|
||
|
|
libcmd.append('--static')
|
||
|
|
|
||
|
|
libcmd.append(self.name)
|
||
|
|
|
||
|
|
# Force pkg-config to output -L fields even if they are system
|
||
|
|
# paths so we can do manual searching with cc.find_library() later.
|
||
|
|
env = os.environ.copy()
|
||
|
|
env['PKG_CONFIG_ALLOW_SYSTEM_LIBS'] = '1'
|
||
|
|
ret, out, err = self._call_pkgbin(libcmd, env=env)
|
||
|
|
if ret != 0:
|
||
|
|
raise DependencyException(f'Could not generate libs for {self.name}:\n{err}\n')
|
||
|
|
# Also get the 'raw' output without -Lfoo system paths for adding -L
|
||
|
|
# args with -lfoo when a library can't be found, and also in
|
||
|
|
# gnome.generate_gir + gnome.gtkdoc which need -L -l arguments.
|
||
|
|
ret, out_raw, err_raw = self._call_pkgbin(libcmd)
|
||
|
|
if ret != 0:
|
||
|
|
raise DependencyException(f'Could not generate libs for {self.name}:\n\n{out_raw}')
|
||
|
|
self.link_args, self.raw_link_args = self._search_libs(out, out_raw)
|
||
|
|
|
||
|
|
def get_pkgconfig_variable(self, variable_name: str,
|
||
|
|
define_variable: 'ImmutableListProtocol[str]',
|
||
|
|
default: T.Optional[str]) -> str:
|
||
|
|
options = ['--variable=' + variable_name, self.name]
|
||
|
|
|
||
|
|
if define_variable:
|
||
|
|
options = ['--define-variable=' + '='.join(define_variable)] + options
|
||
|
|
|
||
|
|
ret, out, err = self._call_pkgbin(options)
|
||
|
|
variable = ''
|
||
|
|
if ret != 0:
|
||
|
|
if self.required:
|
||
|
|
raise DependencyException(f'dependency {self.name} not found:\n{err}\n')
|
||
|
|
else:
|
||
|
|
variable = out.strip()
|
||
|
|
|
||
|
|
# pkg-config doesn't distinguish between empty and nonexistent variables
|
||
|
|
# use the variable list to check for variable existence
|
||
|
|
if not variable:
|
||
|
|
ret, out, _ = self._call_pkgbin(['--print-variables', self.name])
|
||
|
|
if not re.search(r'^' + variable_name + r'$', out, re.MULTILINE):
|
||
|
|
if default is not None:
|
||
|
|
variable = default
|
||
|
|
else:
|
||
|
|
mlog.warning(f"pkgconfig variable '{variable_name}' not defined for dependency {self.name}.")
|
||
|
|
|
||
|
|
mlog.debug(f'Got pkgconfig variable {variable_name} : {variable}')
|
||
|
|
return variable
|
||
|
|
|
||
|
|
@staticmethod
|
||
|
|
def check_pkgconfig(env: Environment, pkgbin: ExternalProgram) -> T.Optional[str]:
|
||
|
|
if not pkgbin.found():
|
||
|
|
mlog.log(f'Did not find pkg-config by name {pkgbin.name!r}')
|
||
|
|
return None
|
||
|
|
command_as_string = ' '.join(pkgbin.get_command())
|
||
|
|
try:
|
||
|
|
helptext = Popen_safe(pkgbin.get_command() + ['--help'])[1]
|
||
|
|
if 'Pure-Perl' in helptext:
|
||
|
|
mlog.log(f'found pkg-config {command_as_string!r} but it is Strawberry Perl and thus broken. Ignoring...')
|
||
|
|
return None
|
||
|
|
p, out = Popen_safe(pkgbin.get_command() + ['--version'])[0:2]
|
||
|
|
if p.returncode != 0:
|
||
|
|
mlog.warning(f'Found pkg-config {command_as_string!r} but it failed when run')
|
||
|
|
return None
|
||
|
|
except FileNotFoundError:
|
||
|
|
mlog.warning(f'We thought we found pkg-config {command_as_string!r} but now it\'s not there. How odd!')
|
||
|
|
return None
|
||
|
|
except PermissionError:
|
||
|
|
msg = f'Found pkg-config {command_as_string!r} but didn\'t have permissions to run it.'
|
||
|
|
if not env.machines.build.is_windows():
|
||
|
|
msg += '\n\nOn Unix-like systems this is often caused by scripts that are not executable.'
|
||
|
|
mlog.warning(msg)
|
||
|
|
return None
|
||
|
|
return out.strip()
|
||
|
|
|
||
|
|
def extract_field(self, la_file: str, fieldname: str) -> T.Optional[str]:
|
||
|
|
with open(la_file, encoding='utf-8') as f:
|
||
|
|
for line in f:
|
||
|
|
arr = line.strip().split('=')
|
||
|
|
if arr[0] == fieldname:
|
||
|
|
return arr[1][1:-1]
|
||
|
|
return None
|
||
|
|
|
||
|
|
def extract_dlname_field(self, la_file: str) -> T.Optional[str]:
|
||
|
|
return self.extract_field(la_file, 'dlname')
|
||
|
|
|
||
|
|
def extract_libdir_field(self, la_file: str) -> T.Optional[str]:
|
||
|
|
return self.extract_field(la_file, 'libdir')
|
||
|
|
|
||
|
|
def extract_libtool_shlib(self, la_file: str) -> T.Optional[str]:
|
||
|
|
'''
|
||
|
|
Returns the path to the shared library
|
||
|
|
corresponding to this .la file
|
||
|
|
'''
|
||
|
|
dlname = self.extract_dlname_field(la_file)
|
||
|
|
if dlname is None:
|
||
|
|
return None
|
||
|
|
|
||
|
|
# Darwin uses absolute paths where possible; since the libtool files never
|
||
|
|
# contain absolute paths, use the libdir field
|
||
|
|
if self.env.machines[self.for_machine].is_darwin():
|
||
|
|
dlbasename = os.path.basename(dlname)
|
||
|
|
libdir = self.extract_libdir_field(la_file)
|
||
|
|
if libdir is None:
|
||
|
|
return dlbasename
|
||
|
|
return os.path.join(libdir, dlbasename)
|
||
|
|
# From the comments in extract_libtool(), older libtools had
|
||
|
|
# a path rather than the raw dlname
|
||
|
|
return os.path.basename(dlname)
|
||
|
|
|
||
|
|
@staticmethod
|
||
|
|
def log_tried() -> str:
|
||
|
|
return 'pkgconfig'
|
||
|
|
|
||
|
|
def get_variable(self, *, cmake: T.Optional[str] = None, pkgconfig: T.Optional[str] = None,
|
||
|
|
configtool: T.Optional[str] = None, internal: T.Optional[str] = None,
|
||
|
|
default_value: T.Optional[str] = None,
|
||
|
|
pkgconfig_define: T.Optional[T.List[str]] = None) -> str:
|
||
|
|
if pkgconfig:
|
||
|
|
try:
|
||
|
|
return self.get_pkgconfig_variable(pkgconfig, pkgconfig_define or [], default_value)
|
||
|
|
except DependencyException:
|
||
|
|
pass
|
||
|
|
if default_value is not None:
|
||
|
|
return default_value
|
||
|
|
raise DependencyException(f'Could not get pkg-config variable and no default provided for {self!r}')
|