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642 lines
25 KiB
642 lines
25 KiB
# Copyright 2013-2017 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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# This file contains the detection logic for external dependencies. |
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# Custom logic for several other packages are in separate files. |
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import os |
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import shutil |
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import stat |
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import sys |
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from enum import Enum |
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from .. import mlog |
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from .. import mesonlib |
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from ..mesonlib import MesonException, Popen_safe, version_compare_many, listify |
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# These must be defined in this file to avoid cyclical references. |
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packages = {} |
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_packages_accept_language = set() |
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class DependencyException(MesonException): |
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'''Exceptions raised while trying to find dependencies''' |
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class DependencyMethods(Enum): |
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# Auto means to use whatever dependency checking mechanisms in whatever order meson thinks is best. |
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AUTO = 'auto' |
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PKGCONFIG = 'pkg-config' |
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QMAKE = 'qmake' |
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# Just specify the standard link arguments, assuming the operating system provides the library. |
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SYSTEM = 'system' |
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# Detect using sdl2-config |
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SDLCONFIG = 'sdlconfig' |
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# Detect using pcap-config |
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PCAPCONFIG = 'pcap-config' |
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# Detect using cups-config |
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CUPSCONFIG = 'cups-config' |
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# This is only supported on OSX - search the frameworks directory by name. |
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EXTRAFRAMEWORK = 'extraframework' |
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# Detect using the sysconfig module. |
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SYSCONFIG = 'sysconfig' |
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class Dependency: |
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def __init__(self, type_name, kwargs): |
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self.name = "null" |
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self.version = 'none' |
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self.language = None # None means C-like |
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self.is_found = False |
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self.type_name = type_name |
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self.compile_args = [] |
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self.link_args = [] |
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self.sources = [] |
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method = kwargs.get('method', 'auto') |
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if method not in [e.value for e in DependencyMethods]: |
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raise DependencyException('method {!r} is invalid'.format(method)) |
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method = DependencyMethods(method) |
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# Set the detection method. If the method is set to auto, use any available method. |
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# If method is set to a specific string, allow only that detection method. |
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if method == DependencyMethods.AUTO: |
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self.methods = self.get_methods() |
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elif method in self.get_methods(): |
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self.methods = [method] |
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else: |
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raise DependencyException( |
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'Unsupported detection method: {}, allowed methods are {}'.format( |
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method.value, |
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mlog.format_list(map(lambda x: x.value, [DependencyMethods.AUTO] + self.get_methods())))) |
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def __repr__(self): |
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s = '<{0} {1}: {2}>' |
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return s.format(self.__class__.__name__, self.name, self.is_found) |
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def get_compile_args(self): |
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return self.compile_args |
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def get_link_args(self): |
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return self.link_args |
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def found(self): |
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return self.is_found |
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def get_sources(self): |
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"""Source files that need to be added to the target. |
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As an example, gtest-all.cc when using GTest.""" |
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return self.sources |
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def get_methods(self): |
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return [DependencyMethods.AUTO] |
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def get_name(self): |
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return self.name |
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def get_version(self): |
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return self.version |
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def get_exe_args(self, compiler): |
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return [] |
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def need_threads(self): |
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return False |
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def get_pkgconfig_variable(self, variable_name): |
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raise NotImplementedError('{!r} is not a pkgconfig dependency'.format(self.name)) |
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class InternalDependency(Dependency): |
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def __init__(self, version, incdirs, compile_args, link_args, libraries, sources, ext_deps): |
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super().__init__('internal', {}) |
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self.version = version |
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self.is_found = True |
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self.include_directories = incdirs |
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self.compile_args = compile_args |
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self.link_args = link_args |
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self.libraries = libraries |
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self.sources = sources |
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self.ext_deps = ext_deps |
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class ExternalDependency(Dependency): |
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def __init__(self, type_name, environment, language, kwargs): |
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super().__init__(type_name, kwargs) |
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self.env = environment |
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self.name = type_name # default |
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self.is_found = False |
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self.language = language |
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if language and language not in self.env.coredata.compilers: |
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m = self.name.capitalize() + ' requires a {} compiler' |
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raise DependencyException(m.format(language.capitalize())) |
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self.version_reqs = kwargs.get('version', None) |
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self.required = kwargs.get('required', True) |
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self.silent = kwargs.get('silent', False) |
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self.static = kwargs.get('static', False) |
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if not isinstance(self.static, bool): |
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raise DependencyException('Static keyword must be boolean') |
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# Is this dependency for cross-compilation? |
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if 'native' in kwargs and self.env.is_cross_build(): |
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self.want_cross = not kwargs['native'] |
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else: |
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self.want_cross = self.env.is_cross_build() |
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# Set the compiler that will be used by this dependency |
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# This is only used for configuration checks |
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if self.want_cross: |
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compilers = self.env.coredata.cross_compilers |
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else: |
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compilers = self.env.coredata.compilers |
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self.compiler = compilers.get(self.language or 'c', None) |
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def get_compiler(self): |
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return self.compiler |
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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 = None |
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def __init__(self, name, environment, kwargs): |
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super().__init__('pkgconfig', environment, None, kwargs) |
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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 = None |
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# When finding dependencies for cross-compiling, we don't care about |
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# the 'native' pkg-config |
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if self.want_cross: |
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if 'pkgconfig' not in environment.cross_info.config['binaries']: |
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if self.required: |
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raise DependencyException('Pkg-config binary missing from cross file') |
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else: |
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pkgname = environment.cross_info.config['binaries']['pkgconfig'] |
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potential_pkgbin = ExternalProgram(pkgname, silent=True) |
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if potential_pkgbin.found(): |
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# FIXME, we should store all pkg-configs in ExternalPrograms. |
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# However that is too destabilizing a change to do just before release. |
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self.pkgbin = potential_pkgbin.get_command()[0] |
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PkgConfigDependency.class_pkgbin = self.pkgbin |
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else: |
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mlog.debug('Cross pkg-config %s not found.' % potential_pkgbin.name) |
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# Only search for the native pkg-config the first time and |
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# store the result in the class definition |
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elif PkgConfigDependency.class_pkgbin is None: |
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self.pkgbin = self.check_pkgconfig() |
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PkgConfigDependency.class_pkgbin = self.pkgbin |
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else: |
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self.pkgbin = PkgConfigDependency.class_pkgbin |
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if not self.pkgbin: |
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if self.required: |
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raise DependencyException('Pkg-config not found.') |
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return |
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if self.want_cross: |
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self.type_string = 'Cross' |
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else: |
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self.type_string = 'Native' |
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mlog.debug('Determining dependency {!r} with pkg-config executable ' |
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'{!r}'.format(name, self.pkgbin)) |
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ret, self.version = self._call_pkgbin(['--modversion', name]) |
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if ret != 0: |
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if self.required: |
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raise DependencyException('{} dependency {!r} not found' |
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''.format(self.type_string, name)) |
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return |
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found_msg = [self.type_string + ' dependency', mlog.bold(name), 'found:'] |
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if self.version_reqs is None: |
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self.is_found = True |
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else: |
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if not isinstance(self.version_reqs, (str, list)): |
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raise DependencyException('Version argument must be string or list.') |
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if isinstance(self.version_reqs, str): |
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self.version_reqs = [self.version_reqs] |
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(self.is_found, not_found, found) = \ |
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version_compare_many(self.version, self.version_reqs) |
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if not self.is_found: |
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found_msg += [mlog.red('NO'), |
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'found {!r} but need:'.format(self.version), |
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', '.join(["'{}'".format(e) for e in not_found])] |
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if found: |
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found_msg += ['; matched:', |
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', '.join(["'{}'".format(e) for e in found])] |
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if not self.silent: |
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mlog.log(*found_msg) |
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if self.required: |
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m = 'Invalid version of dependency, need {!r} {!r} found {!r}.' |
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raise DependencyException(m.format(name, not_found, self.version)) |
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return |
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found_msg += [mlog.green('YES'), self.version] |
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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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# Print the found message only at the very end because fetching cflags |
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# and libs can also fail if other needed pkg-config files aren't found. |
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if not self.silent: |
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mlog.log(*found_msg) |
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def __repr__(self): |
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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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def _call_pkgbin(self, args): |
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p, out = Popen_safe([self.pkgbin] + args, env=os.environ)[0:2] |
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return p.returncode, out.strip() |
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def _set_cargs(self): |
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ret, out = self._call_pkgbin(['--cflags', self.name]) |
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if ret != 0: |
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raise DependencyException('Could not generate cargs for %s:\n\n%s' % |
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(self.name, out)) |
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self.compile_args = out.split() |
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def _set_libs(self): |
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libcmd = [self.name, '--libs'] |
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if self.static: |
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libcmd.append('--static') |
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ret, out = self._call_pkgbin(libcmd) |
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if ret != 0: |
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raise DependencyException('Could not generate libs for %s:\n\n%s' % |
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(self.name, out)) |
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self.link_args = [] |
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for lib in out.split(): |
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if lib.endswith(".la"): |
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shared_libname = self.extract_libtool_shlib(lib) |
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shared_lib = os.path.join(os.path.dirname(lib), shared_libname) |
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if not os.path.exists(shared_lib): |
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shared_lib = os.path.join(os.path.dirname(lib), ".libs", shared_libname) |
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if not os.path.exists(shared_lib): |
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raise DependencyException('Got a libtools specific "%s" dependencies' |
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'but we could not compute the actual shared' |
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'library path' % lib) |
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lib = shared_lib |
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self.is_libtool = True |
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self.link_args.append(lib) |
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def get_pkgconfig_variable(self, variable_name): |
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ret, out = self._call_pkgbin(['--variable=' + variable_name, self.name]) |
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variable = '' |
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if ret != 0: |
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if self.required: |
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raise DependencyException('%s dependency %s not found.' % |
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(self.type_string, self.name)) |
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else: |
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variable = out.strip() |
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mlog.debug('Got pkgconfig variable %s : %s' % (variable_name, variable)) |
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return variable |
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def get_methods(self): |
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return [DependencyMethods.PKGCONFIG] |
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def check_pkgconfig(self): |
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evar = 'PKG_CONFIG' |
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if evar in os.environ: |
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pkgbin = os.environ[evar].strip() |
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else: |
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pkgbin = 'pkg-config' |
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try: |
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p, out = Popen_safe([pkgbin, '--version'])[0:2] |
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if p.returncode != 0: |
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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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pkgbin = False |
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except (FileNotFoundError, PermissionError): |
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pkgbin = False |
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if pkgbin and not os.path.isabs(pkgbin) and shutil.which(pkgbin): |
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# Sometimes shutil.which fails where Popen succeeds, so |
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# only find the abs path if it can be found by shutil.which |
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pkgbin = shutil.which(pkgbin) |
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if not self.silent: |
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if pkgbin: |
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mlog.log('Found pkg-config:', mlog.bold(pkgbin), |
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'(%s)' % out.strip()) |
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else: |
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mlog.log('Found Pkg-config:', mlog.red('NO')) |
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return pkgbin |
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def extract_field(self, la_file, fieldname): |
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with open(la_file) as f: |
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for line in f: |
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arr = line.strip().split('=') |
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if arr[0] == fieldname: |
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return arr[1][1:-1] |
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return None |
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def extract_dlname_field(self, la_file): |
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return self.extract_field(la_file, 'dlname') |
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def extract_libdir_field(self, la_file): |
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return self.extract_field(la_file, 'libdir') |
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def extract_libtool_shlib(self, la_file): |
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''' |
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Returns the path to the shared library |
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corresponding to this .la file |
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''' |
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dlname = self.extract_dlname_field(la_file) |
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if dlname is None: |
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return None |
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# Darwin uses absolute paths where possible; since the libtool files never |
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# contain absolute paths, use the libdir field |
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if mesonlib.is_osx(): |
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dlbasename = os.path.basename(dlname) |
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libdir = self.extract_libdir_field(la_file) |
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if libdir is None: |
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return dlbasename |
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return os.path.join(libdir, dlbasename) |
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# From the comments in extract_libtool(), older libtools had |
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# a path rather than the raw dlname |
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return os.path.basename(dlname) |
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class ExternalProgram: |
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windows_exts = ('exe', 'msc', 'com', 'bat') |
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def __init__(self, name, command=None, silent=False, search_dir=None): |
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self.name = name |
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if command is not None: |
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self.command = listify(command) |
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else: |
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self.command = self._search(name, search_dir) |
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if not silent: |
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if self.found(): |
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mlog.log('Program', mlog.bold(name), 'found:', mlog.green('YES'), |
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'(%s)' % ' '.join(self.command)) |
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else: |
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mlog.log('Program', mlog.bold(name), 'found:', mlog.red('NO')) |
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def __repr__(self): |
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r = '<{} {!r} -> {!r}>' |
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return r.format(self.__class__.__name__, self.name, self.command) |
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@staticmethod |
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def _shebang_to_cmd(script): |
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""" |
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Check if the file has a shebang and manually parse it to figure out |
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the interpreter to use. This is useful if the script is not executable |
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or if we're on Windows (which does not understand shebangs). |
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""" |
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try: |
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with open(script) as f: |
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first_line = f.readline().strip() |
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if first_line.startswith('#!'): |
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commands = first_line[2:].split('#')[0].strip().split() |
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if mesonlib.is_windows(): |
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# Windows does not have UNIX paths so remove them, |
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# but don't remove Windows paths |
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if commands[0].startswith('/'): |
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commands[0] = commands[0].split('/')[-1] |
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if len(commands) > 0 and commands[0] == 'env': |
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commands = commands[1:] |
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# Windows does not ship python3.exe, but we know the path to it |
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if len(commands) > 0 and commands[0] == 'python3': |
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commands[0] = sys.executable |
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return commands + [script] |
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except Exception: |
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pass |
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return False |
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def _is_executable(self, path): |
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suffix = os.path.splitext(path)[-1].lower()[1:] |
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if mesonlib.is_windows(): |
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if suffix in self.windows_exts: |
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return True |
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elif os.access(path, os.X_OK): |
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return not os.path.isdir(path) |
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return False |
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def _search_dir(self, name, search_dir): |
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if search_dir is None: |
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return False |
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trial = os.path.join(search_dir, name) |
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if os.path.exists(trial): |
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if self._is_executable(trial): |
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return [trial] |
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# Now getting desperate. Maybe it is a script file that is |
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# a) not chmodded executable, or |
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# b) we are on windows so they can't be directly executed. |
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return self._shebang_to_cmd(trial) |
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else: |
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if mesonlib.is_windows(): |
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for ext in self.windows_exts: |
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trial_ext = '{}.{}'.format(trial, ext) |
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if os.path.exists(trial_ext): |
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return [trial_ext] |
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return False |
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def _search(self, name, search_dir): |
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''' |
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Search in the specified dir for the specified executable by name |
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and if not found search in PATH |
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''' |
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commands = self._search_dir(name, search_dir) |
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if commands: |
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return commands |
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# Do a standard search in PATH |
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command = shutil.which(name) |
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if not mesonlib.is_windows(): |
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# On UNIX-like platforms, shutil.which() is enough to find |
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# all executables whether in PATH or with an absolute path |
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return [command] |
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# HERE BEGINS THE TERROR OF WINDOWS |
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if command: |
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# On Windows, even if the PATH search returned a full path, we can't be |
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# sure that it can be run directly if it's not a native executable. |
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# For instance, interpreted scripts sometimes need to be run explicitly |
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# with an interpreter if the file association is not done properly. |
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name_ext = os.path.splitext(command)[1] |
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if name_ext[1:].lower() in self.windows_exts: |
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# Good, it can be directly executed |
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return [command] |
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# Try to extract the interpreter from the shebang |
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commands = self._shebang_to_cmd(command) |
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if commands: |
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return commands |
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else: |
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# Maybe the name is an absolute path to a native Windows |
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# executable, but without the extension. This is technically wrong, |
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# but many people do it because it works in the MinGW shell. |
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if os.path.isabs(name): |
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for ext in self.windows_exts: |
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command = '{}.{}'.format(name, ext) |
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if os.path.exists(command): |
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return [command] |
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# On Windows, interpreted scripts must have an extension otherwise they |
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# cannot be found by a standard PATH search. So we do a custom search |
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# where we manually search for a script with a shebang in PATH. |
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search_dirs = os.environ.get('PATH', '').split(';') |
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for search_dir in search_dirs: |
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commands = self._search_dir(name, search_dir) |
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if commands: |
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return commands |
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return [None] |
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def found(self): |
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return self.command[0] is not None |
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def get_command(self): |
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return self.command[:] |
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def get_path(self): |
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if self.found(): |
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# Assume that the last element is the full path to the script or |
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# binary being run |
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return self.command[-1] |
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return None |
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def get_name(self): |
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return self.name |
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class ExternalLibrary(ExternalDependency): |
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def __init__(self, name, link_args, environment, language, silent=False): |
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super().__init__('external', environment, language, {}) |
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self.name = name |
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self.language = language |
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self.is_found = False |
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if link_args: |
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self.is_found = True |
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self.link_args = link_args |
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if not silent: |
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if self.is_found: |
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mlog.log('Library', mlog.bold(name), 'found:', mlog.green('YES')) |
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else: |
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mlog.log('Library', mlog.bold(name), 'found:', mlog.red('NO')) |
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def get_link_args(self, language=None): |
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''' |
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External libraries detected using a compiler must only be used with |
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compatible code. For instance, Vala libraries (.vapi files) cannot be |
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used with C code, and not all Rust library types can be linked with |
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C-like code. Note that C++ libraries *can* be linked with C code with |
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a C++ linker (and vice-versa). |
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''' |
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# Using a vala library in a non-vala target, or a non-vala library in a vala target |
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# XXX: This should be extended to other non-C linkers such as Rust |
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if (self.language == 'vala' and language != 'vala') or \ |
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(language == 'vala' and self.language != 'vala'): |
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return [] |
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return self.link_args |
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class ExtraFrameworkDependency(ExternalDependency): |
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def __init__(self, name, required, path, env, lang, kwargs): |
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super().__init__('extraframeworks', env, lang, kwargs) |
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self.name = None |
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self.required = required |
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self.detect(name, path) |
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if self.found(): |
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mlog.log('Dependency', mlog.bold(name), 'found:', mlog.green('YES'), |
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os.path.join(self.path, self.name)) |
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else: |
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mlog.log('Dependency', name, 'found:', mlog.red('NO')) |
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|
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def detect(self, name, path): |
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lname = name.lower() |
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if path is None: |
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paths = ['/System/Library/Frameworks', '/Library/Frameworks'] |
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else: |
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paths = [path] |
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for p in paths: |
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for d in os.listdir(p): |
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fullpath = os.path.join(p, d) |
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if lname != d.split('.')[0].lower(): |
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continue |
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if not stat.S_ISDIR(os.stat(fullpath).st_mode): |
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continue |
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self.path = p |
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self.name = d |
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self.is_found = True |
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return |
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if not self.found() and self.required: |
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raise DependencyException('Framework dependency %s not found.' % (name, )) |
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|
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def get_compile_args(self): |
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if self.found(): |
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return ['-I' + os.path.join(self.path, self.name, 'Headers')] |
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return [] |
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|
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def get_link_args(self): |
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if self.found(): |
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return ['-F' + self.path, '-framework', self.name.split('.')[0]] |
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return [] |
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|
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def get_version(self): |
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return 'unknown' |
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|
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def get_dep_identifier(name, kwargs, want_cross): |
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# Need immutable objects since the identifier will be used as a dict key |
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version_reqs = listify(kwargs.get('version', [])) |
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if isinstance(version_reqs, list): |
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version_reqs = frozenset(version_reqs) |
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identifier = (name, version_reqs, want_cross) |
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for key, value in kwargs.items(): |
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# 'version' is embedded above as the second element for easy access |
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# 'native' is handled above with `want_cross` |
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# 'required' is irrelevant for caching; the caller handles it separately |
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# 'fallback' subprojects cannot be cached -- they must be initialized |
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if key in ('version', 'native', 'required', 'fallback',): |
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continue |
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# All keyword arguments are strings, ints, or lists (or lists of lists) |
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if isinstance(value, list): |
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value = frozenset(listify(value)) |
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identifier += (key, value) |
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return identifier |
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|
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def find_external_dependency(name, env, kwargs): |
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required = kwargs.get('required', True) |
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if not isinstance(required, bool): |
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raise DependencyException('Keyword "required" must be a boolean.') |
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if not isinstance(kwargs.get('method', ''), str): |
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raise DependencyException('Keyword "method" must be a string.') |
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lname = name.lower() |
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if lname in packages: |
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if lname not in _packages_accept_language and 'language' in kwargs: |
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raise DependencyException('%s dependency does not accept "language" keyword argument' % (lname, )) |
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dep = packages[lname](env, kwargs) |
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if required and not dep.found(): |
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raise DependencyException('Dependency "%s" not found' % name) |
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return dep |
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if 'language' in kwargs: |
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# Remove check when PkgConfigDependency supports language. |
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raise DependencyException('%s dependency does not accept "language" keyword argument' % (lname, )) |
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pkg_exc = None |
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pkgdep = None |
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try: |
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pkgdep = PkgConfigDependency(name, env, kwargs) |
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if pkgdep.found(): |
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return pkgdep |
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except Exception as e: |
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pkg_exc = e |
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if mesonlib.is_osx(): |
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fwdep = ExtraFrameworkDependency(name, False, None, env, None, kwargs) |
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if required and not fwdep.found(): |
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m = 'Dependency {!r} not found, tried Extra Frameworks ' \ |
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'and Pkg-Config:\n\n' + str(pkg_exc) |
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raise DependencyException(m.format(name)) |
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return fwdep |
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if pkg_exc is not None: |
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raise pkg_exc |
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mlog.log('Dependency', mlog.bold(name), 'found:', mlog.red('NO')) |
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return pkgdep
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