diff options
Diffstat (limited to 'mesonbuild/dependencies/base.py')
| -rw-r--r-- | mesonbuild/dependencies/base.py | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/mesonbuild/dependencies/base.py b/mesonbuild/dependencies/base.py index d901ef9..e78a420 100644 --- a/mesonbuild/dependencies/base.py +++ b/mesonbuild/dependencies/base.py @@ -46,6 +46,19 @@ class DependencyException(MesonException): '''Exceptions raised while trying to find dependencies''' +class MissingCompiler: + """Represent a None Compiler - when no tool chain is found. + replacing AttributeError with DependencyException""" + + def __getattr__(self, item: str) -> T.Any: + if item.startswith('__'): + raise AttributeError() + raise DependencyException('no toolchain found') + + def __bool__(self) -> bool: + return False + + class DependencyMethods(Enum): # Auto means to use whatever dependency checking mechanisms in whatever order meson thinks is best. AUTO = 'auto' @@ -361,7 +374,7 @@ class ExternalDependency(Dependency, HasNativeKwarg): HasNativeKwarg.__init__(self, kwargs) self.clib_compiler = detect_compiler(self.name, environment, self.for_machine, self.language) - def get_compiler(self) -> 'Compiler': + def get_compiler(self) -> T.Union['MissingCompiler', 'Compiler']: return self.clib_compiler def get_partial_dependency(self, *, compile_args: bool = False, @@ -573,7 +586,7 @@ def process_method_kw(possible: T.Iterable[DependencyMethods], kwargs: T.Dict[st return methods def detect_compiler(name: str, env: 'Environment', for_machine: MachineChoice, - language: T.Optional[str]) -> T.Optional['Compiler']: + language: T.Optional[str]) -> T.Union['MissingCompiler', 'Compiler']: """Given a language and environment find the compiler used.""" compilers = env.coredata.compilers[for_machine] @@ -591,7 +604,7 @@ def detect_compiler(name: str, env: 'Environment', for_machine: MachineChoice, return compilers[lang] except KeyError: continue - return None + return MissingCompiler() class SystemDependency(ExternalDependency): |