diff options
Diffstat (limited to 'mesonbuild/interpreterbase.py')
| -rw-r--r-- | mesonbuild/interpreterbase.py | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/mesonbuild/interpreterbase.py b/mesonbuild/interpreterbase.py index 6e31202..136eb6e 100644 --- a/mesonbuild/interpreterbase.py +++ b/mesonbuild/interpreterbase.py @@ -424,12 +424,18 @@ class KwargInfo(T.Generic[_T]): itself contain mutable types, typed_kwargs will copy the default :param since: Meson version in which this argument has been added. defaults to None :param deprecated: Meson version in which this argument has been deprecated. defaults to None + :param validator: A callable that does additional validation. This is mainly + intended for cases where a string is expected, but only a few specific + values are accepted. Must return None if the input is valid, or a + message if the input is invalid """ def __init__(self, name: str, types: T.Union[T.Type[_T], T.Tuple[T.Type[_T], ...], ContainerTypeInfo], *, required: bool = False, listify: bool = False, default: T.Optional[_T] = None, - since: T.Optional[str] = None, deprecated: T.Optional[str] = None): + since: T.Optional[str] = None, + deprecated: T.Optional[str] = None, + validator: T.Optional[T.Callable[[_T], T.Optional[str]]] = None): self.name = name self.types = types self.required = required @@ -437,6 +443,7 @@ class KwargInfo(T.Generic[_T]): self.default = default self.since = since self.deprecated = deprecated + self.validator = validator def typed_kwargs(name: str, *types: KwargInfo) -> T.Callable[..., T.Any]: @@ -492,6 +499,11 @@ def typed_kwargs(name: str, *types: KwargInfo) -> T.Callable[..., T.Any]: else: shouldbe = f'"{info.types.__name__}"' raise InvalidArguments(f'{name} keyword argument "{info.name}"" was of type "{type(value).__name__}" but should have been {shouldbe}') + + if info.validator is not None: + msg = info.validator(value) + if msg is not None: + raise InvalidArguments(f'{name} keyword argument "{info.name}" {msg}') elif info.required: raise InvalidArguments(f'{name} is missing required keyword argument "{info.name}"') else: |