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561 lines
25 KiB
561 lines
25 KiB
# 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 .. import mesonlib, mlog |
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from .baseobjects import TV_func, TYPE_nvar |
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from .disabler import Disabler |
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from .exceptions import InterpreterException, InvalidArguments |
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from .helpers import check_stringlist, get_callee_args |
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from functools import wraps |
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import abc |
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import itertools |
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import typing as T |
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def noPosargs(f: TV_func) -> TV_func: |
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@wraps(f) |
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def wrapped(*wrapped_args: T.Any, **wrapped_kwargs: T.Any) -> T.Any: |
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args = get_callee_args(wrapped_args)[2] |
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if args: |
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raise InvalidArguments('Function does not take positional arguments.') |
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return f(*wrapped_args, **wrapped_kwargs) |
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return T.cast(TV_func, wrapped) |
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def builtinMethodNoKwargs(f: TV_func) -> TV_func: |
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@wraps(f) |
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def wrapped(*wrapped_args: T.Any, **wrapped_kwargs: T.Any) -> T.Any: |
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node = wrapped_args[0].current_node |
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method_name = wrapped_args[2] |
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kwargs = wrapped_args[4] |
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if kwargs: |
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mlog.warning(f'Method {method_name!r} does not take keyword arguments.', |
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'This will become a hard error in the future', |
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location=node) |
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return f(*wrapped_args, **wrapped_kwargs) |
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return T.cast(TV_func, wrapped) |
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def noKwargs(f: TV_func) -> TV_func: |
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@wraps(f) |
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def wrapped(*wrapped_args: T.Any, **wrapped_kwargs: T.Any) -> T.Any: |
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kwargs = get_callee_args(wrapped_args)[3] |
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if kwargs: |
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raise InvalidArguments('Function does not take keyword arguments.') |
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return f(*wrapped_args, **wrapped_kwargs) |
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return T.cast(TV_func, wrapped) |
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def stringArgs(f: TV_func) -> TV_func: |
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@wraps(f) |
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def wrapped(*wrapped_args: T.Any, **wrapped_kwargs: T.Any) -> T.Any: |
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args = get_callee_args(wrapped_args)[2] |
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assert(isinstance(args, list)) |
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check_stringlist(args) |
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return f(*wrapped_args, **wrapped_kwargs) |
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return T.cast(TV_func, wrapped) |
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def noArgsFlattening(f: TV_func) -> TV_func: |
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setattr(f, 'no-args-flattening', True) # noqa: B010 |
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return f |
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def disablerIfNotFound(f: TV_func) -> TV_func: |
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@wraps(f) |
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def wrapped(*wrapped_args: T.Any, **wrapped_kwargs: T.Any) -> T.Any: |
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kwargs = get_callee_args(wrapped_args)[3] |
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disabler = kwargs.pop('disabler', False) |
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ret = f(*wrapped_args, **wrapped_kwargs) |
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if disabler and not ret.held_object.found(): |
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return Disabler() |
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return ret |
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return T.cast(TV_func, wrapped) |
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class permittedKwargs: |
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def __init__(self, permitted: T.Set[str]): |
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self.permitted = permitted # type: T.Set[str] |
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def __call__(self, f: TV_func) -> TV_func: |
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@wraps(f) |
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def wrapped(*wrapped_args: T.Any, **wrapped_kwargs: T.Any) -> T.Any: |
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s, node, args, kwargs, _ = get_callee_args(wrapped_args) |
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for k in kwargs: |
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if k not in self.permitted: |
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mlog.warning(f'''Passed invalid keyword argument "{k}".''', location=node) |
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mlog.warning('This will become a hard error in the future.') |
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return f(*wrapped_args, **wrapped_kwargs) |
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return T.cast(TV_func, wrapped) |
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def typed_pos_args(name: str, *types: T.Union[T.Type, T.Tuple[T.Type, ...]], |
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varargs: T.Optional[T.Union[T.Type, T.Tuple[T.Type, ...]]] = None, |
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optargs: T.Optional[T.List[T.Union[T.Type, T.Tuple[T.Type, ...]]]] = None, |
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min_varargs: int = 0, max_varargs: int = 0) -> T.Callable[..., T.Any]: |
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"""Decorator that types type checking of positional arguments. |
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This supports two different models of optional aguments, the first is the |
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variadic argument model. Variadic arguments are a possibly bounded, |
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possibly unbounded number of arguments of the same type (unions are |
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supported). The second is the standard default value model, in this case |
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a number of optional arguments may be provided, but they are still |
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ordered, and they may have different types. |
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This function does not support mixing variadic and default arguments. |
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:name: The name of the decorated function (as displayed in error messages) |
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:varargs: They type(s) of any variadic arguments the function takes. If |
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None the function takes no variadic args |
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:min_varargs: the minimum number of variadic arguments taken |
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:max_varargs: the maximum number of variadic arguments taken. 0 means unlimited |
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:optargs: The types of any optional arguments parameters taken. If None |
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then no optional paramters are taken. |
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Some examples of usage blow: |
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>>> @typed_pos_args('mod.func', str, (str, int)) |
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... def func(self, state: ModuleState, args: T.Tuple[str, T.Union[str, int]], kwargs: T.Dict[str, T.Any]) -> T.Any: |
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... pass |
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>>> @typed_pos_args('method', str, varargs=str) |
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... def method(self, node: BaseNode, args: T.Tuple[str, T.List[str]], kwargs: T.Dict[str, T.Any]) -> T.Any: |
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... pass |
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>>> @typed_pos_args('method', varargs=str, min_varargs=1) |
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... def method(self, node: BaseNode, args: T.Tuple[T.List[str]], kwargs: T.Dict[str, T.Any]) -> T.Any: |
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... pass |
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>>> @typed_pos_args('method', str, optargs=[(str, int), str]) |
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... def method(self, node: BaseNode, args: T.Tuple[str, T.Optional[T.Union[str, int]], T.Optional[str]], kwargs: T.Dict[str, T.Any]) -> T.Any: |
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... pass |
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When should you chose `typed_pos_args('name', varargs=str, |
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min_varargs=1)` vs `typed_pos_args('name', str, varargs=str)`? |
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The answer has to do with the semantics of the function, if all of the |
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inputs are the same type (such as with `files()`) then the former is |
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correct, all of the arguments are string names of files. If the first |
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argument is something else the it should be separated. |
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""" |
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def inner(f: TV_func) -> TV_func: |
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@wraps(f) |
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def wrapper(*wrapped_args: T.Any, **wrapped_kwargs: T.Any) -> T.Any: |
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args = get_callee_args(wrapped_args)[2] |
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# These are implementation programming errors, end users should never see them. |
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assert isinstance(args, list), args |
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assert max_varargs >= 0, 'max_varags cannot be negative' |
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assert min_varargs >= 0, 'min_varags cannot be negative' |
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assert optargs is None or varargs is None, \ |
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'varargs and optargs not supported together as this would be ambiguous' |
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num_args = len(args) |
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num_types = len(types) |
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a_types = types |
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if varargs: |
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min_args = num_types + min_varargs |
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max_args = num_types + max_varargs |
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if max_varargs == 0 and num_args < min_args: |
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raise InvalidArguments(f'{name} takes at least {min_args} arguments, but got {num_args}.') |
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elif max_varargs != 0 and (num_args < min_args or num_args > max_args): |
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raise InvalidArguments(f'{name} takes between {min_args} and {max_args} arguments, but got {num_args}.') |
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elif optargs: |
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if num_args < num_types: |
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raise InvalidArguments(f'{name} takes at least {num_types} arguments, but got {num_args}.') |
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elif num_args > num_types + len(optargs): |
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raise InvalidArguments(f'{name} takes at most {num_types + len(optargs)} arguments, but got {num_args}.') |
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# Add the number of positional arguments required |
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if num_args > num_types: |
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diff = num_args - num_types |
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a_types = tuple(list(types) + list(optargs[:diff])) |
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elif num_args != num_types: |
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raise InvalidArguments(f'{name} takes exactly {num_types} arguments, but got {num_args}.') |
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for i, (arg, type_) in enumerate(itertools.zip_longest(args, a_types, fillvalue=varargs), start=1): |
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if not isinstance(arg, type_): |
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if isinstance(type_, tuple): |
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shouldbe = 'one of: {}'.format(", ".join(f'"{t.__name__}"' for t in type_)) |
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else: |
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shouldbe = f'"{type_.__name__}"' |
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raise InvalidArguments(f'{name} argument {i} was of type "{type(arg).__name__}" but should have been {shouldbe}') |
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# Ensure that we're actually passing a tuple. |
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# Depending on what kind of function we're calling the length of |
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# wrapped_args can vary. |
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nargs = list(wrapped_args) |
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i = nargs.index(args) |
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if varargs: |
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# if we have varargs we need to split them into a separate |
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# tuple, as python's typing doesn't understand tuples with |
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# fixed elements and variadic elements, only one or the other. |
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# so in that case we need T.Tuple[int, str, float, T.Tuple[str, ...]] |
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pos = args[:len(types)] |
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var = list(args[len(types):]) |
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pos.append(var) |
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nargs[i] = tuple(pos) |
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elif optargs: |
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if num_args < num_types + len(optargs): |
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diff = num_types + len(optargs) - num_args |
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nargs[i] = tuple(list(args) + [None] * diff) |
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else: |
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nargs[i] = args |
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else: |
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nargs[i] = tuple(args) |
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return f(*nargs, **wrapped_kwargs) |
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return T.cast(TV_func, wrapper) |
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return inner |
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class ContainerTypeInfo: |
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"""Container information for keyword arguments. |
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For keyword arguments that are containers (list or dict), this class encodes |
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that information. |
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:param container: the type of container |
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:param contains: the types the container holds |
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:param pairs: if the container is supposed to be of even length. |
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This is mainly used for interfaces that predate the addition of dictionaries, and use |
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`[key, value, key2, value2]` format. |
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:param allow_empty: Whether this container is allowed to be empty |
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There are some cases where containers not only must be passed, but must |
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not be empty, and other cases where an empty container is allowed. |
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""" |
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def __init__(self, container: T.Type, contains: T.Union[T.Type, T.Tuple[T.Type, ...]], *, |
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pairs: bool = False, allow_empty: bool = True) : |
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self.container = container |
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self.contains = contains |
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self.pairs = pairs |
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self.allow_empty = allow_empty |
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def check(self, value: T.Any) -> T.Optional[str]: |
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"""Check that a value is valid. |
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:param value: A value to check |
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:return: If there is an error then a string message, otherwise None |
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""" |
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if not isinstance(value, self.container): |
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return f'container type was "{type(value).__name__}", but should have been "{self.container.__name__}"' |
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iter_ = iter(value.values()) if isinstance(value, dict) else iter(value) |
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for each in iter_: |
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if not isinstance(each, self.contains): |
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if isinstance(self.contains, tuple): |
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shouldbe = 'one of: {}'.format(", ".join(f'"{t.__name__}"' for t in self.contains)) |
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else: |
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shouldbe = f'"{self.contains.__name__}"' |
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return f'contained a value of type "{type(each).__name__}" but should have been {shouldbe}' |
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if self.pairs and len(value) % 2 != 0: |
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return 'container should be of even length, but is not' |
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if not value and not self.allow_empty: |
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return 'container is empty, but not allowed to be' |
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return None |
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_T = T.TypeVar('_T') |
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class KwargInfo(T.Generic[_T]): |
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"""A description of a keyword argument to a meson function |
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This is used to describe a value to the :func:typed_kwargs function. |
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:param name: the name of the parameter |
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:param types: A type or tuple of types that are allowed, or a :class:ContainerType |
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:param required: Whether this is a required keyword argument. defaults to False |
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:param listify: If true, then the argument will be listified before being |
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checked. This is useful for cases where the Meson DSL allows a scalar or |
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a container, but internally we only want to work with containers |
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:param default: A default value to use if this isn't set. defaults to None, |
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this may be safely set to a mutable type, as long as that type does not |
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itself contain mutable types, typed_kwargs will copy the default |
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:param since: Meson version in which this argument has been added. defaults to None |
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:param deprecated: Meson version in which this argument has been deprecated. defaults to None |
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:param validator: A callable that does additional validation. This is mainly |
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intended for cases where a string is expected, but only a few specific |
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values are accepted. Must return None if the input is valid, or a |
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message if the input is invalid |
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:param convertor: A callable that converts the raw input value into a |
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different type. This is intended for cases such as the meson DSL using a |
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string, but the implementation using an Enum. This should not do |
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validation, just converstion. |
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""" |
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def __init__(self, name: str, types: T.Union[T.Type[_T], T.Tuple[T.Type[_T], ...], ContainerTypeInfo], |
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*, required: bool = False, listify: bool = False, |
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default: T.Optional[_T] = None, |
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since: T.Optional[str] = None, |
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deprecated: T.Optional[str] = None, |
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validator: T.Optional[T.Callable[[_T], T.Optional[str]]] = None, |
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convertor: T.Optional[T.Callable[[_T], TYPE_nvar]] = None): |
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self.name = name |
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self.types = types |
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self.required = required |
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self.listify = listify |
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self.default = default |
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self.since = since |
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self.deprecated = deprecated |
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self.validator = validator |
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self.convertor = convertor |
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def typed_kwargs(name: str, *types: KwargInfo) -> T.Callable[..., T.Any]: |
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"""Decorator for type checking keyword arguments. |
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Used to wrap a meson DSL implementation function, where it checks various |
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things about keyword arguments, including the type, and various other |
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information. For non-required values it sets the value to a default, which |
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means the value will always be provided. |
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If type tyhpe is a :class:ContainerTypeInfo, then the default value will be |
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passed as an argument to the container initializer, making a shallow copy |
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:param name: the name of the function, including the object it's attached ot |
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(if applicable) |
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:param *types: KwargInfo entries for each keyword argument. |
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""" |
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def inner(f: TV_func) -> TV_func: |
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@wraps(f) |
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def wrapper(*wrapped_args: T.Any, **wrapped_kwargs: T.Any) -> T.Any: |
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kwargs, subproject = get_callee_args(wrapped_args, want_subproject=True)[3:5] |
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all_names = {t.name for t in types} |
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unknowns = set(kwargs).difference(all_names) |
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if unknowns: |
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# Warn about unknown argumnts, delete them and continue. This |
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# keeps current behavior |
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ustr = ', '.join([f'"{u}"' for u in sorted(unknowns)]) |
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mlog.warning(f'{name} got unknown keyword arguments {ustr}') |
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for u in unknowns: |
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del kwargs[u] |
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for info in types: |
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value = kwargs.get(info.name) |
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if value is not None: |
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if info.since: |
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feature_name = info.name + ' arg in ' + name |
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FeatureNew.single_use(feature_name, info.since, subproject) |
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if info.deprecated: |
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feature_name = info.name + ' arg in ' + name |
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FeatureDeprecated.single_use(feature_name, info.deprecated, subproject) |
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if info.listify: |
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kwargs[info.name] = value = mesonlib.listify(value) |
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if isinstance(info.types, ContainerTypeInfo): |
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msg = info.types.check(value) |
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if msg is not None: |
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raise InvalidArguments(f'{name} keyword argument "{info.name}" {msg}') |
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else: |
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if not isinstance(value, info.types): |
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if isinstance(info.types, tuple): |
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shouldbe = 'one of: {}'.format(", ".join(f'"{t.__name__}"' for t in info.types)) |
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else: |
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shouldbe = f'"{info.types.__name__}"' |
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raise InvalidArguments(f'{name} keyword argument "{info.name}"" was of type "{type(value).__name__}" but should have been {shouldbe}') |
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if info.validator is not None: |
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msg = info.validator(value) |
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if msg is not None: |
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raise InvalidArguments(f'{name} keyword argument "{info.name}" {msg}') |
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elif info.required: |
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raise InvalidArguments(f'{name} is missing required keyword argument "{info.name}"') |
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else: |
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# set the value to the default, this ensuring all kwargs are present |
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# This both simplifies the typing checking and the usage |
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# Create a shallow copy of the container (and do a type |
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# conversion if necessary). This allows mutable types to |
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# be used safely as default values |
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if isinstance(info.types, ContainerTypeInfo): |
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kwargs[info.name] = info.types.container(info.default) |
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else: |
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kwargs[info.name] = info.default |
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if info.convertor: |
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kwargs[info.name] = info.convertor(kwargs[info.name]) |
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return f(*wrapped_args, **wrapped_kwargs) |
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return T.cast(TV_func, wrapper) |
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return inner |
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class FeatureCheckBase(metaclass=abc.ABCMeta): |
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"Base class for feature version checks" |
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# In python 3.6 we can just forward declare this, but in 3.5 we can't |
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# This will be overwritten by the subclasses by necessity |
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feature_registry = {} # type: T.ClassVar[T.Dict[str, T.Dict[str, T.Set[str]]]] |
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def __init__(self, feature_name: str, version: str, extra_message: T.Optional[str] = None): |
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self.feature_name = feature_name # type: str |
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self.feature_version = version # type: str |
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self.extra_message = extra_message or '' # type: str |
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@staticmethod |
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def get_target_version(subproject: str) -> str: |
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# Don't do any checks if project() has not been parsed yet |
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if subproject not in mesonlib.project_meson_versions: |
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return '' |
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return mesonlib.project_meson_versions[subproject] |
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@staticmethod |
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@abc.abstractmethod |
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def check_version(target_version: str, feature_Version: str) -> bool: |
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pass |
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def use(self, subproject: str) -> None: |
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tv = self.get_target_version(subproject) |
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# No target version |
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if tv == '': |
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return |
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# Target version is new enough |
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if self.check_version(tv, self.feature_version): |
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return |
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# Feature is too new for target version, register it |
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if subproject not in self.feature_registry: |
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self.feature_registry[subproject] = {self.feature_version: set()} |
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register = self.feature_registry[subproject] |
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if self.feature_version not in register: |
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register[self.feature_version] = set() |
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if self.feature_name in register[self.feature_version]: |
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# Don't warn about the same feature multiple times |
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# FIXME: This is needed to prevent duplicate warnings, but also |
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# means we won't warn about a feature used in multiple places. |
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return |
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register[self.feature_version].add(self.feature_name) |
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self.log_usage_warning(tv) |
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@classmethod |
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def report(cls, subproject: str) -> None: |
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if subproject not in cls.feature_registry: |
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return |
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warning_str = cls.get_warning_str_prefix(cls.get_target_version(subproject)) |
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fv = cls.feature_registry[subproject] |
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for version in sorted(fv.keys()): |
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warning_str += '\n * {}: {}'.format(version, fv[version]) |
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mlog.warning(warning_str) |
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def log_usage_warning(self, tv: str) -> None: |
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raise InterpreterException('log_usage_warning not implemented') |
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@staticmethod |
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def get_warning_str_prefix(tv: str) -> str: |
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raise InterpreterException('get_warning_str_prefix not implemented') |
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def __call__(self, f: TV_func) -> TV_func: |
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@wraps(f) |
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def wrapped(*wrapped_args: T.Any, **wrapped_kwargs: T.Any) -> T.Any: |
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subproject = get_callee_args(wrapped_args, want_subproject=True)[4] |
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if subproject is None: |
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raise AssertionError(f'{wrapped_args!r}') |
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self.use(subproject) |
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return f(*wrapped_args, **wrapped_kwargs) |
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return T.cast(TV_func, wrapped) |
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@classmethod |
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def single_use(cls, feature_name: str, version: str, subproject: str, |
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extra_message: T.Optional[str] = None) -> None: |
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"""Oneline version that instantiates and calls use().""" |
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cls(feature_name, version, extra_message).use(subproject) |
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class FeatureNew(FeatureCheckBase): |
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"""Checks for new features""" |
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|
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# Class variable, shared across all instances |
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# |
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# Format: {subproject: {feature_version: set(feature_names)}} |
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feature_registry = {} # type: T.ClassVar[T.Dict[str, T.Dict[str, T.Set[str]]]] |
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@staticmethod |
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def check_version(target_version: str, feature_version: str) -> bool: |
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return mesonlib.version_compare_condition_with_min(target_version, feature_version) |
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@staticmethod |
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def get_warning_str_prefix(tv: str) -> str: |
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return f'Project specifies a minimum meson_version \'{tv}\' but uses features which were added in newer versions:' |
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def log_usage_warning(self, tv: str) -> None: |
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args = [ |
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'Project targeting', f"'{tv}'", |
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'but tried to use feature introduced in', |
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f"'{self.feature_version}':", |
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f'{self.feature_name}.', |
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] |
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if self.extra_message: |
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args.append(self.extra_message) |
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mlog.warning(*args) |
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class FeatureDeprecated(FeatureCheckBase): |
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"""Checks for deprecated features""" |
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# Class variable, shared across all instances |
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# |
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# Format: {subproject: {feature_version: set(feature_names)}} |
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feature_registry = {} # type: T.ClassVar[T.Dict[str, T.Dict[str, T.Set[str]]]] |
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|
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@staticmethod |
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def check_version(target_version: str, feature_version: str) -> bool: |
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# For deprecation checks we need to return the inverse of FeatureNew checks |
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return not mesonlib.version_compare_condition_with_min(target_version, feature_version) |
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|
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@staticmethod |
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def get_warning_str_prefix(tv: str) -> str: |
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return 'Deprecated features used:' |
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|
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def log_usage_warning(self, tv: str) -> None: |
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args = [ |
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'Project targeting', f"'{tv}'", |
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'but tried to use feature deprecated since', |
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f"'{self.feature_version}':", |
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f'{self.feature_name}.', |
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] |
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if self.extra_message: |
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args.append(self.extra_message) |
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mlog.warning(*args) |
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class FeatureCheckKwargsBase(metaclass=abc.ABCMeta): |
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@property |
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@abc.abstractmethod |
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def feature_check_class(self) -> T.Type[FeatureCheckBase]: |
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pass |
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def __init__(self, feature_name: str, feature_version: str, |
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kwargs: T.List[str], extra_message: T.Optional[str] = None): |
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self.feature_name = feature_name |
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self.feature_version = feature_version |
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self.kwargs = kwargs |
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self.extra_message = extra_message |
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def __call__(self, f: TV_func) -> TV_func: |
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@wraps(f) |
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def wrapped(*wrapped_args: T.Any, **wrapped_kwargs: T.Any) -> T.Any: |
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kwargs, subproject = get_callee_args(wrapped_args, want_subproject=True)[3:5] |
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if subproject is None: |
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raise AssertionError(f'{wrapped_args!r}') |
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for arg in self.kwargs: |
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if arg not in kwargs: |
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continue |
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name = arg + ' arg in ' + self.feature_name |
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self.feature_check_class.single_use( |
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name, self.feature_version, subproject, self.extra_message) |
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return f(*wrapped_args, **wrapped_kwargs) |
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return T.cast(TV_func, wrapped) |
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class FeatureNewKwargs(FeatureCheckKwargsBase): |
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feature_check_class = FeatureNew |
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class FeatureDeprecatedKwargs(FeatureCheckKwargsBase): |
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feature_check_class = FeatureDeprecated
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