Dylan Baker
3 years ago
committed by
Xavier Claessens
parent
40d5a38d1b
commit
d1b52b913f
2 changed files with 121 additions and 104 deletions
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# SPDX-License-Identifier: Apache-2.0 |
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# Copyright © 2021 Intel Corporation |
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"""Helpers for strict type checking.""" |
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import typing as T |
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from .. import compilers |
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from ..coredata import UserFeatureOption |
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from ..interpreterbase.decorators import KwargInfo, ContainerTypeInfo |
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from ..mesonlib import FileMode, MachineChoice |
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def _language_validator(l: T.List[str]) -> T.Optional[str]: |
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"""Validate language keyword argument. |
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Particularly for functions like `add_compiler()`, and `add_*_args()` |
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""" |
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diff = {a.lower() for a in l}.difference(compilers.all_languages) |
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if diff: |
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return f'unknown languages: {", ".join(diff)}' |
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return None |
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def _install_mode_validator(mode: T.List[T.Union[str, bool, int]]) -> T.Optional[str]: |
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"""Validate the `install_mode` keyword argument. |
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This is a rather odd thing, it's a scalar, or an array of 3 values in the form: |
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[(str | False), (str | int | False) = False, (str | int | False) = False] |
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Where the second and third arguments are not required, and are considered to |
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default to False. |
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""" |
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if not mode: |
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return None |
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if True in mode: |
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return 'can only be a string or false, not true' |
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if len(mode) > 3: |
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return 'may have at most 3 elements' |
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perms = mode[0] |
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if not isinstance(perms, (str, bool)): |
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return 'permissions part must be a string or false' |
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if isinstance(perms, str): |
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if not len(perms) == 9: |
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return (f'permissions string must be exactly 9 characters, got "{len(perms)}" ' |
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'in the form rwxr-xr-x') |
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for i in [0, 3, 6]: |
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if perms[i] not in {'-', 'r'}: |
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return f'bit {i} must be "-" or "r", not {perms[i]}' |
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for i in [1, 4, 7]: |
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if perms[i] not in {'-', 'w'}: |
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return f'bit {i} must be "-" or "w", not {perms[i]}' |
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for i in [2, 5]: |
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if perms[i] not in {'-', 'x', 's', 'S'}: |
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return f'bit {i} must be "-", "s", "S", or "x", not {perms[i]}' |
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if perms[8] not in {'-', 'x', 't', 'T'}: |
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return f'bit 8 must be "-", "t", "T", or "x", not {perms[8]}' |
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if len(mode) >= 2 and not isinstance(mode[1], (int, str, bool)): |
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return 'second componenent must be a string, number, or False if provided' |
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if len(mode) >= 3 and not isinstance(mode[2], (int, str, bool)): |
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return 'third componenent must be a string, number, or False if provided' |
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return None |
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def _install_mode_convertor(mode: T.Optional[T.List[T.Union[str, bool, int]]]) -> FileMode: |
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"""Convert the DSL form of the `install_mode` keyword arugment to `FileMode` |
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This is not required, and if not required returns None |
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TODO: It's not clear to me why this needs to be None and not just return an |
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emtpy FileMode. |
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""" |
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# this has already been validated by the validator |
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return FileMode(*[m if isinstance(m, str) else None for m in mode]) |
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NATIVE_KW = KwargInfo( |
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'native', bool, |
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default=False, |
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convertor=lambda n: MachineChoice.BUILD if n else MachineChoice.HOST) |
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LANGUAGE_KW = KwargInfo( |
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'language', ContainerTypeInfo(list, str, allow_empty=False), |
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listify=True, |
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required=True, |
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validator=_language_validator, |
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convertor=lambda x: [i.lower() for i in x]) |
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INSTALL_MODE_KW = KwargInfo( |
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'install_mode', |
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ContainerTypeInfo(list, (str, bool, int)), |
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listify=True, |
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default=[], |
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validator=_install_mode_validator, |
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convertor=_install_mode_convertor, |
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) |
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REQUIRED_KW = KwargInfo( |
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'required', |
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(bool, UserFeatureOption), |
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default=True, |
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# TODO: extract_required_kwarg could be converted to a convertor |
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) |
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