93 lines
3.5 KiB
Python
93 lines
3.5 KiB
Python
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"""Represents a wheel file and provides access to the various parts of the
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name that have meaning.
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"""
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import re
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from typing import Dict, Iterable, List
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from pip._vendor.packaging.tags import Tag
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from pip._internal.exceptions import InvalidWheelFilename
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class Wheel:
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"""A wheel file"""
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wheel_file_re = re.compile(
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r"""^(?P<namever>(?P<name>.+?)-(?P<ver>.*?))
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((-(?P<build>\d[^-]*?))?-(?P<pyver>.+?)-(?P<abi>.+?)-(?P<plat>.+?)
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\.whl|\.dist-info)$""",
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re.VERBOSE
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)
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def __init__(self, filename: str) -> None:
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"""
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:raises InvalidWheelFilename: when the filename is invalid for a wheel
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"""
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wheel_info = self.wheel_file_re.match(filename)
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if not wheel_info:
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raise InvalidWheelFilename(
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f"{filename} is not a valid wheel filename."
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)
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self.filename = filename
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self.name = wheel_info.group('name').replace('_', '-')
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# we'll assume "_" means "-" due to wheel naming scheme
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# (https://github.com/pypa/pip/issues/1150)
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self.version = wheel_info.group('ver').replace('_', '-')
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self.build_tag = wheel_info.group('build')
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self.pyversions = wheel_info.group('pyver').split('.')
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self.abis = wheel_info.group('abi').split('.')
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self.plats = wheel_info.group('plat').split('.')
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# All the tag combinations from this file
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self.file_tags = {
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Tag(x, y, z) for x in self.pyversions
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for y in self.abis for z in self.plats
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}
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def get_formatted_file_tags(self) -> List[str]:
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"""Return the wheel's tags as a sorted list of strings."""
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return sorted(str(tag) for tag in self.file_tags)
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def support_index_min(self, tags: List[Tag]) -> int:
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"""Return the lowest index that one of the wheel's file_tag combinations
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achieves in the given list of supported tags.
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For example, if there are 8 supported tags and one of the file tags
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is first in the list, then return 0.
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:param tags: the PEP 425 tags to check the wheel against, in order
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with most preferred first.
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:raises ValueError: If none of the wheel's file tags match one of
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the supported tags.
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"""
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return min(tags.index(tag) for tag in self.file_tags if tag in tags)
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def find_most_preferred_tag(
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self, tags: List[Tag], tag_to_priority: Dict[Tag, int]
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) -> int:
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"""Return the priority of the most preferred tag that one of the wheel's file
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tag combinations achieves in the given list of supported tags using the given
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tag_to_priority mapping, where lower priorities are more-preferred.
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This is used in place of support_index_min in some cases in order to avoid
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an expensive linear scan of a large list of tags.
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:param tags: the PEP 425 tags to check the wheel against.
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:param tag_to_priority: a mapping from tag to priority of that tag, where
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lower is more preferred.
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:raises ValueError: If none of the wheel's file tags match one of
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the supported tags.
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"""
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return min(
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tag_to_priority[tag] for tag in self.file_tags if tag in tag_to_priority
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)
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def supported(self, tags: Iterable[Tag]) -> bool:
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"""Return whether the wheel is compatible with one of the given tags.
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:param tags: the PEP 425 tags to check the wheel against.
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"""
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return not self.file_tags.isdisjoint(tags)
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