mirror of https://github.com/pypa/pip
139 lines
4.3 KiB
Python
139 lines
4.3 KiB
Python
# This file is dual licensed under the terms of the Apache License, Version
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# 2.0, and the BSD License. See the LICENSE file in the root of this repository
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# for complete details.
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from __future__ import absolute_import, division, print_function
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import re
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from ._typing import TYPE_CHECKING, cast
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from .tags import Tag, parse_tag
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from .version import InvalidVersion, Version
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if TYPE_CHECKING: # pragma: no cover
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from typing import FrozenSet, NewType, Tuple, Union
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BuildTag = Union[Tuple[()], Tuple[int, str]]
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NormalizedName = NewType("NormalizedName", str)
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else:
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BuildTag = tuple
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NormalizedName = str
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class InvalidWheelFilename(ValueError):
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"""
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An invalid wheel filename was found, users should refer to PEP 427.
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"""
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class InvalidSdistFilename(ValueError):
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"""
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An invalid sdist filename was found, users should refer to the packaging user guide.
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"""
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_canonicalize_regex = re.compile(r"[-_.]+")
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# PEP 427: The build number must start with a digit.
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_build_tag_regex = re.compile(r"(\d+)(.*)")
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def canonicalize_name(name):
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# type: (str) -> NormalizedName
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# This is taken from PEP 503.
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value = _canonicalize_regex.sub("-", name).lower()
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return cast(NormalizedName, value)
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def canonicalize_version(version):
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# type: (Union[Version, str]) -> Union[Version, str]
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"""
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This is very similar to Version.__str__, but has one subtle difference
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with the way it handles the release segment.
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"""
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if not isinstance(version, Version):
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try:
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version = Version(version)
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except InvalidVersion:
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# Legacy versions cannot be normalized
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return version
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parts = []
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# Epoch
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if version.epoch != 0:
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parts.append("{0}!".format(version.epoch))
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# Release segment
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# NB: This strips trailing '.0's to normalize
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parts.append(re.sub(r"(\.0)+$", "", ".".join(str(x) for x in version.release)))
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# Pre-release
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if version.pre is not None:
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parts.append("".join(str(x) for x in version.pre))
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# Post-release
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if version.post is not None:
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parts.append(".post{0}".format(version.post))
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# Development release
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if version.dev is not None:
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parts.append(".dev{0}".format(version.dev))
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# Local version segment
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if version.local is not None:
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parts.append("+{0}".format(version.local))
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return "".join(parts)
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def parse_wheel_filename(filename):
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# type: (str) -> Tuple[NormalizedName, Version, BuildTag, FrozenSet[Tag]]
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if not filename.endswith(".whl"):
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raise InvalidWheelFilename(
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"Invalid wheel filename (extension must be '.whl'): {0}".format(filename)
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)
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filename = filename[:-4]
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dashes = filename.count("-")
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if dashes not in (4, 5):
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raise InvalidWheelFilename(
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"Invalid wheel filename (wrong number of parts): {0}".format(filename)
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)
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parts = filename.split("-", dashes - 2)
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name_part = parts[0]
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# See PEP 427 for the rules on escaping the project name
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if "__" in name_part or re.match(r"^[\w\d._]*$", name_part, re.UNICODE) is None:
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raise InvalidWheelFilename("Invalid project name: {0}".format(filename))
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name = canonicalize_name(name_part)
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version = Version(parts[1])
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if dashes == 5:
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build_part = parts[2]
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build_match = _build_tag_regex.match(build_part)
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if build_match is None:
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raise InvalidWheelFilename(
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"Invalid build number: {0} in '{1}'".format(build_part, filename)
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)
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build = cast(BuildTag, (int(build_match.group(1)), build_match.group(2)))
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else:
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build = ()
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tags = parse_tag(parts[-1])
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return (name, version, build, tags)
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def parse_sdist_filename(filename):
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# type: (str) -> Tuple[NormalizedName, Version]
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if not filename.endswith(".tar.gz"):
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raise InvalidSdistFilename(
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"Invalid sdist filename (extension must be '.tar.gz'): {0}".format(filename)
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)
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# We are requiring a PEP 440 version, which cannot contain dashes,
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# so we split on the last dash.
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name_part, sep, version_part = filename[:-7].rpartition("-")
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if not sep:
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raise InvalidSdistFilename("Invalid sdist filename: {0}".format(filename))
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name = canonicalize_name(name_part)
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version = Version(version_part)
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return (name, version)
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