564 lines
16 KiB
Python
564 lines
16 KiB
Python
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# 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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"""
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.. testsetup::
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from packaging.version import parse, Version
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"""
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import itertools
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import re
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from typing import Any, Callable, NamedTuple, Optional, SupportsInt, Tuple, Union
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from ._structures import Infinity, InfinityType, NegativeInfinity, NegativeInfinityType
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__all__ = ["VERSION_PATTERN", "parse", "Version", "InvalidVersion"]
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LocalType = Tuple[Union[int, str], ...]
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CmpPrePostDevType = Union[InfinityType, NegativeInfinityType, Tuple[str, int]]
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CmpLocalType = Union[
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NegativeInfinityType,
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Tuple[Union[Tuple[int, str], Tuple[NegativeInfinityType, Union[int, str]]], ...],
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]
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CmpKey = Tuple[
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int,
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Tuple[int, ...],
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CmpPrePostDevType,
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CmpPrePostDevType,
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CmpPrePostDevType,
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CmpLocalType,
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]
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VersionComparisonMethod = Callable[[CmpKey, CmpKey], bool]
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class _Version(NamedTuple):
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epoch: int
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release: Tuple[int, ...]
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dev: Optional[Tuple[str, int]]
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pre: Optional[Tuple[str, int]]
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post: Optional[Tuple[str, int]]
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local: Optional[LocalType]
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def parse(version: str) -> "Version":
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"""Parse the given version string.
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>>> parse('1.0.dev1')
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<Version('1.0.dev1')>
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:param version: The version string to parse.
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:raises InvalidVersion: When the version string is not a valid version.
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"""
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return Version(version)
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class InvalidVersion(ValueError):
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"""Raised when a version string is not a valid version.
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>>> Version("invalid")
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Traceback (most recent call last):
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...
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packaging.version.InvalidVersion: Invalid version: 'invalid'
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"""
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class _BaseVersion:
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_key: Tuple[Any, ...]
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def __hash__(self) -> int:
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return hash(self._key)
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# Please keep the duplicated `isinstance` check
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# in the six comparisons hereunder
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# unless you find a way to avoid adding overhead function calls.
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def __lt__(self, other: "_BaseVersion") -> bool:
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if not isinstance(other, _BaseVersion):
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return NotImplemented
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return self._key < other._key
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def __le__(self, other: "_BaseVersion") -> bool:
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if not isinstance(other, _BaseVersion):
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return NotImplemented
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return self._key <= other._key
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def __eq__(self, other: object) -> bool:
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if not isinstance(other, _BaseVersion):
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return NotImplemented
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return self._key == other._key
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def __ge__(self, other: "_BaseVersion") -> bool:
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if not isinstance(other, _BaseVersion):
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return NotImplemented
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return self._key >= other._key
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def __gt__(self, other: "_BaseVersion") -> bool:
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if not isinstance(other, _BaseVersion):
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return NotImplemented
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return self._key > other._key
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def __ne__(self, other: object) -> bool:
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if not isinstance(other, _BaseVersion):
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return NotImplemented
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return self._key != other._key
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# Deliberately not anchored to the start and end of the string, to make it
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# easier for 3rd party code to reuse
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_VERSION_PATTERN = r"""
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v?
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(?:
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(?:(?P<epoch>[0-9]+)!)? # epoch
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(?P<release>[0-9]+(?:\.[0-9]+)*) # release segment
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(?P<pre> # pre-release
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[-_\.]?
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(?P<pre_l>alpha|a|beta|b|preview|pre|c|rc)
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[-_\.]?
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(?P<pre_n>[0-9]+)?
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)?
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(?P<post> # post release
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(?:-(?P<post_n1>[0-9]+))
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(?:
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[-_\.]?
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(?P<post_l>post|rev|r)
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[-_\.]?
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(?P<post_n2>[0-9]+)?
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)
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)?
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(?P<dev> # dev release
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[-_\.]?
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(?P<dev_l>dev)
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[-_\.]?
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(?P<dev_n>[0-9]+)?
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)?
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)
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(?:\+(?P<local>[a-z0-9]+(?:[-_\.][a-z0-9]+)*))? # local version
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"""
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VERSION_PATTERN = _VERSION_PATTERN
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"""
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A string containing the regular expression used to match a valid version.
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The pattern is not anchored at either end, and is intended for embedding in larger
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expressions (for example, matching a version number as part of a file name). The
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regular expression should be compiled with the ``re.VERBOSE`` and ``re.IGNORECASE``
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flags set.
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:meta hide-value:
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"""
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class Version(_BaseVersion):
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"""This class abstracts handling of a project's versions.
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A :class:`Version` instance is comparison aware and can be compared and
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sorted using the standard Python interfaces.
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>>> v1 = Version("1.0a5")
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>>> v2 = Version("1.0")
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>>> v1
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<Version('1.0a5')>
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>>> v2
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<Version('1.0')>
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>>> v1 < v2
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True
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>>> v1 == v2
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False
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>>> v1 > v2
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False
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>>> v1 >= v2
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False
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>>> v1 <= v2
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True
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"""
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_regex = re.compile(r"^\s*" + VERSION_PATTERN + r"\s*$", re.VERBOSE | re.IGNORECASE)
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_key: CmpKey
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def __init__(self, version: str) -> None:
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"""Initialize a Version object.
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:param version:
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The string representation of a version which will be parsed and normalized
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before use.
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:raises InvalidVersion:
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If the ``version`` does not conform to PEP 440 in any way then this
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exception will be raised.
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"""
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# Validate the version and parse it into pieces
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match = self._regex.search(version)
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if not match:
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raise InvalidVersion(f"Invalid version: '{version}'")
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# Store the parsed out pieces of the version
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self._version = _Version(
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epoch=int(match.group("epoch")) if match.group("epoch") else 0,
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release=tuple(int(i) for i in match.group("release").split(".")),
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pre=_parse_letter_version(match.group("pre_l"), match.group("pre_n")),
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post=_parse_letter_version(
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match.group("post_l"), match.group("post_n1") or match.group("post_n2")
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),
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dev=_parse_letter_version(match.group("dev_l"), match.group("dev_n")),
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local=_parse_local_version(match.group("local")),
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)
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# Generate a key which will be used for sorting
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self._key = _cmpkey(
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self._version.epoch,
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self._version.release,
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self._version.pre,
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self._version.post,
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self._version.dev,
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self._version.local,
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)
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def __repr__(self) -> str:
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"""A representation of the Version that shows all internal state.
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>>> Version('1.0.0')
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<Version('1.0.0')>
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"""
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return f"<Version('{self}')>"
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def __str__(self) -> str:
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"""A string representation of the version that can be rounded-tripped.
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>>> str(Version("1.0a5"))
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'1.0a5'
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"""
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parts = []
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# Epoch
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if self.epoch != 0:
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parts.append(f"{self.epoch}!")
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# Release segment
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parts.append(".".join(str(x) for x in self.release))
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# Pre-release
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if self.pre is not None:
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parts.append("".join(str(x) for x in self.pre))
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# Post-release
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if self.post is not None:
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parts.append(f".post{self.post}")
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# Development release
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if self.dev is not None:
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parts.append(f".dev{self.dev}")
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# Local version segment
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if self.local is not None:
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parts.append(f"+{self.local}")
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return "".join(parts)
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@property
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def epoch(self) -> int:
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"""The epoch of the version.
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>>> Version("2.0.0").epoch
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0
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>>> Version("1!2.0.0").epoch
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1
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"""
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return self._version.epoch
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@property
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def release(self) -> Tuple[int, ...]:
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"""The components of the "release" segment of the version.
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>>> Version("1.2.3").release
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(1, 2, 3)
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>>> Version("2.0.0").release
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(2, 0, 0)
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>>> Version("1!2.0.0.post0").release
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(2, 0, 0)
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Includes trailing zeroes but not the epoch or any pre-release / development /
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post-release suffixes.
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"""
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return self._version.release
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@property
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def pre(self) -> Optional[Tuple[str, int]]:
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"""The pre-release segment of the version.
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>>> print(Version("1.2.3").pre)
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None
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>>> Version("1.2.3a1").pre
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('a', 1)
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>>> Version("1.2.3b1").pre
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('b', 1)
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>>> Version("1.2.3rc1").pre
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('rc', 1)
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"""
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return self._version.pre
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@property
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def post(self) -> Optional[int]:
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"""The post-release number of the version.
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>>> print(Version("1.2.3").post)
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None
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>>> Version("1.2.3.post1").post
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1
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"""
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return self._version.post[1] if self._version.post else None
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@property
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def dev(self) -> Optional[int]:
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"""The development number of the version.
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>>> print(Version("1.2.3").dev)
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None
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>>> Version("1.2.3.dev1").dev
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1
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"""
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return self._version.dev[1] if self._version.dev else None
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@property
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def local(self) -> Optional[str]:
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"""The local version segment of the version.
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>>> print(Version("1.2.3").local)
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None
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>>> Version("1.2.3+abc").local
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'abc'
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"""
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if self._version.local:
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return ".".join(str(x) for x in self._version.local)
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else:
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return None
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@property
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def public(self) -> str:
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"""The public portion of the version.
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>>> Version("1.2.3").public
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'1.2.3'
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>>> Version("1.2.3+abc").public
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'1.2.3'
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>>> Version("1.2.3+abc.dev1").public
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'1.2.3'
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"""
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return str(self).split("+", 1)[0]
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@property
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def base_version(self) -> str:
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"""The "base version" of the version.
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>>> Version("1.2.3").base_version
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'1.2.3'
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>>> Version("1.2.3+abc").base_version
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'1.2.3'
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>>> Version("1!1.2.3+abc.dev1").base_version
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'1!1.2.3'
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The "base version" is the public version of the project without any pre or post
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release markers.
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"""
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parts = []
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# Epoch
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if self.epoch != 0:
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parts.append(f"{self.epoch}!")
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# Release segment
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parts.append(".".join(str(x) for x in self.release))
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return "".join(parts)
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@property
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def is_prerelease(self) -> bool:
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"""Whether this version is a pre-release.
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>>> Version("1.2.3").is_prerelease
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False
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>>> Version("1.2.3a1").is_prerelease
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True
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>>> Version("1.2.3b1").is_prerelease
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True
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>>> Version("1.2.3rc1").is_prerelease
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True
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>>> Version("1.2.3dev1").is_prerelease
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True
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"""
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return self.dev is not None or self.pre is not None
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@property
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def is_postrelease(self) -> bool:
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"""Whether this version is a post-release.
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>>> Version("1.2.3").is_postrelease
|
||
|
|
False
|
||
|
|
>>> Version("1.2.3.post1").is_postrelease
|
||
|
|
True
|
||
|
|
"""
|
||
|
|
return self.post is not None
|
||
|
|
|
||
|
|
@property
|
||
|
|
def is_devrelease(self) -> bool:
|
||
|
|
"""Whether this version is a development release.
|
||
|
|
|
||
|
|
>>> Version("1.2.3").is_devrelease
|
||
|
|
False
|
||
|
|
>>> Version("1.2.3.dev1").is_devrelease
|
||
|
|
True
|
||
|
|
"""
|
||
|
|
return self.dev is not None
|
||
|
|
|
||
|
|
@property
|
||
|
|
def major(self) -> int:
|
||
|
|
"""The first item of :attr:`release` or ``0`` if unavailable.
|
||
|
|
|
||
|
|
>>> Version("1.2.3").major
|
||
|
|
1
|
||
|
|
"""
|
||
|
|
return self.release[0] if len(self.release) >= 1 else 0
|
||
|
|
|
||
|
|
@property
|
||
|
|
def minor(self) -> int:
|
||
|
|
"""The second item of :attr:`release` or ``0`` if unavailable.
|
||
|
|
|
||
|
|
>>> Version("1.2.3").minor
|
||
|
|
2
|
||
|
|
>>> Version("1").minor
|
||
|
|
0
|
||
|
|
"""
|
||
|
|
return self.release[1] if len(self.release) >= 2 else 0
|
||
|
|
|
||
|
|
@property
|
||
|
|
def micro(self) -> int:
|
||
|
|
"""The third item of :attr:`release` or ``0`` if unavailable.
|
||
|
|
|
||
|
|
>>> Version("1.2.3").micro
|
||
|
|
3
|
||
|
|
>>> Version("1").micro
|
||
|
|
0
|
||
|
|
"""
|
||
|
|
return self.release[2] if len(self.release) >= 3 else 0
|
||
|
|
|
||
|
|
|
||
|
|
def _parse_letter_version(
|
||
|
|
letter: Optional[str], number: Union[str, bytes, SupportsInt, None]
|
||
|
|
) -> Optional[Tuple[str, int]]:
|
||
|
|
|
||
|
|
if letter:
|
||
|
|
# We consider there to be an implicit 0 in a pre-release if there is
|
||
|
|
# not a numeral associated with it.
|
||
|
|
if number is None:
|
||
|
|
number = 0
|
||
|
|
|
||
|
|
# We normalize any letters to their lower case form
|
||
|
|
letter = letter.lower()
|
||
|
|
|
||
|
|
# We consider some words to be alternate spellings of other words and
|
||
|
|
# in those cases we want to normalize the spellings to our preferred
|
||
|
|
# spelling.
|
||
|
|
if letter == "alpha":
|
||
|
|
letter = "a"
|
||
|
|
elif letter == "beta":
|
||
|
|
letter = "b"
|
||
|
|
elif letter in ["c", "pre", "preview"]:
|
||
|
|
letter = "rc"
|
||
|
|
elif letter in ["rev", "r"]:
|
||
|
|
letter = "post"
|
||
|
|
|
||
|
|
return letter, int(number)
|
||
|
|
if not letter and number:
|
||
|
|
# We assume if we are given a number, but we are not given a letter
|
||
|
|
# then this is using the implicit post release syntax (e.g. 1.0-1)
|
||
|
|
letter = "post"
|
||
|
|
|
||
|
|
return letter, int(number)
|
||
|
|
|
||
|
|
return None
|
||
|
|
|
||
|
|
|
||
|
|
_local_version_separators = re.compile(r"[\._-]")
|
||
|
|
|
||
|
|
|
||
|
|
def _parse_local_version(local: Optional[str]) -> Optional[LocalType]:
|
||
|
|
"""
|
||
|
|
Takes a string like abc.1.twelve and turns it into ("abc", 1, "twelve").
|
||
|
|
"""
|
||
|
|
if local is not None:
|
||
|
|
return tuple(
|
||
|
|
part.lower() if not part.isdigit() else int(part)
|
||
|
|
for part in _local_version_separators.split(local)
|
||
|
|
)
|
||
|
|
return None
|
||
|
|
|
||
|
|
|
||
|
|
def _cmpkey(
|
||
|
|
epoch: int,
|
||
|
|
release: Tuple[int, ...],
|
||
|
|
pre: Optional[Tuple[str, int]],
|
||
|
|
post: Optional[Tuple[str, int]],
|
||
|
|
dev: Optional[Tuple[str, int]],
|
||
|
|
local: Optional[LocalType],
|
||
|
|
) -> CmpKey:
|
||
|
|
|
||
|
|
# When we compare a release version, we want to compare it with all of the
|
||
|
|
# trailing zeros removed. So we'll use a reverse the list, drop all the now
|
||
|
|
# leading zeros until we come to something non zero, then take the rest
|
||
|
|
# re-reverse it back into the correct order and make it a tuple and use
|
||
|
|
# that for our sorting key.
|
||
|
|
_release = tuple(
|
||
|
|
reversed(list(itertools.dropwhile(lambda x: x == 0, reversed(release))))
|
||
|
|
)
|
||
|
|
|
||
|
|
# We need to "trick" the sorting algorithm to put 1.0.dev0 before 1.0a0.
|
||
|
|
# We'll do this by abusing the pre segment, but we _only_ want to do this
|
||
|
|
# if there is not a pre or a post segment. If we have one of those then
|
||
|
|
# the normal sorting rules will handle this case correctly.
|
||
|
|
if pre is None and post is None and dev is not None:
|
||
|
|
_pre: CmpPrePostDevType = NegativeInfinity
|
||
|
|
# Versions without a pre-release (except as noted above) should sort after
|
||
|
|
# those with one.
|
||
|
|
elif pre is None:
|
||
|
|
_pre = Infinity
|
||
|
|
else:
|
||
|
|
_pre = pre
|
||
|
|
|
||
|
|
# Versions without a post segment should sort before those with one.
|
||
|
|
if post is None:
|
||
|
|
_post: CmpPrePostDevType = NegativeInfinity
|
||
|
|
|
||
|
|
else:
|
||
|
|
_post = post
|
||
|
|
|
||
|
|
# Versions without a development segment should sort after those with one.
|
||
|
|
if dev is None:
|
||
|
|
_dev: CmpPrePostDevType = Infinity
|
||
|
|
|
||
|
|
else:
|
||
|
|
_dev = dev
|
||
|
|
|
||
|
|
if local is None:
|
||
|
|
# Versions without a local segment should sort before those with one.
|
||
|
|
_local: CmpLocalType = NegativeInfinity
|
||
|
|
else:
|
||
|
|
# Versions with a local segment need that segment parsed to implement
|
||
|
|
# the sorting rules in PEP440.
|
||
|
|
# - Alpha numeric segments sort before numeric segments
|
||
|
|
# - Alpha numeric segments sort lexicographically
|
||
|
|
# - Numeric segments sort numerically
|
||
|
|
# - Shorter versions sort before longer versions when the prefixes
|
||
|
|
# match exactly
|
||
|
|
_local = tuple(
|
||
|
|
(i, "") if isinstance(i, int) else (NegativeInfinity, i) for i in local
|
||
|
|
)
|
||
|
|
|
||
|
|
return epoch, _release, _pre, _post, _dev, _local
|