1018 lines
39 KiB
Python
1018 lines
39 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.specifiers import Specifier, SpecifierSet, InvalidSpecifier
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from packaging.version import Version
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"""
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import abc
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import itertools
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import re
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from typing import Callable, Iterable, Iterator, List, Optional, Tuple, TypeVar, Union
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from .utils import canonicalize_version
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from .version import Version
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UnparsedVersion = Union[Version, str]
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UnparsedVersionVar = TypeVar("UnparsedVersionVar", bound=UnparsedVersion)
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CallableOperator = Callable[[Version, str], bool]
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def _coerce_version(version: UnparsedVersion) -> Version:
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if not isinstance(version, Version):
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version = Version(version)
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return version
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class InvalidSpecifier(ValueError):
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"""
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Raised when attempting to create a :class:`Specifier` with a specifier
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string that is invalid.
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>>> Specifier("lolwat")
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Traceback (most recent call last):
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...
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packaging.specifiers.InvalidSpecifier: Invalid specifier: 'lolwat'
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"""
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class BaseSpecifier(metaclass=abc.ABCMeta):
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@abc.abstractmethod
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def __str__(self) -> str:
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"""
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Returns the str representation of this Specifier-like object. This
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should be representative of the Specifier itself.
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"""
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@abc.abstractmethod
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def __hash__(self) -> int:
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"""
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Returns a hash value for this Specifier-like object.
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"""
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@abc.abstractmethod
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def __eq__(self, other: object) -> bool:
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"""
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Returns a boolean representing whether or not the two Specifier-like
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objects are equal.
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:param other: The other object to check against.
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"""
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@property
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@abc.abstractmethod
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def prereleases(self) -> Optional[bool]:
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"""Whether or not pre-releases as a whole are allowed.
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This can be set to either ``True`` or ``False`` to explicitly enable or disable
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prereleases or it can be set to ``None`` (the default) to use default semantics.
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"""
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@prereleases.setter
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def prereleases(self, value: bool) -> None:
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"""Setter for :attr:`prereleases`.
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:param value: The value to set.
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"""
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@abc.abstractmethod
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def contains(self, item: str, prereleases: Optional[bool] = None) -> bool:
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"""
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Determines if the given item is contained within this specifier.
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"""
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@abc.abstractmethod
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def filter(
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self, iterable: Iterable[UnparsedVersionVar], prereleases: Optional[bool] = None
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) -> Iterator[UnparsedVersionVar]:
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"""
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Takes an iterable of items and filters them so that only items which
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are contained within this specifier are allowed in it.
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"""
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class Specifier(BaseSpecifier):
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"""This class abstracts handling of version specifiers.
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.. tip::
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It is generally not required to instantiate this manually. You should instead
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prefer to work with :class:`SpecifierSet` instead, which can parse
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comma-separated version specifiers (which is what package metadata contains).
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"""
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_operator_regex_str = r"""
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(?P<operator>(~=|==|!=|<=|>=|<|>|===))
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"""
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_version_regex_str = r"""
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(?P<version>
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(?:
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# The identity operators allow for an escape hatch that will
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# do an exact string match of the version you wish to install.
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# This will not be parsed by PEP 440 and we cannot determine
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# any semantic meaning from it. This operator is discouraged
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# but included entirely as an escape hatch.
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(?<====) # Only match for the identity operator
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\s*
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[^\s;)]* # The arbitrary version can be just about anything,
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# we match everything except for whitespace, a
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# semi-colon for marker support, and a closing paren
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# since versions can be enclosed in them.
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)
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(?:
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# The (non)equality operators allow for wild card and local
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# versions to be specified so we have to define these two
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# operators separately to enable that.
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(?<===|!=) # Only match for equals and not equals
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\s*
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v?
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(?:[0-9]+!)? # epoch
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[0-9]+(?:\.[0-9]+)* # release
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# You cannot use a wild card and a pre-release, post-release, a dev or
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# local version together so group them with a | and make them optional.
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(?:
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\.\* # Wild card syntax of .*
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(?: # pre release
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[-_\.]?
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(alpha|beta|preview|pre|a|b|c|rc)
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[-_\.]?
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[0-9]*
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)?
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(?: # post release
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(?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
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)?
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(?:[-_\.]?dev[-_\.]?[0-9]*)? # dev release
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(?:\+[a-z0-9]+(?:[-_\.][a-z0-9]+)*)? # local
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)?
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)
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(?:
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# The compatible operator requires at least two digits in the
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# release segment.
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(?<=~=) # Only match for the compatible operator
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\s*
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v?
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(?:[0-9]+!)? # epoch
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[0-9]+(?:\.[0-9]+)+ # release (We have a + instead of a *)
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(?: # pre release
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[-_\.]?
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(alpha|beta|preview|pre|a|b|c|rc)
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[-_\.]?
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[0-9]*
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)?
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(?: # post release
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(?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
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)?
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(?:[-_\.]?dev[-_\.]?[0-9]*)? # dev release
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)
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(?:
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# All other operators only allow a sub set of what the
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# (non)equality operators do. Specifically they do not allow
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# local versions to be specified nor do they allow the prefix
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# matching wild cards.
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(?<!==|!=|~=) # We have special cases for these
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# operators so we want to make sure they
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# don't match here.
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\s*
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v?
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(?:[0-9]+!)? # epoch
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[0-9]+(?:\.[0-9]+)* # release
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(?: # pre release
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[-_\.]?
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(alpha|beta|preview|pre|a|b|c|rc)
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[-_\.]?
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[0-9]*
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)?
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(?: # post release
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(?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
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)?
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(?:[-_\.]?dev[-_\.]?[0-9]*)? # dev release
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)
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)
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"""
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_regex = re.compile(
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r"^\s*" + _operator_regex_str + _version_regex_str + r"\s*$",
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re.VERBOSE | re.IGNORECASE,
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)
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_operators = {
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"~=": "compatible",
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"==": "equal",
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"!=": "not_equal",
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"<=": "less_than_equal",
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">=": "greater_than_equal",
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"<": "less_than",
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">": "greater_than",
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"===": "arbitrary",
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}
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def __init__(self, spec: str = "", prereleases: Optional[bool] = None) -> None:
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"""Initialize a Specifier instance.
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:param spec:
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The string representation of a specifier which will be parsed and
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normalized before use.
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:param prereleases:
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This tells the specifier if it should accept prerelease versions if
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applicable or not. The default of ``None`` will autodetect it from the
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given specifiers.
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:raises InvalidSpecifier:
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If the given specifier is invalid (i.e. bad syntax).
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"""
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match = self._regex.search(spec)
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if not match:
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raise InvalidSpecifier(f"Invalid specifier: '{spec}'")
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self._spec: Tuple[str, str] = (
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match.group("operator").strip(),
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match.group("version").strip(),
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)
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# Store whether or not this Specifier should accept prereleases
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self._prereleases = prereleases
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# https://github.com/python/mypy/pull/13475#pullrequestreview-1079784515
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@property # type: ignore[override]
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def prereleases(self) -> bool:
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# If there is an explicit prereleases set for this, then we'll just
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# blindly use that.
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if self._prereleases is not None:
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return self._prereleases
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# Look at all of our specifiers and determine if they are inclusive
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# operators, and if they are if they are including an explicit
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# prerelease.
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operator, version = self._spec
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if operator in ["==", ">=", "<=", "~=", "==="]:
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# The == specifier can include a trailing .*, if it does we
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# want to remove before parsing.
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if operator == "==" and version.endswith(".*"):
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version = version[:-2]
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# Parse the version, and if it is a pre-release than this
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# specifier allows pre-releases.
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if Version(version).is_prerelease:
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return True
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return False
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@prereleases.setter
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def prereleases(self, value: bool) -> None:
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self._prereleases = value
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@property
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def operator(self) -> str:
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"""The operator of this specifier.
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>>> Specifier("==1.2.3").operator
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'=='
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"""
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return self._spec[0]
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@property
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def version(self) -> str:
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"""The version of this specifier.
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>>> Specifier("==1.2.3").version
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'1.2.3'
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"""
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return self._spec[1]
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def __repr__(self) -> str:
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"""A representation of the Specifier that shows all internal state.
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>>> Specifier('>=1.0.0')
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<Specifier('>=1.0.0')>
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>>> Specifier('>=1.0.0', prereleases=False)
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<Specifier('>=1.0.0', prereleases=False)>
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>>> Specifier('>=1.0.0', prereleases=True)
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<Specifier('>=1.0.0', prereleases=True)>
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"""
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pre = (
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f", prereleases={self.prereleases!r}"
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if self._prereleases is not None
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else ""
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)
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return f"<{self.__class__.__name__}({str(self)!r}{pre})>"
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def __str__(self) -> str:
|
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"""A string representation of the Specifier that can be round-tripped.
|
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|
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>>> str(Specifier('>=1.0.0'))
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'>=1.0.0'
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>>> str(Specifier('>=1.0.0', prereleases=False))
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'>=1.0.0'
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"""
|
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return "{}{}".format(*self._spec)
|
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|
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||
|
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@property
|
||
|
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def _canonical_spec(self) -> Tuple[str, str]:
|
||
|
|
canonical_version = canonicalize_version(
|
||
|
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self._spec[1],
|
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|
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strip_trailing_zero=(self._spec[0] != "~="),
|
||
|
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)
|
||
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return self._spec[0], canonical_version
|
||
|
|
|
||
|
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def __hash__(self) -> int:
|
||
|
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return hash(self._canonical_spec)
|
||
|
|
|
||
|
|
def __eq__(self, other: object) -> bool:
|
||
|
|
"""Whether or not the two Specifier-like objects are equal.
|
||
|
|
|
||
|
|
:param other: The other object to check against.
|
||
|
|
|
||
|
|
The value of :attr:`prereleases` is ignored.
|
||
|
|
|
||
|
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>>> Specifier("==1.2.3") == Specifier("== 1.2.3.0")
|
||
|
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True
|
||
|
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>>> (Specifier("==1.2.3", prereleases=False) ==
|
||
|
|
... Specifier("==1.2.3", prereleases=True))
|
||
|
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True
|
||
|
|
>>> Specifier("==1.2.3") == "==1.2.3"
|
||
|
|
True
|
||
|
|
>>> Specifier("==1.2.3") == Specifier("==1.2.4")
|
||
|
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False
|
||
|
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>>> Specifier("==1.2.3") == Specifier("~=1.2.3")
|
||
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False
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||
|
|
"""
|
||
|
|
if isinstance(other, str):
|
||
|
|
try:
|
||
|
|
other = self.__class__(str(other))
|
||
|
|
except InvalidSpecifier:
|
||
|
|
return NotImplemented
|
||
|
|
elif not isinstance(other, self.__class__):
|
||
|
|
return NotImplemented
|
||
|
|
|
||
|
|
return self._canonical_spec == other._canonical_spec
|
||
|
|
|
||
|
|
def _get_operator(self, op: str) -> CallableOperator:
|
||
|
|
operator_callable: CallableOperator = getattr(
|
||
|
|
self, f"_compare_{self._operators[op]}"
|
||
|
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)
|
||
|
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return operator_callable
|
||
|
|
|
||
|
|
def _compare_compatible(self, prospective: Version, spec: str) -> bool:
|
||
|
|
|
||
|
|
# Compatible releases have an equivalent combination of >= and ==. That
|
||
|
|
# is that ~=2.2 is equivalent to >=2.2,==2.*. This allows us to
|
||
|
|
# implement this in terms of the other specifiers instead of
|
||
|
|
# implementing it ourselves. The only thing we need to do is construct
|
||
|
|
# the other specifiers.
|
||
|
|
|
||
|
|
# We want everything but the last item in the version, but we want to
|
||
|
|
# ignore suffix segments.
|
||
|
|
prefix = _version_join(
|
||
|
|
list(itertools.takewhile(_is_not_suffix, _version_split(spec)))[:-1]
|
||
|
|
)
|
||
|
|
|
||
|
|
# Add the prefix notation to the end of our string
|
||
|
|
prefix += ".*"
|
||
|
|
|
||
|
|
return self._get_operator(">=")(prospective, spec) and self._get_operator("==")(
|
||
|
|
prospective, prefix
|
||
|
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)
|
||
|
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|
||
|
|
def _compare_equal(self, prospective: Version, spec: str) -> bool:
|
||
|
|
|
||
|
|
# We need special logic to handle prefix matching
|
||
|
|
if spec.endswith(".*"):
|
||
|
|
# In the case of prefix matching we want to ignore local segment.
|
||
|
|
normalized_prospective = canonicalize_version(
|
||
|
|
prospective.public, strip_trailing_zero=False
|
||
|
|
)
|
||
|
|
# Get the normalized version string ignoring the trailing .*
|
||
|
|
normalized_spec = canonicalize_version(spec[:-2], strip_trailing_zero=False)
|
||
|
|
# Split the spec out by bangs and dots, and pretend that there is
|
||
|
|
# an implicit dot in between a release segment and a pre-release segment.
|
||
|
|
split_spec = _version_split(normalized_spec)
|
||
|
|
|
||
|
|
# Split the prospective version out by bangs and dots, and pretend
|
||
|
|
# that there is an implicit dot in between a release segment and
|
||
|
|
# a pre-release segment.
|
||
|
|
split_prospective = _version_split(normalized_prospective)
|
||
|
|
|
||
|
|
# 0-pad the prospective version before shortening it to get the correct
|
||
|
|
# shortened version.
|
||
|
|
padded_prospective, _ = _pad_version(split_prospective, split_spec)
|
||
|
|
|
||
|
|
# Shorten the prospective version to be the same length as the spec
|
||
|
|
# so that we can determine if the specifier is a prefix of the
|
||
|
|
# prospective version or not.
|
||
|
|
shortened_prospective = padded_prospective[: len(split_spec)]
|
||
|
|
|
||
|
|
return shortened_prospective == split_spec
|
||
|
|
else:
|
||
|
|
# Convert our spec string into a Version
|
||
|
|
spec_version = Version(spec)
|
||
|
|
|
||
|
|
# If the specifier does not have a local segment, then we want to
|
||
|
|
# act as if the prospective version also does not have a local
|
||
|
|
# segment.
|
||
|
|
if not spec_version.local:
|
||
|
|
prospective = Version(prospective.public)
|
||
|
|
|
||
|
|
return prospective == spec_version
|
||
|
|
|
||
|
|
def _compare_not_equal(self, prospective: Version, spec: str) -> bool:
|
||
|
|
return not self._compare_equal(prospective, spec)
|
||
|
|
|
||
|
|
def _compare_less_than_equal(self, prospective: Version, spec: str) -> bool:
|
||
|
|
|
||
|
|
# NB: Local version identifiers are NOT permitted in the version
|
||
|
|
# specifier, so local version labels can be universally removed from
|
||
|
|
# the prospective version.
|
||
|
|
return Version(prospective.public) <= Version(spec)
|
||
|
|
|
||
|
|
def _compare_greater_than_equal(self, prospective: Version, spec: str) -> bool:
|
||
|
|
|
||
|
|
# NB: Local version identifiers are NOT permitted in the version
|
||
|
|
# specifier, so local version labels can be universally removed from
|
||
|
|
# the prospective version.
|
||
|
|
return Version(prospective.public) >= Version(spec)
|
||
|
|
|
||
|
|
def _compare_less_than(self, prospective: Version, spec_str: str) -> bool:
|
||
|
|
|
||
|
|
# Convert our spec to a Version instance, since we'll want to work with
|
||
|
|
# it as a version.
|
||
|
|
spec = Version(spec_str)
|
||
|
|
|
||
|
|
# Check to see if the prospective version is less than the spec
|
||
|
|
# version. If it's not we can short circuit and just return False now
|
||
|
|
# instead of doing extra unneeded work.
|
||
|
|
if not prospective < spec:
|
||
|
|
return False
|
||
|
|
|
||
|
|
# This special case is here so that, unless the specifier itself
|
||
|
|
# includes is a pre-release version, that we do not accept pre-release
|
||
|
|
# versions for the version mentioned in the specifier (e.g. <3.1 should
|
||
|
|
# not match 3.1.dev0, but should match 3.0.dev0).
|
||
|
|
if not spec.is_prerelease and prospective.is_prerelease:
|
||
|
|
if Version(prospective.base_version) == Version(spec.base_version):
|
||
|
|
return False
|
||
|
|
|
||
|
|
# If we've gotten to here, it means that prospective version is both
|
||
|
|
# less than the spec version *and* it's not a pre-release of the same
|
||
|
|
# version in the spec.
|
||
|
|
return True
|
||
|
|
|
||
|
|
def _compare_greater_than(self, prospective: Version, spec_str: str) -> bool:
|
||
|
|
|
||
|
|
# Convert our spec to a Version instance, since we'll want to work with
|
||
|
|
# it as a version.
|
||
|
|
spec = Version(spec_str)
|
||
|
|
|
||
|
|
# Check to see if the prospective version is greater than the spec
|
||
|
|
# version. If it's not we can short circuit and just return False now
|
||
|
|
# instead of doing extra unneeded work.
|
||
|
|
if not prospective > spec:
|
||
|
|
return False
|
||
|
|
|
||
|
|
# This special case is here so that, unless the specifier itself
|
||
|
|
# includes is a post-release version, that we do not accept
|
||
|
|
# post-release versions for the version mentioned in the specifier
|
||
|
|
# (e.g. >3.1 should not match 3.0.post0, but should match 3.2.post0).
|
||
|
|
if not spec.is_postrelease and prospective.is_postrelease:
|
||
|
|
if Version(prospective.base_version) == Version(spec.base_version):
|
||
|
|
return False
|
||
|
|
|
||
|
|
# Ensure that we do not allow a local version of the version mentioned
|
||
|
|
# in the specifier, which is technically greater than, to match.
|
||
|
|
if prospective.local is not None:
|
||
|
|
if Version(prospective.base_version) == Version(spec.base_version):
|
||
|
|
return False
|
||
|
|
|
||
|
|
# If we've gotten to here, it means that prospective version is both
|
||
|
|
# greater than the spec version *and* it's not a pre-release of the
|
||
|
|
# same version in the spec.
|
||
|
|
return True
|
||
|
|
|
||
|
|
def _compare_arbitrary(self, prospective: Version, spec: str) -> bool:
|
||
|
|
return str(prospective).lower() == str(spec).lower()
|
||
|
|
|
||
|
|
def __contains__(self, item: Union[str, Version]) -> bool:
|
||
|
|
"""Return whether or not the item is contained in this specifier.
|
||
|
|
|
||
|
|
:param item: The item to check for.
|
||
|
|
|
||
|
|
This is used for the ``in`` operator and behaves the same as
|
||
|
|
:meth:`contains` with no ``prereleases`` argument passed.
|
||
|
|
|
||
|
|
>>> "1.2.3" in Specifier(">=1.2.3")
|
||
|
|
True
|
||
|
|
>>> Version("1.2.3") in Specifier(">=1.2.3")
|
||
|
|
True
|
||
|
|
>>> "1.0.0" in Specifier(">=1.2.3")
|
||
|
|
False
|
||
|
|
>>> "1.3.0a1" in Specifier(">=1.2.3")
|
||
|
|
False
|
||
|
|
>>> "1.3.0a1" in Specifier(">=1.2.3", prereleases=True)
|
||
|
|
True
|
||
|
|
"""
|
||
|
|
return self.contains(item)
|
||
|
|
|
||
|
|
def contains(
|
||
|
|
self, item: UnparsedVersion, prereleases: Optional[bool] = None
|
||
|
|
) -> bool:
|
||
|
|
"""Return whether or not the item is contained in this specifier.
|
||
|
|
|
||
|
|
:param item:
|
||
|
|
The item to check for, which can be a version string or a
|
||
|
|
:class:`Version` instance.
|
||
|
|
:param prereleases:
|
||
|
|
Whether or not to match prereleases with this Specifier. If set to
|
||
|
|
``None`` (the default), it uses :attr:`prereleases` to determine
|
||
|
|
whether or not prereleases are allowed.
|
||
|
|
|
||
|
|
>>> Specifier(">=1.2.3").contains("1.2.3")
|
||
|
|
True
|
||
|
|
>>> Specifier(">=1.2.3").contains(Version("1.2.3"))
|
||
|
|
True
|
||
|
|
>>> Specifier(">=1.2.3").contains("1.0.0")
|
||
|
|
False
|
||
|
|
>>> Specifier(">=1.2.3").contains("1.3.0a1")
|
||
|
|
False
|
||
|
|
>>> Specifier(">=1.2.3", prereleases=True).contains("1.3.0a1")
|
||
|
|
True
|
||
|
|
>>> Specifier(">=1.2.3").contains("1.3.0a1", prereleases=True)
|
||
|
|
True
|
||
|
|
"""
|
||
|
|
|
||
|
|
# Determine if prereleases are to be allowed or not.
|
||
|
|
if prereleases is None:
|
||
|
|
prereleases = self.prereleases
|
||
|
|
|
||
|
|
# Normalize item to a Version, this allows us to have a shortcut for
|
||
|
|
# "2.0" in Specifier(">=2")
|
||
|
|
normalized_item = _coerce_version(item)
|
||
|
|
|
||
|
|
# Determine if we should be supporting prereleases in this specifier
|
||
|
|
# or not, if we do not support prereleases than we can short circuit
|
||
|
|
# logic if this version is a prereleases.
|
||
|
|
if normalized_item.is_prerelease and not prereleases:
|
||
|
|
return False
|
||
|
|
|
||
|
|
# Actually do the comparison to determine if this item is contained
|
||
|
|
# within this Specifier or not.
|
||
|
|
operator_callable: CallableOperator = self._get_operator(self.operator)
|
||
|
|
return operator_callable(normalized_item, self.version)
|
||
|
|
|
||
|
|
def filter(
|
||
|
|
self, iterable: Iterable[UnparsedVersionVar], prereleases: Optional[bool] = None
|
||
|
|
) -> Iterator[UnparsedVersionVar]:
|
||
|
|
"""Filter items in the given iterable, that match the specifier.
|
||
|
|
|
||
|
|
:param iterable:
|
||
|
|
An iterable that can contain version strings and :class:`Version` instances.
|
||
|
|
The items in the iterable will be filtered according to the specifier.
|
||
|
|
:param prereleases:
|
||
|
|
Whether or not to allow prereleases in the returned iterator. If set to
|
||
|
|
``None`` (the default), it will be intelligently decide whether to allow
|
||
|
|
prereleases or not (based on the :attr:`prereleases` attribute, and
|
||
|
|
whether the only versions matching are prereleases).
|
||
|
|
|
||
|
|
This method is smarter than just ``filter(Specifier().contains, [...])``
|
||
|
|
because it implements the rule from :pep:`440` that a prerelease item
|
||
|
|
SHOULD be accepted if no other versions match the given specifier.
|
||
|
|
|
||
|
|
>>> list(Specifier(">=1.2.3").filter(["1.2", "1.3", "1.5a1"]))
|
||
|
|
['1.3']
|
||
|
|
>>> list(Specifier(">=1.2.3").filter(["1.2", "1.2.3", "1.3", Version("1.4")]))
|
||
|
|
['1.2.3', '1.3', <Version('1.4')>]
|
||
|
|
>>> list(Specifier(">=1.2.3").filter(["1.2", "1.5a1"]))
|
||
|
|
['1.5a1']
|
||
|
|
>>> list(Specifier(">=1.2.3").filter(["1.3", "1.5a1"], prereleases=True))
|
||
|
|
['1.3', '1.5a1']
|
||
|
|
>>> list(Specifier(">=1.2.3", prereleases=True).filter(["1.3", "1.5a1"]))
|
||
|
|
['1.3', '1.5a1']
|
||
|
|
"""
|
||
|
|
|
||
|
|
yielded = False
|
||
|
|
found_prereleases = []
|
||
|
|
|
||
|
|
kw = {"prereleases": prereleases if prereleases is not None else True}
|
||
|
|
|
||
|
|
# Attempt to iterate over all the values in the iterable and if any of
|
||
|
|
# them match, yield them.
|
||
|
|
for version in iterable:
|
||
|
|
parsed_version = _coerce_version(version)
|
||
|
|
|
||
|
|
if self.contains(parsed_version, **kw):
|
||
|
|
# If our version is a prerelease, and we were not set to allow
|
||
|
|
# prereleases, then we'll store it for later in case nothing
|
||
|
|
# else matches this specifier.
|
||
|
|
if parsed_version.is_prerelease and not (
|
||
|
|
prereleases or self.prereleases
|
||
|
|
):
|
||
|
|
found_prereleases.append(version)
|
||
|
|
# Either this is not a prerelease, or we should have been
|
||
|
|
# accepting prereleases from the beginning.
|
||
|
|
else:
|
||
|
|
yielded = True
|
||
|
|
yield version
|
||
|
|
|
||
|
|
# Now that we've iterated over everything, determine if we've yielded
|
||
|
|
# any values, and if we have not and we have any prereleases stored up
|
||
|
|
# then we will go ahead and yield the prereleases.
|
||
|
|
if not yielded and found_prereleases:
|
||
|
|
for version in found_prereleases:
|
||
|
|
yield version
|
||
|
|
|
||
|
|
|
||
|
|
_prefix_regex = re.compile(r"^([0-9]+)((?:a|b|c|rc)[0-9]+)$")
|
||
|
|
|
||
|
|
|
||
|
|
def _version_split(version: str) -> List[str]:
|
||
|
|
"""Split version into components.
|
||
|
|
|
||
|
|
The split components are intended for version comparison. The logic does
|
||
|
|
not attempt to retain the original version string, so joining the
|
||
|
|
components back with :func:`_version_join` may not produce the original
|
||
|
|
version string.
|
||
|
|
"""
|
||
|
|
result: List[str] = []
|
||
|
|
|
||
|
|
epoch, _, rest = version.rpartition("!")
|
||
|
|
result.append(epoch or "0")
|
||
|
|
|
||
|
|
for item in rest.split("."):
|
||
|
|
match = _prefix_regex.search(item)
|
||
|
|
if match:
|
||
|
|
result.extend(match.groups())
|
||
|
|
else:
|
||
|
|
result.append(item)
|
||
|
|
return result
|
||
|
|
|
||
|
|
|
||
|
|
def _version_join(components: List[str]) -> str:
|
||
|
|
"""Join split version components into a version string.
|
||
|
|
|
||
|
|
This function assumes the input came from :func:`_version_split`, where the
|
||
|
|
first component must be the epoch (either empty or numeric), and all other
|
||
|
|
components numeric.
|
||
|
|
"""
|
||
|
|
epoch, *rest = components
|
||
|
|
return f"{epoch}!{'.'.join(rest)}"
|
||
|
|
|
||
|
|
|
||
|
|
def _is_not_suffix(segment: str) -> bool:
|
||
|
|
return not any(
|
||
|
|
segment.startswith(prefix) for prefix in ("dev", "a", "b", "rc", "post")
|
||
|
|
)
|
||
|
|
|
||
|
|
|
||
|
|
def _pad_version(left: List[str], right: List[str]) -> Tuple[List[str], List[str]]:
|
||
|
|
left_split, right_split = [], []
|
||
|
|
|
||
|
|
# Get the release segment of our versions
|
||
|
|
left_split.append(list(itertools.takewhile(lambda x: x.isdigit(), left)))
|
||
|
|
right_split.append(list(itertools.takewhile(lambda x: x.isdigit(), right)))
|
||
|
|
|
||
|
|
# Get the rest of our versions
|
||
|
|
left_split.append(left[len(left_split[0]) :])
|
||
|
|
right_split.append(right[len(right_split[0]) :])
|
||
|
|
|
||
|
|
# Insert our padding
|
||
|
|
left_split.insert(1, ["0"] * max(0, len(right_split[0]) - len(left_split[0])))
|
||
|
|
right_split.insert(1, ["0"] * max(0, len(left_split[0]) - len(right_split[0])))
|
||
|
|
|
||
|
|
return (
|
||
|
|
list(itertools.chain.from_iterable(left_split)),
|
||
|
|
list(itertools.chain.from_iterable(right_split)),
|
||
|
|
)
|
||
|
|
|
||
|
|
|
||
|
|
class SpecifierSet(BaseSpecifier):
|
||
|
|
"""This class abstracts handling of a set of version specifiers.
|
||
|
|
|
||
|
|
It can be passed a single specifier (``>=3.0``), a comma-separated list of
|
||
|
|
specifiers (``>=3.0,!=3.1``), or no specifier at all.
|
||
|
|
"""
|
||
|
|
|
||
|
|
def __init__(
|
||
|
|
self, specifiers: str = "", prereleases: Optional[bool] = None
|
||
|
|
) -> None:
|
||
|
|
"""Initialize a SpecifierSet instance.
|
||
|
|
|
||
|
|
:param specifiers:
|
||
|
|
The string representation of a specifier or a comma-separated list of
|
||
|
|
specifiers which will be parsed and normalized before use.
|
||
|
|
:param prereleases:
|
||
|
|
This tells the SpecifierSet if it should accept prerelease versions if
|
||
|
|
applicable or not. The default of ``None`` will autodetect it from the
|
||
|
|
given specifiers.
|
||
|
|
|
||
|
|
:raises InvalidSpecifier:
|
||
|
|
If the given ``specifiers`` are not parseable than this exception will be
|
||
|
|
raised.
|
||
|
|
"""
|
||
|
|
|
||
|
|
# Split on `,` to break each individual specifier into it's own item, and
|
||
|
|
# strip each item to remove leading/trailing whitespace.
|
||
|
|
split_specifiers = [s.strip() for s in specifiers.split(",") if s.strip()]
|
||
|
|
|
||
|
|
# Make each individual specifier a Specifier and save in a frozen set for later.
|
||
|
|
self._specs = frozenset(map(Specifier, split_specifiers))
|
||
|
|
|
||
|
|
# Store our prereleases value so we can use it later to determine if
|
||
|
|
# we accept prereleases or not.
|
||
|
|
self._prereleases = prereleases
|
||
|
|
|
||
|
|
@property
|
||
|
|
def prereleases(self) -> Optional[bool]:
|
||
|
|
# If we have been given an explicit prerelease modifier, then we'll
|
||
|
|
# pass that through here.
|
||
|
|
if self._prereleases is not None:
|
||
|
|
return self._prereleases
|
||
|
|
|
||
|
|
# If we don't have any specifiers, and we don't have a forced value,
|
||
|
|
# then we'll just return None since we don't know if this should have
|
||
|
|
# pre-releases or not.
|
||
|
|
if not self._specs:
|
||
|
|
return None
|
||
|
|
|
||
|
|
# Otherwise we'll see if any of the given specifiers accept
|
||
|
|
# prereleases, if any of them do we'll return True, otherwise False.
|
||
|
|
return any(s.prereleases for s in self._specs)
|
||
|
|
|
||
|
|
@prereleases.setter
|
||
|
|
def prereleases(self, value: bool) -> None:
|
||
|
|
self._prereleases = value
|
||
|
|
|
||
|
|
def __repr__(self) -> str:
|
||
|
|
"""A representation of the specifier set that shows all internal state.
|
||
|
|
|
||
|
|
Note that the ordering of the individual specifiers within the set may not
|
||
|
|
match the input string.
|
||
|
|
|
||
|
|
>>> SpecifierSet('>=1.0.0,!=2.0.0')
|
||
|
|
<SpecifierSet('!=2.0.0,>=1.0.0')>
|
||
|
|
>>> SpecifierSet('>=1.0.0,!=2.0.0', prereleases=False)
|
||
|
|
<SpecifierSet('!=2.0.0,>=1.0.0', prereleases=False)>
|
||
|
|
>>> SpecifierSet('>=1.0.0,!=2.0.0', prereleases=True)
|
||
|
|
<SpecifierSet('!=2.0.0,>=1.0.0', prereleases=True)>
|
||
|
|
"""
|
||
|
|
pre = (
|
||
|
|
f", prereleases={self.prereleases!r}"
|
||
|
|
if self._prereleases is not None
|
||
|
|
else ""
|
||
|
|
)
|
||
|
|
|
||
|
|
return f"<SpecifierSet({str(self)!r}{pre})>"
|
||
|
|
|
||
|
|
def __str__(self) -> str:
|
||
|
|
"""A string representation of the specifier set that can be round-tripped.
|
||
|
|
|
||
|
|
Note that the ordering of the individual specifiers within the set may not
|
||
|
|
match the input string.
|
||
|
|
|
||
|
|
>>> str(SpecifierSet(">=1.0.0,!=1.0.1"))
|
||
|
|
'!=1.0.1,>=1.0.0'
|
||
|
|
>>> str(SpecifierSet(">=1.0.0,!=1.0.1", prereleases=False))
|
||
|
|
'!=1.0.1,>=1.0.0'
|
||
|
|
"""
|
||
|
|
return ",".join(sorted(str(s) for s in self._specs))
|
||
|
|
|
||
|
|
def __hash__(self) -> int:
|
||
|
|
return hash(self._specs)
|
||
|
|
|
||
|
|
def __and__(self, other: Union["SpecifierSet", str]) -> "SpecifierSet":
|
||
|
|
"""Return a SpecifierSet which is a combination of the two sets.
|
||
|
|
|
||
|
|
:param other: The other object to combine with.
|
||
|
|
|
||
|
|
>>> SpecifierSet(">=1.0.0,!=1.0.1") & '<=2.0.0,!=2.0.1'
|
||
|
|
<SpecifierSet('!=1.0.1,!=2.0.1,<=2.0.0,>=1.0.0')>
|
||
|
|
>>> SpecifierSet(">=1.0.0,!=1.0.1") & SpecifierSet('<=2.0.0,!=2.0.1')
|
||
|
|
<SpecifierSet('!=1.0.1,!=2.0.1,<=2.0.0,>=1.0.0')>
|
||
|
|
"""
|
||
|
|
if isinstance(other, str):
|
||
|
|
other = SpecifierSet(other)
|
||
|
|
elif not isinstance(other, SpecifierSet):
|
||
|
|
return NotImplemented
|
||
|
|
|
||
|
|
specifier = SpecifierSet()
|
||
|
|
specifier._specs = frozenset(self._specs | other._specs)
|
||
|
|
|
||
|
|
if self._prereleases is None and other._prereleases is not None:
|
||
|
|
specifier._prereleases = other._prereleases
|
||
|
|
elif self._prereleases is not None and other._prereleases is None:
|
||
|
|
specifier._prereleases = self._prereleases
|
||
|
|
elif self._prereleases == other._prereleases:
|
||
|
|
specifier._prereleases = self._prereleases
|
||
|
|
else:
|
||
|
|
raise ValueError(
|
||
|
|
"Cannot combine SpecifierSets with True and False prerelease "
|
||
|
|
"overrides."
|
||
|
|
)
|
||
|
|
|
||
|
|
return specifier
|
||
|
|
|
||
|
|
def __eq__(self, other: object) -> bool:
|
||
|
|
"""Whether or not the two SpecifierSet-like objects are equal.
|
||
|
|
|
||
|
|
:param other: The other object to check against.
|
||
|
|
|
||
|
|
The value of :attr:`prereleases` is ignored.
|
||
|
|
|
||
|
|
>>> SpecifierSet(">=1.0.0,!=1.0.1") == SpecifierSet(">=1.0.0,!=1.0.1")
|
||
|
|
True
|
||
|
|
>>> (SpecifierSet(">=1.0.0,!=1.0.1", prereleases=False) ==
|
||
|
|
... SpecifierSet(">=1.0.0,!=1.0.1", prereleases=True))
|
||
|
|
True
|
||
|
|
>>> SpecifierSet(">=1.0.0,!=1.0.1") == ">=1.0.0,!=1.0.1"
|
||
|
|
True
|
||
|
|
>>> SpecifierSet(">=1.0.0,!=1.0.1") == SpecifierSet(">=1.0.0")
|
||
|
|
False
|
||
|
|
>>> SpecifierSet(">=1.0.0,!=1.0.1") == SpecifierSet(">=1.0.0,!=1.0.2")
|
||
|
|
False
|
||
|
|
"""
|
||
|
|
if isinstance(other, (str, Specifier)):
|
||
|
|
other = SpecifierSet(str(other))
|
||
|
|
elif not isinstance(other, SpecifierSet):
|
||
|
|
return NotImplemented
|
||
|
|
|
||
|
|
return self._specs == other._specs
|
||
|
|
|
||
|
|
def __len__(self) -> int:
|
||
|
|
"""Returns the number of specifiers in this specifier set."""
|
||
|
|
return len(self._specs)
|
||
|
|
|
||
|
|
def __iter__(self) -> Iterator[Specifier]:
|
||
|
|
"""
|
||
|
|
Returns an iterator over all the underlying :class:`Specifier` instances
|
||
|
|
in this specifier set.
|
||
|
|
|
||
|
|
>>> sorted(SpecifierSet(">=1.0.0,!=1.0.1"), key=str)
|
||
|
|
[<Specifier('!=1.0.1')>, <Specifier('>=1.0.0')>]
|
||
|
|
"""
|
||
|
|
return iter(self._specs)
|
||
|
|
|
||
|
|
def __contains__(self, item: UnparsedVersion) -> bool:
|
||
|
|
"""Return whether or not the item is contained in this specifier.
|
||
|
|
|
||
|
|
:param item: The item to check for.
|
||
|
|
|
||
|
|
This is used for the ``in`` operator and behaves the same as
|
||
|
|
:meth:`contains` with no ``prereleases`` argument passed.
|
||
|
|
|
||
|
|
>>> "1.2.3" in SpecifierSet(">=1.0.0,!=1.0.1")
|
||
|
|
True
|
||
|
|
>>> Version("1.2.3") in SpecifierSet(">=1.0.0,!=1.0.1")
|
||
|
|
True
|
||
|
|
>>> "1.0.1" in SpecifierSet(">=1.0.0,!=1.0.1")
|
||
|
|
False
|
||
|
|
>>> "1.3.0a1" in SpecifierSet(">=1.0.0,!=1.0.1")
|
||
|
|
False
|
||
|
|
>>> "1.3.0a1" in SpecifierSet(">=1.0.0,!=1.0.1", prereleases=True)
|
||
|
|
True
|
||
|
|
"""
|
||
|
|
return self.contains(item)
|
||
|
|
|
||
|
|
def contains(
|
||
|
|
self,
|
||
|
|
item: UnparsedVersion,
|
||
|
|
prereleases: Optional[bool] = None,
|
||
|
|
installed: Optional[bool] = None,
|
||
|
|
) -> bool:
|
||
|
|
"""Return whether or not the item is contained in this SpecifierSet.
|
||
|
|
|
||
|
|
:param item:
|
||
|
|
The item to check for, which can be a version string or a
|
||
|
|
:class:`Version` instance.
|
||
|
|
:param prereleases:
|
||
|
|
Whether or not to match prereleases with this SpecifierSet. If set to
|
||
|
|
``None`` (the default), it uses :attr:`prereleases` to determine
|
||
|
|
whether or not prereleases are allowed.
|
||
|
|
|
||
|
|
>>> SpecifierSet(">=1.0.0,!=1.0.1").contains("1.2.3")
|
||
|
|
True
|
||
|
|
>>> SpecifierSet(">=1.0.0,!=1.0.1").contains(Version("1.2.3"))
|
||
|
|
True
|
||
|
|
>>> SpecifierSet(">=1.0.0,!=1.0.1").contains("1.0.1")
|
||
|
|
False
|
||
|
|
>>> SpecifierSet(">=1.0.0,!=1.0.1").contains("1.3.0a1")
|
||
|
|
False
|
||
|
|
>>> SpecifierSet(">=1.0.0,!=1.0.1", prereleases=True).contains("1.3.0a1")
|
||
|
|
True
|
||
|
|
>>> SpecifierSet(">=1.0.0,!=1.0.1").contains("1.3.0a1", prereleases=True)
|
||
|
|
True
|
||
|
|
"""
|
||
|
|
# Ensure that our item is a Version instance.
|
||
|
|
if not isinstance(item, Version):
|
||
|
|
item = Version(item)
|
||
|
|
|
||
|
|
# Determine if we're forcing a prerelease or not, if we're not forcing
|
||
|
|
# one for this particular filter call, then we'll use whatever the
|
||
|
|
# SpecifierSet thinks for whether or not we should support prereleases.
|
||
|
|
if prereleases is None:
|
||
|
|
prereleases = self.prereleases
|
||
|
|
|
||
|
|
# We can determine if we're going to allow pre-releases by looking to
|
||
|
|
# see if any of the underlying items supports them. If none of them do
|
||
|
|
# and this item is a pre-release then we do not allow it and we can
|
||
|
|
# short circuit that here.
|
||
|
|
# Note: This means that 1.0.dev1 would not be contained in something
|
||
|
|
# like >=1.0.devabc however it would be in >=1.0.debabc,>0.0.dev0
|
||
|
|
if not prereleases and item.is_prerelease:
|
||
|
|
return False
|
||
|
|
|
||
|
|
if installed and item.is_prerelease:
|
||
|
|
item = Version(item.base_version)
|
||
|
|
|
||
|
|
# We simply dispatch to the underlying specs here to make sure that the
|
||
|
|
# given version is contained within all of them.
|
||
|
|
# Note: This use of all() here means that an empty set of specifiers
|
||
|
|
# will always return True, this is an explicit design decision.
|
||
|
|
return all(s.contains(item, prereleases=prereleases) for s in self._specs)
|
||
|
|
|
||
|
|
def filter(
|
||
|
|
self, iterable: Iterable[UnparsedVersionVar], prereleases: Optional[bool] = None
|
||
|
|
) -> Iterator[UnparsedVersionVar]:
|
||
|
|
"""Filter items in the given iterable, that match the specifiers in this set.
|
||
|
|
|
||
|
|
:param iterable:
|
||
|
|
An iterable that can contain version strings and :class:`Version` instances.
|
||
|
|
The items in the iterable will be filtered according to the specifier.
|
||
|
|
:param prereleases:
|
||
|
|
Whether or not to allow prereleases in the returned iterator. If set to
|
||
|
|
``None`` (the default), it will be intelligently decide whether to allow
|
||
|
|
prereleases or not (based on the :attr:`prereleases` attribute, and
|
||
|
|
whether the only versions matching are prereleases).
|
||
|
|
|
||
|
|
This method is smarter than just ``filter(SpecifierSet(...).contains, [...])``
|
||
|
|
because it implements the rule from :pep:`440` that a prerelease item
|
||
|
|
SHOULD be accepted if no other versions match the given specifier.
|
||
|
|
|
||
|
|
>>> list(SpecifierSet(">=1.2.3").filter(["1.2", "1.3", "1.5a1"]))
|
||
|
|
['1.3']
|
||
|
|
>>> list(SpecifierSet(">=1.2.3").filter(["1.2", "1.3", Version("1.4")]))
|
||
|
|
['1.3', <Version('1.4')>]
|
||
|
|
>>> list(SpecifierSet(">=1.2.3").filter(["1.2", "1.5a1"]))
|
||
|
|
[]
|
||
|
|
>>> list(SpecifierSet(">=1.2.3").filter(["1.3", "1.5a1"], prereleases=True))
|
||
|
|
['1.3', '1.5a1']
|
||
|
|
>>> list(SpecifierSet(">=1.2.3", prereleases=True).filter(["1.3", "1.5a1"]))
|
||
|
|
['1.3', '1.5a1']
|
||
|
|
|
||
|
|
An "empty" SpecifierSet will filter items based on the presence of prerelease
|
||
|
|
versions in the set.
|
||
|
|
|
||
|
|
>>> list(SpecifierSet("").filter(["1.3", "1.5a1"]))
|
||
|
|
['1.3']
|
||
|
|
>>> list(SpecifierSet("").filter(["1.5a1"]))
|
||
|
|
['1.5a1']
|
||
|
|
>>> list(SpecifierSet("", prereleases=True).filter(["1.3", "1.5a1"]))
|
||
|
|
['1.3', '1.5a1']
|
||
|
|
>>> list(SpecifierSet("").filter(["1.3", "1.5a1"], prereleases=True))
|
||
|
|
['1.3', '1.5a1']
|
||
|
|
"""
|
||
|
|
# Determine if we're forcing a prerelease or not, if we're not forcing
|
||
|
|
# one for this particular filter call, then we'll use whatever the
|
||
|
|
# SpecifierSet thinks for whether or not we should support prereleases.
|
||
|
|
if prereleases is None:
|
||
|
|
prereleases = self.prereleases
|
||
|
|
|
||
|
|
# If we have any specifiers, then we want to wrap our iterable in the
|
||
|
|
# filter method for each one, this will act as a logical AND amongst
|
||
|
|
# each specifier.
|
||
|
|
if self._specs:
|
||
|
|
for spec in self._specs:
|
||
|
|
iterable = spec.filter(iterable, prereleases=bool(prereleases))
|
||
|
|
return iter(iterable)
|
||
|
|
# If we do not have any specifiers, then we need to have a rough filter
|
||
|
|
# which will filter out any pre-releases, unless there are no final
|
||
|
|
# releases.
|
||
|
|
else:
|
||
|
|
filtered: List[UnparsedVersionVar] = []
|
||
|
|
found_prereleases: List[UnparsedVersionVar] = []
|
||
|
|
|
||
|
|
for item in iterable:
|
||
|
|
parsed_version = _coerce_version(item)
|
||
|
|
|
||
|
|
# Store any item which is a pre-release for later unless we've
|
||
|
|
# already found a final version or we are accepting prereleases
|
||
|
|
if parsed_version.is_prerelease and not prereleases:
|
||
|
|
if not filtered:
|
||
|
|
found_prereleases.append(item)
|
||
|
|
else:
|
||
|
|
filtered.append(item)
|
||
|
|
|
||
|
|
# If we've found no items except for pre-releases, then we'll go
|
||
|
|
# ahead and use the pre-releases
|
||
|
|
if not filtered and found_prereleases and prereleases is None:
|
||
|
|
return iter(found_prereleases)
|
||
|
|
|
||
|
|
return iter(filtered)
|