803 lines
29 KiB
Python
803 lines
29 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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import abc
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import functools
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import itertools
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import re
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import warnings
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from typing import (
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Callable,
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Dict,
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Iterable,
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Iterator,
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List,
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Optional,
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Pattern,
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Set,
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Tuple,
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TypeVar,
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Union,
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)
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from .utils import canonicalize_version
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from .version import LegacyVersion, Version, parse
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ParsedVersion = Union[Version, LegacyVersion]
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UnparsedVersion = Union[Version, LegacyVersion, str]
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VersionTypeVar = TypeVar("VersionTypeVar", bound=UnparsedVersion)
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CallableOperator = Callable[[ParsedVersion, str], bool]
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class InvalidSpecifier(ValueError):
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"""
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An invalid specifier was found, users should refer to PEP 440.
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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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"""
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@abc.abstractproperty
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def prereleases(self) -> Optional[bool]:
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"""
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Returns whether or not pre-releases as a whole are allowed by this
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specifier.
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"""
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@prereleases.setter
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def prereleases(self, value: bool) -> None:
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"""
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Sets whether or not pre-releases as a whole are allowed by this
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specifier.
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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[VersionTypeVar], prereleases: Optional[bool] = None
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) -> Iterable[VersionTypeVar]:
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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 _IndividualSpecifier(BaseSpecifier):
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_operators: Dict[str, str] = {}
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_regex: Pattern[str]
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def __init__(self, spec: str = "", prereleases: Optional[bool] = None) -> None:
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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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def __repr__(self) -> str:
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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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return "{}{}".format(*self._spec)
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@property
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def _canonical_spec(self) -> Tuple[str, str]:
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return self._spec[0], canonicalize_version(self._spec[1])
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def __hash__(self) -> int:
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return hash(self._canonical_spec)
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def __eq__(self, other: object) -> bool:
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if isinstance(other, str):
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try:
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other = self.__class__(str(other))
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except InvalidSpecifier:
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return NotImplemented
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elif not isinstance(other, self.__class__):
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return NotImplemented
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return self._canonical_spec == other._canonical_spec
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def _get_operator(self, op: str) -> CallableOperator:
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operator_callable: CallableOperator = getattr(
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self, f"_compare_{self._operators[op]}"
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)
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return operator_callable
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def _coerce_version(self, version: UnparsedVersion) -> ParsedVersion:
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if not isinstance(version, (LegacyVersion, Version)):
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version = parse(version)
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return version
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@property
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def operator(self) -> str:
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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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return self._spec[1]
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@property
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def prereleases(self) -> Optional[bool]:
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return self._prereleases
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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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def __contains__(self, item: str) -> bool:
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return self.contains(item)
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def contains(
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self, item: UnparsedVersion, prereleases: Optional[bool] = None
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) -> bool:
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# Determine if prereleases are to be allowed or not.
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if prereleases is None:
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prereleases = self.prereleases
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# Normalize item to a Version or LegacyVersion, this allows us to have
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# a shortcut for ``"2.0" in Specifier(">=2")
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normalized_item = self._coerce_version(item)
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# Determine if we should be supporting prereleases in this specifier
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# or not, if we do not support prereleases than we can short circuit
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# logic if this version is a prereleases.
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if normalized_item.is_prerelease and not prereleases:
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return False
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# Actually do the comparison to determine if this item is contained
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# within this Specifier or not.
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operator_callable: CallableOperator = self._get_operator(self.operator)
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return operator_callable(normalized_item, self.version)
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def filter(
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self, iterable: Iterable[VersionTypeVar], prereleases: Optional[bool] = None
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) -> Iterable[VersionTypeVar]:
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yielded = False
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found_prereleases = []
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kw = {"prereleases": prereleases if prereleases is not None else True}
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# Attempt to iterate over all the values in the iterable and if any of
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# them match, yield them.
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for version in iterable:
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parsed_version = self._coerce_version(version)
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if self.contains(parsed_version, **kw):
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# If our version is a prerelease, and we were not set to allow
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# prereleases, then we'll store it for later in case nothing
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# else matches this specifier.
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if parsed_version.is_prerelease and not (
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prereleases or self.prereleases
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):
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found_prereleases.append(version)
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# Either this is not a prerelease, or we should have been
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# accepting prereleases from the beginning.
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else:
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yielded = True
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yield version
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# Now that we've iterated over everything, determine if we've yielded
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# any values, and if we have not and we have any prereleases stored up
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# then we will go ahead and yield the prereleases.
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if not yielded and found_prereleases:
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for version in found_prereleases:
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yield version
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class LegacySpecifier(_IndividualSpecifier):
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_regex_str = r"""
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(?P<operator>(==|!=|<=|>=|<|>))
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\s*
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(?P<version>
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[^,;\s)]* # Since this is a "legacy" specifier, and the version
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# string can be just about anything, we match everything
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# except for whitespace, a semi-colon for marker support,
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# a closing paren since versions can be enclosed in
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# them, and a comma since it's a version separator.
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)
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"""
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_regex = re.compile(r"^\s*" + _regex_str + r"\s*$", re.VERBOSE | re.IGNORECASE)
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_operators = {
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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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}
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def __init__(self, spec: str = "", prereleases: Optional[bool] = None) -> None:
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super().__init__(spec, prereleases)
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warnings.warn(
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"Creating a LegacyVersion has been deprecated and will be "
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"removed in the next major release",
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DeprecationWarning,
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)
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def _coerce_version(self, version: UnparsedVersion) -> LegacyVersion:
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if not isinstance(version, LegacyVersion):
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version = LegacyVersion(str(version))
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return version
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def _compare_equal(self, prospective: LegacyVersion, spec: str) -> bool:
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return prospective == self._coerce_version(spec)
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def _compare_not_equal(self, prospective: LegacyVersion, spec: str) -> bool:
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return prospective != self._coerce_version(spec)
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def _compare_less_than_equal(self, prospective: LegacyVersion, spec: str) -> bool:
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return prospective <= self._coerce_version(spec)
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def _compare_greater_than_equal(
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self, prospective: LegacyVersion, spec: str
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) -> bool:
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return prospective >= self._coerce_version(spec)
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def _compare_less_than(self, prospective: LegacyVersion, spec: str) -> bool:
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return prospective < self._coerce_version(spec)
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def _compare_greater_than(self, prospective: LegacyVersion, spec: str) -> bool:
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return prospective > self._coerce_version(spec)
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def _require_version_compare(
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fn: Callable[["Specifier", ParsedVersion, str], bool]
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) -> Callable[["Specifier", ParsedVersion, str], bool]:
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@functools.wraps(fn)
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def wrapped(self: "Specifier", prospective: ParsedVersion, spec: str) -> bool:
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if not isinstance(prospective, Version):
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return False
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return fn(self, prospective, spec)
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return wrapped
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class Specifier(_IndividualSpecifier):
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_regex_str = r"""
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(?P<operator>(~=|==|!=|<=|>=|<|>|===))
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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]* # We just match everything, except for whitespace
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# since we are only testing for strict identity.
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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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(?: # pre release
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[-_\.]?
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(a|b|c|rc|alpha|beta|pre|preview)
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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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# You cannot use a wild card and a dev or local version
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# together so group them with a | and make them optional.
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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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\.\* # Wild card syntax of .*
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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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(a|b|c|rc|alpha|beta|pre|preview)
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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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(a|b|c|rc|alpha|beta|pre|preview)
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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(r"^\s*" + _regex_str + r"\s*$", re.VERBOSE | re.IGNORECASE)
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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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@_require_version_compare
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def _compare_compatible(self, prospective: ParsedVersion, spec: str) -> bool:
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# Compatible releases have an equivalent combination of >= and ==. That
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# is that ~=2.2 is equivalent to >=2.2,==2.*. This allows us to
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# implement this in terms of the other specifiers instead of
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# implementing it ourselves. The only thing we need to do is construct
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# the other specifiers.
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# We want everything but the last item in the version, but we want to
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# ignore suffix segments.
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prefix = ".".join(
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list(itertools.takewhile(_is_not_suffix, _version_split(spec)))[:-1]
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)
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# Add the prefix notation to the end of our string
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prefix += ".*"
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return self._get_operator(">=")(prospective, spec) and self._get_operator("==")(
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prospective, prefix
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)
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@_require_version_compare
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def _compare_equal(self, prospective: ParsedVersion, spec: str) -> bool:
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# We need special logic to handle prefix matching
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if spec.endswith(".*"):
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# In the case of prefix matching we want to ignore local segment.
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prospective = Version(prospective.public)
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# Split the spec out by dots, and pretend that there is an implicit
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# dot in between a release segment and a pre-release segment.
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split_spec = _version_split(spec[:-2]) # Remove the trailing .*
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# Split the prospective version out by dots, and pretend that there
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# is an implicit dot in between a release segment and a pre-release
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# segment.
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split_prospective = _version_split(str(prospective))
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# Shorten the prospective version to be the same length as the spec
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# so that we can determine if the specifier is a prefix of the
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# prospective version or not.
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shortened_prospective = split_prospective[: len(split_spec)]
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# Pad out our two sides with zeros so that they both equal the same
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# length.
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padded_spec, padded_prospective = _pad_version(
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split_spec, shortened_prospective
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)
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return padded_prospective == padded_spec
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else:
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# Convert our spec string into a Version
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spec_version = Version(spec)
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# If the specifier does not have a local segment, then we want to
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# act as if the prospective version also does not have a local
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# segment.
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if not spec_version.local:
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prospective = Version(prospective.public)
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return prospective == spec_version
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@_require_version_compare
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def _compare_not_equal(self, prospective: ParsedVersion, spec: str) -> bool:
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return not self._compare_equal(prospective, spec)
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@_require_version_compare
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def _compare_less_than_equal(self, prospective: ParsedVersion, spec: str) -> bool:
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# NB: Local version identifiers are NOT permitted in the version
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# specifier, so local version labels can be universally removed from
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# the prospective version.
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return Version(prospective.public) <= Version(spec)
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@_require_version_compare
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def _compare_greater_than_equal(
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self, prospective: ParsedVersion, spec: str
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) -> bool:
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# NB: Local version identifiers are NOT permitted in the version
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# specifier, so local version labels can be universally removed from
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# the prospective version.
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return Version(prospective.public) >= Version(spec)
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@_require_version_compare
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def _compare_less_than(self, prospective: ParsedVersion, spec_str: str) -> bool:
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# Convert our spec to a Version instance, since we'll want to work with
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# it as a version.
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spec = Version(spec_str)
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# Check to see if the prospective version is less than the spec
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# version. If it's not we can short circuit and just return False now
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# instead of doing extra unneeded work.
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if not prospective < spec:
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return False
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# This special case is here so that, unless the specifier itself
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# includes is a pre-release version, that we do not accept pre-release
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# versions for the version mentioned in the specifier (e.g. <3.1 should
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# not match 3.1.dev0, but should match 3.0.dev0).
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if not spec.is_prerelease and prospective.is_prerelease:
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if Version(prospective.base_version) == Version(spec.base_version):
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return False
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# If we've gotten to here, it means that prospective version is both
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# less than the spec version *and* it's not a pre-release of the same
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# version in the spec.
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return True
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@_require_version_compare
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def _compare_greater_than(self, prospective: ParsedVersion, spec_str: str) -> bool:
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# Convert our spec to a Version instance, since we'll want to work with
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# it as a version.
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spec = Version(spec_str)
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# Check to see if the prospective version is greater than the spec
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# version. If it's not we can short circuit and just return False now
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# instead of doing extra unneeded work.
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if not prospective > spec:
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return False
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# This special case is here so that, unless the specifier itself
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# includes is a post-release version, that we do not accept
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# post-release versions for the version mentioned in the specifier
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|
# (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()
|
|
|
|
@property
|
|
def prereleases(self) -> bool:
|
|
|
|
# If there is an explicit prereleases set for this, then we'll just
|
|
# blindly use that.
|
|
if self._prereleases is not None:
|
|
return self._prereleases
|
|
|
|
# Look at all of our specifiers and determine if they are inclusive
|
|
# operators, and if they are if they are including an explicit
|
|
# prerelease.
|
|
operator, version = self._spec
|
|
if operator in ["==", ">=", "<=", "~=", "==="]:
|
|
# The == specifier can include a trailing .*, if it does we
|
|
# want to remove before parsing.
|
|
if operator == "==" and version.endswith(".*"):
|
|
version = version[:-2]
|
|
|
|
# Parse the version, and if it is a pre-release than this
|
|
# specifier allows pre-releases.
|
|
if parse(version).is_prerelease:
|
|
return True
|
|
|
|
return False
|
|
|
|
@prereleases.setter
|
|
def prereleases(self, value: bool) -> None:
|
|
self._prereleases = value
|
|
|
|
|
|
_prefix_regex = re.compile(r"^([0-9]+)((?:a|b|c|rc)[0-9]+)$")
|
|
|
|
|
|
def _version_split(version: str) -> List[str]:
|
|
result: List[str] = []
|
|
for item in version.split("."):
|
|
match = _prefix_regex.search(item)
|
|
if match:
|
|
result.extend(match.groups())
|
|
else:
|
|
result.append(item)
|
|
return result
|
|
|
|
|
|
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(*left_split)), list(itertools.chain(*right_split)))
|
|
|
|
|
|
class SpecifierSet(BaseSpecifier):
|
|
def __init__(
|
|
self, specifiers: str = "", prereleases: Optional[bool] = None
|
|
) -> None:
|
|
|
|
# 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()]
|
|
|
|
# Parsed each individual specifier, attempting first to make it a
|
|
# Specifier and falling back to a LegacySpecifier.
|
|
parsed: Set[_IndividualSpecifier] = set()
|
|
for specifier in split_specifiers:
|
|
try:
|
|
parsed.add(Specifier(specifier))
|
|
except InvalidSpecifier:
|
|
parsed.add(LegacySpecifier(specifier))
|
|
|
|
# Turn our parsed specifiers into a frozen set and save them for later.
|
|
self._specs = frozenset(parsed)
|
|
|
|
# Store our prereleases value so we can use it later to determine if
|
|
# we accept prereleases or not.
|
|
self._prereleases = prereleases
|
|
|
|
def __repr__(self) -> str:
|
|
pre = (
|
|
f", prereleases={self.prereleases!r}"
|
|
if self._prereleases is not None
|
|
else ""
|
|
)
|
|
|
|
return f"<SpecifierSet({str(self)!r}{pre})>"
|
|
|
|
def __str__(self) -> str:
|
|
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":
|
|
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:
|
|
if isinstance(other, (str, _IndividualSpecifier)):
|
|
other = SpecifierSet(str(other))
|
|
elif not isinstance(other, SpecifierSet):
|
|
return NotImplemented
|
|
|
|
return self._specs == other._specs
|
|
|
|
def __len__(self) -> int:
|
|
return len(self._specs)
|
|
|
|
def __iter__(self) -> Iterator[_IndividualSpecifier]:
|
|
return iter(self._specs)
|
|
|
|
@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 __contains__(self, item: UnparsedVersion) -> bool:
|
|
return self.contains(item)
|
|
|
|
def contains(
|
|
self, item: UnparsedVersion, prereleases: Optional[bool] = None
|
|
) -> bool:
|
|
|
|
# Ensure that our item is a Version or LegacyVersion instance.
|
|
if not isinstance(item, (LegacyVersion, Version)):
|
|
item = parse(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
|
|
|
|
# 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[VersionTypeVar], prereleases: Optional[bool] = None
|
|
) -> Iterable[VersionTypeVar]:
|
|
|
|
# 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 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, and which will filter out LegacyVersion in general.
|
|
else:
|
|
filtered: List[VersionTypeVar] = []
|
|
found_prereleases: List[VersionTypeVar] = []
|
|
|
|
item: UnparsedVersion
|
|
parsed_version: Union[Version, LegacyVersion]
|
|
|
|
for item in iterable:
|
|
# Ensure that we some kind of Version class for this item.
|
|
if not isinstance(item, (LegacyVersion, Version)):
|
|
parsed_version = parse(item)
|
|
else:
|
|
parsed_version = item
|
|
|
|
# Filter out any item which is parsed as a LegacyVersion
|
|
if isinstance(parsed_version, LegacyVersion):
|
|
continue
|
|
|
|
# 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 found_prereleases
|
|
|
|
return filtered
|