springsuite: planemo/lib/python3.7/site-packages/packaging/specifiers.py comparison

comparison planemo/lib/python3.7/site-packages/packaging/specifiers.py @ 1:56ad4e20f292 draft

"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"

author	guerler
date	Fri, 31 Jul 2020 00:32:28 -0400
parents
children

comparison

equal deleted inserted replaced

-:d30785e31577
+:56ad4e20f292
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+import abc
+import functools
+import itertools
+import re
+from ._compat import string_types, with_metaclass
+from ._typing import TYPE_CHECKING
+from .utils import canonicalize_version
+from .version import Version, LegacyVersion, parse
+if TYPE_CHECKING:  # pragma: no cover
+from typing import (
+List,
+Dict,
+Union,
+Iterable,
+Iterator,
+Optional,
+Callable,
+Tuple,
+FrozenSet,
+)
+ParsedVersion = Union[Version, LegacyVersion]
+UnparsedVersion = Union[Version, LegacyVersion, str]
+CallableOperator = Callable[[ParsedVersion, str], bool]
+class InvalidSpecifier(ValueError):
+"""
+An invalid specifier was found, users should refer to PEP 440.
+"""
+class BaseSpecifier(with_metaclass(abc.ABCMeta, object)):  # type: ignore
+@abc.abstractmethod
+def __str__(self):
+# type: () -> str
+"""
+Returns the str representation of this Specifier like object. This
+should be representative of the Specifier itself.
+"""
+@abc.abstractmethod
+def __hash__(self):
+# type: () -> int
+"""
+Returns a hash value for this Specifier like object.
+"""
+@abc.abstractmethod
+def __eq__(self, other):
+# type: (object) -> bool
+"""
+Returns a boolean representing whether or not the two Specifier like
+objects are equal.
+"""
+@abc.abstractmethod
+def __ne__(self, other):
+# type: (object) -> bool
+"""
+Returns a boolean representing whether or not the two Specifier like
+objects are not equal.
+"""
+@abc.abstractproperty
+def prereleases(self):
+# type: () -> Optional[bool]
+"""
+Returns whether or not pre-releases as a whole are allowed by this
+specifier.
+"""
+@prereleases.setter
+def prereleases(self, value):
+# type: (bool) -> None
+"""
+Sets whether or not pre-releases as a whole are allowed by this
+specifier.
+"""
+@abc.abstractmethod
+def contains(self, item, prereleases=None):
+# type: (str, Optional[bool]) -> bool
+"""
+Determines if the given item is contained within this specifier.
+"""
+@abc.abstractmethod
+def filter(self, iterable, prereleases=None):
+# type: (Iterable[UnparsedVersion], Optional[bool]) -> Iterable[UnparsedVersion]
+"""
+Takes an iterable of items and filters them so that only items which
+are contained within this specifier are allowed in it.
+"""
+class _IndividualSpecifier(BaseSpecifier):
+_operators = {}  # type: Dict[str, str]
+def __init__(self, spec="", prereleases=None):
+# type: (str, Optional[bool]) -> None
+match = self._regex.search(spec)
+if not match:
+raise InvalidSpecifier("Invalid specifier: '{0}'".format(spec))
+self._spec = (
+match.group("operator").strip(),
+match.group("version").strip(),
+)  # type: Tuple[str, str]
+# Store whether or not this Specifier should accept prereleases
+self._prereleases = prereleases
+def __repr__(self):
+# type: () -> str
+pre = (
+", prereleases={0!r}".format(self.prereleases)
+if self._prereleases is not None
+else ""
+)
+return "<{0}({1!r}{2})>".format(self.__class__.__name__, str(self), pre)
+def __str__(self):
+# type: () -> str
+return "{0}{1}".format(*self._spec)
+@property
+def _canonical_spec(self):
+# type: () -> Tuple[str, Union[Version, str]]
+return self._spec[0], canonicalize_version(self._spec[1])
+def __hash__(self):
+# type: () -> int
+return hash(self._canonical_spec)
+def __eq__(self, other):
+# type: (object) -> bool
+if isinstance(other, string_types):
+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 __ne__(self, other):
+# type: (object) -> bool
+if isinstance(other, string_types):
+try:
+other = self.__class__(str(other))
+except InvalidSpecifier:
+return NotImplemented
+elif not isinstance(other, self.__class__):
+return NotImplemented
+return self._spec != other._spec
+def _get_operator(self, op):
+# type: (str) -> CallableOperator
+operator_callable = getattr(
+self, "_compare_{0}".format(self._operators[op])
+)  # type: CallableOperator
+return operator_callable
+def _coerce_version(self, version):
+# type: (UnparsedVersion) -> ParsedVersion
+if not isinstance(version, (LegacyVersion, Version)):
+version = parse(version)
+return version
+@property
+def operator(self):
+# type: () -> str
+return self._spec[0]
+@property
+def version(self):
+# type: () -> str
+return self._spec[1]
+@property
+def prereleases(self):
+# type: () -> Optional[bool]
+return self._prereleases
+@prereleases.setter
+def prereleases(self, value):
+# type: (bool) -> None
+self._prereleases = value
+def __contains__(self, item):
+# type: (str) -> bool
+return self.contains(item)
+def contains(self, item, prereleases=None):
+# type: (UnparsedVersion, Optional[bool]) -> bool
+# Determine if prereleases are to be allowed or not.
+if prereleases is None:
+prereleases = self.prereleases
+# Normalize item to a Version or LegacyVersion, this allows us to have
+# a shortcut for ``"2.0" in Specifier(">=2")
+normalized_item = self._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 = self._get_operator(self.operator)  # type: CallableOperator
+return operator_callable(normalized_item, self.version)
+def filter(self, iterable, prereleases=None):
+# type: (Iterable[UnparsedVersion], Optional[bool]) -> Iterable[UnparsedVersion]
+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 = self._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 incase 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
+class LegacySpecifier(_IndividualSpecifier):
+_regex_str = r"""
+(?P<operator>(==|!=|<=|>=|<|>))
+\s*
+(?P<version>
+[^,;\s)]* # Since this is a "legacy" specifier, and the version
+# string can be just about anything, we match everything
+# except for whitespace, a semi-colon for marker support,
+# a closing paren since versions can be enclosed in
+# them, and a comma since it's a version separator.
+)
+"""
+_regex = re.compile(r"^\s*" + _regex_str + r"\s*$", re.VERBOSE | re.IGNORECASE)
+_operators = {
+"==": "equal",
+"!=": "not_equal",
+"<=": "less_than_equal",
+">=": "greater_than_equal",
+"<": "less_than",
+">": "greater_than",
+}
+def _coerce_version(self, version):
+# type: (Union[ParsedVersion, str]) -> LegacyVersion
+if not isinstance(version, LegacyVersion):
+version = LegacyVersion(str(version))
+return version
+def _compare_equal(self, prospective, spec):
+# type: (LegacyVersion, str) -> bool
+return prospective == self._coerce_version(spec)
+def _compare_not_equal(self, prospective, spec):
+# type: (LegacyVersion, str) -> bool
+return prospective != self._coerce_version(spec)
+def _compare_less_than_equal(self, prospective, spec):
+# type: (LegacyVersion, str) -> bool
+return prospective <= self._coerce_version(spec)
+def _compare_greater_than_equal(self, prospective, spec):
+# type: (LegacyVersion, str) -> bool
+return prospective >= self._coerce_version(spec)
+def _compare_less_than(self, prospective, spec):
+# type: (LegacyVersion, str) -> bool
+return prospective < self._coerce_version(spec)
+def _compare_greater_than(self, prospective, spec):
+# type: (LegacyVersion, str) -> bool
+return prospective > self._coerce_version(spec)
+def _require_version_compare(
+fn  # type: (Callable[[Specifier, ParsedVersion, str], bool])
+):
+# type: (...) -> Callable[[Specifier, ParsedVersion, str], bool]
+@functools.wraps(fn)
+def wrapped(self, prospective, spec):
+# type: (Specifier, ParsedVersion, str) -> bool
+if not isinstance(prospective, Version):
+return False
+return fn(self, prospective, spec)
+return wrapped
+class Specifier(_IndividualSpecifier):
+_regex_str = r"""
+(?P<operator>(~=|==|!=|<=|>=|<|>|===))
+(?P<version>
+(?:
+# The identity operators allow for an escape hatch that will
+# do an exact string match of the version you wish to install.
+# This will not be parsed by PEP 440 and we cannot determine
+# any semantic meaning from it. This operator is discouraged
+# but included entirely as an escape hatch.
+(?<====)  # Only match for the identity operator
+\s*
+[^\s]*    # We just match everything, except for whitespace
+# since we are only testing for strict identity.
+)
+|
+(?:
+# The (non)equality operators allow for wild card and local
+# versions to be specified so we have to define these two
+# operators separately to enable that.
+(?<===|!=)            # Only match for equals and not equals
+\s*
+v?
+(?:[0-9]+!)?          # epoch
+[0-9]+(?:\.[0-9]+)*   # release
+(?:                   # pre release
+[-_\.]?
+(a|b|c|rc|alpha|beta|pre|preview)
+[-_\.]?
+[0-9]*
+)?
+(?:                   # post release
+(?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+)?
+# You cannot use a wild card and a dev or local version
+# together so group them with a | and make them optional.
+(?:
+(?:[-_\.]?dev[-_\.]?[0-9]*)?         # dev release
+(?:\+[a-z0-9]+(?:[-_\.][a-z0-9]+)*)? # local
+|
+\.\*  # Wild card syntax of .*
+)?
+)
+|
+(?:
+# The compatible operator requires at least two digits in the
+# release segment.
+(?<=~=)               # Only match for the compatible operator
+\s*
+v?
+(?:[0-9]+!)?          # epoch
+[0-9]+(?:\.[0-9]+)+   # release  (We have a + instead of a *)
+(?:                   # pre release
+[-_\.]?
+(a|b|c|rc|alpha|beta|pre|preview)
+[-_\.]?
+[0-9]*
+)?
+(?:                                   # post release
+(?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+)?
+(?:[-_\.]?dev[-_\.]?[0-9]*)?          # dev release
+)
+|
+(?:
+# All other operators only allow a sub set of what the
+# (non)equality operators do. Specifically they do not allow
+# local versions to be specified nor do they allow the prefix
+# matching wild cards.
+(?<!==|!=|~=)         # We have special cases for these
+# operators so we want to make sure they
+# don't match here.
+\s*
+v?
+(?:[0-9]+!)?          # epoch
+[0-9]+(?:\.[0-9]+)*   # release
+(?:                   # pre release
+[-_\.]?
+(a|b|c|rc|alpha|beta|pre|preview)
+[-_\.]?
+[0-9]*
+)?
+(?:                                   # post release
+(?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+)?
+(?:[-_\.]?dev[-_\.]?[0-9]*)?          # dev release
+)
+)
+"""
+_regex = re.compile(r"^\s*" + _regex_str + r"\s*$", re.VERBOSE | re.IGNORECASE)
+_operators = {
+"~=": "compatible",
+"==": "equal",
+"!=": "not_equal",
+"<=": "less_than_equal",
+">=": "greater_than_equal",
+"<": "less_than",
+">": "greater_than",
+"===": "arbitrary",
+}
+@_require_version_compare
+def _compare_compatible(self, prospective, spec):
+# type: (ParsedVersion, 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 post and dev releases and we want to treat the pre-release as
+# it's own separate segment.
+prefix = ".".join(
+list(
+itertools.takewhile(
+lambda x: (not x.startswith("post") and not x.startswith("dev")),
+_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
+)
+@_require_version_compare
+def _compare_equal(self, prospective, spec):
+# type: (ParsedVersion, 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.
+prospective = Version(prospective.public)
+# Split the spec out by dots, and pretend that there is an implicit
+# dot in between a release segment and a pre-release segment.
+split_spec = _version_split(spec[:-2])  # Remove the trailing .*
+# Split the prospective version out by dots, and pretend that there
+# is an implicit dot in between a release segment and a pre-release
+# segment.
+split_prospective = _version_split(str(prospective))
+# 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 = split_prospective[: len(split_spec)]
+# Pad out our two sides with zeros so that they both equal the same
+# length.
+padded_spec, padded_prospective = _pad_version(
+split_spec, shortened_prospective
+)
+return padded_prospective == padded_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
+@_require_version_compare
+def _compare_not_equal(self, prospective, spec):
+# type: (ParsedVersion, str) -> bool
+return not self._compare_equal(prospective, spec)
+@_require_version_compare
+def _compare_less_than_equal(self, prospective, spec):
+# type: (ParsedVersion, 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)
+@_require_version_compare
+def _compare_greater_than_equal(self, prospective, spec):
+# type: (ParsedVersion, 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)
+@_require_version_compare
+def _compare_less_than(self, prospective, spec_str):
+# type: (ParsedVersion, 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
+@_require_version_compare
+def _compare_greater_than(self, prospective, spec_str):
+# type: (ParsedVersion, 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, spec):
+# type: (Version, str) -> bool
+return str(prospective).lower() == str(spec).lower()
+@property
+def prereleases(self):
+# type: () -> 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):
+# type: (bool) -> None
+self._prereleases = value
+_prefix_regex = re.compile(r"^([0-9]+)((?:a|b|c|rc)[0-9]+)$")
+def _version_split(version):
+# type: (str) -> List[str]
+result = []  # type: 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 _pad_version(left, right):
+# type: (List[str], 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="", prereleases=None):
+# type: (str, Optional[bool]) -> 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()
+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):
+# type: () -> str
+pre = (
+", prereleases={0!r}".format(self.prereleases)
+if self._prereleases is not None
+else ""
+)
+return "<SpecifierSet({0!r}{1})>".format(str(self), pre)
+def __str__(self):
+# type: () -> str
+return ",".join(sorted(str(s) for s in self._specs))
+def __hash__(self):
+# type: () -> int
+return hash(self._specs)
+def __and__(self, other):
+# type: (Union[SpecifierSet, str]) -> SpecifierSet
+if isinstance(other, string_types):
+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):
+# type: (object) -> bool
+if isinstance(other, (string_types, _IndividualSpecifier)):
+other = SpecifierSet(str(other))
+elif not isinstance(other, SpecifierSet):
+return NotImplemented
+return self._specs == other._specs
+def __ne__(self, other):
+# type: (object) -> bool
+if isinstance(other, (string_types, _IndividualSpecifier)):
+other = SpecifierSet(str(other))
+elif not isinstance(other, SpecifierSet):
+return NotImplemented
+return self._specs != other._specs
+def __len__(self):
+# type: () -> int
+return len(self._specs)
+def __iter__(self):
+# type: () -> Iterator[FrozenSet[_IndividualSpecifier]]
+return iter(self._specs)
+@property
+def prereleases(self):
+# type: () -> 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):
+# type: (bool) -> None
+self._prereleases = value
+def __contains__(self, item):
+# type: (Union[ParsedVersion, str]) -> bool
+return self.contains(item)
+def contains(self, item, prereleases=None):
+# type: (Union[ParsedVersion, str], Optional[bool]) -> 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,  # type: Iterable[Union[ParsedVersion, str]]
+prereleases=None,  # type: Optional[bool]
+):
+# type: (...) -> Iterable[Union[ParsedVersion, str]]
+# 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 = []  # type: List[Union[ParsedVersion, str]]
+found_prereleases = []  # type: List[Union[ParsedVersion, str]]
+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

Mercurial > repos > guerler > springsuite

comparison planemo/lib/python3.7/site-packages/packaging/specifiers.py @ 1:56ad4e20f292 draft