FM / packaging

/snap/core20/2769/usr/lib/python3/dist-packages/pkg_resources/_vendor/packaging/

/snap/core20/2769/usr/lib/python3/dist-packages/pkg_resources/_vendor/packaging

Name	Size	Mode	Actions
__pycache__/	-	0755	rm
markers.py	8248	0644	edit dl rm
requirements.py	4355	0644	edit dl rm
specifiers.py	28025	0644	edit dl rm
utils.py	421	0644	edit dl rm
version.py	11556	0644	edit dl rm
_compat.py	860	0644	edit dl rm
_structures.py	1416	0644	edit dl rm
__about__.py	720	0644	edit dl rm
__init__.py	513	0644	edit dl rm

Edit: /snap/core20/2769/usr/lib/python3/dist-packages/pkg_resources/_vendor/packaging/version.py (11556B)

# 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 collections
import itertools
import re

from ._structures import Infinity

__all__ = [
    "parse", "Version", "LegacyVersion", "InvalidVersion", "VERSION_PATTERN"
]

_Version = collections.namedtuple(
    "_Version",
    ["epoch", "release", "dev", "pre", "post", "local"],
)

def parse(version):
    """
    Parse the given version string and return either a :class:`Version` object
    or a :class:`LegacyVersion` object depending on if the given version is
    a valid PEP 440 version or a legacy version.
    """
    try:
        return Version(version)
    except InvalidVersion:
        return LegacyVersion(version)

class InvalidVersion(ValueError):
    """
    An invalid version was found, users should refer to PEP 440.
    """

class _BaseVersion(object):

def __hash__(self):
        return hash(self._key)

def __lt__(self, other):
        return self._compare(other, lambda s, o: s < o)

def __le__(self, other):
        return self._compare(other, lambda s, o: s <= o)

def __eq__(self, other):
        return self._compare(other, lambda s, o: s == o)

def __ge__(self, other):
        return self._compare(other, lambda s, o: s >= o)

def __gt__(self, other):
        return self._compare(other, lambda s, o: s > o)

def __ne__(self, other):
        return self._compare(other, lambda s, o: s != o)

def _compare(self, other, method):
        if not isinstance(other, _BaseVersion):
            return NotImplemented

return method(self._key, other._key)

class LegacyVersion(_BaseVersion):

def __init__(self, version):
        self._version = str(version)
        self._key = _legacy_cmpkey(self._version)

def __str__(self):
        return self._version

def __repr__(self):
        return "<LegacyVersion({0})>".format(repr(str(self)))

@property
    def public(self):
        return self._version

@property
    def base_version(self):
        return self._version

@property
    def local(self):
        return None

@property
    def is_prerelease(self):
        return False

@property
    def is_postrelease(self):
        return False

_legacy_version_component_re = re.compile(
    r"(\d+ | [a-z]+ | \.| -)", re.VERBOSE,
)

_legacy_version_replacement_map = {
    "pre": "c", "preview": "c", "-": "final-", "rc": "c", "dev": "@",
}

def _parse_version_parts(s):
    for part in _legacy_version_component_re.split(s):
        part = _legacy_version_replacement_map.get(part, part)

if not part or part == ".":
            continue

if part[:1] in "0123456789":
            # pad for numeric comparison
            yield part.zfill(8)
        else:
            yield "*" + part

# ensure that alpha/beta/candidate are before final
    yield "*final"

def _legacy_cmpkey(version):
    # We hardcode an epoch of -1 here. A PEP 440 version can only have a epoch
    # greater than or equal to 0. This will effectively put the LegacyVersion,
    # which uses the defacto standard originally implemented by setuptools,
    # as before all PEP 440 versions.
    epoch = -1

# This scheme is taken from pkg_resources.parse_version setuptools prior to
    # it's adoption of the packaging library.
    parts = []
    for part in _parse_version_parts(version.lower()):
        if part.startswith("*"):
            # remove "-" before a prerelease tag
            if part < "*final":
                while parts and parts[-1] == "*final-":
                    parts.pop()

# remove trailing zeros from each series of numeric parts
            while parts and parts[-1] == "00000000":
                parts.pop()

parts.append(part)
    parts = tuple(parts)

return epoch, parts

# Deliberately not anchored to the start and end of the string, to make it
# easier for 3rd party code to reuse
VERSION_PATTERN = r"""
    v?
    (?:
        (?:(?P<epoch>[0-9]+)!)?                           # epoch
        (?P<release>[0-9]+(?:\.[0-9]+)*)                  # release segment
        (?P<pre>                                          # pre-release
            [-_\.]?
            (?P<pre_l>(a|b|c|rc|alpha|beta|pre|preview))
            [-_\.]?
            (?P<pre_n>[0-9]+)?
        )?
        (?P<post>                                         # post release
            (?:-(?P<post_n1>[0-9]+))
            |
            (?:
                [-_\.]?
                (?P<post_l>post|rev|r)
                [-_\.]?
                (?P<post_n2>[0-9]+)?
            )
        )?
        (?P<dev>                                          # dev release
            [-_\.]?
            (?P<dev_l>dev)
            [-_\.]?
            (?P<dev_n>[0-9]+)?
        )?
    )
    (?:\+(?P<local>[a-z0-9]+(?:[-_\.][a-z0-9]+)*))?       # local version
"""

class Version(_BaseVersion):

_regex = re.compile(
        r"^\s*" + VERSION_PATTERN + r"\s*$",
        re.VERBOSE | re.IGNORECASE,
    )

def __init__(self, version):
        # Validate the version and parse it into pieces
        match = self._regex.search(version)
        if not match:
            raise InvalidVersion("Invalid version: '{0}'".format(version))

# Store the parsed out pieces of the version
        self._version = _Version(
            epoch=int(match.group("epoch")) if match.group("epoch") else 0,
            release=tuple(int(i) for i in match.group("release").split(".")),
            pre=_parse_letter_version(
                match.group("pre_l"),
                match.group("pre_n"),
            ),
            post=_parse_letter_version(
                match.group("post_l"),
                match.group("post_n1") or match.group("post_n2"),
            ),
            dev=_parse_letter_version(
                match.group("dev_l"),
                match.group("dev_n"),
            ),
            local=_parse_local_version(match.group("local")),
        )

# Generate a key which will be used for sorting
        self._key = _cmpkey(
            self._version.epoch,
            self._version.release,
            self._version.pre,
            self._version.post,
            self._version.dev,
            self._version.local,
        )

def __repr__(self):
        return "<Version({0})>".format(repr(str(self)))

def __str__(self):
        parts = []

# Epoch
        if self._version.epoch != 0:
            parts.append("{0}!".format(self._version.epoch))

# Release segment
        parts.append(".".join(str(x) for x in self._version.release))

# Pre-release
        if self._version.pre is not None:
            parts.append("".join(str(x) for x in self._version.pre))

# Post-release
        if self._version.post is not None:
            parts.append(".post{0}".format(self._version.post[1]))

# Development release
        if self._version.dev is not None:
            parts.append(".dev{0}".format(self._version.dev[1]))

# Local version segment
        if self._version.local is not None:
            parts.append(
                "+{0}".format(".".join(str(x) for x in self._version.local))
            )

return "".join(parts)

@property
    def public(self):
        return str(self).split("+", 1)[0]

@property
    def base_version(self):
        parts = []

# Epoch
        if self._version.epoch != 0:
            parts.append("{0}!".format(self._version.epoch))

# Release segment
        parts.append(".".join(str(x) for x in self._version.release))

return "".join(parts)

@property
    def local(self):
        version_string = str(self)
        if "+" in version_string:
            return version_string.split("+", 1)[1]

@property
    def is_prerelease(self):
        return bool(self._version.dev or self._version.pre)

@property
    def is_postrelease(self):
        return bool(self._version.post)

def _parse_letter_version(letter, number):
    if letter:
        # We consider there to be an implicit 0 in a pre-release if there is
        # not a numeral associated with it.
        if number is None:
            number = 0

# We normalize any letters to their lower case form
        letter = letter.lower()

# We consider some words to be alternate spellings of other words and
        # in those cases we want to normalize the spellings to our preferred
        # spelling.
        if letter == "alpha":
            letter = "a"
        elif letter == "beta":
            letter = "b"
        elif letter in ["c", "pre", "preview"]:
            letter = "rc"
        elif letter in ["rev", "r"]:
            letter = "post"

return letter, int(number)
    if not letter and number:
        # We assume if we are given a number, but we are not given a letter
        # then this is using the implicit post release syntax (e.g. 1.0-1)
        letter = "post"

return letter, int(number)

_local_version_seperators = re.compile(r"[\._-]")

def _parse_local_version(local):
    """
    Takes a string like abc.1.twelve and turns it into ("abc", 1, "twelve").
    """
    if local is not None:
        return tuple(
            part.lower() if not part.isdigit() else int(part)
            for part in _local_version_seperators.split(local)
        )

def _cmpkey(epoch, release, pre, post, dev, local):
    # When we compare a release version, we want to compare it with all of the
    # trailing zeros removed. So we'll use a reverse the list, drop all the now
    # leading zeros until we come to something non zero, then take the rest
    # re-reverse it back into the correct order and make it a tuple and use
    # that for our sorting key.
    release = tuple(
        reversed(list(
            itertools.dropwhile(
                lambda x: x == 0,
                reversed(release),
            )
        ))
    )

# We need to "trick" the sorting algorithm to put 1.0.dev0 before 1.0a0.
    # We'll do this by abusing the pre segment, but we _only_ want to do this
    # if there is not a pre or a post segment. If we have one of those then
    # the normal sorting rules will handle this case correctly.
    if pre is None and post is None and dev is not None:
        pre = -Infinity
    # Versions without a pre-release (except as noted above) should sort after
    # those with one.
    elif pre is None:
        pre = Infinity

# Versions without a post segment should sort before those with one.
    if post is None:
        post = -Infinity

# Versions without a development segment should sort after those with one.
    if dev is None:
        dev = Infinity

if local is None:
        # Versions without a local segment should sort before those with one.
        local = -Infinity
    else:
        # Versions with a local segment need that segment parsed to implement
        # the sorting rules in PEP440.
        # - Alpha numeric segments sort before numeric segments
        # - Alpha numeric segments sort lexicographically
        # - Numeric segments sort numerically
        # - Shorter versions sort before longer versions when the prefixes
        #   match exactly
        local = tuple(
            (i, "") if isinstance(i, int) else (-Infinity, i)
            for i in local
        )

return epoch, release, pre, post, dev, local

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