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Edit File : version.py \| Size : 11.29 KB
# 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 Back

Edit File : version.py | Size : 11.29 KB

# 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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