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Code Editor : semver.py

"""Python helper for Semantic Versioning (http://semver.org/)"""
from __future__ import print_function

import argparse
import collections
from functools import wraps
import re
import sys

__version__ = "2.9.1"
__author__ = "Kostiantyn Rybnikov"
__author_email__ = "k-bx@k-bx.com"
__maintainer__ = ["Sebastien Celles", "Tom Schraitle"]
__maintainer_email__ = "s.celles@gmail.com"

_REGEX = re.compile(
    r"""
        ^
        (?P<major>0|[1-9]\d*)
        \.
        (?P<minor>0|[1-9]\d*)
        \.
        (?P<patch>0|[1-9]\d*)
        (?:-(?P<prerelease>
            (?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*)
            (?:\.(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*))*
        ))?
        (?:\+(?P<build>
            [0-9a-zA-Z-]+
            (?:\.[0-9a-zA-Z-]+)*
        ))?
        $
        """,
    re.VERBOSE,
)

_LAST_NUMBER = re.compile(r"(?:[^\d]*(\d+)[^\d]*)+")

#: Contains the implemented semver.org version of the spec
SEMVER_SPEC_VERSION = "2.0.0"

if not hasattr(__builtins__, "cmp"):

def cmp(a, b):
        return (a > b) - (a < b)

def parse(version):
    """
    Parse version to major, minor, patch, pre-release, build parts.

:param version: version string
    :return: dictionary with the keys 'build', 'major', 'minor', 'patch',
             and 'prerelease'. The prerelease or build keys can be None
             if not provided
    :rtype: dict

>>> ver = semver.parse('3.4.5-pre.2+build.4')
    >>> ver['major']
    3
    >>> ver['minor']
    4
    >>> ver['patch']
    5
    >>> ver['prerelease']
    'pre.2'
    >>> ver['build']
    'build.4'
    """
    match = _REGEX.match(version)
    if match is None:
        raise ValueError("%s is not valid SemVer string" % version)

version_parts = match.groupdict()

version_parts["major"] = int(version_parts["major"])
    version_parts["minor"] = int(version_parts["minor"])
    version_parts["patch"] = int(version_parts["patch"])

return version_parts

def comparator(operator):
    """Wrap a VersionInfo binary op method in a type-check."""

@wraps(operator)
    def wrapper(self, other):
        comparable_types = (VersionInfo, dict, tuple)
        if not isinstance(other, comparable_types):
            raise TypeError(
                "other type %r must be in %r" % (type(other), comparable_types)
            )
        return operator(self, other)

return wrapper

class VersionInfo(object):
    """
    A semver compatible version class.

:param int major: version when you make incompatible API changes.
    :param int minor: version when you add functionality in
                      a backwards-compatible manner.
    :param int patch: version when you make backwards-compatible bug fixes.
    :param str prerelease: an optional prerelease string
    :param str build: an optional build string
    """

__slots__ = ("_major", "_minor", "_patch", "_prerelease", "_build")

def __init__(self, major, minor=0, patch=0, prerelease=None, build=None):
        self._major = int(major)
        self._minor = int(minor)
        self._patch = int(patch)
        self._prerelease = None if prerelease is None else str(prerelease)
        self._build = None if build is None else str(build)

@property
    def major(self):
        """The major part of a version."""
        return self._major

@major.setter
    def major(self, value):
        raise AttributeError("attribute 'major' is readonly")

@property
    def minor(self):
        """The minor part of a version."""
        return self._minor

@minor.setter
    def minor(self, value):
        raise AttributeError("attribute 'minor' is readonly")

@property
    def patch(self):
        """The patch part of a version."""
        return self._patch

@patch.setter
    def patch(self, value):
        raise AttributeError("attribute 'patch' is readonly")

@property
    def prerelease(self):
        """The prerelease part of a version."""
        return self._prerelease

@prerelease.setter
    def prerelease(self, value):
        raise AttributeError("attribute 'prerelease' is readonly")

@property
    def build(self):
        """The build part of a version."""
        return self._build

@build.setter
    def build(self, value):
        raise AttributeError("attribute 'build' is readonly")

def _astuple(self):
        return (self.major, self.minor, self.patch, self.prerelease, self.build)

def _asdict(self):
        return collections.OrderedDict(
            (
                ("major", self.major),
                ("minor", self.minor),
                ("patch", self.patch),
                ("prerelease", self.prerelease),
                ("build", self.build),
            )
        )

def __iter__(self):
        """Implement iter(self)."""
        # As long as we support Py2.7, we can't use the "yield from" syntax
        for v in self._astuple():
            yield v

def bump_major(self):
        """
        Raise the major part of the version, return a new object but leave self
        untouched.

:return: new object with the raised major part
        :rtype: VersionInfo

>>> ver = semver.parse_version_info("3.4.5")
        >>> ver.bump_major()
        VersionInfo(major=4, minor=0, patch=0, prerelease=None, build=None)
        """
        return parse_version_info(bump_major(str(self)))

def bump_minor(self):
        """
        Raise the minor part of the version, return a new object but leave self
        untouched.

:return: new object with the raised minor part
        :rtype: VersionInfo

>>> ver = semver.parse_version_info("3.4.5")
        >>> ver.bump_minor()
        VersionInfo(major=3, minor=5, patch=0, prerelease=None, build=None)
        """
        return parse_version_info(bump_minor(str(self)))

def bump_patch(self):
        """
        Raise the patch part of the version, return a new object but leave self
        untouched.

:return: new object with the raised patch part
        :rtype: VersionInfo

>>> ver = semver.parse_version_info("3.4.5")
        >>> ver.bump_patch()
        VersionInfo(major=3, minor=4, patch=6, prerelease=None, build=None)
        """
        return parse_version_info(bump_patch(str(self)))

def bump_prerelease(self, token="rc"):
        """
        Raise the prerelease part of the version, return a new object but leave
        self untouched.

:param token: defaults to 'rc'
        :return: new object with the raised prerelease part
        :rtype: str

>>> ver = semver.parse_version_info("3.4.5-rc.1")
        >>> ver.bump_prerelease()
        VersionInfo(major=3, minor=4, patch=5, prerelease='rc.2', \
build=None)
        """
        return parse_version_info(bump_prerelease(str(self), token))

def bump_build(self, token="build"):
        """
        Raise the build part of the version, return a new object but leave self
        untouched.

:param token: defaults to 'build'
        :return: new object with the raised build part
        :rtype: str

>>> ver = semver.parse_version_info("3.4.5-rc.1+build.9")
        >>> ver.bump_build()
        VersionInfo(major=3, minor=4, patch=5, prerelease='rc.1', \
build='build.10')
        """
        return parse_version_info(bump_build(str(self), token))

@comparator
    def __eq__(self, other):
        return _compare_by_keys(self._asdict(), _to_dict(other)) == 0

@comparator
    def __ne__(self, other):
        return _compare_by_keys(self._asdict(), _to_dict(other)) != 0

@comparator
    def __lt__(self, other):
        return _compare_by_keys(self._asdict(), _to_dict(other)) < 0

@comparator
    def __le__(self, other):
        return _compare_by_keys(self._asdict(), _to_dict(other)) <= 0

@comparator
    def __gt__(self, other):
        return _compare_by_keys(self._asdict(), _to_dict(other)) > 0

@comparator
    def __ge__(self, other):
        return _compare_by_keys(self._asdict(), _to_dict(other)) >= 0

def __repr__(self):
        s = ", ".join("%s=%r" % (key, val) for key, val in self._asdict().items())
        return "%s(%s)" % (type(self).__name__, s)

def __str__(self):
        return format_version(*(self._astuple()))

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

@staticmethod
    def parse(version):
        """
        Parse version string to a VersionInfo instance.

:param version: version string
        :return: a :class:`semver.VersionInfo` instance
        :rtype: :class:`semver.VersionInfo`

>>> semver.VersionInfo.parse('3.4.5-pre.2+build.4')
        VersionInfo(major=3, minor=4, patch=5, \
prerelease='pre.2', build='build.4')
        """
        return parse_version_info(version)

def replace(self, **parts):
        """Replace one or more parts of a version and return a new
          :class:`semver.VersionInfo` object, but leave self untouched

:param dict parts: the parts to be updated. Valid keys are:
          ``major``, ``minor``, ``patch``, ``prerelease``, or ``build``
        :return: the new :class:`semver.VersionInfo` object with the changed
          parts
        :raises: TypeError, if ``parts`` contains invalid keys
        """
        version = self._asdict()
        version.update(parts)
        try:
            return VersionInfo(**version)
        except TypeError:
            unknownkeys = set(parts) - set(self._asdict())
            error = "replace() got %d unexpected keyword " "argument(s): %s" % (
                len(unknownkeys),
                ", ".join(unknownkeys),
            )
            raise TypeError(error)

@classmethod
    def isvalid(cls, version):
        """
        Check if the string is a valid semver version.

:param str version: the version string to check
        :return: True if the version string is a valid semver version, False
                 otherwise.
        :rtype: bool
        """
        try:
            cls.parse(version)
            return True
        except ValueError:
            return False

def _to_dict(obj):
    if isinstance(obj, VersionInfo):
        return obj._asdict()
    elif isinstance(obj, tuple):
        return VersionInfo(*obj)._asdict()
    return obj

def parse_version_info(version):
    """
    Parse version string to a VersionInfo instance.

:param version: version string
    :return: a :class:`VersionInfo` instance
    :rtype: :class:`VersionInfo`

>>> version_info = semver.parse_version_info("3.4.5-pre.2+build.4")
    >>> version_info.major
    3
    >>> version_info.minor
    4
    >>> version_info.patch
    5
    >>> version_info.prerelease
    'pre.2'
    >>> version_info.build
    'build.4'
    """
    parts = parse(version)
    version_info = VersionInfo(
        parts["major"],
        parts["minor"],
        parts["patch"],
        parts["prerelease"],
        parts["build"],
    )

return version_info

def _nat_cmp(a, b):
    def convert(text):
        return int(text) if re.match("^[0-9]+$", text) else text

def split_key(key):
        return [convert(c) for c in key.split(".")]

def cmp_prerelease_tag(a, b):
        if isinstance(a, int) and isinstance(b, int):
            return cmp(a, b)
        elif isinstance(a, int):
            return -1
        elif isinstance(b, int):
            return 1
        else:
            return cmp(a, b)

a, b = a or "", b or ""
    a_parts, b_parts = split_key(a), split_key(b)
    for sub_a, sub_b in zip(a_parts, b_parts):
        cmp_result = cmp_prerelease_tag(sub_a, sub_b)
        if cmp_result != 0:
            return cmp_result
    else:
        return cmp(len(a), len(b))

def _compare_by_keys(d1, d2):
    for key in ["major", "minor", "patch"]:
        v = cmp(d1.get(key), d2.get(key))
        if v:
            return v

rc1, rc2 = d1.get("prerelease"), d2.get("prerelease")
    rccmp = _nat_cmp(rc1, rc2)

if not rccmp:
        return 0
    if not rc1:
        return 1
    elif not rc2:
        return -1

return rccmp

def compare(ver1, ver2):
    """
    Compare two versions.

:param ver1: version string 1
    :param ver2: version string 2
    :return: The return value is negative if ver1 < ver2,
             zero if ver1 == ver2 and strictly positive if ver1 > ver2
    :rtype: int

>>> semver.compare("1.0.0", "2.0.0")
    -1
    >>> semver.compare("2.0.0", "1.0.0")
    1
    >>> semver.compare("2.0.0", "2.0.0")
    0
    """

v1, v2 = parse(ver1), parse(ver2)

return _compare_by_keys(v1, v2)

def match(version, match_expr):
    """
    Compare two versions through a comparison.

:param str version: a version string
    :param str match_expr: operator and version; valid operators are
          <   smaller than
          >   greater than
          >=  greator or equal than
          <=  smaller or equal than
          ==  equal
          !=  not equal
    :return: True if the expression matches the version, otherwise False
    :rtype: bool

>>> semver.match("2.0.0", ">=1.0.0")
    True
    >>> semver.match("1.0.0", ">1.0.0")
    False
    """
    prefix = match_expr[:2]
    if prefix in (">=", "<=", "==", "!="):
        match_version = match_expr[2:]
    elif prefix and prefix[0] in (">", "<"):
        prefix = prefix[0]
        match_version = match_expr[1:]
    else:
        raise ValueError(
            "match_expr parameter should be in format <op><ver>, "
            "where <op> is one of "
            "['<', '>', '==', '<=', '>=', '!=']. "
            "You provided: %r" % match_expr
        )

possibilities_dict = {
        ">": (1,),
        "<": (-1,),
        "==": (0,),
        "!=": (-1, 1),
        ">=": (0, 1),
        "<=": (-1, 0),
    }

possibilities = possibilities_dict[prefix]
    cmp_res = compare(version, match_version)

return cmp_res in possibilities

def max_ver(ver1, ver2):
    """
    Returns the greater version of two versions.

:param ver1: version string 1
    :param ver2: version string 2
    :return: the greater version of the two
    :rtype: :class:`VersionInfo`

>>> semver.max_ver("1.0.0", "2.0.0")
    '2.0.0'
    """
    cmp_res = compare(ver1, ver2)
    if cmp_res == 0 or cmp_res == 1:
        return ver1
    else:
        return ver2

def min_ver(ver1, ver2):
    """
    Returns the smaller version of two versions.

:param ver1: version string 1
    :param ver2: version string 2
    :return: the smaller version of the two
    :rtype: :class:`VersionInfo`

>>> semver.min_ver("1.0.0", "2.0.0")
    '1.0.0'
    """
    cmp_res = compare(ver1, ver2)
    if cmp_res == 0 or cmp_res == -1:
        return ver1
    else:
        return ver2

def format_version(major, minor, patch, prerelease=None, build=None):
    """
    Format a version according to the Semantic Versioning specification.

:param int major: the required major part of a version
    :param int minor: the required minor part of a version
    :param int patch: the required patch part of a version
    :param str prerelease: the optional prerelease part of a version
    :param str build: the optional build part of a version
    :return: the formatted string
    :rtype: str

>>> semver.format_version(3, 4, 5, 'pre.2', 'build.4')
    '3.4.5-pre.2+build.4'
    """
    version = "%d.%d.%d" % (major, minor, patch)
    if prerelease is not None:
        version = version + "-%s" % prerelease

if build is not None:
        version = version + "+%s" % build

return version

def _increment_string(string):
    """
    Look for the last sequence of number(s) in a string and increment, from:

http://code.activestate.com/recipes/442460-increment-numbers-in-a-string/#c1
    """
    match = _LAST_NUMBER.search(string)
    if match:
        next_ = str(int(match.group(1)) + 1)
        start, end = match.span(1)
        string = string[: max(end - len(next_), start)] + next_ + string[end:]
    return string

def bump_major(version):
    """
    Raise the major part of the version.

:param: version string
    :return: the raised version string
    :rtype: str

>>> semver.bump_major("3.4.5")
    '4.0.0'
    """
    verinfo = parse(version)
    return format_version(verinfo["major"] + 1, 0, 0)

def bump_minor(version):
    """
    Raise the minor part of the version.

:param: version string
    :return: the raised version string
    :rtype: str

>>> semver.bump_minor("3.4.5")
    '3.5.0'
    """
    verinfo = parse(version)
    return format_version(verinfo["major"], verinfo["minor"] + 1, 0)

def bump_patch(version):
    """
    Raise the patch part of the version.

:param: version string
    :return: the raised version string
    :rtype: str

>>> semver.bump_patch("3.4.5")
    '3.4.6'
    """
    verinfo = parse(version)
    return format_version(verinfo["major"], verinfo["minor"], verinfo["patch"] + 1)

def bump_prerelease(version, token="rc"):
    """
    Raise the prerelease part of the version.

:param version: version string
    :param token: defaults to 'rc'
    :return: the raised version string
    :rtype: str

>>> semver.bump_prerelease('3.4.5', 'dev')
    '3.4.5-dev.1'
    """
    verinfo = parse(version)
    verinfo["prerelease"] = _increment_string(
        verinfo["prerelease"] or (token or "rc") + ".0"
    )
    return format_version(
        verinfo["major"], verinfo["minor"], verinfo["patch"], verinfo["prerelease"]
    )

def bump_build(version, token="build"):
    """
    Raise the build part of the version.

:param version: version string
    :param token: defaults to 'build'
    :return: the raised version string
    :rtype: str

>>> semver.bump_build('3.4.5-rc.1+build.9')
    '3.4.5-rc.1+build.10'
    """
    verinfo = parse(version)
    verinfo["build"] = _increment_string(verinfo["build"] or (token or "build") + ".0")
    return format_version(
        verinfo["major"],
        verinfo["minor"],
        verinfo["patch"],
        verinfo["prerelease"],
        verinfo["build"],
    )

def finalize_version(version):
    """
    Remove any prerelease and build metadata from the version.

:param version: version string
    :return: the finalized version string
    :rtype: str

>>> semver.finalize_version('1.2.3-rc.5')
    '1.2.3'
    """
    verinfo = parse(version)
    return format_version(verinfo["major"], verinfo["minor"], verinfo["patch"])

def cmd_bump(args):
    """
    Subcommand: Bumps a version.

Synopsis: bump <PART> <VERSION>
    <PART> can be major, minor, patch, prerelease, or build

:param args: The parsed arguments
    :type args: :class:`argparse.Namespace`
    :return: the new, bumped version
    """
    maptable = {
        "major": "bump_major",
        "minor": "bump_minor",
        "patch": "bump_patch",
        "prerelease": "bump_prerelease",
        "build": "bump_build",
    }
    if args.bump is None:
        # When bump is called without arguments,
        # print the help and exit
        args.parser.parse_args(["bump", "-h"])

ver = parse_version_info(args.version)
    # get the respective method and call it
    func = getattr(ver, maptable[args.bump])
    return str(func())

def cmd_check(args):
    """
    Subcommand: Checks if a string is a valid semver version.

Synopsis: check <VERSION>

:param args: The parsed arguments
    :type args: :class:`argparse.Namespace`
    """
    if VersionInfo.isvalid(args.version):
        return None
    raise ValueError("Invalid version %r" % args.version)

def cmd_compare(args):
    """
    Subcommand: Compare two versions

Synopsis: compare <VERSION1> <VERSION2>

:param args: The parsed arguments
    :type args: :class:`argparse.Namespace`
    """
    return str(compare(args.version1, args.version2))

def createparser():
    """
    Create an :class:`argparse.ArgumentParser` instance.

:return: parser instance
    :rtype: :class:`argparse.ArgumentParser`
    """
    parser = argparse.ArgumentParser(prog=__package__, description=__doc__)

parser.add_argument(
        "--version", action="version", version="%(prog)s " + __version__
    )

s = parser.add_subparsers()
    # create compare subcommand
    parser_compare = s.add_parser("compare", help="Compare two versions")
    parser_compare.set_defaults(func=cmd_compare)
    parser_compare.add_argument("version1", help="First version")
    parser_compare.add_argument("version2", help="Second version")

# create bump subcommand
    parser_bump = s.add_parser("bump", help="Bumps a version")
    parser_bump.set_defaults(func=cmd_bump)
    sb = parser_bump.add_subparsers(title="Bump commands", dest="bump")

# Create subparsers for the bump subparser:
    for p in (
        sb.add_parser("major", help="Bump the major part of the version"),
        sb.add_parser("minor", help="Bump the minor part of the version"),
        sb.add_parser("patch", help="Bump the patch part of the version"),
        sb.add_parser("prerelease", help="Bump the prerelease part of the version"),
        sb.add_parser("build", help="Bump the build part of the version"),
    ):
        p.add_argument("version", help="Version to raise")

# Create the check subcommand
    parser_check = s.add_parser(
        "check", help="Checks if a string is a valid semver version"
    )
    parser_check.set_defaults(func=cmd_check)
    parser_check.add_argument("version", help="Version to check")

return parser

def process(args):
    """
    Process the input from the CLI.

:param args: The parsed arguments
    :type args: :class:`argparse.Namespace`
    :param parser: the parser instance
    :type parser: :class:`argparse.ArgumentParser`
    :return: result of the selected action
    :rtype: str
    """
    if not hasattr(args, "func"):
        args.parser.print_help()
        raise SystemExit()

# Call the respective function object:
    return args.func(args)

def main(cliargs=None):
    """
    Entry point for the application script.

:param list cliargs: Arguments to parse or None (=use :class:`sys.argv`)
    :return: error code
    :rtype: int
    """
    try:
        parser = createparser()
        args = parser.parse_args(args=cliargs)
        # Save parser instance:
        args.parser = parser
        result = process(args)
        if result is not None:
            print(result)
        return 0

except (ValueError, TypeError) as err:
        print("ERROR", err, file=sys.stderr)
        return 2

def replace(version, **parts):
    """
    Replace one or more parts of a version and return the new string.

:param str version: the version string to replace
    :param dict parts: the parts to be updated. Valid keys are:
      ``major``, ``minor``, ``patch``, ``prerelease``, or ``build``
    :return: the replaced version string
    :raises: TypeError, if ``parts`` contains invalid keys
    :rtype: str

>>> import semver
    >>> semver.replace("1.2.3", major=2, patch=10)
    '2.2.10'
    """
    version = parse_version_info(version)
    return str(version.replace(**parts))

if __name__ == "__main__":
    import doctest

doctest.testmod()

${this.title}

Code Editor : semver.py