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|
# Copyright (c) 2020 Matt Martz <matt@sivel.net>
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
from __future__ import annotations
import re
from ansible.module_utils.compat.version import LooseVersion, Version
# Regular expression taken from
# https://semver.org/#is-there-a-suggested-regular-expression-regex-to-check-a-semver-string
SEMVER_RE = 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<buildmetadata>[0-9a-zA-Z-]+(?:\.[0-9a-zA-Z-]+)*)
)?
$
""",
flags=re.X
)
class _Alpha:
"""Class to easily allow comparing strings
Largely this exists to make comparing an integer and a string on py3
so that it works like py2.
"""
def __init__(self, specifier):
self.specifier = specifier
def __repr__(self):
return repr(self.specifier)
def __eq__(self, other):
if isinstance(other, _Alpha):
return self.specifier == other.specifier
elif isinstance(other, str):
return self.specifier == other
return False
def __ne__(self, other):
return not self.__eq__(other)
def __lt__(self, other):
if isinstance(other, _Alpha):
return self.specifier < other.specifier
elif isinstance(other, str):
return self.specifier < other
elif isinstance(other, _Numeric):
return False
raise ValueError
def __le__(self, other):
return self.__lt__(other) or self.__eq__(other)
def __gt__(self, other):
return not self.__le__(other)
def __ge__(self, other):
return not self.__lt__(other)
class _Numeric:
"""Class to easily allow comparing numbers
Largely this exists to make comparing an integer and a string on py3
so that it works like py2.
"""
def __init__(self, specifier):
self.specifier = int(specifier)
def __repr__(self):
return repr(self.specifier)
def __eq__(self, other):
if isinstance(other, _Numeric):
return self.specifier == other.specifier
elif isinstance(other, int):
return self.specifier == other
return False
def __ne__(self, other):
return not self.__eq__(other)
def __lt__(self, other):
if isinstance(other, _Numeric):
return self.specifier < other.specifier
elif isinstance(other, int):
return self.specifier < other
elif isinstance(other, _Alpha):
return True
raise ValueError
def __le__(self, other):
return self.__lt__(other) or self.__eq__(other)
def __gt__(self, other):
return not self.__le__(other)
def __ge__(self, other):
return not self.__lt__(other)
class SemanticVersion(Version):
"""Version comparison class that implements Semantic Versioning 2.0.0
Based off of ``distutils.version.Version``
"""
version_re = SEMVER_RE
def __init__(self, vstring=None):
self.vstring = vstring
self.major = None
self.minor = None
self.patch = None
self.prerelease = ()
self.buildmetadata = ()
if vstring:
self.parse(vstring)
def __repr__(self):
return 'SemanticVersion(%r)' % self.vstring
@staticmethod
def from_loose_version(loose_version):
"""This method is designed to take a ``LooseVersion``
and attempt to construct a ``SemanticVersion`` from it
This is useful where you want to do simple version math
without requiring users to provide a compliant semver.
"""
if not isinstance(loose_version, LooseVersion):
raise ValueError("%r is not a LooseVersion" % loose_version)
try:
version = loose_version.version[:]
except AttributeError:
raise ValueError("%r is not a LooseVersion" % loose_version)
extra_idx = 3
for marker in ('-', '+'):
try:
idx = version.index(marker)
except ValueError:
continue
else:
if idx < extra_idx:
extra_idx = idx
version = version[:extra_idx]
if version and set(type(v) for v in version) != set((int,)):
raise ValueError("Non integer values in %r" % loose_version)
# Extra is everything to the right of the core version
extra = re.search('[+-].+$', loose_version.vstring)
version = version + [0] * (3 - len(version))
return SemanticVersion(
'%s%s' % (
'.'.join(str(v) for v in version),
extra.group(0) if extra else ''
)
)
def parse(self, vstring):
match = SEMVER_RE.match(vstring)
if not match:
raise ValueError("invalid semantic version '%s'" % vstring)
(major, minor, patch, prerelease, buildmetadata) = match.group(1, 2, 3, 4, 5)
self.vstring = vstring
self.major = int(major)
self.minor = int(minor)
self.patch = int(patch)
if prerelease:
self.prerelease = tuple(_Numeric(x) if x.isdigit() else _Alpha(x) for x in prerelease.split('.'))
if buildmetadata:
self.buildmetadata = tuple(_Numeric(x) if x.isdigit() else _Alpha(x) for x in buildmetadata.split('.'))
@property
def core(self):
return self.major, self.minor, self.patch
@property
def is_prerelease(self):
return bool(self.prerelease)
@property
def is_stable(self):
# Major version zero (0.y.z) is for initial development. Anything MAY change at any time.
# The public API SHOULD NOT be considered stable.
# https://semver.org/#spec-item-4
return not (self.major == 0 or self.is_prerelease)
def _cmp(self, other):
if isinstance(other, str):
other = SemanticVersion(other)
if self.core != other.core:
# if the core version doesn't match
# prerelease and buildmetadata doesn't matter
if self.core < other.core:
return -1
else:
return 1
if not any((self.prerelease, other.prerelease)):
return 0
if self.prerelease and not other.prerelease:
return -1
elif not self.prerelease and other.prerelease:
return 1
else:
if self.prerelease < other.prerelease:
return -1
elif self.prerelease > other.prerelease:
return 1
# Build metadata MUST be ignored when determining version precedence
# https://semver.org/#spec-item-10
# With the above in mind it is ignored here
# If we have made it here, things should be equal
return 0
# The Py2 and Py3 implementations of distutils.version.Version
# are quite different, this makes the Py2 and Py3 implementations
# the same
def __eq__(self, other):
return self._cmp(other) == 0
def __ne__(self, other):
return not self.__eq__(other)
def __lt__(self, other):
return self._cmp(other) < 0
def __le__(self, other):
return self._cmp(other) <= 0
def __gt__(self, other):
return self._cmp(other) > 0
def __ge__(self, other):
return self._cmp(other) >= 0
|
