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# Copyright (c) 2013 OpenStack Foundation
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""
Helpers for comparing version strings.
.. versionadded:: 1.6
"""
import functools
import operator
import re
import packaging.version
from oslo_utils._i18n import _
def is_compatible(requested_version, current_version, same_major=True):
"""Determine whether `requested_version` is satisfied by
`current_version`; in other words, `current_version` is >=
`requested_version`.
:param requested_version: version to check for compatibility
:param current_version: version to check against
:param same_major: if True, the major version must be identical between
`requested_version` and `current_version`. This is used when a
major-version difference indicates incompatibility between the two
versions. Since this is the common-case in practice, the default is
True.
:returns: True if compatible, False if not
"""
requested = packaging.version.Version(requested_version)
current = packaging.version.Version(current_version)
if same_major:
if requested.major != current.major:
return False
return current >= requested
def convert_version_to_int(version):
"""Convert a version to an integer.
*version* must be a string with dots or a tuple of integers.
.. versionadded:: 2.0
"""
try:
if isinstance(version, str):
version = convert_version_to_tuple(version)
if isinstance(version, tuple):
return functools.reduce(lambda x, y: (x * 1000) + y, version)
except Exception as ex:
msg = _("Version %s is invalid.") % version
raise ValueError(msg) from ex
def convert_version_to_str(version_int):
"""Convert a version integer to a string with dots.
.. versionadded:: 2.0
"""
version_numbers = []
factor = 1000
while version_int != 0:
version_number = version_int - (version_int // factor * factor)
version_numbers.insert(0, str(version_number))
version_int = version_int // factor
return '.'.join(map(str, version_numbers))
def convert_version_to_tuple(version_str):
"""Convert a version string with dots to a tuple.
.. versionadded:: 2.0
"""
version_str = re.sub(r'(\d+)(a|alpha|b|beta|rc)\d+$', '\\1', version_str)
return tuple(int(part) for part in version_str.split('.'))
class VersionPredicate:
"""Parse version predicate and check version requirements
This is based on the implementation of distutils.VersionPredicate
.. versionadded:: 7.4
"""
_PREDICATE_MATCH = re.compile(r"^\s*(<=|>=|<|>|!=|==)\s*([^\s]+)\s*$")
_COMP_MAP = {
"<": operator.lt, "<=": operator.le, "==": operator.eq,
">": operator.gt, ">=": operator.ge, "!=": operator.ne
}
def __init__(self, predicate_str):
self.pred = [self._parse_predicate(pred) for pred
in predicate_str.split(',')]
def _parse_predicate(self, pred):
res = self._PREDICATE_MATCH.match(pred)
if not res:
raise ValueError("bad package restriction syntax: %s" % pred)
cond, ver_str = res.groups()
return (cond, packaging.version.Version(ver_str))
def satisfied_by(self, version_str):
version = packaging.version.Version(version_str)
for cond, ver in self.pred:
if not self._COMP_MAP[cond](version, ver):
return False
return True
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