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# Copyright 2019 Gordon Messmer <gordon.messmer@gmail.com>
#
# Upstream: https://github.com/gordonmessmer/pyreq2rpm
#
# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation files
# (the "Software"), to deal in the Software without restriction,
# including without limitation the rights to use, copy, modify, merge,
# publish, distribute, sublicense, and/or sell copies of the Software,
# and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
from packaging.requirements import Requirement
from packaging.version import parse as parse_version
class RpmVersion():
def __init__(self, version_id):
version = parse_version(version_id)
if isinstance(version._version, str):
self.version = version._version
else:
self.epoch = version._version.epoch
self.version = list(version._version.release)
self.pre = version._version.pre
self.dev = version._version.dev
self.post = version._version.post
# version.local is ignored as it is not expected to appear
# in public releases
# https://www.python.org/dev/peps/pep-0440/#local-version-identifiers
def is_legacy(self):
return isinstance(self.version, str)
def increment(self):
self.version[-1] += 1
self.pre = None
self.dev = None
self.post = None
return self
def __str__(self):
if self.is_legacy():
return self.version
if self.epoch:
rpm_epoch = str(self.epoch) + ':'
else:
rpm_epoch = ''
while len(self.version) > 1 and self.version[-1] == 0:
self.version.pop()
rpm_version = '.'.join(str(x) for x in self.version)
if self.pre:
rpm_suffix = '~{}'.format(''.join(str(x) for x in self.pre))
elif self.dev:
rpm_suffix = '~~{}'.format(''.join(str(x) for x in self.dev))
elif self.post:
rpm_suffix = '^post{}'.format(self.post[1])
else:
rpm_suffix = ''
return '{}{}{}'.format(rpm_epoch, rpm_version, rpm_suffix)
def convert_compatible(name, operator, version_id):
if version_id.endswith('.*'):
return 'Invalid version'
version = RpmVersion(version_id)
if version.is_legacy():
# LegacyVersions are not supported in this context
return 'Invalid version'
if len(version.version) == 1:
return 'Invalid version'
upper_version = RpmVersion(version_id)
upper_version.version.pop()
upper_version.increment()
return '({} >= {} with {} < {})'.format(
name, version, name, upper_version)
def convert_equal(name, operator, version_id):
if version_id.endswith('.*'):
version_id = version_id[:-2] + '.0'
return convert_compatible(name, '~=', version_id)
version = RpmVersion(version_id)
return '{} = {}'.format(name, version)
def convert_arbitrary_equal(name, operator, version_id):
if version_id.endswith('.*'):
return 'Invalid version'
version = RpmVersion(version_id)
return '{} = {}'.format(name, version)
def convert_not_equal(name, operator, version_id):
if version_id.endswith('.*'):
version_id = version_id[:-2]
version = RpmVersion(version_id)
if version.is_legacy():
# LegacyVersions are not supported in this context
return 'Invalid version'
version_gt = RpmVersion(version_id).increment()
version_gt_operator = '>='
# Prevent dev and pre-releases from satisfying a < requirement
version = '{}~~'.format(version)
else:
version = RpmVersion(version_id)
version_gt = version
version_gt_operator = '>'
return '({} < {} or {} {} {})'.format(
name, version, name, version_gt_operator, version_gt)
def convert_ordered(name, operator, version_id):
if version_id.endswith('.*'):
# PEP 440 does not define semantics for prefix matching
# with ordered comparisons
# see: https://github.com/pypa/packaging/issues/320
# and: https://github.com/pypa/packaging/issues/321
# This style of specifier is officially "unsupported",
# even though it is processed. Support may be removed
# in version 21.0.
version_id = version_id[:-2]
version = RpmVersion(version_id)
if operator == '>':
# distutils will allow a prefix match with '>'
operator = '>='
if operator == '<=':
# distutils will not allow a prefix match with '<='
operator = '<'
else:
version = RpmVersion(version_id)
# For backwards compatibility, fallback to previous behavior with LegacyVersions
if not version.is_legacy():
# Prevent dev and pre-releases from satisfying a < requirement
if operator == '<' and not version.pre and not version.dev and not version.post:
version = '{}~~'.format(version)
# Prevent post-releases from satisfying a > requirement
if operator == '>' and not version.pre and not version.dev and not version.post:
version = '{}.0'.format(version)
return '{} {} {}'.format(name, operator, version)
OPERATORS = {'~=': convert_compatible,
'==': convert_equal,
'===': convert_arbitrary_equal,
'!=': convert_not_equal,
'<=': convert_ordered,
'<': convert_ordered,
'>=': convert_ordered,
'>': convert_ordered}
def convert(name, operator, version_id):
return OPERATORS[operator](name, operator, version_id)
def convert_requirement(req):
parsed_req = Requirement.parse(req)
reqs = []
for spec in parsed_req.specs:
reqs.append(convert(parsed_req.project_name, spec[0], spec[1]))
if len(reqs) == 0:
return parsed_req.project_name
if len(reqs) == 1:
return reqs[0]
else:
reqs.sort()
return '({})'.format(' with '.join(reqs))
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