737 lines
23 KiB
Python
737 lines
23 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2012-2017 The Python Software Foundation.
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# See LICENSE.txt and CONTRIBUTORS.txt.
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#
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"""
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Implementation of a flexible versioning scheme providing support for PEP-440,
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setuptools-compatible and semantic versioning.
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"""
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import logging
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import re
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from .compat import string_types
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from .util import parse_requirement
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__all__ = ['NormalizedVersion', 'NormalizedMatcher',
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'LegacyVersion', 'LegacyMatcher',
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'SemanticVersion', 'SemanticMatcher',
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'UnsupportedVersionError', 'get_scheme']
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logger = logging.getLogger(__name__)
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class UnsupportedVersionError(ValueError):
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"""This is an unsupported version."""
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pass
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class Version(object):
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def __init__(self, s):
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self._string = s = s.strip()
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self._parts = parts = self.parse(s)
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assert isinstance(parts, tuple)
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assert len(parts) > 0
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def parse(self, s):
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raise NotImplementedError('please implement in a subclass')
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def _check_compatible(self, other):
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if type(self) != type(other):
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raise TypeError('cannot compare %r and %r' % (self, other))
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def __eq__(self, other):
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self._check_compatible(other)
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return self._parts == other._parts
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def __ne__(self, other):
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return not self.__eq__(other)
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def __lt__(self, other):
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self._check_compatible(other)
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return self._parts < other._parts
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def __gt__(self, other):
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return not (self.__lt__(other) or self.__eq__(other))
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def __le__(self, other):
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return self.__lt__(other) or self.__eq__(other)
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def __ge__(self, other):
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return self.__gt__(other) or self.__eq__(other)
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# See http://docs.python.org/reference/datamodel#object.__hash__
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def __hash__(self):
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return hash(self._parts)
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def __repr__(self):
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return "%s('%s')" % (self.__class__.__name__, self._string)
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def __str__(self):
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return self._string
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@property
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def is_prerelease(self):
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raise NotImplementedError('Please implement in subclasses.')
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class Matcher(object):
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version_class = None
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# value is either a callable or the name of a method
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_operators = {
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'<': lambda v, c, p: v < c,
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'>': lambda v, c, p: v > c,
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'<=': lambda v, c, p: v == c or v < c,
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'>=': lambda v, c, p: v == c or v > c,
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'==': lambda v, c, p: v == c,
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'===': lambda v, c, p: v == c,
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# by default, compatible => >=.
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'~=': lambda v, c, p: v == c or v > c,
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'!=': lambda v, c, p: v != c,
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}
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# this is a method only to support alternative implementations
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# via overriding
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def parse_requirement(self, s):
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return parse_requirement(s)
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def __init__(self, s):
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if self.version_class is None:
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raise ValueError('Please specify a version class')
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self._string = s = s.strip()
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r = self.parse_requirement(s)
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if not r:
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raise ValueError('Not valid: %r' % s)
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self.name = r.name
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self.key = self.name.lower() # for case-insensitive comparisons
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clist = []
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if r.constraints:
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# import pdb; pdb.set_trace()
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for op, s in r.constraints:
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if s.endswith('.*'):
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if op not in ('==', '!='):
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raise ValueError('\'.*\' not allowed for '
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'%r constraints' % op)
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# Could be a partial version (e.g. for '2.*') which
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# won't parse as a version, so keep it as a string
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vn, prefix = s[:-2], True
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# Just to check that vn is a valid version
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self.version_class(vn)
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else:
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# Should parse as a version, so we can create an
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# instance for the comparison
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vn, prefix = self.version_class(s), False
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clist.append((op, vn, prefix))
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self._parts = tuple(clist)
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def match(self, version):
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"""
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Check if the provided version matches the constraints.
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:param version: The version to match against this instance.
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:type version: String or :class:`Version` instance.
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"""
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if isinstance(version, string_types):
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version = self.version_class(version)
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for operator, constraint, prefix in self._parts:
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f = self._operators.get(operator)
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if isinstance(f, string_types):
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f = getattr(self, f)
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if not f:
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msg = ('%r not implemented '
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'for %s' % (operator, self.__class__.__name__))
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raise NotImplementedError(msg)
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if not f(version, constraint, prefix):
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return False
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return True
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@property
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def exact_version(self):
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result = None
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if len(self._parts) == 1 and self._parts[0][0] in ('==', '==='):
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result = self._parts[0][1]
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return result
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def _check_compatible(self, other):
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if type(self) != type(other) or self.name != other.name:
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raise TypeError('cannot compare %s and %s' % (self, other))
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def __eq__(self, other):
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self._check_compatible(other)
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return self.key == other.key and self._parts == other._parts
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def __ne__(self, other):
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return not self.__eq__(other)
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# See http://docs.python.org/reference/datamodel#object.__hash__
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def __hash__(self):
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return hash(self.key) + hash(self._parts)
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def __repr__(self):
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return "%s(%r)" % (self.__class__.__name__, self._string)
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def __str__(self):
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return self._string
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PEP440_VERSION_RE = re.compile(r'^v?(\d+!)?(\d+(\.\d+)*)((a|b|c|rc)(\d+))?'
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r'(\.(post)(\d+))?(\.(dev)(\d+))?'
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r'(\+([a-zA-Z\d]+(\.[a-zA-Z\d]+)?))?$')
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def _pep_440_key(s):
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s = s.strip()
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m = PEP440_VERSION_RE.match(s)
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if not m:
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raise UnsupportedVersionError('Not a valid version: %s' % s)
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groups = m.groups()
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nums = tuple(int(v) for v in groups[1].split('.'))
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while len(nums) > 1 and nums[-1] == 0:
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nums = nums[:-1]
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if not groups[0]:
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epoch = 0
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else:
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epoch = int(groups[0])
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pre = groups[4:6]
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post = groups[7:9]
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dev = groups[10:12]
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local = groups[13]
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if pre == (None, None):
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pre = ()
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else:
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pre = pre[0], int(pre[1])
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if post == (None, None):
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post = ()
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else:
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post = post[0], int(post[1])
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if dev == (None, None):
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dev = ()
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else:
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dev = dev[0], int(dev[1])
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if local is None:
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local = ()
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else:
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parts = []
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for part in local.split('.'):
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# to ensure that numeric compares as > lexicographic, avoid
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# comparing them directly, but encode a tuple which ensures
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# correct sorting
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if part.isdigit():
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part = (1, int(part))
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else:
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part = (0, part)
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parts.append(part)
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local = tuple(parts)
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if not pre:
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# either before pre-release, or final release and after
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if not post and dev:
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# before pre-release
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pre = ('a', -1) # to sort before a0
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else:
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pre = ('z',) # to sort after all pre-releases
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# now look at the state of post and dev.
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if not post:
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post = ('_',) # sort before 'a'
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if not dev:
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dev = ('final',)
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#print('%s -> %s' % (s, m.groups()))
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return epoch, nums, pre, post, dev, local
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_normalized_key = _pep_440_key
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class NormalizedVersion(Version):
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"""A rational version.
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Good:
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1.2 # equivalent to "1.2.0"
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1.2.0
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1.2a1
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1.2.3a2
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1.2.3b1
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1.2.3c1
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1.2.3.4
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TODO: fill this out
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Bad:
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1 # minimum two numbers
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1.2a # release level must have a release serial
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1.2.3b
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"""
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def parse(self, s):
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result = _normalized_key(s)
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# _normalized_key loses trailing zeroes in the release
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# clause, since that's needed to ensure that X.Y == X.Y.0 == X.Y.0.0
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# However, PEP 440 prefix matching needs it: for example,
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# (~= 1.4.5.0) matches differently to (~= 1.4.5.0.0).
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m = PEP440_VERSION_RE.match(s) # must succeed
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groups = m.groups()
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self._release_clause = tuple(int(v) for v in groups[1].split('.'))
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return result
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PREREL_TAGS = set(['a', 'b', 'c', 'rc', 'dev'])
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@property
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def is_prerelease(self):
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return any(t[0] in self.PREREL_TAGS for t in self._parts if t)
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def _match_prefix(x, y):
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x = str(x)
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y = str(y)
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if x == y:
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return True
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if not x.startswith(y):
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return False
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n = len(y)
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return x[n] == '.'
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class NormalizedMatcher(Matcher):
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version_class = NormalizedVersion
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# value is either a callable or the name of a method
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_operators = {
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'~=': '_match_compatible',
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'<': '_match_lt',
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'>': '_match_gt',
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'<=': '_match_le',
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'>=': '_match_ge',
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'==': '_match_eq',
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'===': '_match_arbitrary',
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'!=': '_match_ne',
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}
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def _adjust_local(self, version, constraint, prefix):
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if prefix:
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strip_local = '+' not in constraint and version._parts[-1]
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else:
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# both constraint and version are
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# NormalizedVersion instances.
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# If constraint does not have a local component,
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# ensure the version doesn't, either.
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strip_local = not constraint._parts[-1] and version._parts[-1]
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if strip_local:
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s = version._string.split('+', 1)[0]
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version = self.version_class(s)
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return version, constraint
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def _match_lt(self, version, constraint, prefix):
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version, constraint = self._adjust_local(version, constraint, prefix)
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if version >= constraint:
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return False
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release_clause = constraint._release_clause
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pfx = '.'.join([str(i) for i in release_clause])
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return not _match_prefix(version, pfx)
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def _match_gt(self, version, constraint, prefix):
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version, constraint = self._adjust_local(version, constraint, prefix)
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if version <= constraint:
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return False
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release_clause = constraint._release_clause
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pfx = '.'.join([str(i) for i in release_clause])
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return not _match_prefix(version, pfx)
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def _match_le(self, version, constraint, prefix):
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version, constraint = self._adjust_local(version, constraint, prefix)
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return version <= constraint
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def _match_ge(self, version, constraint, prefix):
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version, constraint = self._adjust_local(version, constraint, prefix)
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return version >= constraint
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def _match_eq(self, version, constraint, prefix):
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version, constraint = self._adjust_local(version, constraint, prefix)
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if not prefix:
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result = (version == constraint)
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else:
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result = _match_prefix(version, constraint)
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return result
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def _match_arbitrary(self, version, constraint, prefix):
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return str(version) == str(constraint)
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def _match_ne(self, version, constraint, prefix):
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version, constraint = self._adjust_local(version, constraint, prefix)
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if not prefix:
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result = (version != constraint)
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else:
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result = not _match_prefix(version, constraint)
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return result
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def _match_compatible(self, version, constraint, prefix):
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version, constraint = self._adjust_local(version, constraint, prefix)
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if version == constraint:
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return True
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if version < constraint:
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return False
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# if not prefix:
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# return True
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release_clause = constraint._release_clause
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if len(release_clause) > 1:
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release_clause = release_clause[:-1]
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pfx = '.'.join([str(i) for i in release_clause])
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return _match_prefix(version, pfx)
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_REPLACEMENTS = (
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(re.compile('[.+-]$'), ''), # remove trailing puncts
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(re.compile(r'^[.](\d)'), r'0.\1'), # .N -> 0.N at start
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(re.compile('^[.-]'), ''), # remove leading puncts
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(re.compile(r'^\((.*)\)$'), r'\1'), # remove parentheses
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(re.compile(r'^v(ersion)?\s*(\d+)'), r'\2'), # remove leading v(ersion)
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(re.compile(r'^r(ev)?\s*(\d+)'), r'\2'), # remove leading v(ersion)
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(re.compile('[.]{2,}'), '.'), # multiple runs of '.'
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(re.compile(r'\b(alfa|apha)\b'), 'alpha'), # misspelt alpha
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(re.compile(r'\b(pre-alpha|prealpha)\b'),
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'pre.alpha'), # standardise
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(re.compile(r'\(beta\)$'), 'beta'), # remove parentheses
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)
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_SUFFIX_REPLACEMENTS = (
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(re.compile('^[:~._+-]+'), ''), # remove leading puncts
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(re.compile('[,*")([\\]]'), ''), # remove unwanted chars
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(re.compile('[~:+_ -]'), '.'), # replace illegal chars
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(re.compile('[.]{2,}'), '.'), # multiple runs of '.'
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(re.compile(r'\.$'), ''), # trailing '.'
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)
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_NUMERIC_PREFIX = re.compile(r'(\d+(\.\d+)*)')
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def _suggest_semantic_version(s):
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"""
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Try to suggest a semantic form for a version for which
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_suggest_normalized_version couldn't come up with anything.
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"""
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result = s.strip().lower()
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for pat, repl in _REPLACEMENTS:
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result = pat.sub(repl, result)
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if not result:
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result = '0.0.0'
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# Now look for numeric prefix, and separate it out from
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# the rest.
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#import pdb; pdb.set_trace()
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m = _NUMERIC_PREFIX.match(result)
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if not m:
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prefix = '0.0.0'
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suffix = result
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else:
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prefix = m.groups()[0].split('.')
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prefix = [int(i) for i in prefix]
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while len(prefix) < 3:
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prefix.append(0)
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if len(prefix) == 3:
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suffix = result[m.end():]
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else:
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suffix = '.'.join([str(i) for i in prefix[3:]]) + result[m.end():]
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prefix = prefix[:3]
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prefix = '.'.join([str(i) for i in prefix])
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suffix = suffix.strip()
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if suffix:
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#import pdb; pdb.set_trace()
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# massage the suffix.
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for pat, repl in _SUFFIX_REPLACEMENTS:
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suffix = pat.sub(repl, suffix)
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if not suffix:
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result = prefix
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else:
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sep = '-' if 'dev' in suffix else '+'
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result = prefix + sep + suffix
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if not is_semver(result):
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result = None
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return result
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def _suggest_normalized_version(s):
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"""Suggest a normalized version close to the given version string.
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If you have a version string that isn't rational (i.e. NormalizedVersion
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doesn't like it) then you might be able to get an equivalent (or close)
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rational version from this function.
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This does a number of simple normalizations to the given string, based
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on observation of versions currently in use on PyPI. Given a dump of
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those version during PyCon 2009, 4287 of them:
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- 2312 (53.93%) match NormalizedVersion without change
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with the automatic suggestion
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- 3474 (81.04%) match when using this suggestion method
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@param s {str} An irrational version string.
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@returns A rational version string, or None, if couldn't determine one.
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"""
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try:
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_normalized_key(s)
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return s # already rational
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except UnsupportedVersionError:
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pass
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rs = s.lower()
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# part of this could use maketrans
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for orig, repl in (('-alpha', 'a'), ('-beta', 'b'), ('alpha', 'a'),
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('beta', 'b'), ('rc', 'c'), ('-final', ''),
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('-pre', 'c'),
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('-release', ''), ('.release', ''), ('-stable', ''),
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('+', '.'), ('_', '.'), (' ', ''), ('.final', ''),
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('final', '')):
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rs = rs.replace(orig, repl)
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# if something ends with dev or pre, we add a 0
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rs = re.sub(r"pre$", r"pre0", rs)
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rs = re.sub(r"dev$", r"dev0", rs)
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# if we have something like "b-2" or "a.2" at the end of the
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# version, that is probably beta, alpha, etc
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# let's remove the dash or dot
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rs = re.sub(r"([abc]|rc)[\-\.](\d+)$", r"\1\2", rs)
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# 1.0-dev-r371 -> 1.0.dev371
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# 0.1-dev-r79 -> 0.1.dev79
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rs = re.sub(r"[\-\.](dev)[\-\.]?r?(\d+)$", r".\1\2", rs)
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# Clean: 2.0.a.3, 2.0.b1, 0.9.0~c1
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rs = re.sub(r"[.~]?([abc])\.?", r"\1", rs)
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# Clean: v0.3, v1.0
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if rs.startswith('v'):
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rs = rs[1:]
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# Clean leading '0's on numbers.
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#TODO: unintended side-effect on, e.g., "2003.05.09"
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# PyPI stats: 77 (~2%) better
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rs = re.sub(r"\b0+(\d+)(?!\d)", r"\1", rs)
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|
|
# Clean a/b/c with no version. E.g. "1.0a" -> "1.0a0". Setuptools infers
|
|
# zero.
|
|
# PyPI stats: 245 (7.56%) better
|
|
rs = re.sub(r"(\d+[abc])$", r"\g<1>0", rs)
|
|
|
|
# the 'dev-rNNN' tag is a dev tag
|
|
rs = re.sub(r"\.?(dev-r|dev\.r)\.?(\d+)$", r".dev\2", rs)
|
|
|
|
# clean the - when used as a pre delimiter
|
|
rs = re.sub(r"-(a|b|c)(\d+)$", r"\1\2", rs)
|
|
|
|
# a terminal "dev" or "devel" can be changed into ".dev0"
|
|
rs = re.sub(r"[\.\-](dev|devel)$", r".dev0", rs)
|
|
|
|
# a terminal "dev" can be changed into ".dev0"
|
|
rs = re.sub(r"(?![\.\-])dev$", r".dev0", rs)
|
|
|
|
# a terminal "final" or "stable" can be removed
|
|
rs = re.sub(r"(final|stable)$", "", rs)
|
|
|
|
# The 'r' and the '-' tags are post release tags
|
|
# 0.4a1.r10 -> 0.4a1.post10
|
|
# 0.9.33-17222 -> 0.9.33.post17222
|
|
# 0.9.33-r17222 -> 0.9.33.post17222
|
|
rs = re.sub(r"\.?(r|-|-r)\.?(\d+)$", r".post\2", rs)
|
|
|
|
# Clean 'r' instead of 'dev' usage:
|
|
# 0.9.33+r17222 -> 0.9.33.dev17222
|
|
# 1.0dev123 -> 1.0.dev123
|
|
# 1.0.git123 -> 1.0.dev123
|
|
# 1.0.bzr123 -> 1.0.dev123
|
|
# 0.1a0dev.123 -> 0.1a0.dev123
|
|
# PyPI stats: ~150 (~4%) better
|
|
rs = re.sub(r"\.?(dev|git|bzr)\.?(\d+)$", r".dev\2", rs)
|
|
|
|
# Clean '.pre' (normalized from '-pre' above) instead of 'c' usage:
|
|
# 0.2.pre1 -> 0.2c1
|
|
# 0.2-c1 -> 0.2c1
|
|
# 1.0preview123 -> 1.0c123
|
|
# PyPI stats: ~21 (0.62%) better
|
|
rs = re.sub(r"\.?(pre|preview|-c)(\d+)$", r"c\g<2>", rs)
|
|
|
|
# Tcl/Tk uses "px" for their post release markers
|
|
rs = re.sub(r"p(\d+)$", r".post\1", rs)
|
|
|
|
try:
|
|
_normalized_key(rs)
|
|
except UnsupportedVersionError:
|
|
rs = None
|
|
return rs
|
|
|
|
#
|
|
# Legacy version processing (distribute-compatible)
|
|
#
|
|
|
|
_VERSION_PART = re.compile(r'([a-z]+|\d+|[\.-])', re.I)
|
|
_VERSION_REPLACE = {
|
|
'pre': 'c',
|
|
'preview': 'c',
|
|
'-': 'final-',
|
|
'rc': 'c',
|
|
'dev': '@',
|
|
'': None,
|
|
'.': None,
|
|
}
|
|
|
|
|
|
def _legacy_key(s):
|
|
def get_parts(s):
|
|
result = []
|
|
for p in _VERSION_PART.split(s.lower()):
|
|
p = _VERSION_REPLACE.get(p, p)
|
|
if p:
|
|
if '0' <= p[:1] <= '9':
|
|
p = p.zfill(8)
|
|
else:
|
|
p = '*' + p
|
|
result.append(p)
|
|
result.append('*final')
|
|
return result
|
|
|
|
result = []
|
|
for p in get_parts(s):
|
|
if p.startswith('*'):
|
|
if p < '*final':
|
|
while result and result[-1] == '*final-':
|
|
result.pop()
|
|
while result and result[-1] == '00000000':
|
|
result.pop()
|
|
result.append(p)
|
|
return tuple(result)
|
|
|
|
|
|
class LegacyVersion(Version):
|
|
def parse(self, s):
|
|
return _legacy_key(s)
|
|
|
|
@property
|
|
def is_prerelease(self):
|
|
result = False
|
|
for x in self._parts:
|
|
if (isinstance(x, string_types) and x.startswith('*') and
|
|
x < '*final'):
|
|
result = True
|
|
break
|
|
return result
|
|
|
|
|
|
class LegacyMatcher(Matcher):
|
|
version_class = LegacyVersion
|
|
|
|
_operators = dict(Matcher._operators)
|
|
_operators['~='] = '_match_compatible'
|
|
|
|
numeric_re = re.compile(r'^(\d+(\.\d+)*)')
|
|
|
|
def _match_compatible(self, version, constraint, prefix):
|
|
if version < constraint:
|
|
return False
|
|
m = self.numeric_re.match(str(constraint))
|
|
if not m:
|
|
logger.warning('Cannot compute compatible match for version %s '
|
|
' and constraint %s', version, constraint)
|
|
return True
|
|
s = m.groups()[0]
|
|
if '.' in s:
|
|
s = s.rsplit('.', 1)[0]
|
|
return _match_prefix(version, s)
|
|
|
|
#
|
|
# Semantic versioning
|
|
#
|
|
|
|
_SEMVER_RE = re.compile(r'^(\d+)\.(\d+)\.(\d+)'
|
|
r'(-[a-z0-9]+(\.[a-z0-9-]+)*)?'
|
|
r'(\+[a-z0-9]+(\.[a-z0-9-]+)*)?$', re.I)
|
|
|
|
|
|
def is_semver(s):
|
|
return _SEMVER_RE.match(s)
|
|
|
|
|
|
def _semantic_key(s):
|
|
def make_tuple(s, absent):
|
|
if s is None:
|
|
result = (absent,)
|
|
else:
|
|
parts = s[1:].split('.')
|
|
# We can't compare ints and strings on Python 3, so fudge it
|
|
# by zero-filling numeric values so simulate a numeric comparison
|
|
result = tuple([p.zfill(8) if p.isdigit() else p for p in parts])
|
|
return result
|
|
|
|
m = is_semver(s)
|
|
if not m:
|
|
raise UnsupportedVersionError(s)
|
|
groups = m.groups()
|
|
major, minor, patch = [int(i) for i in groups[:3]]
|
|
# choose the '|' and '*' so that versions sort correctly
|
|
pre, build = make_tuple(groups[3], '|'), make_tuple(groups[5], '*')
|
|
return (major, minor, patch), pre, build
|
|
|
|
|
|
class SemanticVersion(Version):
|
|
def parse(self, s):
|
|
return _semantic_key(s)
|
|
|
|
@property
|
|
def is_prerelease(self):
|
|
return self._parts[1][0] != '|'
|
|
|
|
|
|
class SemanticMatcher(Matcher):
|
|
version_class = SemanticVersion
|
|
|
|
|
|
class VersionScheme(object):
|
|
def __init__(self, key, matcher, suggester=None):
|
|
self.key = key
|
|
self.matcher = matcher
|
|
self.suggester = suggester
|
|
|
|
def is_valid_version(self, s):
|
|
try:
|
|
self.matcher.version_class(s)
|
|
result = True
|
|
except UnsupportedVersionError:
|
|
result = False
|
|
return result
|
|
|
|
def is_valid_matcher(self, s):
|
|
try:
|
|
self.matcher(s)
|
|
result = True
|
|
except UnsupportedVersionError:
|
|
result = False
|
|
return result
|
|
|
|
def is_valid_constraint_list(self, s):
|
|
"""
|
|
Used for processing some metadata fields
|
|
"""
|
|
return self.is_valid_matcher('dummy_name (%s)' % s)
|
|
|
|
def suggest(self, s):
|
|
if self.suggester is None:
|
|
result = None
|
|
else:
|
|
result = self.suggester(s)
|
|
return result
|
|
|
|
_SCHEMES = {
|
|
'normalized': VersionScheme(_normalized_key, NormalizedMatcher,
|
|
_suggest_normalized_version),
|
|
'legacy': VersionScheme(_legacy_key, LegacyMatcher, lambda self, s: s),
|
|
'semantic': VersionScheme(_semantic_key, SemanticMatcher,
|
|
_suggest_semantic_version),
|
|
}
|
|
|
|
_SCHEMES['default'] = _SCHEMES['normalized']
|
|
|
|
|
|
def get_scheme(name):
|
|
if name not in _SCHEMES:
|
|
raise ValueError('unknown scheme name: %r' % name)
|
|
return _SCHEMES[name]
|