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|
import collections
import re
import itertools
_Version = collections.namedtuple(
"_Version", ["release", "pre_l", "pre_v"]
)
class Version():
_version_pattern = r"""v?(?:(?P<release>[0-9]+(?:[-\.][0-9]+)*)(?P<pre>[-_\.]?(?P<pre_l>(rc|alpha|beta|pre|preview|dev))[-_\.]?(?P<pre_v>[0-9]+)?)?)(.*)?"""
_regex = re.compile(r"^\s*" + _version_pattern + r"\s*$", re.VERBOSE | re.IGNORECASE)
def __init__(self, version):
match = self._regex.search(version)
if not match:
raise Exception("Invalid version: '{0}'".format(version))
self._version = _Version(
release=tuple(int(i) for i in match.group("release").replace("-",".").split(".")),
pre_l=match.group("pre_l"),
pre_v=match.group("pre_v")
)
self._key = _cmpkey(
self._version.release,
self._version.pre_l,
self._version.pre_v
)
def __le__(self, other):
if not isinstance(other, Version):
return NotImplemented
return self._key <= other._key
def __lt__(self, other):
if not isinstance(other, Version):
return NotImplemented
return self._key < other._key
def __ge__(self, other):
if not isinstance(other, Version):
return NotImplemented
return self._key >= other._key
def __gt__(self, other):
if not isinstance(other, Version):
return NotImplemented
return self._key > other._key
def _cmpkey(release, pre_l, pre_v):
# remove leading 0
_release = tuple(
reversed(list(itertools.dropwhile(lambda x: x == 0, reversed(release))))
)
if pre_l is None and pre_v is None:
_pre = float('inf')
else:
_pre = float(pre_v) if pre_v else float('-inf')
return _release, _pre
|
