/usr/share/pyshared/sugar/bundle/bundleversion.py is in python-sugar-toolkit-0.84 0.84.17-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 | # Copyright (C) 2010, OLPC
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
#
# Based on the implementation of PEP 386, but adapted to our
# numeration schema.
#
import re
class InvalidVersionError(Exception):
"""The passed activity version can not be normalized."""
pass
VERSION_RE = re.compile(r'''
^
(?P<version>\d+) # minimum 'N'
(?P<extraversion>(?:\.\d+)*) # any number of extra '.N' segments
(?:
(?P<local>\-[a-zA-Z]*) # ignore any string in the comparison
)?
$''', re.VERBOSE)
class NormalizedVersion(object):
"""A normalized version.
Good:
1
1.2
1.2.3
1.2.3-peru
Bad:
1.2peru # must be separated with -
1.2. # can't end with '.'
1.02.5 # can't have a leading zero
"""
def __init__(self, activity_version):
"""Create a NormalizedVersion instance from a version string.
Keyword arguments:
activity_version -- The version string
"""
self._activity_version = activity_version
self.parts = []
self._local = None
if not isinstance(self._activity_version, str):
raise InvalidVersionError(self._activity_version)
match = VERSION_RE.search(self._activity_version)
if not match:
raise InvalidVersionError(self._activity_version)
groups = match.groupdict()
version = self._parse_version(groups['version'])
self.parts.append(version)
if groups['extraversion'] not in ('', None):
versions = self._parse_extraversions(groups['extraversion'][1:])
self.parts.extend(versions)
self._local = groups['local']
def _parse_version(self, version_string):
"""Verify that there is no leading zero and convert to integer.
Keyword arguments:
version -- string to be parsed
Return: Version
"""
if len(version_string) > 1 and version_string[0] == '0':
raise InvalidVersionError("Can not have leading zero in segment"
" %s in %r" % (version_string,
self._activity_version))
return int(version_string)
def _parse_extraversions(self, extraversion_string):
"""Split into N versions and convert them to integers, verify
that there are no leading zeros and drop trailing zeros.
Keyword arguments:
extraversion -- 'N.N.N...' sequence to be parsed
Return: List of extra versions
"""
nums = []
for n in extraversion_string.split("."):
if len(n) > 1 and n[0] == '0':
raise InvalidVersionError("Can not have leading zero in "
"segment %s in %r" % (n,
self._activity_version))
nums.append(int(n))
while nums and nums[-1] == 0:
nums.pop()
return nums
def __str__(self):
version_string = '.'.join(str(v) for v in self.parts)
if self._local != None:
version_string += self._local
return version_string
def __repr__(self):
return "%s('%s')" % (self.__class__.__name__, self)
def _cannot_compare(self, other):
raise TypeError("Can not compare %s and %s"
% (type(self).__name__, type(other).__name__))
def __eq__(self, other):
if not isinstance(other, NormalizedVersion):
self._cannot_compare(other)
return self.parts == other.parts
def __lt__(self, other):
if not isinstance(other, NormalizedVersion):
self._cannot_compare(other)
return self.parts < other.parts
def __ne__(self, other):
return not self.__eq__(other)
def __gt__(self, other):
return not (self.__lt__(other) or self.__eq__(other))
def __le__(self, other):
return self.__eq__(other) or self.__lt__(other)
def __ge__(self, other):
return self.__eq__(other) or self.__gt__(other)
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