/
version.py
55 lines (45 loc) · 1.71 KB
/
version.py
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
# Copyright (c) 2014 Ahmed H. Ismail
# 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.
from __future__ import absolute_import
from __future__ import print_function
from __future__ import unicode_literals
from functools import total_ordering
import re
@total_ordering
class Version(object):
"""
Version number composed of major and minor.
Fields:
- major: Major number, int.
- minor: Minor number, int.
"""
VERS_STR_REGEX = re.compile(r'(\d+)\.(\d+)')
def __init__(self, major, minor):
self.major = major
self.minor = minor
@classmethod
def from_str(cls, value):
"""Constructs a Version from a string.
Returns None if string not in N.N form where N represents a
number.
"""
m = cls.VERS_STR_REGEX.match(value)
if m is not None:
return cls(int(m.group(1)), int(m.group(2)))
else:
return None
def __str__(self):
return 'SPDX-{major}.{minor}'.format(**self.__dict__)
def __eq__(self, other):
return self.major == other.major and self.minor == other.minor
def __lt__(self, other):
return (self.major < other.major
or (self.major == other.major and self.minor < other.minor))