/
semver.go
108 lines (101 loc) · 2.2 KB
/
semver.go
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
// Copyright 2016 govend. All rights reserved.
// Use of this source code is governed by an Apache 2.0
// license that can be found in the LICENSE file.
// Package semver provides a way to parse and compare semantic versions.
package semver
import (
"strconv"
"strings"
)
// SemVer describes a semantic version number.
type SemVer struct {
Major int
Minor int
Patch int
}
// New takes a semantic version number as a string and returns a SemVer object.
func New(verison string) (SemVer, error) {
sem := strings.Split(verison, ".")
switch len(sem) {
case 3:
major, err := strconv.Atoi(sem[0])
if err != nil {
return SemVer{}, err
}
minor, err := strconv.Atoi(sem[1])
if err != nil {
return SemVer{}, err
}
patch, err := strconv.Atoi(sem[2])
if err != nil {
return SemVer{}, err
}
return SemVer{Major: major, Minor: minor, Patch: patch}, nil
case 2:
major, err := strconv.Atoi(sem[0])
if err != nil {
return SemVer{}, err
}
minor, err := strconv.Atoi(sem[1])
if err != nil {
return SemVer{}, err
}
return SemVer{Major: major, Minor: minor, Patch: 0}, nil
default:
return SemVer{}, nil
}
}
// GreaterThan takes a SemVer object and reports true if it is greater than
// the SemVer object.
func (s SemVer) GreaterThan(sem SemVer) bool {
if s.Major > sem.Major {
return true
}
if s.Major == sem.Major {
if s.Minor > sem.Minor {
return true
}
if s.Minor == sem.Minor {
if s.Patch > sem.Patch {
return true
}
}
}
return false
}
// GreaterThanEqual takes a SemVer object and reports true if it is greater
// than or equal to the SemVer object.
func (s SemVer) GreaterThanEqual(sem SemVer) bool {
if s.Major > sem.Major {
return true
}
if s.Major == sem.Major {
if s.Minor > sem.Minor {
return true
}
if s.Minor == sem.Minor {
if s.Patch >= sem.Patch {
return true
}
}
}
return false
}
// LessThan takes a SemVer object and reports true if it is less than
// the SemVer object.
func (s SemVer) LessThan(sem SemVer) bool {
if s.Major < sem.Major {
return true
}
if s.Major == sem.Major {
if s.Minor < sem.Minor {
return true
}
if s.Minor == sem.Minor {
if s.Patch < sem.Patch {
return true
}
}
}
return false
}