/
ami.go
48 lines (41 loc) · 1.21 KB
/
ami.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
package nodegroup
import (
"strings"
"github.com/blang/semver"
"github.com/pkg/errors"
)
// ParseReleaseVersion parses an AMI release version string that's in the format `1.18.8-20201007`
func ParseReleaseVersion(releaseVersion string) (AMIReleaseVersion, error) {
parts := strings.Split(releaseVersion, "-")
if len(parts) != 2 {
return AMIReleaseVersion{}, errors.Errorf("unexpected format for release version: %q", releaseVersion)
}
v, err := semver.ParseTolerant(parts[0])
if err != nil {
return AMIReleaseVersion{}, errors.Wrap(err, "invalid SemVer version")
}
return AMIReleaseVersion{
Version: v,
Date: parts[1],
}, nil
}
type AMIReleaseVersion struct {
Version semver.Version
Date string
}
// LTE checks if a is less than or equal to b.
func (a AMIReleaseVersion) LTE(b AMIReleaseVersion) bool {
return a.Compare(b) <= 0
}
// GTE checks if a is greater than or equal to b.
func (a AMIReleaseVersion) GTE(b AMIReleaseVersion) bool {
return a.Compare(b) >= 0
}
// Compare returns 0 if a==b, -1 if a < b, and +1 if a > b.
func (a AMIReleaseVersion) Compare(b AMIReleaseVersion) int {
cmp := a.Version.Compare(b.Version)
if cmp == 0 {
return strings.Compare(a.Date, b.Date)
}
return cmp
}