mirror of https://github.com/hashicorp/consul
89 lines
2.3 KiB
Go
89 lines
2.3 KiB
Go
|
/*
|
||
|
|
Copyright 2018 The Kubernetes Authors.
|
||
|
|
|
||
|
|
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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
package version
|
||
|
|
|
||
|
|
import (
|
||
|
|
"regexp"
|
||
|
|
"strconv"
|
||
|
|
"strings"
|
||
|
|
)
|
||
|
|
|
||
|
|
type versionType int
|
||
|
|
|
||
|
|
const (
|
||
|
|
// Bigger the version type number, higher priority it is
|
||
|
|
versionTypeAlpha versionType = iota
|
||
|
|
versionTypeBeta
|
||
|
|
versionTypeGA
|
||
|
|
)
|
||
|
|
|
||
|
|
var kubeVersionRegex = regexp.MustCompile("^v([\\d]+)(?:(alpha|beta)([\\d]+))?$")
|
||
|
|
|
||
|
|
func parseKubeVersion(v string) (majorVersion int, vType versionType, minorVersion int, ok bool) {
|
||
|
|
var err error
|
||
|
|
submatches := kubeVersionRegex.FindStringSubmatch(v)
|
||
|
|
if len(submatches) != 4 {
|
||
|
|
return 0, 0, 0, false
|
||
|
|
}
|
||
|
|
switch submatches[2] {
|
||
|
|
case "alpha":
|
||
|
|
vType = versionTypeAlpha
|
||
|
|
case "beta":
|
||
|
|
vType = versionTypeBeta
|
||
|
|
case "":
|
||
|
|
vType = versionTypeGA
|
||
|
|
default:
|
||
|
|
return 0, 0, 0, false
|
||
|
|
}
|
||
|
|
if majorVersion, err = strconv.Atoi(submatches[1]); err != nil {
|
||
|
|
return 0, 0, 0, false
|
||
|
|
}
|
||
|
|
if vType != versionTypeGA {
|
||
|
|
if minorVersion, err = strconv.Atoi(submatches[3]); err != nil {
|
||
|
|
return 0, 0, 0, false
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return majorVersion, vType, minorVersion, true
|
||
|
|
}
|
||
|
|
|
||
|
|
// CompareKubeAwareVersionStrings compares two kube-like version strings.
|
||
|
|
// Kube-like version strings are starting with a v, followed by a major version, optional "alpha" or "beta" strings
|
||
|
|
// followed by a minor version (e.g. v1, v2beta1). Versions will be sorted based on GA/alpha/beta first and then major
|
||
|
|
// and minor versions. e.g. v2, v1, v1beta2, v1beta1, v1alpha1.
|
||
|
|
func CompareKubeAwareVersionStrings(v1, v2 string) int {
|
||
|
|
if v1 == v2 {
|
||
|
|
return 0
|
||
|
|
}
|
||
|
|
v1major, v1type, v1minor, ok1 := parseKubeVersion(v1)
|
||
|
|
v2major, v2type, v2minor, ok2 := parseKubeVersion(v2)
|
||
|
|
switch {
|
||
|
|
case !ok1 && !ok2:
|
||
|
|
return strings.Compare(v2, v1)
|
||
|
|
case !ok1 && ok2:
|
||
|
|
return -1
|
||
|
|
case ok1 && !ok2:
|
||
|
|
return 1
|
||
|
|
}
|
||
|
|
if v1type != v2type {
|
||
|
|
return int(v1type) - int(v2type)
|
||
|
|
}
|
||
|
|
if v1major != v2major {
|
||
|
|
return v1major - v2major
|
||
|
|
}
|
||
|
|
return v1minor - v2minor
|
||
|
|
}
|