forked from coreos/etcd-operator
/
version.go
54 lines (46 loc) · 1.5 KB
/
version.go
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// Copyright 2016 The etcd-operator 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 backup
import (
"fmt"
"strings"
"github.com/coreos/go-semver/semver"
)
var compatibilityMap = map[string]map[string]struct{}{
"3.0": {"2.3": struct{}{}, "3.0": struct{}{}},
"3.1": {"3.0": struct{}{}, "3.1": struct{}{}},
"3.2": {"3.1": struct{}{}, "3.2": struct{}{}},
}
func getMajorMinorVersionFromBackup(name string) (string, error) {
return getMajorAndMinorVersion(getVersionFromBackup(name))
}
func getVersionFromBackup(name string) string {
return strings.SplitN(name, "_", 2)[0]
}
func isVersionCompatible(req, serve string) bool {
compatVersions, ok := compatibilityMap[req]
if !ok {
return false
}
_, ok = compatVersions[serve]
return ok
}
// getMajorAndMinorVersion expects a semver and then returns "major.minor"
func getMajorAndMinorVersion(rawV string) (string, error) {
v, err := semver.NewVersion(rawV)
if err != nil {
return "", err
}
return fmt.Sprintf("%d.%d", v.Major, v.Minor), nil
}