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metadata.go
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metadata.go
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// Copyright 2021-present, StarRocks Inc.
//
// 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 resource_utils
import (
"strings"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
type Labels map[string]string
func (l Labels) Add(key, value string) {
l[key] = value
}
func (l Labels) AddLabel(label Labels) {
if label == nil {
return
}
for k, v := range label {
l[k] = v
}
}
type Annotations map[string]string
func (a Annotations) Add(key, value string) {
a[key] = value
}
func (a Annotations) AddAnnotation(annotation Annotations) {
for k, v := range annotation {
a[k] = v
}
}
// MergeMetadata takes labels and annotations from the old resource and merges
// them into the new resource. If a key is present in both resources, the new
// resource wins. It also copies the ResourceVersion from the old resource to
// the new resource to prevent update conflicts.
func MergeMetadata(newMeta *metav1.ObjectMeta, oldMeta metav1.ObjectMeta) {
newMeta.ResourceVersion = oldMeta.ResourceVersion
newMeta.SetFinalizers(MergeSlices(newMeta.Finalizers, oldMeta.Finalizers))
newMeta.SetLabels(mergeMaps(newMeta.Labels, oldMeta.Labels))
newMeta.SetAnnotations(mergeMaps(newMeta.Annotations, oldMeta.Annotations))
newMeta.OwnerReferences = mergeOwnerReferences(newMeta.OwnerReferences, oldMeta.OwnerReferences)
}
func MergeSlices(new []string, old []string) []string {
set := make(map[string]bool)
for _, s := range new {
set[s] = true
}
for _, os := range old {
if _, ok := set[os]; ok {
continue
}
new = append(new, os)
}
return new
}
func mergeMaps(newMap map[string]string, oldMap map[string]string) map[string]string {
return mergeMapsByPrefix(newMap, oldMap, "")
}
func mergeMapsByPrefix(from map[string]string, to map[string]string, prefix string) map[string]string {
if to == nil {
to = make(map[string]string)
}
if from == nil {
from = make(map[string]string)
}
for k, v := range from {
if strings.HasPrefix(k, prefix) {
to[k] = v
}
}
return to
}
func mergeOwnerReferences(new []metav1.OwnerReference, old []metav1.OwnerReference) []metav1.OwnerReference {
var references []metav1.OwnerReference
existing := make(map[metav1.OwnerReference]bool)
for _, ownerRef := range new {
existing[ownerRef] = true
references = append(references, ownerRef)
}
for _, ownerRef := range old {
if _, ok := existing[ownerRef]; !ok {
references = append(references, ownerRef)
}
}
return references
}
func GetInt32Pointer(v int32) *int32 {
return &v
}
func GetStringPointer(s string) *string {
return &s
}
func GetInt64ptr(n int64) *int64 {
return &n
}