1 /* 2 Copyright 2022 The Kubernetes Authors. 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 */ 16 17 package internal 18 19 import ( 20 "fmt" 21 22 "k8s.io/apimachinery/pkg/api/meta" 23 apimachineryvalidation "k8s.io/apimachinery/pkg/api/validation" 24 "k8s.io/apimachinery/pkg/runtime" 25 ) 26 27 // LastAppliedConfigAnnotation is the annotation used to store the previous 28 // configuration of a resource for use in a three way diff by UpdateApplyAnnotation. 29 // 30 // This is a copy of the corev1 annotation since we don't want to depend on the whole package. 31 const LastAppliedConfigAnnotation = "kubectl.kubernetes.io/last-applied-configuration" 32 33 // SetLastApplied sets the last-applied annotation the given value in 34 // the object. 35 func SetLastApplied(obj runtime.Object, value string) error { 36 accessor, err := meta.Accessor(obj) 37 if err != nil { 38 panic(fmt.Sprintf("couldn't get accessor: %v", err)) 39 } 40 var annotations = accessor.GetAnnotations() 41 if annotations == nil { 42 annotations = map[string]string{} 43 } 44 annotations[LastAppliedConfigAnnotation] = value 45 if err := apimachineryvalidation.ValidateAnnotationsSize(annotations); err != nil { 46 delete(annotations, LastAppliedConfigAnnotation) 47 } 48 accessor.SetAnnotations(annotations) 49 return nil 50 } 51