mirror of https://github.com/k3s-io/k3s
125 lines
3.7 KiB
Go
125 lines
3.7 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package labels
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import (
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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)
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// Clones the given map and returns a new map with the given key and value added.
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// Returns the given map, if labelKey is empty.
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func CloneAndAddLabel(labels map[string]string, labelKey, labelValue string) map[string]string {
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if labelKey == "" {
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// Don't need to add a label.
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return labels
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}
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// Clone.
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newLabels := map[string]string{}
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for key, value := range labels {
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newLabels[key] = value
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}
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newLabels[labelKey] = labelValue
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return newLabels
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}
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// CloneAndRemoveLabel clones the given map and returns a new map with the given key removed.
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// Returns the given map, if labelKey is empty.
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func CloneAndRemoveLabel(labels map[string]string, labelKey string) map[string]string {
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if labelKey == "" {
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// Don't need to add a label.
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return labels
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}
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// Clone.
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newLabels := map[string]string{}
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for key, value := range labels {
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newLabels[key] = value
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}
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delete(newLabels, labelKey)
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return newLabels
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}
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// AddLabel returns a map with the given key and value added to the given map.
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func AddLabel(labels map[string]string, labelKey, labelValue string) map[string]string {
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if labelKey == "" {
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// Don't need to add a label.
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return labels
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}
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if labels == nil {
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labels = make(map[string]string)
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}
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labels[labelKey] = labelValue
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return labels
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}
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// Clones the given selector and returns a new selector with the given key and value added.
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// Returns the given selector, if labelKey is empty.
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func CloneSelectorAndAddLabel(selector *metav1.LabelSelector, labelKey, labelValue string) *metav1.LabelSelector {
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if labelKey == "" {
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// Don't need to add a label.
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return selector
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}
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// Clone.
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newSelector := new(metav1.LabelSelector)
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// TODO(madhusudancs): Check if you can use deepCopy_extensions_LabelSelector here.
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newSelector.MatchLabels = make(map[string]string)
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if selector.MatchLabels != nil {
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for key, val := range selector.MatchLabels {
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newSelector.MatchLabels[key] = val
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}
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}
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newSelector.MatchLabels[labelKey] = labelValue
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if selector.MatchExpressions != nil {
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newMExps := make([]metav1.LabelSelectorRequirement, len(selector.MatchExpressions))
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for i, me := range selector.MatchExpressions {
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newMExps[i].Key = me.Key
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newMExps[i].Operator = me.Operator
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if me.Values != nil {
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newMExps[i].Values = make([]string, len(me.Values))
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copy(newMExps[i].Values, me.Values)
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} else {
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newMExps[i].Values = nil
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}
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}
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newSelector.MatchExpressions = newMExps
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} else {
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newSelector.MatchExpressions = nil
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}
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return newSelector
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}
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// AddLabelToSelector returns a selector with the given key and value added to the given selector's MatchLabels.
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func AddLabelToSelector(selector *metav1.LabelSelector, labelKey, labelValue string) *metav1.LabelSelector {
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if labelKey == "" {
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// Don't need to add a label.
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return selector
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}
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if selector.MatchLabels == nil {
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selector.MatchLabels = make(map[string]string)
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}
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selector.MatchLabels[labelKey] = labelValue
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return selector
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}
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// SelectorHasLabel checks if the given selector contains the given label key in its MatchLabels
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func SelectorHasLabel(selector *metav1.LabelSelector, labelKey string) bool {
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return len(selector.MatchLabels[labelKey]) > 0
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}
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