kubernetes/pkg/util/labels/labels.go

// Clones the given map and returns a new map with the given key and value added.
// Returns the given map, if labelKey is empty.
func CloneAndAddLabel(labels map[string]string, labelKey, labelValue string) map[string]string { … }

// CloneAndRemoveLabel clones the given map and returns a new map with the given key removed.
// Returns the given map, if labelKey is empty.
func CloneAndRemoveLabel(labels map[string]string, labelKey string) map[string]string { … }

// AddLabel returns a map with the given key and value added to the given map.
func AddLabel(labels map[string]string, labelKey, labelValue string) map[string]string { … }

// Clones the given selector and returns a new selector with the given key and value added.
// Returns the given selector, if labelKey is empty.
func CloneSelectorAndAddLabel(selector *metav1.LabelSelector, labelKey, labelValue string) *metav1.LabelSelector { … }

// AddLabelToSelector returns a selector with the given key and value added to the given selector's MatchLabels.
func AddLabelToSelector(selector *metav1.LabelSelector, labelKey, labelValue string) *metav1.LabelSelector { … }

// SelectorHasLabel checks if the given selector contains the given label key in its MatchLabels
func SelectorHasLabel(selector *metav1.LabelSelector, labelKey string) bool { … }