admitv1 "k8s.io/api/admissionregistration/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/client-go/kubernetes"

	"istio.io/api/label"
	"istio.io/istio/istioctl/pkg/util"
)

func GetRevisionWebhooks(ctx context.Context, client kubernetes.Interface) ([]admitv1.MutatingWebhookConfiguration, error) {
	webhooks, err := client.AdmissionregistrationV1().MutatingWebhookConfigurations().List(ctx, metav1.ListOptions{

type uniqTag struct {
	revision, tag string
}

// listTags lists existing revision.
func listTags(ctx context.Context, kubeClient kubernetes.Interface, writer io.Writer) error {
	tagWebhooks, err := GetRevisionWebhooks(ctx, kubeClient)
	if err != nil {
		return fmt.Errorf("failed to retrieve revision tags: %v", err)
	}
	if len(tagWebhooks) == 0 {