LabelSelector: fmt.Sprintf("%s=%s,!%s", label.IoIstioRev.Name, rev, IstioTagLabel),
	})
	if err != nil {
		return nil, err
	}
	return webhooks.Items, nil
}

// GetNamespacesWithTag retrieves all namespaces pointed at the given tag.
func GetNamespacesWithTag(ctx context.Context, client kubernetes.Interface, tag string) ([]string, error) {
	namespaces, err := client.CoreV1().Namespaces().List(ctx, metav1.ListOptions{

	}
	if len(webhooks) == 0 {
		return fmt.Errorf("cannot remove tag %q: cannot find MutatingWebhookConfiguration for tag", tagName)
	}

	taggedNamespaces, err := GetNamespacesWithTag(ctx, kubeClient, tagName)
	if err != nil {
		return fmt.Errorf("failed to retrieve namespaces dependent on tag %q", tagName)
	}
	// warn user if deleting a tag that still has namespaces pointed to it