}
	return os.WriteFile(filepath.Join(dir, "hosts"), []byte(hosts), filePerms)
}

func isRevisioned(revision string) bool {
	return revision != "" && revision != "default"
}

func IstiodHost(ns string, revision string) string {
	istiod := "istiod"
	if isRevisioned(revision) {
		istiod = fmt.Sprintf("%s-%s", istiod, revision)
	}
	return fmt.Sprintf("%s.%s.svc", istiod, ns)
}