func valueOrEnv(config map[string]string, key, env string) string {
	if v := config[key]; v != "" {
		return v
	}
	if v := os.Getenv(env); v != "" {
		logger.Printf("[DEBUG] Using value of %s for configuration of %s", env, key)
		return v
	}
	return ""
}
func valueOrEnv(config map[string]string, key, env string) string {
	if v := config[key]; v != "" {
		return v
	}
	if v := os.Getenv(env); v != "" {
		logger.Printf("[DEBUG] Using value of %s for configuration of %s", env, key)
		return v
	}
	return ""
}
func valueOrEnv ( config map [ string ] string , key , env string ) string { if v := config [ key ] ; v != " " { return v } if v := os . Getenv ( env ) ; v != " " { logger . Printf ( " " , env , key ) return v } return " " }
// valueOrEnv provides a way of suppling configuration values through
// environment variables. Defined values always take priority.
valueOrEnv provides a way of suppling configuration values through environment variables . Defined values always take priority .