Grails外部配置Config System.getenv

Question

我在config.groovy中有代码

def ENV_NAME = "/home/myFolder"

if(System.getenv("ENV_NAME")) {
    println( "Including configuration file: " + System.getenv("ENV_NAME"));
    grails.config.locations << "file:" + System.getenv("ENV_NAME")
} else {
    println "No external configuration file defined."
}

当我运行时，结果是＆＃34;没有定义外部配置文件。＆＃34; 我想念的是什么？