通过命令行参数更改默认的Ant目标 [英] Change default ant target by command line argument

问题描述

我最近指派任务，使蚂蚁能够建立战争包不同的环境。我几乎除了一个功能完成。

蚂蚁由像 -Denv = DEV 接受一个 ENV 参数，并使用不同的配置文件，以使war包。但是，默认目标为启动将构建，部署和启动Tomcat。我不想蚂蚁当我通过在 -Denv = PROD ARG部署战争既不启动服务器。我只想蚂蚁构建ROOT.war。这是不够的。

我知道我可以只输入多了一个字来实现这一目标，但你知道我们都是懒惰。 ：D

有谁知道如何根据命令行参数更改默认的目标是什么？
我的要求如下：

1. 蚂蚁-Denv = DEV 将构建，部署和启动服务器


2. 蚂蚁-Denv = PROD 将只建造ROOT.war

解决方案

我建议你在所谓的DEV和PROD你的的build.xml 文件中定义目标然后调用Ant为：

 蚂蚁DEV
 

或

 蚂蚁PROD
 

如果你想坚持与您当前使用的系统属性来选择目标的方法，然后@克罗克的答案似乎是要走的路。 （但我没有看到任何的优势，这种做法虽然。）

I'm recently assigned a task to make ant be able to build war packages for different environments. I'm almost done except one feature.

The ant accepts an env parameter by like -Denv=DEV, and use different configuration files to make the war package. But the default target is start which will build, deploy and start the tomcat. I don't want ant to deploy the war neither start the server when I pass in the -Denv=PROD arg. I only want ant to build the ROOT.war. It's enough.

I know I can just type one more word to achieve this goal, but you know we are all lazy. :D

Does anyone know how to change the default target according to the command line argument? My requirements are as below:

1. ant -Denv=DEV will build, deploy, and start the server
2. ant -Denv=PROD will only build the ROOT.war

解决方案

I suggest that you define targets in your build.xml file called "DEV" and "PROD" and then invoke Ant as:

ant DEV

or

ant PROD

If you want to stick with your current approach of using a system property to select the target, then @krock's answer seems to be the way to go. (But I don't see any advantage in that approach though.)

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