检查与蚂蚁参考 [英] Checking a reference with ant

问题描述

有没有办法在蚂蚁检查具体REFID参考某处定义？

例如，我需要检查如下，使用前应my.ref定义。

 ＆LT; pathconvert财产=my.propREFID =my.ref＆GT;
...
＆LT; / pathconvert＆GT;
 

我需要做的是，因为在我的项目有它不是我的控制下（实际上，我不准，有时审视自己的内容）的一些构建脚本。

这些脚本都应该定义此引用。不幸的是，我不能指望这个基准是指由于某种原因。

所以，我需要检查，并做优雅错误处理或某些具体的行动。

有没有办法做到这一点？

更新：

我找到了正确的方法做我自己。
它可以用做 isreference 的 Condition元素任务。

例如：

 ＆lt;条件属性=my.ref.defined＆GT;
    ＆LT; isreference REFID =my.ref/＆GT;
＆LT; /条件＆gt;
＆LT;失败，除非=my.ref.defined消息=引用my.ref没有定义。/＆GT;
 

解决方案

您可以设置基础上的的参考的值，然后测试该属性。例如：

 ＆LT;属性名=my.prop值=$ {的toString：my.ref}/＆GT;
 

Is there any way to check in ant that a reference with specific refid is defined somewhere?

For example, I need to check that my.ref is defined before using it as follows.

<pathconvert property="my.prop" refid="my.ref">
...
</pathconvert>

I need to do it since in my project there are some build scripts which not under my control (actually, I am not allowed to examine their content sometimes).

These scripts are supposed to define this reference. Unfortunately, I can't count that this reference is defined due to some reason.

So, I need to check it and perform graceful error handling or some specific actions.

Is there any way to do it?

Update:

I found the correct way to do it myself. It can be done by using isreference element of the condition task.

For instance:

<condition property="my.ref.defined">
    <isreference refid="my.ref"/>
</condition>
<fail unless="my.ref.defined" message="Reference my.ref not defined."/>

解决方案

You can set a property based on the value of a reference, then test that property. For example:

<property name="my.prop" value="${toString:my.ref}" />

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