得到蚂蚁＆lt;变形＆GT;选择正常工作 [英] Getting the Ant <modified> selector to work properly

问题描述

我在ANT的目标，需要运行在一个给定文件的编译两次：一次调试，一旦进行生产。我只是想，如果源文件已更改为运行编译器，所以我成立了一个＆lt;变形＆GT; 选择。然而，因为我既需要调试和督促任务，对于一个给定修改的文件运行，我在更新属性设置为false在第一次运行。我沿着线的东西：

I have a target in ANT that needs to run a compiler on a given set of files twice: once for debug, once for production. I only want to run the compiler if the source file has changed, so I set up a <modified> selector. However, since I need both the debug and prod task to run for a given modified file, I set the update property to false on the first run. I have something along the lines of:

<!-- Do the debug build -->
<apply executable="compiler">
    <fileset dir="${js.src.dir}" includes="*.js">
        <!-- don't update the cache so the prod build below works -->
        <modified update="false" 
            seldirs="true"
            cache="propertyfile"
            algorithm="digest"
            comparator="equal">
          <param name="cache.cachefile" value="cache.properties"/>
          <param name="algorithm.algorithm" value="md5"/>
        </modified>
    </fileset>
    <args for debug build/>
</apply>
<!-- Do the production build -->
<apply executable="compiler">
    <fileset dir="${js.src.dir}" includes="*.js">
        <modified update="true" 
            seldirs="true"
            cache="propertyfile"
            algorithm="digest"
            comparator="equal">
          <param name="cache.cachefile" value="cache.properties"/>
          <param name="algorithm.algorithm" value="md5"/>
        </modified>
    </fileset>
    <args for prod build/>
</apply>

然而，这是行不通的。我的编译器第一次调用结束反正更新缓存，第二个呼叫会跳过。缺少什么我在这里？

However this is not working. My first call to the compiler ends up updating the cache anyway, and the second call gets skipped. What am I missing here?

更新：我解决此问题得到了通过使用＆LT;靠＆GT; 选择器代替，但仍好奇如何做到使用相同的＆lt;变形＆GT;

UPDATE: I got around the problem by using the <depend> selector instead, but still curious how to accomplish the same using <modified>

推荐答案

更​​新被打破，直到显然1.8.0：

update is broken until apparently 1.8.0:

https://issues.apache.org/bugzilla/show_bug.cgi？ ID = 32597

只花了5年时间解决！

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