Question

Let’s say I have an xml file with this part:

<tag name="key" value="${tag.val}"/>

This xml file is part of a project which is built with ant. Is it possible to inject some concrete value during the build process?

I want to have something like this in the built output:

<tag name="key" value="realvalue"/>

Answer 1

Yes, using a filterset:

<copy args="tocopy" task="here">
    <filterset begintoken="$${" endtoken="}">
        <filter token="tag.val" value="realvalue"/>
    </filterset>
</copy>

You can also include a filtersfile as a property file which contains key/value pairs.

Of course, you also have the more simple option to source a properties file in your build file. Ant won’t yell at you if it does not exist, just make sure it exists when you invoke the build file…