Creating a bundle jar with ant

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I'm using Ant to build some Java projects.
In some, I've got a lib/ directory, which contains external dependencies, in the form on JAR files.

During the build, I create a bundled jar, that contains the project's code, alongside the dependencies, by adding to the bundle jar file a zipfileset for each of the jars in the lib/ directory.

The problem is, that every time I add a jar, or change names, I need to remember to update the build.xml file, as I couldn't find a way for adding those zipfilesets in an automatic manner that will include all jars in a certain pattern (e.g. lib/*.jar).

Is there a better way for doing this?

I've considered writing my own Ant Task for this, or using Groovy's ant API to do this programmatically, but was wondering if there's a way for doing this using "vanilla" ant.

ant jar java
4 Answers

For those of you using NetBeans here is how you can create JAR archive with libraries bundled using zipgroupfileset:

<target name="-post-jar">

    <property name="store.jar.name" value="MyJarName"/>

    <property name="store.dir" value="dist"/>
    <property name="store.jar" value="${store.dir}/${store.jar.name}.jar"/>

    <echo message="Packaging ${application.title} into a single JAR at ${store.jar}"/>

    <jar destfile="${store.dir}/temp_final.jar" filesetmanifest="skip">
        <zipgroupfileset dir="dist" includes="*.jar"/>
        <zipgroupfileset dir="dist/lib" includes="*.jar"/>

        <manifest>
            <attribute name="Main-Class" value="${main.class}"/>
        </manifest>
    </jar>

    <zip destfile="${store.jar}">
        <zipfileset src="${store.dir}/temp_final.jar"
        excludes="META-INF/*.SF, META-INF/*.DSA, META-INF/*.RSA"/>
    </zip>

    <delete file="${store.dir}/temp_final.jar"/>
    <delete dir="${store.dir}/lib"/>
    <delete file="${store.dir}/README.TXT"/>
</target>

I've added this target definition to the end of build.xml file. Target name is -post-jar.

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