build.xml

<?xml version="1.0" encoding="UTF-8"?>
<project name="warlords" basedir="." default="dist">

    <property name="common.src.dir" location="common/src"/>
    <property name="desktop.src.dir" location="desktop/src"/>
    <property name="data.dir" location="data"/>
    <property name="build.dir" location="build"/>
    <property name="dist.dir" location="dist"/>

    <target name="clean" description="Remove build directories">
        <delete dir="${build.dir}"/>
        <delete dir="${dist.dir}"/>
    </target>

    <target name="build" description="Compile the sources">
        <mkdir dir="${build.dir}"/>
        <javac destdir="${build.dir}" includeantruntime="false" source="21" target="21">
            <src path="${common.src.dir}"/>
            <src path="${desktop.src.dir}"/>
        </javac>
        <copy todir="${build.dir}">
            <fileset dir="${data.dir}"/>
        </copy>
    </target>

    <target name="dist" depends="build" description="Generate the distribution">
        <jar jarfile="${dist.dir}/${ant.project.name}.jar" basedir="${build.dir}">
            <manifest>
                <attribute name="Main-Class" value="com.def.warlords.desktop.Main"/>
            </manifest>
        </jar>
    </target>

    <target name="run" depends="dist" description="Run the application">
        <java jar="${dist.dir}/${ant.project.name}.jar" fork="true"/>
    </target>

</project>