build.xml

<?xml version="1.0" encoding="UTF-8"?>
<project basedir="." default="build" name="jdiscript">
    <property name="build.src" value="${basedir}/src" />
    <property name="build.out" value="${basedir}/build" />
    <property name="build.classes" value="${build.out}/classes" />
    <property name="final.name" value="jdiscript" />

    <target name="init">
        <mkdir dir="${build.classes}" />
    </target>

    <target depends="init" name="build">
        <javac destdir="${build.classes}">
            <src path="${build.src}" />
        </javac>
    </target>

    <target name="jar" depends="build">
        <mkdir dir="${build.classes}/META-INF" />
        <jar jarfile="${build.out}/${final.name}.jar"
                basedir="${build.classes}" />
    </target>

    <target name="clean">
        <delete dir="${build.out}" />
    </target>
</project>