build.xml

<project name="blokus_2021_client" basedir="." default="main">
    <property name="game_name" value="blokus_2021"/>
    <property name="build.dir" value="build"/>
    <property name="lib.dir" value="lib"/>

    <!-- Local properties -->
    <property name="src.dir" value="src"/>
    <property name="classes.dir" value="${build.dir}/bin"/>
    <property name="jar.dir" value="${build.dir}/jar"/>
    <property name="main-class" value="sc.player2021.Starter"/>

    <path id="classpath.libs">
        <fileset dir="${lib.dir}" includes="**/*.jar"/>
    </path>

    <path id="classpath.base">
        <path refid="classpath.libs"/>
        <pathelement location="${classes.dir}"/>
    </path>

    <pathconvert property="jar.classpath" pathsep="">
        <mapper>
            <chainedmapper>
                <!-- remove absolute path -->
                <flattenmapper/>
                <!-- add lib/ prefix -->
                <globmapper from="*" to="lib/* "/>
            </chainedmapper>
        </mapper>

        <path refid="classpath.libs"/>
    </pathconvert>

    <pathconvert property="base.classpath" pathsep=":">
        <path refid="classpath.base"/>
    </pathconvert>

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

    <target name="compile">
        <mkdir dir="${classes.dir}"/>
        <javac source="1.8"
               target="1.8"
               srcdir="${src.dir}"
               encoding="utf8"
               destdir="${classes.dir}"
               classpathref="classpath.base"
               debug="true"
               debuglevel="lines,vars,source"
               includeantruntime="false"/>
    </target>

    <target name="build-jar" depends="compile">
        <jar destfile="${jar.dir}/${ant.project.name}.jar"
             basedir="${classes.dir}">
            <manifest>
                <attribute name="Main-Class" value="${main-class}"/>
                <attribute name="Class-Path" value="${jar.classpath}"/>
            </manifest>
        </jar>
        <copy todir="${jar.dir}/lib" >
            <path refid="classpath.libs" />
        </copy>
        <copy file="src/logback.xml"
              tofile="${jar.dir}/logback.xml"/>
    </target>

    <target name="build" depends="build-jar" description="Build only"/>

    <target name="main" depends="clean, build" description="Clean and build"/>
</project>