build.xml

<project name="Juice" default="main">

  <property name="src.dir" value="src"/>
  <property name="grammar.dir" value="grammar"/>
  <property name="build.dir" value="build"/>
  <property name="classes.dir" value="${build.dir}/classes"/>
  <property name="jar.dir" value="${build.dir}/jar"/>
  <property name="lib.dir" value="lib" />

  <property name="main-class" value="whitesquare.glslcross.glslcompiler.GLSLCompiler"/>

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

  <target name="clean">
    <delete dir="build" />
  </target>

  <target name="grammar">
    <java fork="true" jar="${lib.dir}/antlr-4.0-complete.jar">
      <arg value="-lib" />
      <arg value="${grammar.dir}" />
      <arg value="-package" />
      <arg value="whitesquare.glslcross.glslcompiler" />
      <arg value="grammar/GLSL.g4" />
    </java>
    <copy todir="${src.dir}/whitesquare/glslcross/glslcompiler">
      <fileset dir="${grammar.dir}">
        <include name="**/*.java" />
      </fileset>
    </copy>
  </target>

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

  <target name="jar" depends="compile">
      <mkdir dir="${jar.dir}"/>
      <jar destfile="${jar.dir}/${ant.project.name}.jar" basedir="${classes.dir}">
          <manifest>
              <attribute name="Main-Class" value="${main-class}"/>
          </manifest>
      </jar>
  </target>

  <target name="run" depends="jar">
    <java fork="true" classname="${main-class}">
      <classpath>
        <path refid="classpath" />
        <path location="${jar.dir}/${ant.project.name}.jar" />
      </classpath>
    </java>
  </target>

  <target name="main" depends="run" />
</project>