build.xml

<project name="minijava" default="compile" basedir=".">
  <property name="src" location="src/java" />
  <property name="build" location="classes" />
  <property name="lib" location="lib" />

  <target name="init">
    <mkdir dir="${build}" />
    <mkdir dir="${lib}" />
    <get src="http://github.com/downloads/KentBeck/junit/junit-4.8.1.jar"
         dest="${lib}/junit.jar" />
    <get src="https://javacc.dev.java.net/files/documents/17/138912/javacc-5.0.zip"
         dest="${lib}/javacc.zip" />
    <unzip src="${lib}/javacc.zip" dest="${lib}" />
    <delete file="${lib}/javacc.zip" />
  </target>

  <target name="compile" depends="init">
    <delete>
      <fileset dir="${src}/minijava/parser/jcc/" includes="*.java" />
    </delete>
    <javacc target="${src}/minijava/parser/jcc/MiniJavaParser.jj"
            outputdirectory="${src}/minijava/parser/jcc"
            javacchome="${lib}/javacc-5.0" />
    
    <javac srcdir="${src}" destdir="${build}" classpath="${lib}/junit.jar">
      <exclude name="**/interp/**" />
      <exclude name="**/test/**" />
    </javac>
  </target>
  
  <target name="clean">
    <delete dir="${build}" />
    <delete dir="${lib}/javacc-5.0" />
  </target>
</project>