build.xml

<project name="extension-test" basedir="." default="jar"
    xmlns:unless="ant:unless" xmlns:if="ant:if">

  <property name="som.dir"     location="../../.."/>
  <property name="src.dir"     location="src"/>
  <property name="src_dep.dir" location="src-cp-dep"/>
  <property name="src_gen.dir" location="src_gen"/>
  <property name="lib.dir"     location="${som.dir}/libs" />
  <property name="bd.dir"      location="${lib.dir}/black-diamonds" />
  <property name="sdk.dir"     location="${lib.dir}/truffle/sdk" />
  <property name="truffle.dir" location="${lib.dir}/truffle/truffle" />
  <property name="sdk.build"   location="${sdk.dir}/mxbuild/dists/jdk1.8" />
  <property name="truffle.build" location="${truffle.dir}/mxbuild/dists/jdk1.8" />
  
  <property name="build.dir"   location="build"/>
  <property name="classes.dir" location="${build.dir}/classes"/>
  <property name="classes_dep.dir" location="${build.dir}/classes-dep"/>

  <property environment="env"/>

  <path id="project.classpath">
      <pathelement location="${classes.dir}" />
      <pathelement location="${classes_dep.dir}" />
      
      <pathelement location="${som.dir}/build/classes/" />
      <pathelement location="${bd.dir}/build/classes" />
      <pathelement location="${sdk.build}/graal-sdk.jar" />
      <pathelement location="${truffle.build}/truffle-api.jar" />
      <pathelement location="${truffle.build}/truffle-dsl-processor.jar" />
  </path>
    
  <condition property="is.atLeastJava9" value="true" else="false">
    <or>
      <matches string="${java.version}" pattern="^9"/>
      <matches string="${java.version}" pattern="^1[0-9]"/>
    </or>
  </condition>
  <echo>
      ant.java.version: ${ant.java.version}
      java.version:     ${java.version}
      is.atLeastJava9:  ${is.atLeastJava9}
  </echo>

  <target name="clean" description="Remove build directories and generated code">
      <delete dir="${build.dir}"/>
      <delete dir="${src_gen.dir}"/>
  </target>

  <target name="compile" description="Compile Extension Test JAR">
    <mkdir dir="${build.dir}"/>
    <mkdir dir="${classes.dir}" />
    <mkdir dir="${classes_dep.dir}" />
    <mkdir dir="${src_gen.dir}" />

    <javac includeantruntime="false" srcdir="${src_dep.dir}" destdir="${classes_dep.dir}" debug="true">
      <compilerarg line="-Xlint:all" />
      <compilerarg line="--release 8" if:true="${is.atLeastJava9}" />
    </javac>

    <javac includeantruntime="false" srcdir="${src.dir}" destdir="${classes.dir}" debug="true">
      <classpath refid="project.classpath" />
      <compilerarg line="-s ${src_gen.dir}" />
      <compilerarg line="-XDignore.symbol.file" />
      <compilerarg line="-Xlint:all" />
      <compilerarg line="--release 8" if:true="${is.atLeastJava9}" />
    </javac>
    <javac includeantruntime="false" srcdir="${src_gen.dir}" destdir="${classes.dir}" debug="true">
      <classpath refid="project.classpath" />
      <compilerarg line="-s ${src_gen.dir}" />
      <compilerarg line="-Xlint:all" />
      <compilerarg line="--release 8" if:true="${is.atLeastJava9}" />
    </javac>
    
    <!-- Register the extension class -->
    <propertyfile file="${classes.dir}/somns.extension" comment="Extension Configuration">
      <entry key="class" value="ext.Extension" />
    </propertyfile>
  </target>

  <target name="jar" depends="compile" description="Package as JAR">
    <jar destfile="${build.dir}/test-extension.jar" basedir="${classes.dir}">
      <manifest>
        <attribute name="Class-Path" value="extension-dep.jar" />
      </manifest>
    </jar>
    <jar destfile="${build.dir}/extension-dep.jar" basedir="${classes_dep.dir}">
    </jar>
  </target>

</project>