build.xml

<project name="R4Intellij" default="plugin.zip">

    <!--dependencies-->
    <property name="dep.idea.lib.dir" value="${idea.home}/lib"/>

    <path id="dep.plugin.classpath">
        <fileset dir="${dep.idea.lib.dir}">
            <include name="annotations.jar"/>
            <include name="forms_rt.jar"/>
            <include name="app.jar"/>
            <include name="rt.jar"/>
            <include name="util.jar"/>
            <include name="util_rt.jar"/>
            <include name="winp-*.jar"/>
        </fileset>
    </path>

    <path id="dep.javac2.classpath">
        <fileset dir="${dep.idea.lib.dir}">
            <include name="javac2.jar"/>
            <include name="util.jar"/>
            <include name="util_rt.jar"/>
            <include name="asm-all.jar"/>
            <include name="jgoodies-forms.jar"/>
        </fileset>
    </path>

    <!--input-->
    <property name="in.meta-inf.dir" value="META-INF"/>

    <property name="in.sources.dir" value="src"/>
    <property name="in.generated.sources.dir" value="gen"/>

    <property name="in.resources.dir" value="resources"/>
    <property name="in.r-helpers.dir" value="r-helpers"/>

    <!--output-->
    <property name="out.dir" value="out/ant"/>

    <property name="out.classes.dir" value="${out.dir}/classes"/>
    <property name="out.jar.dir" value="${out.dir}/jar"/>
    <property name="out.zip.dir" value="${out.dir}/zip"/>

    <property name="out.jar" value="${out.jar.dir}/${ant.project.name}.jar"/>
    <property name="out.zip" value="${out.zip.dir}/${ant.project.name}.zip"/>

    <!--tasks-->
    <taskdef name="javac2" classname="com.intellij.ant.Javac2" classpathref="dep.javac2.classpath"/>

    <!-- kotlin support see https://kotlinlang.org/docs/reference/using-ant.html-->
    <typedef resource="org/jetbrains/kotlin/ant/antlib.xml" classpath="${kotlin.lib}/kotlin-ant.jar"/>


    <!--targets-->
    <target name="clean">
        <delete dir="${out.dir}"/>
    </target>

    <target name="init">
        <mkdir dir="${out.classes.dir}"/>
        <mkdir dir="${out.jar.dir}"/>
        <mkdir dir="${out.zip.dir}"/>
    </target>

    <target name="compile" depends="init">
        <javac2 srcdir="${in.sources.dir}:${in.generated.sources.dir}"
                destdir="${out.classes.dir}"
                classpathref="dep.plugin.classpath"
                source="1.8"
                target="1.8"
                debug="on"
                includeantruntime="false"
        >
            <withKotlin/>
        </javac2>
    </target>

    <target name="plugin.zip" depends="clean, compile"
            description="create plugin bundle for upload to jetbrains repository">
        <jar destfile="${out.jar}">
            <zipfileset dir="${out.classes.dir}"/>
            <!--<zipfileset dir="${in.resources.dir}/icons" prefix="icons"/>-->
            <!--<zipfileset dir="${in.resources.dir}/inspectionDescriptions" prefix="inspectionDescriptions"/>-->
            <zipfileset dir="${in.resources.dir}"/>
            <!--<zipfileset dir="resources/META-INF" prefix="${in.meta-inf.dir}"/>-->
        </jar>

        <zip destfile="${out.zip}">
            <zipfileset file="${out.jar}" prefix="${ant.project.name}/lib"/>
            <zipfileset dir="${in.r-helpers.dir}" prefix="${ant.project.name}"/>
        </zip>
    </target>


    <!-- todo still needed??-->
    <target name="include_helpers">
        <zip destfile="R4Intellij.zip" update="true">
            <zipfileset dir="${in.r-helpers.dir}" prefix="${ant.project.name}"/>
        </zip>
    </target>

</project>