build.xml

<project name="editorconfig plugin" default="build">
    <property name="project.home" value="${basedir}"/>
    <property name="out.dir" value="${project.home}/out"/>
    <property name="core.dir" value="${project.home}/../editorconfig-core-java"/>
    <property name="idea.jar" value="${project.home}/idea.jar"/>

    <target name="clean">
        <delete dir="${out.dir}/classes" failonerror="false"/>
        <delete dir="${out.dir}/zip" failonerror="false"/>
    </target>

    <target name="build-core">
        <ant antfile="${core.dir}/build.xml" target="build" dir="${core.dir}"/>
        <copy file="${core.dir}/lib/editorconfig-core-java.jar" todir="${out.dir}/zip/editorconfig-jetbrains/lib/" />
    </target>

    <target name="build" depends="clean,build-core">
        <mkdir dir="${out.dir}/classes"/>
        <mkdir dir="${out.dir}/zip/editorconfig-jetbrains/lib"/>

        <javac srcdir="${project.home}/src" destdir="${out.dir}/classes">
            <classpath>
                <pathelement location="${idea.jar}" />
                <pathelement location="${out.dir}/zip/editorconfig-jetbrains/lib/editorconfig-core-java.jar" />
            </classpath>
        </javac>
        <mkdir dir="${out.dir}/classes/META-INF"/>
        <copy todir="${out.dir}/classes/META-INF">
            <fileset file="${project.home}/META-INF/plugin.xml"/>
        </copy>
        <jar basedir="${out.dir}/classes" jarfile="${out.dir}/zip/editorconfig-jetbrains/lib/editorconfig-jetbrains.jar" />
        <zip file="${out.dir}/editorconfig-jetbrains.zip" basedir="${out.dir}/zip/"/>
    </target>
</project>