FROM ubuntu:20.04 as downloader ARG jdk=16 ADD provision/jdk/java-${jdk}.sh provision/jdk/java-${jdk}.sh RUN provision/jdk/java-${jdk}.sh ARG lombokjar=lombok.jar ADD https://projectlombok.org/downloads/${lombokjar} /lombok.jar ARG ant=1.10.9 ADD provision/ant/ant-${ant}.sh provision/ant/ant-${ant}.sh RUN provision/ant/ant-${ant}.sh FROM ubuntu:20.04 COPY --from=downloader /usr/local/apache-ant/ /usr/local/apache-ant/ COPY --from=downloader /opt/jdk/ /opt/jdk/ RUN update-alternatives --install /usr/bin/java java /opt/jdk/bin/java 1000 && update-alternatives --install /usr/bin/javac javac /opt/jdk/bin/javac 1000 && update-alternatives --install /usr/bin/javadoc javadoc /opt/jdk/bin/javadoc 1000 && update-alternatives --install /usr/bin/javap javap /opt/jdk/bin/javap 1000 WORKDIR workspace ADD shared/ ./ ARG jdk=16 ADD ant/files/jdk-${jdk} ./ COPY --from=downloader /lombok.jar /workspace/classpath/lombok.jar COPY --from=downloader /lombok.jar /workspace/modules/lombok.jar ENV JDK_VERSION=${jdk} ENV JAVA_HOME=/opt/jdk ENV ANT_HOME=/usr/local/apache-ant/apache-ant ENV PATH="${JAVA_HOME}/bin:${ANT_HOME}/bin:${PATH}" ENTRYPOINT bash