FROM alpine:3.17 as BUILD
RUN apk add --no-cache binutils maven openjdk17-jdk
WORKDIR /build
COPY pom.xml .
RUN mvn dependency:go-offline
COPY src/ /build/src/
RUN export BUILD_DIRECTORY="$(mvn help:evaluate -Dexpression='project.build.directory' -q -DforceStdout)" && \
    export BUILD_NAME="$(mvn help:evaluate -Dexpression='project.build.finalName' -q -DforceStdout)" && \
    mvn package && \
    mkdir unpacked && \
    cd unpacked && \
    unzip /build/target/${BUILD_NAME}.jar && \
    cd .. && \
    mkdir -p /build/unpacked/BOOT-INF/lib && \
    cp ${BUILD_DIRECTORY}/${BUILD_NAME}.lib/*.jar /build/unpacked/BOOT-INF/lib/ && \
    jdeps \
        --ignore-missing-deps \
        --print-module-deps \
        -q \
        --recursive \
        --multi-release 17 \
        --class-path="./unpacked/BOOT-INF/lib/*" \
        --module-path="./unpacked/BOOT-INF/lib/*" \
        ${BUILD_DIRECTORY}/${BUILD_NAME}.jar > ${BUILD_DIRECTORY}/deps.info && \
    jlink \
        --verbose \
        --add-modules $(cat ${BUILD_DIRECTORY}/deps.info) \
        --strip-debug \
        --no-man-pages \
        --no-header-files \
        --compress=2 \
        --output ./jre && \
    echo -e "#!/bin/sh\n" \
        "/opt/jre/bin/java -jar ${BUILD_NAME}.jar" \
        > ${BUILD_DIRECTORY}/run.sh && \
    chmod 700 ${BUILD_DIRECTORY}/run.sh
FROM alpine:3.17
COPY --from=BUILD /build/target/ /opt/target/
COPY --from=BUILD /build/jre /opt/jre
WORKDIR /opt/target
ENTRYPOINT ["./run.sh"]