Dockerfile.distroless

#
# Dockerfile for JMurmel w/o X11 graphics
#
# Will build a docker image from a local clone of https://github.com/mayerrobert/jmurmel.git
# The resulting docker image should be a lot smaller than when using "Dockerfile".
# Needs docker or podman and a local git repo containing the jmurmel files.
# A local Java- or maven installation is not needed.
#
# Do something like
#
#    $ git clone https://github.com/mayerrobert/jmurmel.git
#    $ cd jmurmel
#
# and then:
#
# Usage:
#
#    $ podman build -t jmurmel-dl -f ./Dockerfile.distroless
#    $ podman run -it --rm jmurmel-dl
#
# The "podman build..." command will build a docker image from the local jmurmel git repo.
# The "podman run..." command will launch an interactive REPL session.
#
# You may want to mount your current working directory into the container so that JMurmel
# will "see" your local files:
#
#    $ podman run -it --rm -v .:/work -w /work jmurmel-dl
#
# The above command will make the current working directory available as "/work"
# inside the container and cd to it before launching JMurmel.
#
#
# Optional: after the build command some docker images could be deleted
# unless you want to keep them around to rebuild again and/ or use them for other purposes:
#
#    $ podman rmi maven:3.9.5-amazoncorretto-21-debian-bookworm
#
# maybe followed by
#
#    $ podman image prune
#
# Hint: if you used "base-debian12:debug" then you can use
#
#    $ podman run -it --rm --entrypoint=sh jmurmel-dl
#
# if you want to check what's inside the container.
#


FROM maven:3-amazoncorretto-23-debian-bookworm AS builder
# binutils are needed for "jlink ... --strip-debug". Saves 4MB in the final image.
RUN apt-get update && apt-get install -y --no-install-recommends binutils && rm -rf /var/lib/apt/lists/*

WORKDIR /jmurmel
COPY . .
RUN mvn -B package -f lambda/pom.xml -DskipTests && \
    jlink --output jdkbuild/jdk --compress=zip-6 --no-header-files --no-man-pages --strip-debug --add-modules java.base,jdk.compiler,jdk.zipfs,jdk.jfr,jdk.localedata,java.management



# see https://github.com/GoogleContainerTools/distroless
#FROM gcr.io/distroless/base-debian12:debug
FROM gcr.io/distroless/base-debian12

ARG CHIPSET_ARCH=x86_64-linux-gnu

COPY --from=builder /lib/${CHIPSET_ARCH}/libz.so.1 /lib/${CHIPSET_ARCH}/
COPY --from=builder /jmurmel/jdkbuild /jmurmel/lambda/target/jmurmel.jar /jmurmel/samples.murmel-mlib/mlib.lisp /jmurmel/

WORKDIR /jmurmel

# might want to add Java heap options e.g. -Xms500m -Xmx4G
ENTRYPOINT [ "/jmurmel/jdk/bin/java", "-Xss2m", "-XX:+UseParallelGC", "-jar", "/jmurmel/jmurmel.jar" ]