rnewson commented on PR #48:
URL: https://github.com/apache/couchdb-ci/pull/48#issuecomment-1484132979
@nickva I guess I got bored, but for example;
```
ARG BASE
FROM ${BASE}
ARG ERLANG_VERSION=25
ARG ELIXIR_VERSION=1.13
ARG JAVA_VERSION=11
ARG MAVEN_VERSION=3
# Install Erlang
ENV ERLANG_HOME=/usr/local/lib/erlang
COPY --from="erlang:${ERLANG_VERSION}" "${ERLANG_HOME}" "${ERLANG_HOME}"
ENV PATH="${ERLANG_HOME}/bin:${PATH}"
# Install Elixir
ENV ELIXIR_HOME=/usr/local/lib/elixir
COPY --from="elixir:${ELIXIR_VERSION}-otp-${ERLANG_VERSION}"
"${ELIXIR_HOME}" "${ELIXIR_HOME}"
ENV PATH="${ELIXIR_HOME}/bin:${PATH}"
# Install Java
ENV JAVA_HOME=/opt/java/openjdk
COPY --from="eclipse-temurin:${JAVA_VERSION}" "${JAVA_HOME}" "${JAVA_HOME}"
ENV PATH="${JAVA_HOME}/bin:${PATH}"
# Install Maven
ENV MAVEN_HOME=/usr/share/maven
COPY --from="maven:${MAVEN_VERSION}-eclipse-temurin-${JAVA_VERSION}"
"${MAVEN_HOME}" "${MAVEN_HOME}"
ENV PATH="${MAVEN_HOME}/bin:${PATH}"
```
Would just need to be called with various `--build-arg="BASE=blah"` for all
the OS's and arch's we seem to use.
Obviously there isn't a similar trick for spidermonkey/icu/etc but the above
covers the four big dependencies and in, I think?, a really efficient way? we
just depend entirely on a previous docker image build effort from the upstream
maintainers.
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