content: FROM quay.io/pypa/musllinux_1_2_aarch64:latest AS env
  # CMake 3.31.2 and SWIG 4.3.0 already installed
  
  # Install system build dependencies
  ENV PATH=/usr/local/bin:$PATH
  RUN apk add --no-cache git build-base linux-headers xfce4-dev-tools
  ENTRYPOINT ["/bin/sh", "-c"]
  CMD ["/bin/sh"]
  
  ## Python
  #RUN apk add --no-cache python3-dev py3-pip py3-wheel py3-virtualenv \
  # py3-numpy py3-pandas py3-matplotlib
  #RUN rm -f /usr/lib/python3.*/EXTERNALLY-MANAGED \
  #&& python3 -m pip install absl-py mypy mypy-protobuf
  
  ################
  ##  OR-TOOLS  ##
  ################
  FROM env AS devel
  ENV GIT_URL https://github.com/google/or-tools
  
  ARG GIT_BRANCH
  ENV GIT_BRANCH ${GIT_BRANCH:-main}
  ARG GIT_SHA1
  ENV GIT_SHA1 ${GIT_SHA1:-unknown}
  
  # Download sources
  # use GIT_SHA1 to modify the command
  # i.e. avoid docker reusing the cache when new commit is pushed
  RUN git clone -b "${GIT_BRANCH}" --single-branch "${GIT_URL}" /project \
  && cd /project \
  && git reset --hard "${GIT_SHA1}"
  WORKDIR /project
  
  # Copy build script and setup env
  ENV PLATFORM aarch64
  ARG PYTHON_VERSION
  ENV PYTHON_VERSION ${PYTHON_VERSION:-3}
  COPY build-musllinux.sh .
  RUN chmod a+x "build-musllinux.sh"
  
  FROM devel AS build
  RUN ./build-musllinux.sh build
  
  FROM build as test
  RUN ./build-musllinux.sh test
  