# Path where to work
IPXE_DIRPATH="/opt/ipxe"

# Create some directories
mkdir -p "${IPXE_DIRPATH}/"{ipxe_project,builder}

# Fetch iPXE source files
cd "${IPXE_DIRPATH}/ipxe_project"
git clone https://github.com/ipxe/ipxe.git .

# Create the Docker builder image
cd "${IPXE_DIRPATH}/builder"
cat > ./Dockerfile <<'EOT'
# Docker image to build ipxe files
#
# References:
# * https://ipxe.org/download

FROM debian:10.2

RUN \
    apt-get --assume-yes --quiet update && \
    apt-get --assume-yes --quiet --no-install-recommends install \
        binutils \
        build-essential \
        gcc \
        genisoimage \
        git \
        isolinux \
        liblzma-dev \
        make \
        mtools \
        perl \
        syslinux \
        syslinux-common \
        && \
    apt-get --assume-yes --quiet clean && \
    apt-get --assume-yes --quiet autoremove && \
    rm -rf /var/lib/apt/lists/* && \
    true # No-op command to avoid "Empty continuation line" warning

WORKDIR /ipxe_sources

VOLUME /ipxe_sources

CMD ["sh", "-c", "cd src && make"]
EOT

# Run it
docker build -t "my_ipxe_builder" .
docker run --rm -v "${IPXE_DIRPATH}/ipxe_project":/ipxe_sources my_ipxe_builder

# It will create the following files in ${IPXE_DIRPATH}/ipxe_project/src :
# * bin/ipxe.dsk
# * bin/ipxe.lkrn
# * bin/ipxe.iso
# * bin/ipxe.usb
# * bin/ipxe.pxe
# * bin/undionly.kpxe