FROM rockylinux:9

RUN set -eux ; \
    dnf upgrade -y ; \
    dnf -y install --nodocs --setopt=install_weak_deps=False \
        gcc \
        genisoimage \
        git \
        make \
        patch \
        syslinux \
        xz-devel \
        ; \
    dnf -y clean all ; \
    rm -rf /var/cache/dnf

RUN set -eux ; \
    useradd -c "iPXE Builder" -d /build -m build

WORKDIR /build
USER build

COPY --chmod=0644 config.patch embed.ipxe .

CMD set -eux ; \
    { \
        git clone https://github.com/ipxe/ipxe.git ; \
        cd ipxe/src ; \
        patch -p0 < /build/config.patch ; \
        make \
            bin/ipxe.iso bin/ipxe.usb bin/undionly.kpxe \
            bin-x86_64-efi/ipxe.iso bin-x86_64-efi/ipxe.usb \
            EMBEDDED_IMAGE=/build/embed.ipxe ; \
    } 1>&2 ; \
    tar cf - bin/ipxe.iso bin/ipxe.usb bin/undionly.kpxe \
             bin-x86_64-efi/ipxe.iso bin-x86_64-efi/ipxe.usb