ARG TAG=musl
FROM docker.io/gentoo/portage:latest as portage

# uefi stub in a separate builder
FROM docker.io/gentoo/stage3 as efistub
COPY --from=portage /var/db/repos/gentoo /var/db/repos/gentoo

# systemd-boot
RUN echo 'sys-apps/systemd-utils boot' > /etc/portage/package.use/systemd-utils && \
    emerge -qv sys-apps/systemd-utils

# kernel and its dependencies in a separate builder
FROM docker.io/gentoo/stage3:$TAG as kernel
COPY --from=portage /var/db/repos/gentoo /var/db/repos/gentoo
# disable initramfs generation, only need the kernel image itself
RUN echo 'sys-kernel/gentoo-kernel-bin -initramfs' > /etc/portage/package.use/kernel
RUN emerge -qv sys-kernel/gentoo-kernel-bin

FROM docker.io/gentoo/stage3:$TAG
COPY --from=portage /var/db/repos/gentoo /var/db/repos/gentoo
COPY --from=kernel /boot /boot
COPY --from=kernel /lib/modules /lib/modules
COPY --from=efistub /usr/lib/systemd/boot/efi /usr/lib/systemd/boot/efi
ARG TAG

MAINTAINER https://github.com/dracutdevs/dracut

# required by sys-fs/dmraid
RUN echo 'sys-fs/lvm2 lvm thin' > /etc/portage/package.use/lvm2

# workaround for https://bugs.gentoo.org/734022 whereby Gentoo does not support NFS4 with musl
RUN if [[ "$TAG" == 'musl' ]]; then echo 'net-fs/nfs-utils -nfsv4' > /etc/portage/package.use/nfs-utils ; fi

# workaround for packages do not compile on musl
# https://bugs.gentoo.org/713490 for tgt
# https://bugs.gentoo.org/908587 for open-iscsi
RUN if [[ "$TAG" != 'musl' ]]; then emerge -qv sys-block/tgt sys-block/open-iscsi ; fi

# Install needed packages for the dracut CI container
RUN emerge -qv \
    app-arch/cpio \
    app-emulation/qemu \
    app-shells/dash \
    net-fs/nfs-utils \
    net-misc/dhcp \
    sys-apps/busybox \
    sys-block/nbd \
    sys-block/parted \
    sys-fs/btrfs-progs \
    sys-fs/cryptsetup \
    sys-fs/dmraid \
    sys-fs/lvm2 \
    sys-fs/mdadm \
    sys-fs/multipath-tools \
    sys-fs/ntfs3g \
    sys-fs/squashfs-tools \
    && rm -rf /var/cache/* /usr/share/doc/* /usr/share/man/*