FROM scratch as base
ENV VERSION=2.06
ENV SRC_HASH=23b64b4c741569f9426ed2e3d0e6780796fca081bee4c99f62aa3f53ae803f5f
ENV SRC_FILE=grub-${VERSION}.tar.gz
ENV SRC_SITE=https://mirrors.kernel.org/gnu/grub/${SRC_FILE}

FROM base as fetch
ADD --checksum=sha256:${SRC_HASH} ${SRC_SITE} ${SRC_FILE}

FROM fetch as build
COPY --from=stagex/busybox . /
COPY --from=stagex/bison . /
COPY --from=stagex/flex . /
COPY --from=stagex/gcc . /
COPY --from=stagex/binutils . /
COPY --from=stagex/make . /
COPY --from=stagex/musl . /
COPY --from=stagex/python . /
COPY --from=stagex/m4 . /
COPY --from=stagex/linux-headers . / 
RUN tar -xf ${SRC_FILE}
WORKDIR grub-${VERSION}
RUN --network=none <<-EOF
	set -eux
	./configure \
        --prefix=/usr
    make -j "$(nproc)" CFLAGS="-Wno-error"
EOF

FROM build as install
RUN make DESTDIR=/rootfs install
RUN find /rootfs -exec touch -hcd "@0" "{}" +
RUN ls -la .

FROM base as test
COPY --from=install /rootfs/. /
COPY --from=stagex/musl . /
COPY --from=stagex/busybox . /
RUN grub-install --version
RUN /bin/sh <<-EOF
	set -eux
    GRUB_VERSION=\$(echo | grub-install --version) 
	if [ "grub-install (GRUB) ${VERSION}" != "\$GRUB_VERSION" ]; then
	    echo "Expected grub version is \$VERSION, but got \$GRUB_VERSION"
	    exit 1
	fi
EOF

FROM stagex/filesystem as package
COPY --from=install /rootfs/. /