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

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

FROM fetch as build
COPY --from=busybox . /
COPY --from=bison . /
COPY --from=flex . /
COPY --from=gcc . /
COPY --from=binutils . /
COPY --from=make . /
COPY --from=musl . /
COPY --from=python . /
COPY --from=m4 . /
COPY --from=linux-headers . / 
RUN tar -xf ${SRC_FILE}
WORKDIR grub-${SRC_VERSION}
RUN --network=none <<-EOF
	set -eux
	./configure \
        --prefix=/usr
    make 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=musl . /
COPY --from=busybox . /
RUN grub-install --version
RUN /bin/sh <<-EOF
	set -eux
    GRUB_VERSION=\$(echo | grub-install --version) 
	if [ "grub-install (GRUB) ${SRC_VERSION}" != "\$GRUB_VERSION" ]; then
	    echo "Expected xorriso version is \$SRC_VERSION.pl02, but got \$XORRISO_VERSION"
	    exit 1
	fi
EOF

FROM scratch as package
COPY --from=install /rootfs /