FROM scratch as base
ARG ARCH=x86_64
ENV VERSION=3.11
ENV SRC_HASH=1db2aedde89d0dea42b16d9528f894c8d15dae4e190b59aecc78f5a951276eab
ENV SRC_FILE=grep-${VERSION}.tar.xz
ENV SRC_SITE=https://mirrors.kernel.org/gnu/grep/${SRC_FILE}

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

FROM fetch as build
COPY --from=busybox . /
COPY --from=binutils . /
COPY --from=musl . /
COPY --from=make . /
COPY --from=gcc . /
RUN tar -xf ${SRC_FILE}
WORKDIR grep-${VERSION}
RUN --network=none <<-EOF
	set -ex
	./configure \
		--build=${ARCH}-linux-musl \
		--host=${ARCH}-linux-musl \
		--target=${ARCH}-linux-musl \
		--prefix=/usr \
        --sysconfdir=/etc \
		--mandir=/usr/share/man \
        --infodir=/usr/share/info \
        --disable-nls
	make -j "$(nproc)"
EOF

FROM build as install
RUN --network=none make DESTDIR="/rootfs" install
RUN find /rootfs -exec touch -hcd "@0" "{}" +

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