FROM scratch AS base
ENV VERSION=2.6.4
ENV SRC_HASH=e87aae032bf07c26f85ac0ed3250998c37621d95f8bd748b31f15b33c45ee995
ENV SRC_FILE=flex-${VERSION}.tar.gz
ENV SRC_SITE=https://github.com/westes/flex/releases/download/v${VERSION}/${SRC_FILE}

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

FROM fetch AS build
COPY --from=stagex/busybox . /
COPY --from=stagex/perl . /
COPY --from=stagex/gcc . /
COPY --from=stagex/binutils . /
COPY --from=stagex/make . /
COPY --from=stagex/m4 . /
COPY --from=stagex/libtool . /
COPY --from=stagex/autoconf . /
COPY --from=stagex/automake . /
COPY --from=stagex/bison . /
COPY --from=stagex/gettext . /
COPY --from=stagex/musl . /
RUN tar -xzf ${SRC_FILE}
WORKDIR /flex-${VERSION}
RUN --network=none <<-EOF
	set -eux
	./autogen.sh
	./configure \
		--build=x86_64-unknown-linux-musl \
		--host=x86_64-unknown-linux-musl \
		--prefix=/usr \
		--bindir=/usr/bin \
		--mandir=/usr/share/man \
		--infodir=/usr/share/info
	make -j "$(nproc)" LDFLAGS=-static
EOF

FROM build AS install
RUN --network=none make DESTDIR=/rootfs install

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