FROM scratch as base
ENV VERSION=3.12.0
ENV SRC_HASH=795c34f44df45a0e9b9710c8c71c15c671871524cd412ca14def212e8ccb155d
ENV SRC_FILE=Python-${VERSION}.tar.xz
ENV SRC_SITE=https://www.python.org/ftp/python/${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/gcc . /
COPY --from=stagex/binutils . /
COPY --from=stagex/make . /
COPY --from=stagex/musl . /
COPY --from=stagex/openssl . /
COPY --from=stagex/zlib . /
COPY --from=stagex/bzip2 . /
RUN tar -xf ${SRC_FILE}
WORKDIR Python-${VERSION}
ENV SOURCE_DATE_EPOCH=1
ENV PYTHONHASHSEED=0
ENV PYTHONDONTWRITEBYTECODE=1
RUN --network=none <<-EOF
	set -eux
	./configure \
		--prefix=/usr \
		--enable-shared \
		--with-computed-gotos \
		--without-ensurepip
	make -j "$(nproc)"
EOF

FROM build as install
RUN --network=none <<-EOF
	set -eux
	make DESTDIR=/rootfs install
	ln -s /usr/bin/python3 /rootfs/usr/bin/python
EOF
RUN find /rootfs -exec touch -hcd "@0" "{}" +

FROM scratch as test
COPY --from=install /rootfs/. /
COPY --from=stagex/musl . /
COPY <<-EOF test.py
	print("Success")
EOF
RUN python test.py | grep "Success"

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