FROM scratch as base
ENV VERSION=8.0.4
ENV SRC_HASH=b5f43ff6800669595193fd09891564ee9d1d7dcb196cab4b2506d53a2e1c95c7
ENV SRC_FILE=setuptools-scm-${VERSION}.tar.gz
ENV SRC_SITE=https://files.pythonhosted.org/packages/source/s/setuptools-scm/${SRC_FILE}

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

FROM fetch as build
COPY --from=stagex/busybox . /
COPY --from=stagex/musl . /
COPY --from=stagex/zlib . /
COPY --from=stagex/libffi . /
COPY --from=stagex/python . /
COPY --from=stagex/py-flit . /
COPY --from=stagex/py-wheel . /
COPY --from=stagex/py-setuptools . /
COPY --from=stagex/py-gpep517 . /
COPY --from=stagex/py-installer . /
RUN tar -xzf ${SRC_FILE}
WORKDIR setuptools-scm-${VERSION}/src
ENV SETUPTOOLS_SCM_PRETEND_VERSION=${VERSION}
RUN gpep517 build-wheel --wheel-dir .dist --output-fd 3 3>&1 >&2

FROM build as install
RUN --network=none <<-EOF
    set -eu
    python -m installer -d /rootfs .dist/*.whl
    find /rootfs | grep -E "(/__pycache__$|\.pyc$|\.pyo$)" | xargs rm -rf
EOF

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