FROM scratch AS base
ENV VERSION=1.2.2
ENV SRC_HASH=119b2fb462adef986483438377a13b2f42064a2a3a4161f24a0cca698a07ac8c
ENV SRC_FILE=build-${VERSION}.tar.gz
ENV SRC_SITE=https://files.pythonhosted.org/packages/source/b/build/${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/python . /
COPY --from=stagex/py-setuptools . /
COPY --from=stagex/openssl . /
COPY --from=stagex/py-installer . /
COPY --from=stagex/py-flit . /
COPY --from=stagex/py-gpep517 . /
COPY --from=stagex/py-wheel . /
COPY --from=stagex/py-distro . /
COPY --from=stagex/py-dateutil . /
COPY --from=stagex/zlib . /
RUN tar -xzf ${SRC_FILE}
WORKDIR /build-${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/. /