FROM scratch AS base
ENV VERSION=15
ENV SRC_HASH=368fa8dfb0775589e3f85d34df18395c22980de8520dc6447e778fc1d0102787
ENV SRC_FILE=v${VERSION}.tar.gz
ENV SRC_SITE=https://github.com/projg2/gpep517/archive/v${VERSION}/${SRC_FILE}

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

FROM fetch AS install
COPY --from=stagex/busybox . /
COPY --from=stagex/musl . /
COPY --from=stagex/python . /
COPY --from=stagex/zlib . /
RUN tar -xzf ${SRC_FILE}
WORKDIR gpep517-${VERSION}
COPY <<-'EOF' gpep517-cli
#!/usr/bin/python3
# -*- coding: utf-8 -*-
import sys
from gpep517.__main__ import main
if __name__ == "__main__":
    sys.exit(main())
EOF
RUN --network=none <<-EOF
	set -eu
	sitedir="$(python3 -c 'import site;print(site.getsitepackages()[0])')"
	mkdir -p "/rootfs/${sitedir}"
	cp -a gpep517 "/rootfs/$sitedir"
	python3 -m compileall "/rootfs/$sitedir"
	install -Dm755 gpep517-cli /rootfs/usr/bin/gpep517
    find /rootfs | grep -E "(/__pycache__$|\.pyc$|\.pyo$)" | xargs rm -rf
EOF

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