FROM registry:2

RUN apk --no-cache add findutils && \
    rm -rf /var/cache/apk/*

COPY entrypoint.sh /entrypoint.sh
COPY cleanup.sh /cleanup.sh
RUN chmod +x /*.sh
ENTRYPOINT [ "/entrypoint.sh" ]

#!/bin/sh

# cleanup: remember to enable init for docker run and docker-compose
(
    while true; do
        sleep 600
        /cleanup.sh
    done
) &

exec registry serve /etc/docker/registry/config.yml

#!/bin/sh

registry garbage-collect /etc/docker/registry/config.yml -m
find /var/lib/registry -empty -type d -delete
for d in /var/lib/registry/docker/registry/v2/repositories/*; do
    echo "Processing $d"
    if [ ! -d $d/_manifests ]; then
        echo "Will delete $d"
        rm -rf $d
    fi
done