#!/bin/bash

DOCKER_ORG="couchdbdev"

# These are the images that are currently being used, so don't `docker rmi` them on cleanup.
KEEP_IMAGES=(
debian-buster-erlang-all
ppc64ledebian-buster-erlang-20.3.8.25-1
arm64v8debian-buster-erlang-20.3.8.25-1
centos-8-erlang-20.3.8.25-1
centos-7-erlang-20.3.8.25-1
centos-6-erlang-20.3.8.25-1
ubuntu-focal-erlang-20.3.8.25-1
ubuntu-bionic-erlang-20.3.8.25-1
ubuntu-xenial-erlang-20.3.8.25-1
debian-buster-erlang-20.3.8.25-1
debian-stretch-erlang-20.3.8.25-1
ppc64le-debian-buster-erlang-20.3.8.25-1
arm64v8-debian-buster-erlang-20.3.8.25-1
debian-stretch-erlang-19.3.6
centos-7-erlang-19.3.6
centos-6-erlang-19.3.6
)

# Base images are used for building old libmozjs, primarily.
BASE_IMAGES=(
aarch64-debian-stretch-base
arm64v8-debian-buster-base
centos-6-base
centos-7-base
centos-8-base
debian-buster-base
debian-jessie-base
debian-stretch-base
ppc64le-debian-buster-base
ubuntu-bionic-base
ubuntu-trusty-base
ubuntu-xenial-base
)
# These images layer in the rest of the CouchDB build chain, and 1 or more Erlang versions.
IMAGES=(
aarch64-debian-stretch-erlang-20.3.8.20
#arm64v8-debian-buster-erlang-20.3.8.22-1
#arm64v8-debian-buster-erlang-20.3.8.24-1
arm64v8-debian-buster-erlang-20.3.8.25-1
arm64v8-debian-stretch-erlang-20.3.8.22-1
centos-6-erlang-19.3.6
#centos-6-erlang-20.3.8.22-1
#centos-6-erlang-20.3.8.24-1
centos-6-erlang-20.3.8.25-1
centos-7-erlang-19.3.6
#centos-7-erlang-20.3.8.22-1
#centos-7-erlang-20.3.8.24-1
centos-7-erlang-20.3.8.25-1
#centos-8-erlang-20.3.8.22-1
#centos-8-erlang-20.3.8.24-1
centos-8-erlang-20.3.8.25-1
#debian-buster-erlang-20.3.8.22-1
#debian-buster-erlang-20.3.8.24-1
debian-buster-erlang-20.3.8.25-1
debian-buster-erlang-all
debian-jessie-erlang-17.5.3
debian-jessie-erlang-19.3.6
debian-stretch-erlang-19.3.6
#debian-stretch-erlang-20.3.8.22-1
#debian-stretch-erlang-20.3.8.24-1
debian-stretch-erlang-20.3.8.25-1
#ppc64le-debian-buster-erlang-20.3.8.24-1
ppc64le-debian-buster-erlang-20.3.8.25-1
#ppc64le-debian-stretch-erlang-20.3.8.20
#ppc64le-debian-stretch-erlang-20.3.8.22-1
ppc64le-debian-stretch-erlang-20.3.8.24-1
s390x-debian-buster-erlang-20.3.8.25-1
ubuntu-12.04-erlang-18.3
ubuntu-bionic-erlang-19.3.6
#ubuntu-bionic-erlang-20.3.8.22-1
#ubuntu-bionic-erlang-20.3.8.24-1
ubuntu-bionic-erlang-20.3.8.25-1
ubuntu-focal-erlang-20.3.8.25-1
ubuntu-trusty-erlang-19.3.6
ubuntu-trusty-erlang-default
ubuntu-xenial-erlang-19.3.6
#ubuntu-xenial-erlang-20.3.8.22-1
#ubuntu-xenial-erlang-20.3.8.24-1
ubuntu-xenial-erlang-20.3.8.25-1
)

if [ "$(date +%u)" -ne "1" ]; then
    LIST=( ${KEEP_IMAGES[*]})
else
    LIST=( ${IMAGES[*]} ${BASE_IMAGES[*]} )
fi

for image in ${LIST[*]}
do
    echo docker pull couchdbdev/${image}
    docker pull couchdbdev/${image}
    # We don't want to delete the current working set of images.
    if ! printf '%s\n' "${KEEP_IMAGES[@]}" | grep -q -P "^${image}$"; then
        echo docker rmi couchdbdev/$image
        docker rmi couchdbdev/$image
    fi
done

docker system prune -f