Reclame space used up by Docker on macOS

docker-clean.sh

#!/usr/bin/env bash

echo "Removing unused containers ..."
docker ps --filter status=dead --filter status=exited -aq | xargs docker rm -v

echo
echo "Removing unused images ..."
docker images --no-trunc | grep '<none>' | awk '{ print $3 }' | xargs docker rmi

echo
echo "Removing unused volumes ..."
docker volume ls -qf dangling=true | xargs docker volume rm

: ${DOCKER_QCOW:="${HOME}/Library/Containers/com.docker.docker/Data/com.docker.driver.amd64-linux/Docker.qcow2"}
: ${DOCKER_QCOW_BACKUP:="${HOME}/Library/Containers/com.docker.docker/Data/com.docker.driver.amd64-linux/Docker.qcow2~"}
echo
echo "Rebuilding ${DOCKER_QCOW} ..."
$(du -hs ${DOCKER_QCOW} | awk '{ printf "%s -> ", $1 }' ) \
    && mv ${DOCKER_QCOW} ${DOCKER_QCOW_BACKUP} \
    && qemu-img convert -O qcow2 ${DOCKER_QCOW_BACKUP} ${DOCKER_QCOW} \
    && rm -f ${DOCKER_QCOW_BACKUP} \
    && $( du -hs ${DOCKER_QCOW} | awk '{ printf "%s", $1 }' )