cfg/bin/docker-clean

#!/bin/bash
set -euo pipefail

if [ -e "${HOME}/bin/script_framework.sh" ]; then
  source "${HOME}/bin/script_framework.sh"
else
  function step() { echo $@; }
fi

step "Removing containers created / exited >= ~1h ago..."
CONTAINERS=$(docker ps -a | awk '/(hours?|days?|weeks?|months?) ago\s+(Created|Exited)/{ print $1 }' | xargs)
[ -n "${CONTAINERS}" ] && docker rm ${CONTAINERS}

step "Untagging all images not used by containers..."
PS_OUTPUT=$(docker ps -a)
for img in $(docker images | awk '/^[a-z].*(hours?|days?|weeks?|months?) ago/{ print $1":"$2 }' | grep -v '<none>' | sort | uniq); do
  if ! (echo "${PS_OUTPUT}" | grep -q "\s${img}\s") && ! (echo "${PS_OUTPUT}" | grep -q "\s${img%:latest}\s"); then
    docker rmi --no-prune "${img}"
  fi
done

step "Removing dangling images..."
docker image prune -f