Clean all Docker images older than 4 weeks

dk-clean.sh

oldContainers="$(docker ps -f "status=exited" | grep -E 'Exited \(.*\) [5-9] h|Exited \(.*\) \d\d h' | awk '{ print $1 }')"

echo -e -n "\nRemoving containers older than 4 hours"

if [ "$oldContainers" != "" ]; then
  echo ""
  docker rm $oldContainers
else
  echo "...none found."
fi

the_nones="$(docker images | grep "<none>" | awk '{ print $3, $4, $5 }')"

old="$(echo -e "$the_nones" | grep "months\|days")"

# echo -e "$the_nones" | grep -e "[2-9]\shour[s]\|week[s]"
greaterThanFourHours="$(echo -e "$the_nones" | grep -e "[5-9]\shour[s]\|\d\d\shours\|day[s]\|week[s]\|month[s]\|year[s]")"

removeList="$(echo -e "$old" | awk '{ print $1 }')"
removeList=$removeList"$(echo -e "$greaterThanFourHours" | awk '{ print $1 }')"

echo -e -n "Removing images older than 4 hours"
if [ "$removeList" != "" ]; then
  echo ""
  docker rmi $removeList
else
  echo "...none found."
fi

echo -e "Docker has been sanitized.\n"