#!/bin/bash
# Remove images BY NAME for apps that are no longer deployed. NEVER `docker image prune` and never
# `docker system prune`: a global cleanup on any Felhom host is forbidden, and the scratch guest is
# not an exception worth making. Every removal below names one exact reference and is skipped if any
# container still uses it.
cat <<'SCRIPT' | ssh -o ConnectTimeout=30 demo-hp 'cat > /tmp/rc.sh; pct push 9202 /tmp/rc.sh /tmp/rc.sh >/dev/null 2>&1; pct exec 9202 -- bash /tmp/rc.sh; rm -f /tmp/rc.sh' 2>/dev/null
set -u
echo "free before: $(df -h /var/lib/felhom | tail -1 | awk '{print $4}')"
INUSE=$(docker ps -a --format '{{.Image}}' | sort -u)
N=0
for i in $(docker images --format '{{.Repository}}:{{.Tag}}' | grep -v '<none>' | sort -u); do
  case "$i" in
    gitea.dooplex.hu/admin/felhom-controller:*|traefik:*|gtstef/filebrowser:*|registry:2|localhost:5000/drill/*) continue;;
  esac
  if echo "$INUSE" | grep -qxF "$i"; then continue; fi
  if docker rmi "$i" >/dev/null 2>&1; then echo "  removed $i"; N=$((N+1)); fi
done
echo "removed $N images BY NAME (no prune was run)"
echo "free after:  $(df -h /var/lib/felhom | tail -1 | awk '{print $4}')"
SCRIPT