for b in $(find /mnt/save -not -path '*/\.*' -type f | sort -r); do
   if [ -n "$b" ]; then
      du -sh "$b"
      if ! du -sh "$b" | grep -Ei "^[ \t]*[0-9][0-9]?(.0)?[mg]"; then
         echo would rm empty backup $b >&2
         set -x
         mv "$b" "${b%/*}/.${b##*/}"
         set +x
         continue
      fi
      echo restoring $b >&2
      if psql $DATABASE_URL < "$b"; then
         break
      fi
   fi
done
service postgresql start