#!/bin/bash

print_and_run() {
    local cmd="$*"
    printf '➜ %s\n' "$cmd"
    # pipefail applies to the subshell; change/remove if not desired
    bash -o pipefail -c "$cmd"
}


SHRUNK="/opt/vm_drive/shrunk"
LINKS="/opt/vm_drive/*.qcow2"
 ACTION="echo Would remove"   # default: dry-run

DRYRUN=0
if [[ "$1" == "--dry-run" ]]; then
    DRYRUN=1
    shift
fi

find "$SHRUNK" -maxdepth 1 -type f -printf '%f\n' \
    | grep -vxFf <(readlink -f $LINKS | xargs -n1 basename) \
    | while read -r f; do
        if (( DRYRUN )); then
          echo "Would remove: $SHRUNK/$f"
        else
          echo "Removing: $SHRUNK/$f"
          rm -v -- "$SHRUNK/$f"
        fi
      done