set -euo pipefail

OLD_TRANSID=$(sudo btrfs subvolume find-new /mnt/root-blank 9999999)
OLD_TRANSID=${OLD_TRANSID#transid marker was }

sudo btrfs subvolume find-new "/mnt/root" "$OLD_TRANSID" |
    sed '$d' |
    cut -f17- -d' ' |
    sort |
    uniq |
    while read -r path; do
        path="/$path"
        if [ -L "$path" ]; then
            : # The path is a symbolic link, so is probably handled by NixOS already
        elif [ -d "$path" ]; then
            : # The path is a directory, ignore
        else
            echo "$path"
        fi
    done
