nonfree-cleaner (debian)

purge.sh

#!/usr/bin/bash
dpkg-query -W -f='${Section}\t${Package}\n' | grep ^non-free | sed "s/.*\t//g" | xargs apt purge -y
pkg=""
set -e
export LANG=C
apt-cache policy $(apt list --installed | sed "s/\/.*//g") | while read line ; do
    if echo "$line" | grep "^[a-zA-Z0-9-]*:$" >/dev/null  ; then
        pkg=$(echo $line | sed "s/://g")
    elif echo $line | grep "non-free" >/dev/null ; then
        echo $pkg
    fi
done | uniq | xargs apt purge -y
sed -i "s/non-free-firmware//g;s/non-free//g" /etc/apt/sources.list