#!/bin/bash

drive=/mnt/4tb
dest=$drive/arch
examplefile=user/data/.true

while [ ! -e $dest/home/$examplefile ] || [ ! -e /home/$examplefile ]; do
    echo 'FAIL: not mounted?'
    read line
    mount $drive
done

# home.b0 -> home.b1 -> home.b2 -> home.b3 -> ... -> home.b$n -> delete

rsync "$@" -axAXhvi --delete --stats --link-dest ../home.b0  --exclude-from ~user/data/backup-exclude   /home/   $dest/home.bu/

n=8

echo Removing $dest/home.b$n/ ...
rm -r $dest/home.b$n/

for (( i=$n; i>=1; i-- )); do
  mv -iv $dest/home.b$(($i-1))/ $dest/home.b$i/
done

mv -iv $dest/home.bu/ $dest/home.b0/

rsync "$@" -axAXhvi --delete --stats   /boot /etc /usr /var   $dest   --exclude /var/lib/machines/ --exclude /var/lib/docker/ --exclude /var/cache/pacman/pkg/