#!/usr/bin/env bash

MNT_ROOT="/mnt/newroot"
MNT_BASE="/mnt/root"

mkdir -v -p "$MNT_BASE" "$MNT_BASE"
mount -v /dev/vg0/root "${MNT_BASE}"

mkdir -v -p "${MNT_ROOT}/"{usr,root,home,var}
mkdir -v -p "${MNT_ROOT}/var/log"

mount -v /dev/vg0/roothome "${MNT_ROOT}/root"
mount -v /dev/vg0/home "${MNT_ROOT}/home"
mount -v /dev/vg0/usr "${MNT_ROOT}/usr"
mount -v /dev/vg0/logs "${MNT_ROOT}/var/log"

rsync -avxhHAX --progress "${MNT_BASE}/var/log/" "${MNT_ROOT}/var/log/"
rsync -avxhHAX --progress "${MNT_BASE}/"{root,home,usr} "${MNT_ROOT}/"

rm -rf "${MNT_BASE}/"{root,home,usr}/*
rm -rf "${MNT_BASE}/"var/log/*

echo "/dev/vg0/roothome    /root       ext4    defaults,errors=remount-ro    0 0" >> "${MNT_BASE}/etc/fstab"
echo "/dev/vg0/home        /home       ext4    defaults,errors=remount-ro    0 0" >> "${MNT_BASE}/etc/fstab"
echo "/dev/vg0/usr         /usr        btrfs   defaults,compress             0 0" >> "${MNT_BASE}/etc/fstab"
echo "/dev/vg0/logs        /var/log    btrfs   defaults,compress             0 0" >> "${MNT_BASE}/etc/fstab"