blend/blend.hook

#!/bin/bash

run_latehook() {
    if [[ -f /new_root/blend/states/.load_prev_state ]] && compgen -G "/new_root/blend/states/state+([0-9]).tar.gz" >/dev/null; then
        rm -rf /new_root/blend/overlay/current
        mkdir -p /new_root/blend/overlay/current/usr
        c=0
        for i in $(compgen -G "/new_root/blend/states/state*.tar.gz"); do
            n="${i:19:-7}"
            if [[ "$n" -gt "$c" ]]; then
                c="$n"
            fi
        done
        tar -xvpzf "/new_root/blend/states/state${c}.tar.gz" -C "/new_root/blend/overlay/current/usr" --numeric-owner &>/dev/null
        rm -f "/new_root/blend/states/state${c}.tar.gz" "/new_root/blend/states/.load_prev_state"
    fi

    mkdir -p /new_root/blend/overlay/current/usr/bin \
             /new_root/blend/overlay/current/usr/sbin \
             /new_root/blend/overlay/current/usr/share

    mkdir -p /new_root/usr/bin \
             /new_root/usr/sbin \
             /new_root/usr/share
    rm -rf /new_root/blend/overlay/workdir_1 /new_root/blend/overlay/workdir_2 /new_root/blend/overlay/workdir_3
    mkdir -p /new_root/blend/overlay/workdir_1 /new_root/blend/overlay/workdir_2 /new_root/blend/overlay/workdir_3
    mount -t overlay overlay -o 'lowerdir=/new_root/usr/bin,upperdir=/new_root/blend/overlay/current/usr/bin,workdir=/new_root/blend/overlay/workdir_1' /new_root/usr/bin -o index=off
    mount -t overlay overlay -o 'lowerdir=/new_root/usr/sbin,upperdir=/new_root/blend/overlay/current/usr/sbin,workdir=/new_root/blend/overlay/workdir_2' /new_root/usr/sbin -o index=off
    mount -t overlay overlay -o 'lowerdir=/new_root/usr/share,upperdir=/new_root/blend/overlay/current/usr/share,workdir=/new_root/blend/overlay/workdir_3' /new_root/usr/share -o index=off
}