#!/bin/sh

echo

# Remove "$NEWROOT"/.successful-update if exists
rm -f "$NEWROOT"/.successful-update "$NEWROOT"/.update

# Check if there is an available update
if [ -d "$NEWROOT"/.update_rootfs ]; then
    # Available, rename old /usr and move new /usr to /
    if [ -d "$NEWROOT"/.update_rootfs/usr ]; then
        rm -rf "$NEWROOT"/.old.usr
        mv "$NEWROOT"/usr "$NEWROOT"/.old.usr >/dev/null 2>&1
        mv "$NEWROOT"/.update_rootfs/usr "$NEWROOT"/usr
    fi

    # Same for /etc
    if [ -d "$NEWROOT"/.update_rootfs/etc ]; then
        rm -rf "$NEWROOT"/.old.etc
        mv "$NEWROOT"/etc "$NEWROOT"/.old.etc >/dev/null 2>&1
        mv "$NEWROOT"/.update_rootfs/etc "$NEWROOT"/etc
    fi

    # Same for /var
    if [ -d "$NEWROOT"/.update_rootfs/var ]; then
        rm -rf "$NEWROOT"/.old.var
        mv "$NEWROOT"/var "$NEWROOT"/.old.var >/dev/null 2>&1
        mv "$NEWROOT"/.update_rootfs/var "$NEWROOT"/var
    fi

    rm -rf "$NEWROOT"/.old.update_rootfs
    mv "$NEWROOT"/.update_rootfs "$NEWROOT"/.old.update_rootfs
    touch "$NEWROOT"/.successful-update
fi

mount -o ro,bind "$NEWROOT"/usr "$NEWROOT"/usr