#!/bin/sh

sudo modprobe zram num_devices=4
echo 1G | sudo tee /sys/block/zram0/disksize
sudo mkfs.ext4 -m0 /dev/zram0
mkdir /tmp/sys
sudo mount /dev/zram0 /tmp/sys
sudo tar -cpSf - \
    --acls --xattrs --selinux \
    --exclude '/dev/*' \
    --exclude '/run/*' \
    --exclude '/sys/*' \
    --exclude '/proc/*' \
    --exclude '/tmp/*' \
    --exclude '/var/tmp/*' \
    --exclude '/var/lib/apt/*' \
    --exclude '/var/lib/dpkg/*' \
    --exclude '/var/run/*' \
    --exclude '/boot/*' \
    / |
    sudo tar -xvf - \
        --acls --xattrs --selinux \
        -C /tmp/sys
sudo truncate -s0 /tmp/sys/etc/fstab
sudo swapoff -a
sudo mkdir /sysroot
sudo mount --rbind /tmp/sys /sysroot
sudo touch /etc/initrd-release