#!/bin/bash -xe
set -o pipefail

# Enable additional sources
cat > "${root:?}"/etc/apt/sources.list << EOF
deb ${deb_mirror_url:?} ${codename:?} main contrib non-free non-free-firmware
deb ${deb_mirror_url:?} ${codename:?}-updates main contrib non-free non-free-firmware
deb ${deb_security_mirror_url:?} ${codename:?}-security main contrib non-free non-free-firmware
EOF

# update/upgrade system
chroot "${root:?}" apt-get update
chroot "${root:?}" apt-get upgrade --assume-yes