#!/bin/sh
# Copyright 2019 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# Upgrades a Crostini container from Debian Stretch to Buster,
# expects to be run as root.

set -ex

# Use defaults for everything, we don't support answering prompts.
export DEBIAN_FRONTEND=noninteractive

# No longer need to backport GPU support packages.
rm -f /etc/apt/sources.list.d/cros-gpu.list \
           /etc/apt/preferences.d/cros-gpu.pref

# Make sure apt-keys are up to date. We don't use keyring.debian.org because it
# only serves debian-specific keys and that's not enough when we want the Google
# package signing key.
apt-key adv --refresh-keys --keyserver keyserver.ubuntu.com \
    EB4C1BFD4F042F6DDDCCEC917721F63BD38B4796

# The actual flip to buster.
sed -i 's/stretch/buster/g' /etc/apt/sources.list \
    /etc/apt/sources.list.d/cros.list

# Upgrade everything to Buster versions.
apt-get update -y
apt-get upgrade -y
apt-get dist-upgrade -y