etc_cron.weekly_apt-show-upgradeable

#! /bin/sh
#
# Copyright (c) 2020, 2023 NVI, Inc.
#
# This file is part of FSL11 Linux distribution.
# (see http://github.com/nvi-inc/fsl11).
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#

#
# cron script to display all upgradeable packages using apt-listchanges
# (designed to replace the APT::Periodic::Unattended-Upgrade mechanism)
#
# - passes through all command line arguments to the underlying apt-listchanges command
#
# Written by Jonathan Quick <jon@hartrao.ac.za>.

export PATH=$PATH:/sbin:/usr/sbin:/usr/local/sbin

apt-get -qq update

PACKAGES=$(for file in `unattended-upgrade -v --dry-run 2>&1 | grep "^Packages that will be upgraded: " | cut -c33-`; do echo -n "/var/cache/apt/archives/$file*.deb "; done)

if [ -n "$PACKAGES" ]; then
	echo "Suggested Debian (Security?) Updates are:"
	echo
	apt-listchanges $@ $PACKAGES
	echo "To install these upgrades run (as root)"
	echo
	echo "        apt upgrade     (and 'y' to confirm as needed)"
	echo "        apt clean"
	if echo $PACKAGES | grep -q linux-image-; then
		echo
		echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! WARNING !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
		echo "NB: The Linux kernel image is one of the packages due to be upgraded."
		VERS=$(cat /proc/version | cut -d' ' -f3)
		if echo $PACKAGES | grep -q linux-image-$VERS; then
			echo "NB: (Upgrading will OVERWRITE the running kernel and require you to REBOOT!)"
		else
			echo "NB: (The kernal ABI has changed as per the linux-latest source package above"
			echo "NB:  so all out-of-tree modules WILL NEED TO BE REBUILT after you REBOOT.)"
		fi
		echo "NB: Please allow _extra time_ for TESTING after the upgrade."
		echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
	fi
fi