#!/bin/bash
set -e

ours=.wb
theirs=.wb-orig

# Remove diversion of sshd_configs from wb-configs which
# was accidently left unattended

# These functions are taken from config-package-dev heplers
# with modifications which allow to remove diversions from
# other packages
wb_undisplace_unlink_symlink()
{
    file="$1"
    ourfile="$2"
    theirfile="$3"
    if [ ! -L "$file" ] || \
	[ "$(readlink "$file")" != "$(basename "$ourfile")" -a \
	  "$(readlink "$file")" != "$(basename "$theirfile")" ]; then
	echo "*** OMINOUS WARNING ***: $file is not linked to either $(basename "$ourfile") or $(basename "$theirfile")" >&2
    else
	rm -f "$file"
    fi
}

wb_undisplace_unlink_displace()
{
    file="$1"
    if [ ! -L "$file" ] && [ ! -e "$file" ]; then
    echo "Run dpkg-divert --remove..."
	dpkg-divert --remove --rename "$file"
    else
	echo "Not removing diversion of $file by $package" >&2
    fi
}

wb_undisplace_unlink()
{
    prefix=$1
    suffix=$2

    file=$prefix$suffix
    ourfile=$prefix$ours$suffix
    theirfile=$prefix$theirs$suffix

    wb_undisplace_unlink_symlink "$file" "$ourfile" "$theirfile"
    wb_undisplace_unlink_displace "$file"
}

wb_check_undisplace_unlink_from()
{
    prefix=$1
    suffix=$2
    from_package=$3
    from_version=$4

    file=$prefix$suffix
    ourfile=$prefix$ours$suffix
    theirfile=$prefix$theirs$suffix

    if LC_ALL=C dpkg-divert --list "$from_package" | \
	grep -xFq "diversion of $file to $theirfile by $from_package"; then
        echo "Picking up diversion of $file from $package to replace it with our one"
	    wb_undisplace_unlink "$prefix" "$suffix" "$from_package"
    fi
}

if [ "$1" = "upgrade" ] && dpkg --compare-versions "$2" "lt" "1.75.4"; then
    wb_check_undisplace_unlink_from /etc/ssh/sshd_config "" wb-configs "1.75.4"
fi

# if wb-configs is upgraded with newer mosquitto, schedule service restarts
# (will be handled in postinst)
if [ "$1" = "upgrade" ] && dpkg --compare-versions "$2" "lt" "3.0.0~~"; then
    echo "Scheduling services restart because of mosquitto upgrade"
    touch /var/lib/wirenboard/.mosquitto2-upgrade-restart-required
fi

deb-systemd-invoke stop watchdog

# divert /usr/bin/mosquitto_pub, /usr/bin/mosquitto_sub to use our wrapper scripts
# the same section is in postrm script
mosquitto_apps=("mosquitto_sub" "mosquitto_pub" "mosquitto_rr")
for file in "${mosquitto_apps[@]}"; do
    if [[ ! -e "/usr/bin/${file}.mosq" ]]; then
       dpkg-divert --package wb-configs --divert "/usr/bin/${file}.mosq" --rename "/usr/bin/${file}"
    fi
done

# Automatically added by dh_installdeb/13.3.4
dpkg-maintscript-helper rm_conffile /etc/kernel/postinst.d/zImage-uboot -- "$@"
dpkg-maintscript-helper rm_conffile /etc/init.d/wb-configs 1.76\~ -- "$@"
dpkg-maintscript-helper rm_conffile /etc/apt/sources.list.d/contactless.list 1.76\~ -- "$@"
dpkg-maintscript-helper rm_conffile /etc/apt/sources.list.d/wheezy-backports.list 1.76\~ -- "$@"
dpkg-maintscript-helper rm_conffile /etc/apt/sources.list.d/nodesource.list 3.30.1\~ -- "$@"
dpkg-maintscript-helper rm_conffile /etc/apt/preferences 1.78\~ -- "$@"
dpkg-maintscript-helper rm_conffile /etc/preferences 1.78\~ -- "$@"
dpkg-maintscript-helper rm_conffile /etc/mosquitto/conf.d/auth.conf 3.0.0\~ -- "$@"
dpkg-maintscript-helper rm_conffile /etc/mosquitto/conf.d/listeners.conf 3.0.0\~ -- "$@"
dpkg-maintscript-helper rm_conffile /etc/mosquitto/conf.d/bridge.conf 3.0.0\~ -- "$@"
dpkg-maintscript-helper rm_conffile /etc/mosquitto/conf.d/bridge.conf.example 3.0.0\~ -- "$@"
dpkg-maintscript-helper rm_conffile /etc/mosquitto/conf.d/30limits.conf 3.22.0\~ -- "$@"
dpkg-maintscript-helper rm_conffile /etc/ssl/openssl.cnf 3.22.1\~ -- "$@"
# End automatically added section