#!/bin/sh
set -e

# Source debconf library.
. /usr/share/debconf/confmodule

# In Debian, this should be upgrade from 3-to-5, but the following code
# and the upgrade-4-to-5.lua file come from upstream. So I keep it like
# this for uniformity. Also, the issue relies on the lack of support on
# systemd sockets since 5.x.
# upgrade-4-to-5
export UPG_DIR=/var/lib/knot-resolver/.upgrade-4-to-5
if [ -f ${UPG_DIR}/.unfinished ] ; then
       rm -f ${UPG_DIR}/.unfinished
       kresd -c /usr/lib/x86_64-linux-gnu/knot-resolver/upgrade-4-to-5.lua >/dev/null 2>/dev/null
       db_input high knot-resolver/upgrade-buster-to-bullseye || true
       db_go || true
       cat ${UPG_DIR}/kresd.conf.net 2>/dev/null
fi

if [ "$1" = "configure" ]; then
    adduser --quiet --system --group --no-create-home --home /var/cache/knot-resolver knot-resolver
fi

# Restart any running kresd instances if the root key is updated.
# Note: if knot-resolver upstream watches this file and reloads it
# upon a change, we can and should remove this trigger.
if [ "$1" = "triggered" ]; then
    if [ "$2" = "/usr/share/dns/root.key" ]; then
        # systemctl of the sub-services is the preferred method to restart
        deb-systemd-invoke try-restart 'kresd@*.service' || true
        # but if we are running sysvinit, we can try to restart that process anyway
        # (kresd.service is masked on systems that use systemd)
        invoke-rc.d kresd try-restart || true
    fi
fi

if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
    deb-systemd-invoke try-restart 'kresd@*.service' || true
    invoke-rc.d kresd try-restart || true
fi

# Automatically added by dh_installtmpfiles/13.15.3
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
	if [ -x "$(command -v systemd-tmpfiles)" ]; then
		systemd-tmpfiles ${DPKG_ROOT:+--root="$DPKG_ROOT"} --create knot-resolver.conf || true
	fi
fi
# End automatically added section
# Automatically added by dh_installinit/13.15.3
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
	if [ -x "/etc/init.d/kresd" ]; then
		update-rc.d kresd defaults >/dev/null || exit 1
	fi
fi
# End automatically added section
# Automatically added by dh_installsystemd/13.15.3
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
	# The following line should be removed in trixie or trixie+1
	deb-systemd-helper unmask 'kres-cache-gc.service' >/dev/null || true

	# was-enabled defaults to true, so new installations run enable.
	if deb-systemd-helper --quiet was-enabled 'kres-cache-gc.service'; then
		# Enables the unit on first installation, creates new
		# symlinks on upgrades if the unit file has changed.
		deb-systemd-helper enable 'kres-cache-gc.service' >/dev/null || true
	else
		# Update the statefile to add new symlinks (if any), which need to be
		# cleaned up on purge. Also remove old symlinks.
		deb-systemd-helper update-state 'kres-cache-gc.service' >/dev/null || true
	fi
fi
# End automatically added section
# Automatically added by dh_installsystemd/13.15.3
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
	# The following line should be removed in trixie or trixie+1
	deb-systemd-helper unmask 'kresd.target' >/dev/null || true

	# was-enabled defaults to true, so new installations run enable.
	if deb-systemd-helper --quiet was-enabled 'kresd.target'; then
		# Enables the unit on first installation, creates new
		# symlinks on upgrades if the unit file has changed.
		deb-systemd-helper enable 'kresd.target' >/dev/null || true
	else
		# Update the statefile to add new symlinks (if any), which need to be
		# cleaned up on purge. Also remove old symlinks.
		deb-systemd-helper update-state 'kresd.target' >/dev/null || true
	fi
fi
# End automatically added section
# Automatically added by dh_installsystemd/13.15.3
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
	if [ -d /run/systemd/system ]; then
		systemctl --system daemon-reload >/dev/null || true
		if [ -n "$2" ]; then
			_dh_action=restart
		else
			_dh_action=start
		fi
		deb-systemd-invoke $_dh_action 'kres-cache-gc.service' 'kresd.target' >/dev/null || true
	fi
fi
# End automatically added section