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#!/bin/sh

set -e

_adopt_conffile() {
    conffile=$1
    pkg=$2

    [ -f "${conffile}.dpkg-bak" ] || return 0

    md5sum="$(md5sum "${conffile}" | sed -e 's/ .*//')"
    old_md5sum="$(dpkg-query -W -f='${Conffiles}' "$pkg" | \
                        sed -n -e "\' ${conffile} ' { s/ obsolete$//; s/.* //; p }")"
    # On new installs, if the policy file was preserved on systemd upgrade
    # by dpkg-maintscript helper, copy it back if the new file has not been modified yet
    if [ "$md5sum" = "$old_md5sum" ]; then
        mv "${conffile}.dpkg-bak" "${conffile}"
    fi
}


if [ "$1" = configure ] && [ -z "$2" ]; then
    _adopt_conffile "${DPKG_ROOT}/etc/systemd/resolved.conf" systemd-resolved
fi

if [ "$1" = configure ] && dpkg --compare-versions "$2" lt 251.4-2; then
    if [ "$(readlink "${DPKG_ROOT}/etc/resolv.conf")" != "../run/systemd/resolve/stub-resolv.conf" ] && [ "$(readlink "${DPKG_ROOT}/etc/resolv.conf")" != "/run/systemd/resolve/stub-resolv.conf" ]; then
        echo "Converting /etc/resolv.conf to a symlink to /run/systemd/resolve/stub-resolv.conf..."
        mkdir -p "${DPKG_ROOT}/run/systemd/resolve"
        if [ -f "${DPKG_ROOT}/etc/resolv.conf" ]; then
            cp "${DPKG_ROOT}/etc/resolv.conf" "${DPKG_ROOT}/run/systemd/resolve/stub-resolv.conf" || echo "Cannot copy /etc/resolv.conf to /run/systemd/resolve/stub-resolv.conf"
            mv "${DPKG_ROOT}/etc/resolv.conf" "${DPKG_ROOT}/etc/.resolv.conf.systemd-resolved.bak" || echo "Cannot take a backup of /etc/resolv.conf."
        fi
        ln -sf ../run/systemd/resolve/stub-resolv.conf "${DPKG_ROOT}/etc/resolv.conf" || echo "Cannot install symlink from /etc/resolv.conf to ../run/systemd/resolve/stub-resolv.conf"
    fi
fi

# Automatically added by dh_installsysusers/13.14.1ubuntu5
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
   systemd-sysusers ${DPKG_ROOT:+--root="$DPKG_ROOT"} systemd-resolve.conf
fi
# End automatically added section
# Automatically added by dh_installtmpfiles/13.14.1ubuntu5
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 systemd-resolve.conf || true
	fi
fi
# End automatically added section
# Automatically added by dh_installsystemd/13.14.1ubuntu5
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 'systemd-resolved.service' >/dev/null || true

	# was-enabled defaults to true, so new installations run enable.
	if deb-systemd-helper --quiet was-enabled 'systemd-resolved.service'; then
		# Enables the unit on first installation, creates new
		# symlinks on upgrades if the unit file has changed.
		deb-systemd-helper enable 'systemd-resolved.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 'systemd-resolved.service' >/dev/null || true
	fi
fi
# End automatically added section
# Automatically added by dh_installsystemd/13.14.1ubuntu5
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 'systemd-resolved.service' >/dev/null || true
	fi
fi
# End automatically added section