#!/bin/bash

fetch_source() {
	echo "Extracting from running system..."
}

build() {
	COPYLIST="list_dpkg_output"
	[ -e "${COPYLIST}" ] && rm "${COPYLIST}"

	list_packet_files >> "${COPYLIST}"
	tarcopy "$(cat "${COPYLIST}" | sort -u)" "${MODULE_BUILD_DIR}"

	# Generate systemd files
	mkdir -p "$MODULE_BUILD_DIR/etc/systemd/system/dbus.service.d"

	# This is REQUIRED, otherwise the session daemon won't start (can be empty, but has to exist...)
	mkdir -p "${MODULE_BUILD_DIR}/etc/dbus-1/session.d"

	# We will either find the service file or generate it,
	# thus we can already create the drop-in for uuidgen
	UUIDGEN=$(find "$MODULE_BUILD_DIR" -name dbus-uuidgen -executable | head -n 1)
	[ -z "$UUIDGEN" ] && perror "Could not determine dbus-uuidgen location"
	cat <<-EOF > "$MODULE_BUILD_DIR/etc/systemd/system/dbus.service.d/uuidgen.conf"
		[Service]
		ExecStartPre=/${UUIDGEN#$MODULE_BUILD_DIR} --ensure
	EOF

	# First check if there is a system dbus file and copy it if so
	declare -A found
	for unit_type in service socket; do
		for candidate in {,/usr}"/lib/systemd/system/dbus.${unit_type}"; do
			if [ -e "$candidate" ]; then
				cp -a "$candidate" "${MODULE_BUILD_DIR}/etc/systemd/system" \
					|| perror "Failed to copy '$found' to '$MODULE_BUILD_DIR'."
				found["$unit_type"]=oui
			fi
		done
	done

	# If not found, generate service file from the template
	if [ -z "${found["service"]}" ]; then
		# This is ugly, as the command line arguments changed over time. Try to do the right thing (whatever that is)
		# Find path for: dbus-daemon
		local DAEMON=$(find "$MODULE_BUILD_DIR" -name dbus-daemon -executable | head -n 1)
		[ -z "$DAEMON" ] && perror "Could not determine dbus-daemon location"
		DAEMON="/${DAEMON#$MODULE_BUILD_DIR}"

		# Find path for: dbus-send
		local SEND=$(find "$MODULE_BUILD_DIR" -name dbus-send -executable | head -n 1)
		[ -z "$SEND" ] && perror "Could not determine dbus-send location"
		SEND="/${SEND#$MODULE_BUILD_DIR}"

		# Fill in the template
		sed "s,%DAEMON%,$DAEMON,g;s,%SEND%,$SEND,g" "${MODULE_DIR}/templates/dbus.service" \
			> "$MODULE_BUILD_DIR/etc/systemd/system/dbus.service" \
			|| perror "Could not generate $MODULE_BUILD_DIR/etc/systemd/system/dbus.service"
	fi

	# Same for socket file
	if [ -z "${found["socket"]}" ]; then
		cp "${MODULE_DIR}/templates/dbus.socket" "$MODULE_BUILD_DIR/etc/systemd/system" \
			|| perror "Could not copy templates/dbus.socket to build dir."
	fi
}

post_copy() {
	:
}