#!/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 "$MODULE_BUILD_DIR/etc/systemd/system"
	# This is ugly, as the command line arguments changed over time. Try to do the right thing (whatever that is)
	# Need to run dbus-uuidgen first?
	local UUIDGEN="# This line intentionally left blank"
	if files_contain "ExecStartPre.*uuidgen" "/lib/systemd/system/dbus.service" "/usr/lib/systemd/system/dbus.service"; then
		UUIDGEN=$(find "$MODULE_BUILD_DIR" -name dbus-uuidgen -executable | head -n 1)
		[ -z "$UUIDGEN" ] && perror "Could not determine dbus-uuidgen location"
		UUIDGEN="ExecStartPre=/${UUIDGEN#$MODULE_BUILD_DIR} --ensure"
	fi
	# Figure out daemon location
	local DAEMON=$(find "$MODULE_BUILD_DIR" -name dbus-daemon -executable | head -n 1)
	[ -z "$DAEMON" ] && perror "Could not determine dbus-daemon location"
	DAEMON="/${DAEMON#$MODULE_BUILD_DIR}"
	local DAEMON_ARGS=""
	# Daemon arguments
	if files_contain "dbus-daemon.*nopidfile" "/lib/systemd/system/dbus.service" "/usr/lib/systemd/system/dbus.service"; then
		DAEMON_ARGS+=" --nopidfile"
	fi
	if files_contain "dbus-daemon.*activation=systemd" "/lib/systemd/system/dbus.service" "/usr/lib/systemd/system/dbus.service"; then
		DAEMON_ARGS+=" --activation=systemd"
	fi
	if files_contain "dbus-daemon.*systemd-activation" "/lib/systemd/system/dbus.service" "/usr/lib/systemd/system/dbus.service"; then
		DAEMON_ARGS+=" --systemd-activation"
	fi
	# dbus-send location
	local SEND=$(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}"
	sed "s,%UUIDGEN%,$UUIDGEN,g;s,%DAEMON%,$DAEMON,g;s,%SEND%,$SEND,g;s,%DAEMON_ARGS%,$DAEMON_ARGS,g" "templates/dbus.service" \
		> "$MODULE_BUILD_DIR/etc/systemd/system/dbus.service" \
		|| perror "Could not generate $MODULE_BUILD_DIR/etc/systemd/system/dbus.service"
	# This is REQUIRED, otherwise the session daemon won't start (can be empty, but has to exist...)
	mkdir -p "${MODULE_BUILD_DIR}/etc/dbus-1/session.d"
}

post_copy() {
	:
}

files_contain () {
	[ $# -lt 2 ] && perror "files_contain needs at least 2 arguments (pattern, file)"
	local PATTERN="$1"
	shift
	local FILE
	for FILE in $@; do
		[ -e "$FILE" ] || continue
		grep -q "$PATTERN" "$FILE" && return 0 # Found
	done
	return 1
}