#!/bin/sh

DAEMON=git
DAEMON_BIN=git-daemon
PID_FILE=/var/run/$DAEMON.pid
. /etc/init.d/modlibrc

echoDone() { echo 'done.'; }
echoFailed() { echo 'failed.'; }
echoFailedAndExit() { echoFailed; [ -n "$1" ] && exit $1 || exit 1; }

config() {
	if ! echo "$GIT_NICELEVEL" | egrep -q "^(-20|-?1?[0-9])$" >/dev/null 2>&1; then
		echo -e "\nInvalid nice level ($GIT_NICELEVEL), nice level must be between -20 (the highest priority) and 19 (the lowest)."
		echoFailedAndExit
	fi

	if [ -z "$GIT_ROOT" ]; then
		echo -e "\nGit repository directory must not be empty."
		echoFailedAndExit
	fi

	if [ ! -d "$GIT_ROOT" ]; then
		echoFailed
		echo "The git repository ($GIT_ROOT) does not exist."
		echo "Create a new repository and/or change the path using freetz' webinterface."
		echo
		echo "To create a new git repository use the following commands:"
		echo "    mkdir -p /srv"
		echo "    git init --bare /srv/GITROOT"
		echo "    touch srv/GITROOT/git-daemon-export-ok"
		exit 1
	fi

	chown -R $GIT_USER:$GIT_GROUP "$GIT_ROOT"

	[ -e $PID_FILE ] || echo -n > $PID_FILE
	chown $GIT_USER:$GIT_GROUP $PID_FILE
}

start() {
	echo -n "Starting $DAEMON_LONG_NAME ... "

	config

	local OPTIONS="--detach --enable=receive-pack --pid-file=$PID_FILE"
	[ -n "$GIT_BINDADDRESS" ] && OPTIONS="$OPTIONS --listen=$GIT_BINDADDRESS"
	[ -n "$GIT_PORT" ] && OPTIONS="$OPTIONS --port=$GIT_PORT"

	start-stop-daemon -S -N "$GIT_NICELEVEL" -x /usr/bin/$DAEMON_BIN -c $GIT_USER:$GIT_GROUP -q -- $OPTIONS --base-path="$GIT_ROOT" || echoFailedAndExit

	sleep 1
	modlib_check_running && echoDone || echoFailedAndExit
}

case $1 in
	""|load)
		modlib_addgroup $GIT_GROUP
		modlib_adduser $GIT_USER -G $GIT_GROUP -s /bin/false -D -S -H -g "git account"

		modreg cgi 'git' 'Git'
		modreg daemon $DAEMON

		modlib_start $GIT_ENABLED
		;;
	unload)
		modunreg daemon $DAEMON
		modunreg cgi 'git'
		modlib_stop
		;;
	start)
		modlib_start
		;;
	stop)
		modlib_stop
		;;
	restart)
		modlib_restart
		;;
	status)
		modlib_status
		;;
	*)
		echo "Usage: $0 [load|unload|start|stop|restart|status]" 1>&2
		exit 1
		;;
esac

exit 0