Imports ehang.io/nps/client ehang.io/nps/lib/common ehang.io/nps/lib/config ehang.io/nps/lib/file ehang.io/nps/lib/install ehang.io/nps/lib/version github.com/astaxie/beego/logs github.com/ccding/go-stun/stun github.com/kardianos/service Standard library imports flag fmt os os/exec runtime strings sync time