type DaemonCommand struct {
	// "singleton" "fuse"
	Mode string `type:"subcommand"`
	// "blobcache" "fscache" "virtiofs"
	FscacheDriver  string `type:"param" name:"fscache"`
	FscacheThreads string `type:"param" name:"fscache-threads"`
	Upgrade        bool   `type:"flag" name:"upgrade" default:""`
	ThreadNum      string `type:"param" name:"thread-num"`
	// `--id` is required by `--supervisor` when starting nydusd
	ID              string `type:"param" name:"id"`
	Config          string `type:"param" name:"config"`
	Bootstrap       string `type:"param" name:"bootstrap"`
	Mountpoint      string `type:"param" name:"mountpoint"`
	APISock         string `type:"param" name:"apisock"`
	LogLevel        string `type:"param" name:"log-level"`
	LogRotationSize int    `type:"param" name:"log-rotation-size"`
	Supervisor      string `type:"param" name:"supervisor"`
	LogFile         string `type:"param" name:"log-file"`
	PrefetchFiles   string `type:"param" name:"prefetch-files"`
	BackendSource   string `type:"param" name:"backend-source"`
	FailoverPolicy  string `type:"param" name:"failover-policy"`
}

type Opt = func(cmd *DaemonCommand)