package conf type Log struct { Level string `json:"Level,omitempty"` Output string `json:"Output,omitempty"` MaxBackups int `json:"MaxBackups,omitempty"` MaxSize int `json:"MaxSize,omitempty"` MaxAge int `json:"MaxAge,omitempty"` } func newLog() Log { return Log{ Level: "info", Output: "", MaxBackups: 3, MaxSize: 100, MaxAge: 28, } }