glog

type Logger interface {
	AddCallerSkip(n int) Logger

	WithField(key string, val interface{}) Logger
	WithFields(key string, val interface{}, kvs ...interface{}) Logger

	Data(val interface{}) Logger
	Action(val string) Logger
	Request(val interface{}) Logger
	Response(val interface{}) Logger

	Debug(msg string)
	Info(msg string)
	Warn(msg string)
	Error(msg string)
	Fatal(msg string)
}

type Options struct {
	Output      string `json:"output" yaml:"output"`
	Format      string `json:"format" yaml:"format"`
	Level       string `json:"level" yaml:"level"`
	TimeFormat  string `json:"time_format" yaml:"time_format"`
	NoAddCaller bool   `json:"no_caller" yaml:"no_caller"`

	// Output == OutputFile
	FileName string `json:"file_name" yaml:"file_name"`
	Size     int    `json:"size" yaml:"size"`
}