capture sentry alert with error

sentry_example.go

func (a *alertWrapper) Error(err error) error {
	// sentry Go SDK uses asynchronous transport, if fatal (os.Exit) or panic is called after the alert
	// the event might get dropped, so we call Flush explicitly.
	defer sentry.Flush(time.Second * 2)

	hub := sentry.CurrentHub().Clone()

	ev := sentry.NewEvent()
	ev.Level = sentry.LevelError

	// add custom tags here.. optional
	ev.Tags = map[string]string{}

	ev.Message = err.Error()

	ev.Extra = map[string]interface{}{
		"Version":      runtime.Version(),
		"NumCPU":       runtime.NumCPU(),
		"GOMAXPROCS":   runtime.GOMAXPROCS(0),
		"NumGoroutine": runtime.NumGoroutine(),
	}

	stack := sentry.ExtractStacktrace(err)
	ev.Exception = []sentry.Exception{{
		Type:       err.Error(),
		Value:      fmt.Sprintf("%T", err),
		Stacktrace: stack,
	}}

	if _, ok := err.(interface{ Cause() error }); ok {
		e := errors.Cause(err)

		ev.Exception[0].Type = e.Error()
		ev.Exception[0].Value = fmt.Sprintf("%T", e)
	}

	hub.CaptureEvent(ev)

	return err
}