Chore: put log in engine

engine/engine.go

@@ -17,13 +17,17 @@ import (
 var _engine = &engine{}
 
 // Start starts the default engine up.
-func Start() error {
-	return _engine.start()
+func Start() {
+	if err := _engine.start(); err != nil {
+		log.Fatalf("[ENGINE] failed to start: %v", err)
+	}
 }
 
 // Stop shuts the default engine down.
-func Stop() error {
-	return _engine.stop()
+func Stop() {
+	if err := _engine.stop(); err != nil {
+		log.Fatalf("[ENGINE] failed to stop: %v", err)
+	}
 }
 
 // Insert loads *Key to the default engine.
@@ -120,7 +124,7 @@ func (e *engine) applyStats() error {
 
 		go func() {
 			if err := stats.Start(addr.String(), e.Token); err != nil {
-				log.Warnf("[STATS] stats start error: %v", err)
+				log.Warnf("[STATS] failed to start: %v", err)
 			}
 		}()
 		log.Infof("[STATS] serve at: http://%s", addr)

main.go

@@ -49,23 +49,17 @@ func main() {
 	if configFile != "" {
 		data, err := os.ReadFile(configFile)
 		if err != nil {
-			log.Fatalf("Failed to read config %s: %v", configFile, err)
+			log.Fatalf("Failed to read config file '%s': %v", configFile, err)
 		}
 		if err = yaml.Unmarshal(data, key); err != nil {
-			log.Fatalf("Failed to unmarshal config %s: %v", configFile, err)
+			log.Fatalf("Failed to unmarshal config file '%s': %v", configFile, err)
 		}
 	}
 
 	engine.Insert(key)
 
-	assert := func(msg string, f func() error) {
-		if err := f(); err != nil {
-			log.Fatalf("Failed to %s: %v", msg, err)
-		}
-	}
-
-	assert("start engine", engine.Start)
-	defer assert("stop engine", engine.Stop)
+	engine.Start()
+	defer engine.Stop()
 
 	sigCh := make(chan os.Signal, 1)
 	signal.Notify(sigCh, syscall.SIGINT, syscall.SIGTERM)