refactor: handle SIGTERM

cmd/rc-arduino/rc-arduino.go

@@ -6,6 +6,8 @@ import (
 	"github.com/cyrilix/robocar-base/cli"
 	"go.uber.org/zap"
 	"log"
+	"os/signal"
+	"syscall"
 
 	"os"
 )
@@ -70,9 +72,7 @@ func main() {
 		log.Fatalf("unable to init logger: %v", err)
 	}
 	defer func() {
-		if err := lgr.Sync(); err != nil {
+		_ = lgr.Sync()
-			log.Printf("unable to Sync logger: %v\n", err)
-		}
 	}()
 	zap.ReplaceGlobals(lgr)
 
@@ -80,12 +80,24 @@ func main() {
 	if err != nil {
 		zap.S().Fatalf("unable to connect to mqtt broker: %v", err)
 	}
-	defer client.Disconnect(10)
+	defer func() {
+		zap.S().Infof("disconnect mqtt connection")
+		client.Disconnect(10)
+	}()
 
 	sc := arduino.NewAsymetricPWMSteeringConfig(steeringLeftPWM, steeringRightPWM, steeringCenterPWM)
 	a := arduino.NewPart(client, device, baud, throttleTopic, steeringTopic, driveModeTopic, switchRecordTopic, pubFrequency, sc)
-	err = a.Start()
+
-	if err != nil {
+	go func() {
-		zap.S().Errorw("unable to start service", "error", err)
+		err = a.Start()
-	}
+		if err != nil {
+			zap.S().Panicw("unable to start service", "error", err)
+		}
+	}()
+	defer a.Stop()
+
+	exitChan := make(chan os.Signal)
+	signal.Notify(exitChan, syscall.SIGTERM)
+	<-exitChan
+	zap.S().Info("exit on sigterm")
 }