minor refactor

main.go

@@ -47,19 +47,14 @@ func main() {
 		log.Fatal(err)
 	}
 
-	log.Println("waiting for update tick ...")
-	ticker := time.NewTicker(config.CheckInterval)
-	defer ticker.Stop()
-	for {
-		select {
-		case <-ticker.C:
-			log.Println("tick received checking ...")
-			func() {
-				currentPublicIP, err := getResolver(config.PublicIpResolverTag).ResolvePublicIp(ctx)
+	// public ip resolver
+	publicIpResolver := getResolver(config.PublicIpResolverTag)
+
+	checkFunc := func() {
+		currentPublicIP, err := publicIpResolver.ResolvePublicIp(ctx)
 		if err != nil {
 			log.Fatal(err)
 		}
-
 		log.Printf("Current public ip `%s`", currentPublicIP)
 
 		dns, err := allDNSRecords(ctx, api, cloudflare.ZoneIdentifier(zoneID))
@@ -91,7 +86,19 @@ func main() {
 				}
 			}
 		}
-			}()
+	}
+
+	log.Printf("checking ...")
+	checkFunc()
+
+	log.Println("waiting for check tick ...")
+	ticker := time.NewTicker(config.CheckInterval)
+	defer ticker.Stop()
+	for {
+		select {
+		case <-ticker.C:
+			log.Println("tick received checking ...")
+			checkFunc()
 		case <-ctx.Done():
 			break
 		}