minor refactor

main.go

@@ -47,51 +47,58 @@ func main() {
 		log.Fatal(err)
 	}
 
-	log.Println("waiting for update tick ...")
+	// 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))
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		for _, dnsRecord := range dns {
+			if internal.Contains(config.DnsRecordsToCheck, dnsRecord.Name) {
+				log.Printf("Checking record `%s` with current value `%s` ...", dnsRecord.Name, dnsRecord.Content)
+				if currentPublicIP.String() == dnsRecord.Content {
+					log.Println("OK")
+					continue // no update needed
+				}
+
+				update := cloudflare.UpdateDNSRecordParams{
+					ID:      dnsRecord.ID,
+					Content: currentPublicIP.String(),
+				}
+
+				if config.OnChangeComment != "" {
+					update.Comment = config.OnChangeComment
+				}
+
+				if _, err := api.UpdateDNSRecord(ctx, cloudflare.ZoneIdentifier(zoneID), update); err != nil {
+					log.Printf("error updating dns record: %s", err)
+				} else {
+					log.Printf("Updated to `%s`", currentPublicIP)
+				}
+			}
+		}
+	}
+
+	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 ...")
-			func() {
-				currentPublicIP, err := getResolver(config.PublicIpResolverTag).ResolvePublicIp(ctx)
-				if err != nil {
-					log.Fatal(err)
-				}
-
-				log.Printf("Current public ip `%s`", currentPublicIP)
-
-				dns, err := allDNSRecords(ctx, api, cloudflare.ZoneIdentifier(zoneID))
-				if err != nil {
-					log.Fatal(err)
-				}
-
-				for _, dnsRecord := range dns {
-					if internal.Contains(config.DnsRecordsToCheck, dnsRecord.Name) {
-						log.Printf("Checking record `%s` with current value `%s` ...", dnsRecord.Name, dnsRecord.Content)
-						if currentPublicIP.String() == dnsRecord.Content {
-							log.Println("OK")
-							continue // no update needed
-						}
-
-						update := cloudflare.UpdateDNSRecordParams{
-							ID:      dnsRecord.ID,
-							Content: currentPublicIP.String(),
-						}
-
-						if config.OnChangeComment != "" {
-							update.Comment = config.OnChangeComment
-						}
-
-						if _, err := api.UpdateDNSRecord(ctx, cloudflare.ZoneIdentifier(zoneID), update); err != nil {
-							log.Printf("error updating dns record: %s", err)
-						} else {
-							log.Printf("Updated to `%s`", currentPublicIP)
-						}
-					}
-				}
-			}()
+			checkFunc()
 		case <-ctx.Done():
 			break
 		}