jpictl: refactor dns command initialization

Signed-off-by: Alejandro Mery <amery@jpi.io>

cmd/jpictl/dns.go

@@ -72,6 +72,29 @@ func populateDNSManager(mgr *dns.Manager, m *cluster.Cluster) error {
 	return err
 }
 
+// revive:disable:flag-parameter
+func newDNSManagerCommand(_ *cobra.Command,
+	resolve bool, withCredentials bool) (*dns.Manager, error) {
+	// revive:enable:flag-parameter
+	var cred dns.Provider
+
+	if withCredentials {
+		var err error
+
+		cred, err = dns.DefaultDNSProvider()
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	m, err := cfg.LoadZones(resolve)
+	if err != nil {
+		return nil, err
+	}
+
+	return newDNSManager(m, cred)
+}
+
 // Command
 var dnsCmd = &cobra.Command{
 	Use: "dns",
@@ -81,13 +104,8 @@ var dnsWriteCmd = &cobra.Command{
 	Use:    "write",
 	Short:  "dns write generates public DNS records",
 	PreRun: setVerbosity,
-	RunE: func(_ *cobra.Command, _ []string) error {
-		m, err := cfg.LoadZones(true)
-		if err != nil {
-			return err
-		}
-
-		mgr, err := newDNSManager(m, nil)
+	RunE: func(cmd *cobra.Command, _ []string) error {
+		mgr, err := newDNSManagerCommand(cmd, true, false)
 		if err != nil {
 			return err
 		}
@@ -101,18 +119,8 @@ var dnsSyncCmd = &cobra.Command{
 	Use:    "sync",
 	Short:  "dns sync updates public DNS records",
 	PreRun: setVerbosity,
-	RunE: func(_ *cobra.Command, _ []string) error {
-		cred, err := dns.DefaultDNSProvider()
-		if err != nil {
-			return err
-		}
-
-		m, err := cfg.LoadZones(true)
-		if err != nil {
-			return err
-		}
-
-		mgr, err := newDNSManager(m, cred)
+	RunE: func(cmd *cobra.Command, _ []string) error {
+		mgr, err := newDNSManagerCommand(cmd, true, true)
 		if err != nil {
 			return err
 		}