jpictl: refactor dns.Manager factory to support Provider data

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

cmd/jpictl/dns.go

@@ -10,9 +10,7 @@ import (
 	"git.jpi.io/amery/jpictl/pkg/dns"
 )
 
-func newDNSManager(m *cluster.Cluster) (*dns.Manager, error) {
+func newDNSManager(m *cluster.Cluster, provider dns.Provider) (*dns.Manager, error) {
-	ctx := context.TODO()
-
 	domain := m.Domain
 	if m.Name != "" {
 		domain = m.Name + "." + domain
@@ -23,6 +21,26 @@ func newDNSManager(m *cluster.Cluster) (*dns.Manager, error) {
 		return nil, err
 	}
 
+	if provider != nil {
+		// set provider only  if specified
+		err = dns.WithProvider(provider)(mgr)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	if err := populateDNSManager(mgr, m); err != nil {
+		return nil, err
+	}
+
+	return mgr, nil
+}
+
+func populateDNSManager(mgr *dns.Manager, m *cluster.Cluster) error {
+	var err error
+
+	ctx := context.TODO()
+
 	m.ForEachZone(func(z *cluster.Zone) bool {
 		z.ForEachMachine(func(p *cluster.Machine) bool {
 			err = mgr.AddHost(ctx, z.Name, p.ID, true, p.PublicAddresses...)
@@ -32,7 +50,7 @@ func newDNSManager(m *cluster.Cluster) (*dns.Manager, error) {
 		return err != nil
 	})
 	if err != nil {
-		return nil, err
+		return err
 	}
 
 	m.ForEachRegion(func(r *cluster.Region) bool {
@@ -43,11 +61,8 @@ func newDNSManager(m *cluster.Cluster) (*dns.Manager, error) {
 
 		return err != nil
 	})
-	if err != nil {
-		return nil, err
-	}
 
-	return mgr, nil
+	return err
 }
 
 // Command
@@ -65,7 +80,7 @@ var dnsWriteCmd = &cobra.Command{
 			return err
 		}
 
-		mgr, err := newDNSManager(m)
+		mgr, err := newDNSManager(m, nil)
 		if err != nil {
 			return err
 		}