more updates

internal/generator/manifests.go

@@ -181,6 +181,22 @@ func Ingress(env *config.ResolvedEnvironment, _ interpolate.Tokens) (string, err
 		b.WriteString("    nginx.ingress.kubernetes.io/auth-realm: \"Authentication Required\"\n")
 	}
 
+	// external-dns annotations: collect all hostnames that need DNS records.
+	if !env.SkipDNS {
+		var dnsHosts []string
+		for _, h := range env.Ingress.Hosts {
+			if h.DNSRecord {
+				dnsHosts = append(dnsHosts, h.Hostname)
+			}
+		}
+		if len(dnsHosts) > 0 {
+			fmt.Fprintf(&b, "    external-dns.alpha.kubernetes.io/hostname: \"%s\"\n", strings.Join(dnsHosts, ","))
+			if env.DNSTarget != "" {
+				fmt.Fprintf(&b, "    external-dns.alpha.kubernetes.io/target: \"%s\"\n", env.DNSTarget)
+			}
+		}
+	}
+
 	b.WriteString("spec:\n")
 	fmt.Fprintf(&b, "  ingressClassName: %s\n", env.IngressClass)
 
@@ -405,6 +421,26 @@ func renderStrSlice(ss []string) string {
 	return "[" + strings.Join(quoted, ", ") + "]"
 }
 
+// Namespace generates a Namespace manifest. Used for preview
+// environments where the namespace must be created by kubectl apply.
+func Namespace(namespace string, labels map[string]string) string {
+	var b strings.Builder
+	b.WriteString("apiVersion: v1\nkind: Namespace\nmetadata:\n")
+	fmt.Fprintf(&b, "  name: %s\n", namespace)
+	if len(labels) > 0 {
+		b.WriteString("  labels:\n")
+		// Stable key order.
+		keys := make([]string, 0, len(labels))
+		for k := range labels {
+			keys = append(keys, k)
+		}
+		for _, k := range keys {
+			fmt.Fprintf(&b, "    %s: %q\n", k, labels[k])
+		}
+	}
+	return b.String()
+}
+
 // render executes a template with data and returns the result.
 func render(t *template.Template, data any) (string, error) {
 	var buf bytes.Buffer