Fix Gen2 tutorial (#340)

* doc fix, gen2

* validation for static profiles gen2 clusters

docs/gen2_Tutorial.md

@@ -10,6 +10,8 @@ typically contains multiple related resources that together define an arbitraril
 If you make subsequent changes to the base cluster, workload clusters originally created from it
 will automatically acquire the changes.
 
+**NB: Base clusters only support dynamic profiles.**
+
 ## Creating Cluster-API cluster manifest
 
 Note: The CAPA version used here is v2.0 and the manifests created here are in accordance with this version.
@@ -376,7 +378,7 @@ To update the profiles of a gen2 workload cluster:
 # To add a new profile to the existing cluster
 arlon cluster ngupdate <clustername> --profile <profilename>
 # To delete an existing profile from the existing cluster
-arlon cluster ngupdate <clustername> --delete-profile <profilename>
+arlon cluster ngupdate <clustername> --delete-profile
 ```
 
 A gen2 cluster can be created without any profile app associated with the cluster. So, the above commands can be used to add a new profile

pkg/cluster/ngupdate.go

@@ -1,6 +1,7 @@
 package cluster
 
 import (
+	"errors"
 	"fmt"
 
 	argoapp "github.com/argoproj/argo-cd/v2/pkg/apiclient/application"
@@ -23,6 +24,9 @@ func NgUpdate(
 	if err != nil {
 		return nil, fmt.Errorf("failed to get profile: %s", err)
 	}
+	if prof.Spec.RepoUrl == "" {
+		return nil, errors.New("RepoUrl empty, static profiles are unsupported")
+	}
 	err = DestroyProfileApps(appIf, clusterName)
 	if err != nil {
 		return nil, fmt.Errorf("Failed to delete profile app: %s", err)