Do not update helm version when externally_installed

If need be, we create the helm record. We assume the helm record is also
externally installed.

app/models/clusters/concerns/application_status.rb

@@ -97,13 +97,21 @@ module Clusters
             application.status_reason = status_reason if status_reason
           end
 
-          before_transition any => [:installed, :updated] do |application, _|
-            # When installing any application we are also performing an update
-            # of tiller (see Gitlab::Kubernetes::Helm::ClientCommand) so
-            # therefore we need to reflect that in the database.
-
-            unless ::Gitlab::Kubernetes::Helm.local_tiller_enabled?
-              application.cluster.application_helm.update!(version: Gitlab::Kubernetes::Helm::HELM_VERSION)
+          before_transition any => [:installed, :updated] do |application, transition|
+            unless ::Gitlab::Kubernetes::Helm.local_tiller_enabled? || application.is_a?(Clusters::Applications::Helm)
+              if transition.event == :make_externally_installed
+                # If an application is externally installed
+                # We assume the helm application is externally installed too
+                helm = application.cluster.application_helm || application.cluster.build_application_helm
+
+                helm.make_externally_installed!
+              else
+                # When installing any application we are also performing an update
+                # of tiller (see Gitlab::Kubernetes::Helm::ClientCommand) so
+                # therefore we need to reflect that in the database.
+
+                application.cluster.application_helm.update!(version: Gitlab::Kubernetes::Helm::HELM_VERSION)
+              end
             end
           end
 

spec/support/shared_examples/models/cluster_application_status_shared_examples.rb

@@ -197,12 +197,73 @@ RSpec.shared_examples 'cluster application status specs' do |application_name|
     describe '#make_externally_installed' do
       subject { create(application_name, :installing) }
 
+      let(:old_helm) { create(:clusters_applications_helm, version: '1.2.3') }
+
       it 'is installed' do
         subject.make_externally_installed
 
         expect(subject).to be_installed
       end
 
+      context 'local tiller flag enabled' do
+        before do
+          stub_feature_flags(managed_apps_local_tiller: true)
+        end
+
+        context 'helm record does not exist' do
+          subject { build(application_name, :installing, :no_helm_installed) }
+
+          it 'does not create a helm record' do
+            subject.make_externally_installed!
+
+            subject.cluster.reload
+            expect(subject.cluster.application_helm).to be_nil
+          end
+        end
+
+        context 'helm record exists' do
+          subject { build(application_name, :installing, cluster: old_helm.cluster) }
+
+          it 'does not update helm version' do
+            subject.make_externally_installed!
+
+            subject.cluster.application_helm.reload
+
+            expect(subject.cluster.application_helm.version).to eq('1.2.3')
+          end
+        end
+      end
+
+      context 'local tiller flag disabled' do
+        before do
+          stub_feature_flags(managed_apps_local_tiller: false)
+        end
+
+        context 'helm record does not exist' do
+          subject { build(application_name, :installing, :no_helm_installed) }
+
+          it 'creates a helm record' do
+            subject.make_externally_installed!
+
+            subject.cluster.reload
+            expect(subject.cluster.application_helm).to be_present
+            expect(subject.cluster.application_helm).to be_persisted
+          end
+        end
+
+        context 'helm record exists' do
+          subject { build(application_name, :installing, cluster: old_helm.cluster) }
+
+          it 'does not update helm version' do
+            subject.make_externally_installed!
+
+            subject.cluster.application_helm.reload
+
+            expect(subject.cluster.application_helm.version).to eq('1.2.3')
+          end
+        end
+      end
+
       context 'application is updated' do
         subject { create(application_name, :updated) }