Hide helm application row if local tiller

Also allow applications to be installed without helm as we already have
local tiller.

Test both cases of managed_apps_local_tiller

In the case of managed_apps_local_tiller true, we check that

- helm application does not appear
- you don't need to have installed Helm to install other applications

app/assets/javascripts/clusters/components/applications.vue

@@ -107,8 +107,12 @@ export default {
     isProjectCluster() {
       return this.type === CLUSTER_TYPE.PROJECT;
     },
+    managedAppsLocalTillerEnabled() {
+      return Boolean(gon.features?.managedAppsLocalTiller);
+    },
     helmInstalled() {
       return (
+        this.managedAppsLocalTillerEnabled ||
         this.applications.helm.status === APPLICATION_STATUS.INSTALLED ||
         this.applications.helm.status === APPLICATION_STATUS.UPDATED
       );
@@ -270,6 +274,7 @@ Crossplane runs inside your Kubernetes cluster and supports secure connectivity
 
     <div class="cluster-application-list prepend-top-10">
       <application-row
+        v-if="!managedAppsLocalTillerEnabled"
         id="helm"
         :logo-url="helmLogo"
         :title="applications.helm.title"

app/controllers/clusters/base_controller.rb

@@ -6,6 +6,10 @@ class Clusters::BaseController < ApplicationController
   skip_before_action :authenticate_user!
   before_action :authorize_read_cluster!
 
+  before_action do
+    push_frontend_feature_flag(:managed_apps_local_tiller)
+  end
+
   helper_method :clusterable
 
   private

spec/features/clusters/installing_applications_shared_examples.rb

 # frozen_string_literal: true
 
-shared_examples "installing applications on a cluster" do
+shared_examples "installing applications for a cluster" do |managed_apps_local_tiller|
   before do
+    stub_feature_flags(managed_apps_local_tiller: managed_apps_local_tiller)
+
     visit cluster_path
   end
 
@@ -26,12 +28,24 @@ shared_examples "installing applications on a cluster" do
     it 'user can install applications' do
       wait_for_requests
 
-      page.within('.js-cluster-application-row-helm') do
-        expect(page.find(:css, '.js-cluster-application-install-button')['disabled']).to be_nil
+      application_row =
+        if managed_apps_local_tiller
+          '.js-cluster-application-row-ingress'
+        else
+          '.js-cluster-application-row-helm'
+        end
+
+      page.within(application_row) do
+        expect(page).not_to have_css('.js-cluster-application-install-button[disabled]')
         expect(page).to have_css('.js-cluster-application-install-button', exact_text: 'Install')
       end
     end
 
+    if managed_apps_local_tiller
+      it 'does not show the Helm application' do
+        expect(page).not_to have_selector(:css, '.js-cluster-application-row-helm')
+      end
+    else
       context 'when user installs Helm' do
         before do
           allow(ClusterInstallAppWorker).to receive(:perform_async)
@@ -64,10 +78,11 @@ shared_examples "installing applications on a cluster" do
           expect(page).to have_content('Helm Tiller was successfully installed on your Kubernetes cluster')
         end
       end
+    end
 
     context 'when user installs Knative' do
       before do
-        create(:clusters_applications_helm, :installed, cluster: cluster)
+        create(:clusters_applications_helm, :installed, cluster: cluster) unless managed_apps_local_tiller
       end
 
       context 'on an abac cluster' do
@@ -153,7 +168,7 @@ shared_examples "installing applications on a cluster" do
         allow(ClusterWaitForIngressIpAddressWorker).to receive(:perform_in)
         allow(ClusterWaitForIngressIpAddressWorker).to receive(:perform_async)
 
-        create(:clusters_applications_helm, :installed, cluster: cluster)
+        create(:clusters_applications_helm, :installed, cluster: cluster) unless managed_apps_local_tiller
 
         page.within('.js-cluster-application-row-cert_manager') do
           click_button 'Install'
@@ -189,7 +204,7 @@ shared_examples "installing applications on a cluster" do
       before do
         allow(ClusterInstallAppWorker).to receive(:perform_async)
 
-        create(:clusters_applications_helm, :installed, cluster: cluster)
+        create(:clusters_applications_helm, :installed, cluster: cluster) unless managed_apps_local_tiller
 
         page.within('.js-cluster-application-row-elastic_stack') do
           click_button 'Install'
@@ -221,7 +236,7 @@ shared_examples "installing applications on a cluster" do
         allow(ClusterWaitForIngressIpAddressWorker).to receive(:perform_in)
         allow(ClusterWaitForIngressIpAddressWorker).to receive(:perform_async)
 
-        create(:clusters_applications_helm, :installed, cluster: cluster)
+        create(:clusters_applications_helm, :installed, cluster: cluster) unless managed_apps_local_tiller
 
         page.within('.js-cluster-application-row-ingress') do
           expect(page).to have_css('.js-cluster-application-install-button:not([disabled])')
@@ -263,3 +278,8 @@ shared_examples "installing applications on a cluster" do
     end
   end
 end
+
+shared_examples "installing applications on a cluster" do
+  it_behaves_like "installing applications for a cluster", false
+  it_behaves_like "installing applications for a cluster", true
+end

spec/frontend/clusters/components/applications_spec.js

@@ -15,6 +15,9 @@ describe('Applications', () => {
 
   beforeEach(() => {
     Applications = Vue.extend(applications);
+
+    gon.features = gon.features || {};
+    gon.features.managedAppsLocalTiller = false;
   });
 
   afterEach(() => {
@@ -156,6 +159,22 @@ describe('Applications', () => {
     });
   });
 
+  describe('Helm application', () => {
+    describe('when managedAppsLocalTiller enabled', () => {
+      beforeEach(() => {
+        gon.features.managedAppsLocalTiller = true;
+      });
+
+      it('does not render a row for Helm Tiller', () => {
+        vm = mountComponent(Applications, {
+          applications: APPLICATIONS_MOCK_STATE,
+        });
+
+        expect(vm.$el.querySelector('.js-cluster-application-row-helm')).toBeNull();
+      });
+    });
+  });
+
   describe('Ingress application', () => {
     describe('with nested component', () => {
       const propsData = {