Remove async merge request widget feature flag

Closes https://gitlab.com/gitlab-org/gitlab/issues/42724

app/assets/javascripts/mr_notes/init_notes.js

@@ -4,6 +4,7 @@ import { mapActions, mapState, mapGetters } from 'vuex';
 import store from 'ee_else_ce/mr_notes/stores';
 import notesApp from '../notes/components/notes_app.vue';
 import discussionKeyboardNavigator from '../notes/components/discussion_keyboard_navigator.vue';
+import initWidget from '../vue_merge_request_widget';
 
 export default () => {
   // eslint-disable-next-line no-new
@@ -32,11 +33,22 @@ export default () => {
       ...mapState({
         activeTab: state => state.page.activeTab,
       }),
+      isShowTabActive() {
+        return this.activeTab === 'show';
+      },
     },
     watch: {
       discussionTabCounter() {
         this.updateDiscussionTabCounter();
       },
+      isShowTabActive: {
+        handler(newVal) {
+          if (newVal) {
+            initWidget();
+          }
+        },
+        immediate: true,
+      },
     },
     created() {
       this.setActiveTab(window.mrTabs.getCurrentAction());
@@ -69,7 +81,7 @@ export default () => {
             noteableData: this.noteableData,
             notesData: this.notesData,
             userData: this.currentUserData,
-            shouldShow: this.activeTab === 'show',
+            shouldShow: this.isShowTabActive,
             helpPagePath: this.helpPagePath,
           },
         }),

app/assets/javascripts/pages/projects/merge_requests/init_merge_request_show.js

@@ -7,7 +7,6 @@ import initPipelines from '~/commit/pipelines/pipelines_bundle';
 import initVueIssuableSidebarApp from '~/issuable_sidebar/sidebar_bundle';
 import initSourcegraph from '~/sourcegraph';
 import initPopover from '~/mr_tabs_popover';
-import initWidget from '../../../vue_merge_request_widget';
 
 export default function() {
   new ZenMode(); // eslint-disable-line no-new
@@ -20,7 +19,6 @@ export default function() {
   new ShortcutsIssuable(true); // eslint-disable-line no-new
   handleLocationHash();
   howToMerge();
-  initWidget();
   initSourcegraph();
 
   const tabHighlightEl = document.querySelector('.js-tabs-feature-highlight');

app/assets/javascripts/vue_merge_request_widget/index.js

@@ -5,6 +5,8 @@ import Translate from '../vue_shared/translate';
 Vue.use(Translate);
 
 export default () => {
+  if (gl.mrWidget) return;
+
   gl.mrWidgetData.gitlabLogo = gon.gitlab_logo;
 
   const vm = new Vue(MrWidgetOptions);

app/assets/javascripts/vue_merge_request_widget/mr_widget_options.vue

@@ -135,15 +135,11 @@ export default {
     },
   },
   mounted() {
-    if (gon && gon.features && gon.features.asyncMrWidget) {
-      MRWidgetService.fetchInitialData()
-        .then(({ data }) => this.initWidget(data))
-        .catch(() =>
-          createFlash(__('Unable to load the merge request widget. Try reloading the page.')),
-        );
-    } else {
-      this.initWidget();
-    }
+    MRWidgetService.fetchInitialData()
+      .then(({ data }) => this.initWidget(data))
+      .catch(() =>
+        createFlash(__('Unable to load the merge request widget. Try reloading the page.')),
+      );
   },
   beforeDestroy() {
     eventHub.$off('mr.discussion.updated', this.checkStatus);

app/controllers/projects/merge_requests_controller.rb

@@ -25,7 +25,6 @@ class Projects::MergeRequestsController < Projects::MergeRequests::ApplicationCo
 
   before_action do
     push_frontend_feature_flag(:vue_issuable_sidebar, @project.group)
-    push_frontend_feature_flag(:async_mr_widget, @project)
   end
 
   around_action :allow_gitaly_ref_name_caching, only: [:index, :show, :discussions]

app/serializers/merge_request_widget_entity.rb

@@ -67,14 +67,6 @@ class MergeRequestWidgetEntity < Grape::Entity
     end
   end
 
-  def as_json(options = {})
-    return super(options) if Feature.enabled?(:async_mr_widget)
-
-    super(options)
-      .merge(MergeRequestPollCachedWidgetEntity.new(object, **@options.opts_hash).as_json(options))
-      .merge(MergeRequestPollWidgetEntity.new(object, **@options.opts_hash).as_json(options))
-  end
-
   private
 
   delegate :current_user, to: :request

changelogs/unreleased/ph-42724-removeAsyncMRWidgetFlag.yml

+---
+title: Fetch merge request widget data asynchronous
+merge_request: 23594
+author:
+type: changed