Organise ~/issuable code

Move init functions into `index.js` and delete `issuable_index.js`
as it is not a useful extra class

app/assets/javascripts/issuable/init_csv_import_export_buttons.js → app/assets/javascripts/issuable/index.js

+import { GlToast } from '@gitlab/ui';
 import Vue from 'vue';
+import IssuableContext from '~/issuable/issuable_context';
 import { parseBoolean } from '~/lib/utils/common_utils';
+import Sidebar from '~/right_sidebar';
+import { getSidebarOptions } from '~/sidebar/mount_sidebar';
 import CsvImportExportButtons from './components/csv_import_export_buttons.vue';
+import IssuableByEmail from './components/issuable_by_email.vue';
+import IssuableHeaderWarnings from './components/issuable_header_warnings.vue';
 
-export default () => {
+export function initCsvImportExportButtons() {
   const el = document.querySelector('.js-csv-import-export-buttons');
 
   if (!el) return null;
@@ -45,4 +51,66 @@ export default () => {
       });
     },
   });
-};
+}
+
+export function initIssuableByEmail() {
+  Vue.use(GlToast);
+
+  const el = document.querySelector('.js-issueable-by-email');
+
+  if (!el) return null;
+
+  const {
+    initialEmail,
+    issuableType,
+    emailsHelpPagePath,
+    quickActionsHelpPath,
+    markdownHelpPath,
+    resetPath,
+  } = el.dataset;
+
+  return new Vue({
+    el,
+    provide: {
+      initialEmail,
+      issuableType,
+      emailsHelpPagePath,
+      quickActionsHelpPath,
+      markdownHelpPath,
+      resetPath,
+    },
+    render(h) {
+      return h(IssuableByEmail);
+    },
+  });
+}
+
+export function initIssuableHeaderWarnings(store) {
+  const el = document.getElementById('js-issuable-header-warnings');
+
+  if (!el) {
+    return false;
+  }
+
+  const { hidden } = el.dataset;
+
+  return new Vue({
+    el,
+    store,
+    provide: { hidden: parseBoolean(hidden) },
+    render(createElement) {
+      return createElement(IssuableHeaderWarnings);
+    },
+  });
+}
+
+export function initIssuableSidebar() {
+  const sidebarOptEl = document.querySelector('.js-sidebar-options');
+
+  if (!sidebarOptEl) return;
+
+  const sidebarOptions = getSidebarOptions(sidebarOptEl);
+
+  new IssuableContext(sidebarOptions.currentUser); // eslint-disable-line no-new
+  Sidebar.initialize();
+}

app/assets/javascripts/issuable/init_issuable_by_email.js

-import { GlToast } from '@gitlab/ui';
-import Vue from 'vue';
-import IssuableByEmail from './components/issuable_by_email.vue';
-
-Vue.use(GlToast);
-
-export default () => {
-  const el = document.querySelector('.js-issueable-by-email');
-
-  if (!el) return null;
-
-  const {
-    initialEmail,
-    issuableType,
-    emailsHelpPagePath,
-    quickActionsHelpPath,
-    markdownHelpPath,
-    resetPath,
-  } = el.dataset;
-
-  return new Vue({
-    el,
-    provide: {
-      initialEmail,
-      issuableType,
-      emailsHelpPagePath,
-      quickActionsHelpPath,
-      markdownHelpPath,
-      resetPath,
-    },
-    render(h) {
-      return h(IssuableByEmail);
-    },
-  });
-};

app/assets/javascripts/issuable/init_issuable_header_warning.js

-import Vue from 'vue';
-import { parseBoolean } from '~/lib/utils/common_utils';
-import IssuableHeaderWarnings from './components/issuable_header_warnings.vue';
-
-export default function issuableHeaderWarnings(store) {
-  const el = document.getElementById('js-issuable-header-warnings');
-
-  if (!el) {
-    return false;
-  }
-
-  const { hidden } = el.dataset;
-
-  return new Vue({
-    el,
-    store,
-    provide: { hidden: parseBoolean(hidden) },
-    render(createElement) {
-      return createElement(IssuableHeaderWarnings);
-    },
-  });
-}

app/assets/javascripts/issuable/init_issuable_sidebar.js

-/* eslint-disable no-new */
-
-import { getSidebarOptions } from '~/sidebar/mount_sidebar';
-import IssuableContext from '~/issuable/issuable_context';
-import Sidebar from '~/right_sidebar';
-
-export default () => {
-  const sidebarOptEl = document.querySelector('.js-sidebar-options');
-
-  if (!sidebarOptEl) return;
-
-  const sidebarOptions = getSidebarOptions(sidebarOptEl);
-
-  new IssuableContext(sidebarOptions.currentUser);
-  Sidebar.initialize();
-};

app/assets/javascripts/issuable/issuable_index.js

-import issuableInitBulkUpdateSidebar from '~/issuable/bulk_update_sidebar/issuable_init_bulk_update_sidebar';
-
-export default class IssuableIndex {
-  constructor(pagePrefix = 'issuable_') {
-    issuableInitBulkUpdateSidebar.init(pagePrefix);
-  }
-}

app/assets/javascripts/issues/show.js

 import loadAwardsHandler from '~/awards_handler';
 import ShortcutsIssuable from '~/behaviors/shortcuts/shortcuts_issuable';
-import initIssuableSidebar from '~/issuable/init_issuable_sidebar';
+import { initIssuableHeaderWarnings, initIssuableSidebar } from '~/issuable';
 import { IssuableType } from '~/vue_shared/issuable/show/constants';
 import Issue from '~/issues/issue';
 import { initIncidentApp, initIncidentHeaderActions } from '~/issues/show/incident';
@@ -10,7 +10,6 @@ import initNotesApp from '~/notes';
 import { store } from '~/notes/stores';
 import initRelatedMergeRequestsApp from '~/issues/related_merge_requests';
 import initSentryErrorStackTraceApp from '~/issues/sentry_error_stack_trace';
-import initIssuableHeaderWarning from '~/issuable/init_issuable_header_warning';
 import ZenMode from '~/zen_mode';
 
 export default function initShowIssue() {
@@ -33,7 +32,7 @@ export default function initShowIssue() {
       break;
   }
 
-  initIssuableHeaderWarning(store);
+  initIssuableHeaderWarnings(store);
   initSentryErrorStackTraceApp();
   initRelatedMergeRequestsApp();
 

app/assets/javascripts/merge_conflicts/merge_conflicts_bundle.js

 import Vue from 'vue';
-import initIssuableSidebar from '~/issuable/init_issuable_sidebar';
+import { initIssuableSidebar } from '~/issuable';
 import MergeConflictsResolverApp from './merge_conflict_resolver_app.vue';
 import { createStore } from './store';
 

app/assets/javascripts/pages/projects/issues/index/index.js

 import IssuableFilteredSearchTokenKeys from 'ee_else_ce/filtered_search/issuable_filtered_search_token_keys';
 import ShortcutsNavigation from '~/behaviors/shortcuts/shortcuts_navigation';
-import initCsvImportExportButtons from '~/issuable/init_csv_import_export_buttons';
-import initIssuableByEmail from '~/issuable/init_issuable_by_email';
-import IssuableIndex from '~/issuable/issuable_index';
+import { initCsvImportExportButtons, initIssuableByEmail } from '~/issuable';
+import issuableInitBulkUpdateSidebar from '~/issuable/bulk_update_sidebar/issuable_init_bulk_update_sidebar';
 import { mountIssuablesListApp, mountIssuesListApp, mountJiraIssuesListApp } from '~/issues_list';
 import initManualOrdering from '~/issues/manual_ordering';
 import { FILTERED_SEARCH } from '~/filtered_search/constants';
@@ -21,7 +20,7 @@ if (gon.features?.vueIssuesList) {
     useDefaultState: true,
   });
 
-  new IssuableIndex(ISSUABLE_INDEX.ISSUE); // eslint-disable-line no-new
+  issuableInitBulkUpdateSidebar.init(ISSUABLE_INDEX.ISSUE);
   new UsersSelect(); // eslint-disable-line no-new
 
   initCsvImportExportButtons();

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

 import addExtraTokensForMergeRequests from 'ee_else_ce/filtered_search/add_extra_tokens_for_merge_requests';
 import ShortcutsNavigation from '~/behaviors/shortcuts/shortcuts_navigation';
 import IssuableFilteredSearchTokenKeys from '~/filtered_search/issuable_filtered_search_token_keys';
-import initCsvImportExportButtons from '~/issuable/init_csv_import_export_buttons';
-import initIssuableByEmail from '~/issuable/init_issuable_by_email';
-import IssuableIndex from '~/issuable/issuable_index';
+import { initCsvImportExportButtons, initIssuableByEmail } from '~/issuable';
+import issuableInitBulkUpdateSidebar from '~/issuable/bulk_update_sidebar/issuable_init_bulk_update_sidebar';
 import { FILTERED_SEARCH } from '~/filtered_search/constants';
 import { ISSUABLE_INDEX } from '~/issuable/constants';
 import initFilteredSearch from '~/pages/search/init_filtered_search';
 import UsersSelect from '~/users_select';
 
-new IssuableIndex(ISSUABLE_INDEX.MERGE_REQUEST); // eslint-disable-line no-new
+issuableInitBulkUpdateSidebar.init(ISSUABLE_INDEX.MERGE_REQUEST);
 
 addExtraTokensForMergeRequests(IssuableFilteredSearchTokenKeys);
 IssuableFilteredSearchTokenKeys.removeTokensForKeys('iteration');

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

@@ -3,7 +3,7 @@ import VueApollo from 'vue-apollo';
 import loadAwardsHandler from '~/awards_handler';
 import ShortcutsIssuable from '~/behaviors/shortcuts/shortcuts_issuable';
 import { initPipelineCountListener } from '~/commit/pipelines/utils';
-import initIssuableSidebar from '~/issuable/init_issuable_sidebar';
+import { initIssuableSidebar } from '~/issuable';
 import StatusBox from '~/issuable/components/status_box.vue';
 import createDefaultClient from '~/lib/graphql';
 import initSourcegraph from '~/sourcegraph';

app/assets/javascripts/pages/projects/merge_requests/show/index.js

 import { initReviewBar } from '~/batch_comments';
+import { initIssuableHeaderWarnings } from '~/issuable';
 import initMrNotes from '~/mr_notes';
 import store from '~/mr_notes/stores';
 import initSidebarBundle from '~/sidebar/sidebar_bundle';
-import initIssuableHeaderWarning from '~/issuable/init_issuable_header_warning';
 import initShow from '../init_merge_request_show';
 
 initMrNotes();
@@ -11,5 +11,5 @@ initShow();
 requestIdleCallback(() => {
   initSidebarBundle(store);
   initReviewBar();
-  initIssuableHeaderWarning(store);
+  initIssuableHeaderWarnings(store);
 });

spec/frontend/issuable/issuable_spec.js

-import issuableInitBulkUpdateSidebar from '~/issuable/bulk_update_sidebar/issuable_init_bulk_update_sidebar';
-import IssuableIndex from '~/issuable/issuable_index';
-
-describe('Issuable', () => {
-  describe('initBulkUpdate', () => {
-    it('should not set bulkUpdateSidebar', () => {
-      new IssuableIndex('issue_'); // eslint-disable-line no-new
-
-      expect(issuableInitBulkUpdateSidebar.bulkUpdateSidebar).toBeNull();
-    });
-
-    it('should set bulkUpdateSidebar', () => {
-      const element = document.createElement('div');
-      element.classList.add('issues-bulk-update');
-      document.body.appendChild(element);
-
-      new IssuableIndex('issue_'); // eslint-disable-line no-new
-
-      expect(issuableInitBulkUpdateSidebar.bulkUpdateSidebar).toBeDefined();
-    });
-  });
-});