CE port for Group bulk edit merge requests

Add bulk update sidebar to merge requests template
Add js to toggle sidebar
Fix bulk update button in issues template
Add specs for merge requests in bulk update service

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

 import projectSelect from '~/project_select';
 import initFilteredSearch from '~/pages/search/init_filtered_search';
+import issuableInitBulkUpdateSidebar from '~/issuable_init_bulk_update_sidebar';
 import IssuableFilteredSearchTokenKeys from '~/filtered_search/issuable_filtered_search_token_keys';
 import addExtraTokensForMergeRequests from 'ee_else_ce/filtered_search/add_extra_tokens_for_merge_requests';
 import { FILTERED_SEARCH } from '~/pages/constants';
+const ISSUABLE_BULK_UPDATE_PREFIX = 'merge_request_';
+
 document.addEventListener('DOMContentLoaded', () => {
   addExtraTokensForMergeRequests(IssuableFilteredSearchTokenKeys);
+  issuableInitBulkUpdateSidebar.init(ISSUABLE_BULK_UPDATE_PREFIX);
   initFilteredSearch({
     page: FILTERED_SEARCH.MERGE_REQUESTS,

app/views/groups/issues.html.haml

@@ -13,7 +13,7 @@
       = render 'shared/issuable/feed_buttons'
       - if @can_bulk_update
-        = render_if_exists 'shared/issuable/bulk_update_button'
+        = render_if_exists 'shared/issuable/bulk_update_button', type: :issues
       = render 'shared/new_project_item_select', path: 'issues/new', label: "New issue", type: :issues, with_feature_enabled: 'issues', with_shared: false, include_projects_in_subgroups: true

app/views/groups/merge_requests.html.haml

+- @can_bulk_update = can?(current_user, :admin_merge_request, @group)
+
 - page_title "Merge Requests"
 - if group_merge_requests_count(state: 'all').zero?
@@ -7,8 +9,14 @@
     = render 'shared/issuable/nav', type: :merge_requests
     - if current_user
       .nav-controls
+        - if @can_bulk_update
+          = render_if_exists 'shared/issuable/bulk_update_button', type: :merge_requests
+
         = render 'shared/new_project_item_select', path: 'merge_requests/new', label: "New merge request", type: :merge_requests, with_feature_enabled: 'merge_requests', with_shared: false, include_projects_in_subgroups: true
   = render 'shared/issuable/search_bar', type: :merge_requests
+  - if @can_bulk_update
+    = render_if_exists 'shared/issuable/group_bulk_update_sidebar', group: @group, type: :merge_requests
+
   = render 'shared/merge_requests'

doc/user/group/bulk_editing/index.md

-# Bulk editing issue milestones **(PREMIUM)**
-> [Introduced](https://gitlab.com/gitlab-org/gitlab-ee/issues/7249) in
-[GitLab Ultimate](https://about.gitlab.com/pricing/) 12.1.
-NOTE: **Note:**
-A permission level of `Reporter` or higher is required in order to manage issues.
-Milestones can be updated simultaneously across multiple issues by using the bulk editing feature.
+# Bulk editing issue and merge request milestones **(PREMIUM)**
+> - [Introduced](https://gitlab.com/gitlab-org/gitlab-ee/issues/7249) for issues in
+  [GitLab Premium](https://about.gitlab.com/pricing/) 12.1.
+> - [Introduced](https://gitlab.com/gitlab-org/gitlab-ee/issues/12719) for merge
+  requests in GitLab [GitLab Premium](https://about.gitlab.com/pricing/) 12.2.
+> NOTE: **Note:**
+>
+> - A permission level of `Reporter` or higher is required in order to manage issues.
+> - A permission level of `Developer` or higher is required in order to manage merge requests.
+Milestones can be updated simultaneously across multiple issues or merge requests by using the bulk editing feature.
 ![Bulk editing](img/bulk-editing.png)
-To bulk update group issue milestones:
-1. Navigate to the issues list.
-1. Click **Edit issues**.
+To bulk update group issue or merge request milestones:
+1. Navigate to the issues or merge requests list.
+1. Click the **Edit issues** or **Edit merge requests** button.
     - This will open a sidebar on the right-hand side of your screen where an editable field
   for milestones will be displayed.
-    - Checkboxes will also appear beside each issue.
+    - Checkboxes will also appear beside each issue or merge request.
 1. Check the checkbox beside each issue to be edited.
 1. Select the desired milestone from the sidebar.
 1. Click **Update all**.

doc/user/group/index.md

@@ -78,9 +78,9 @@ Issues and merge requests are part of projects. For a given group, you can view
 [issues](../project/issues/index.md#issues-list) and [merge requests](../project/merge_requests/index.md#merge-requests-per-group) across all projects in that group,
 together in a single list view.
-### Bulk editing issues
-For details, see [bulk editing issues](../group/bulk_editing/index.md).
+### Bulk editing issues and merge requests
+For details, see [bulk editing issues and merge requests](../group/bulk_editing/index.md).
 ## Create a new group

doc/user/project/bulk_editing.md

@@ -13,8 +13,8 @@ by using the bulk editing feature.
 ![Bulk editing](img/bulk-editing.png)
 NOTE: **Note:**
-Bulk editing of merge requests is only available at the project level.
-For more details, see [bulk editing group issues](../group/bulk_editing/index.md).
+Bulk editing issues and merge requests is also available at the group level.
+For more details, see [bulk editing group issues and merge requests](../group/bulk_editing/index.md).
 To update multiple project issues or merge requests at the same time:

spec/services/issuable/bulk_update_service_spec.rb

@@ -16,22 +16,22 @@ describe Issuable::BulkUpdateService do
   shared_examples 'updates milestones' do
     it 'succeeds' do
-      result = bulk_update(issues, milestone_id: milestone.id)
+      result = bulk_update(issuables, milestone_id: milestone.id)
       expect(result[:success]).to be_truthy
-      expect(result[:count]).to eq(issues.count)
+      expect(result[:count]).to eq(issuables.count)
     end
-    it 'updates the issues milestone' do
-      bulk_update(issues, milestone_id: milestone.id)
-      issues.each do |issue|
-        expect(issue.reload.milestone).to eq(milestone)
+    it 'updates the issuables milestone' do
+      bulk_update(issuables, milestone_id: milestone.id)
+      issuables.each do |issuable|
+        expect(issuable.reload.milestone).to eq(milestone)
       end
     end
   end
-  context 'with project issues' do
+  context 'with project issuables' do
     describe 'close issues' do
       let(:issues) { create_list(:issue, 2, project: project) }
@@ -171,7 +171,7 @@ describe Issuable::BulkUpdateService do
     end
     describe 'updating milestones' do
-      let(:issues)    { [create(:issue, project: project)] }
+      let(:issuables) { [create(:issue, project: project)] }
       let(:milestone) { create(:milestone, project: project) }
       it_behaves_like 'updates milestones'
@@ -360,22 +360,32 @@ describe Issuable::BulkUpdateService do
     end
   end
-  context 'with group issues' do
+  context 'with group issuables ' do
     let(:group) { create(:group) }
-    context 'updating milestone' do
+    describe 'updating milestones' do
       let(:milestone) { create(:milestone, group: group) }
-      let(:project1)  { create(:project, :repository, group: group) }
-      let(:project2)  { create(:project, :repository, group: group) }
-      let(:issue1)    { create(:issue, project: project1) }
-      let(:issue2)    { create(:issue, project: project2) }
-      let(:issues)    { [issue1, issue2] }
+      let(:project)   { create(:project, :repository, group: group) }
       before do
         group.add_maintainer(user)
       end
-      it_behaves_like 'updates milestones'
+      context 'when issues' do
+        let(:issue1)    { create(:issue, project: project) }
+        let(:issue2)    { create(:issue, project: project) }
+        let(:issuables) { [issue1, issue2] }
+
+        it_behaves_like 'updates milestones'
+      end
+
+      context 'when merge requests' do
+        let(:merge_request1) { create(:merge_request, source_project: project, source_branch: 'branch-1') }
+        let(:merge_request2) { create(:merge_request, source_project: project, source_branch: 'branch-2') }
+        let(:issuables)      { [merge_request1, merge_request2] }
+
+        it_behaves_like 'updates milestones'
+      end
     end
   end
 end