Fix haml lints

- Remove interpolation from translated string
- Update PO file
- Prettify index.js

ee/app/controllers/groups/merge_requests_controller.rb

+# frozen_string_literal: true
+
+class Groups::MergeRequestsController < Groups::BulkUpdateController
+end

ee/app/policies/ee/group_policy.rb

@@ -97,6 +97,7 @@ module EE
 
       rule { developer }.policy do
         enable :read_group_security_dashboard
+        enable :admin_merge_request
       end
 
       rule { security_dashboard_feature_disabled }.policy do

ee/app/views/shared/issuable/_bulk_update_button.html.haml

-= button_tag _('Edit issues'), class: 'btn btn-default append-right-10 js-bulk-update-toggle'
+- type = local_assigns.fetch(:type)
+
+= button_tag _("Edit %{issuable}") % {issuable: type.to_s.humanize(capitalize: false)}, class: 'btn btn-default append-right-10 js-bulk-update-toggle'

ee/changelogs/unreleased/12719-group-bulk-edit-merge-requests-change-milestone.yml

+---
+title: Allow bulk editing group merge request milestones
+merge_request: 14616
+author:
+type: added

ee/config/routes/group.rb

@@ -78,6 +78,12 @@ constraints(::Constraints::GroupUrlConstrainer.new) do
       end
     end
 
+    resources :merge_requests, only: [] do
+      collection do
+        post :bulk_update
+      end
+    end
+
     resources :todos, only: [:create]
     resources :boards, only: [:create, :update, :destroy] do
       collection do

ee/spec/controllers/groups/merge_requests_controller_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Groups::MergeRequestsController do
+  let(:user)           { create(:user) }
+  let(:group)          { create(:group, :public) }
+  let(:project)        { create(:project, :repository, group: group) }
+  let(:milestone)      { create(:milestone, group: group) }
+  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') }
+
+  describe 'POST #bulk_update' do
+    subject { post :bulk_update, params: params, format: :json }
+
+    let(:params) do
+      {
+        update: {
+          milestone_id: milestone.id,
+          issuable_ids: "#{merge_request1.id}, #{merge_request2.id}"
+        },
+        group_id: group
+      }
+    end
+
+    before do
+      sign_in(user)
+    end
+
+    context 'when group bulk edit feature is not enabled' do
+      before do
+        stub_licensed_features(group_bulk_edit: false)
+      end
+
+      it 'returns 404 status' do
+        subject
+
+        expect(response).to have_gitlab_http_status(404)
+      end
+    end
+
+    context 'when group bulk edit feature is enabled' do
+      before do
+        stub_licensed_features(group_bulk_edit: true)
+      end
+
+      context 'when user has permissions to bulk update merge requests' do
+        before do
+          group.add_developer(user)
+        end
+
+        it 'returns status 200' do
+          subject
+
+          expect(response.status).to eq(200)
+        end
+
+        it 'updates merge requests milestone' do
+          expect { subject }
+            .to change { merge_request1.reload.milestone }.from(nil).to(milestone)
+            .and change { merge_request2.reload.milestone }.from(nil).to(milestone)
+        end
+      end
+
+      context 'when user does not have permissions to bulk update merge requests' do
+        before do
+          group.add_reporter(user)
+        end
+
+        it 'returns status 404' do
+          subject
+
+          expect(response.status).to eq(404)
+        end
+
+        it 'does not update merge requests milestone' do
+          expect { subject }
+            .to not_change { merge_request1.reload.milestone }
+            .and not_change { merge_request2.reload.milestone }
+        end
+      end
+    end
+  end
+end

ee/spec/routing/group_routing_spec.rb

@@ -88,4 +88,12 @@ describe 'Group routing', "routing" do
       expect(post('/groups/gitlabhq/-/issues/bulk_update')).to route_to('groups/issues#bulk_update', group_id: 'gitlabhq')
     end
   end
+
+  describe 'merge_requests' do
+    it 'routes post to #bulk_update' do
+      allow(Group).to receive(:find_by_full_path).with('gitlabhq', any_args).and_return(true)
+
+      expect(post('/groups/gitlabhq/-/merge_requests/bulk_update')).to route_to('groups/merge_requests#bulk_update', group_id: 'gitlabhq')
+    end
+  end
 end

locale/gitlab.pot

@@ -4797,6 +4797,9 @@ msgstr ""
 msgid "Edit"
 msgstr ""
 
+msgid "Edit %{issuable}"
+msgstr ""
+
 msgid "Edit %{name}"
 msgstr ""