Page is not reloaded periodically to check if rebase is finished

CHANGELOG-EE

 v 8.2.0
   - Invalidate stored jira password if the endpoint URL is changed
+  - Fix: Page is not reloaded periodically to check if rebase is finished
 
 v 8.1.0 (unreleased)
   - added an issues template (Hannes Rosenögger)

app/assets/javascripts/merge_request_widget.js.coffee

@@ -23,6 +23,18 @@ class @MergeRequestWidget
           setTimeout(merge_request_widget.mergeInProgress, 2000)
       dataType: 'json'
 
+  rebaseInProgress: ->
+    $.ajax
+      type: 'GET'
+      url: $('.merge-request').data('url')
+      success: (data) =>
+        debugger
+        if data["rebase_in_progress?"]
+          setTimeout(merge_request_widget.rebaseInProgress, 2000)
+        else
+          location.reload()
+      dataType: 'json'
+
   getMergeStatus: ->
     $.get @opts.url_to_automerge_check, (data) ->
       $('.mr-state-widget').replaceWith(data)

app/controllers/projects/merge_requests_controller.rb

@@ -48,7 +48,7 @@ class Projects::MergeRequestsController < Projects::ApplicationController
 
     respond_to do |format|
       format.html
-      format.json { render json: @merge_request }
+      format.json { render json: @merge_request, methods: :rebase_in_progress? }
       format.diff { render text: @merge_request.to_diff(current_user) }
       format.patch { render text: @merge_request.to_patch(current_user) }
     end
@@ -241,8 +241,6 @@ class Projects::MergeRequestsController < Projects::ApplicationController
     return render_404 unless @merge_request.approved?
 
     RebaseWorker.perform_async(@merge_request.id, current_user.id)
-
-    redirect_to merge_request_path(@merge_request), notice: 'Rebase started. It will take some time'
   end
 
   protected

app/views/projects/merge_requests/rebase.js.haml

+:plain
+  $('.mr-widget-body').html("#{escape_javascript(render('projects/merge_requests/widget/open/ff_accept'))}")
+  merge_request_widget.rebaseInProgress();

app/views/projects/merge_requests/widget/open/_ff_accept.html.haml

@@ -10,7 +10,7 @@
         Fast-forward merge without creating merge commit
 - else
   = form_for [:rebase, @project.namespace.becomes(Namespace), @project, @merge_request],
-    remote: false, method: :post, html: { class: 'accept-mr-form js-requires-input' } do |f|
+    remote: true, method: :post, html: { class: 'accept-mr-form js-requires-input' } do |f|
     = hidden_field_tag :authenticity_token, form_authenticity_token
     .accept-merge-holder.clearfix.js-toggle-container
       - if @merge_request.target_project.merge_requests_rebase_enabled && can_rebase?(@merge_request.source_project, @merge_request.source_branch)
@@ -32,4 +32,8 @@
   $('.rebase-mr-form').on 'ajax:before', ->
     btn = $('.rebase-mr')
     btn.disable()
-    btn.html("<i class='fa fa-spinner fa-spin'></i> Rebase in progress. It could take some time")
\ No newline at end of file
+    btn.html("<i class='fa fa-spinner fa-spin'></i> Rebase in progress. It could take some time")
+
+  - if #{@merge_request.rebase_in_progress?}
+    $ ->
+      merge_request_widget.rebaseInProgress()

features/project/ff_merge_requests.feature

@@ -11,6 +11,7 @@ Feature: Project Ff Merge Requests
     When I visit merge request page "Bug NS-05"
     Then I should see ff-only merge button
 
+  @javascript
   Scenario: I do rebase before ff-only merge
     Given rebase before merge enabled
     When I visit merge request page "Bug NS-05"

features/steps/project/ff_merge_requests.rb

@@ -73,11 +73,12 @@ class Spinach::Features::ProjectFfMergeRequests < Spinach::FeatureSteps
   end
 
   step 'I press rebase button' do
+    allow(RebaseWorker).to receive(:perform_async){ true }
     click_button "Rebase"
   end
 
   step "I should see rebase in progress message" do
-    expect(page).to have_content("Rebase started. It will take some time")
+    expect(page).to have_content("Rebase in progress")
   end
 
   def merge_request