Merge branch 'issue_3583' into 'master'

Ensure "Remove Source Branch" button is not shown when branch is being deleted.

Given the merging of the Merge Request happens in the background, sometimes when the client JS code reloads the page the source branch is not still gone.

This fix appends a new query string parameter that is checked in the view before rendering the `Remove Source Branch` button.

Closes #3583

See merge request !1897

CHANGELOG

@@ -10,6 +10,7 @@ v 8.3.0 (unreleased)
   - Don't show project fork event as "imported"
   - Add API endpoint to fetch merge request commits list
   - Expose events API with comment information and author info
+  - Fix: Ensure "Remove Source Branch" button is not shown when branch is being deleted. #3583
 
 v 8.2.2
   - Fix 404 in redirection after removing a project (Stan Hu)

app/assets/javascripts/merge_request_widget.js.coffee

@@ -10,17 +10,20 @@ class @MergeRequestWidget
   constructor: (@opts) ->
     modal = $('#modal_merge_info').modal(show: false)
 
-  mergeInProgress: ->
+  mergeInProgress: (deleteSourceBranch = false)->
     $.ajax
       type: 'GET'
       url: $('.merge-request').data('url')
       success: (data) =>
         if data.state == "merged"
-          location.reload()
+          urlSuffix = if deleteSourceBranch then '?delete_source=true' else ''
+
+          window.location.href = window.location.href + urlSuffix
         else if data.merge_error
           $('.mr-widget-body').html("<h4>" + data.merge_error + "</h4>")
         else
-          setTimeout(merge_request_widget.mergeInProgress, 2000)
+          callback = -> merge_request_widget.mergeInProgress(deleteSourceBranch)
+          setTimeout(callback, 2000)
       dataType: 'json'
 
   getMergeStatus: ->

app/helpers/gitlab_routing_helper.rb

@@ -6,7 +6,7 @@
 #
 # For example instead of this:
 #
-#   namespace_project_merge_request_path(merge_request.project.namespace, merge_request.projects, merge_request)
+#   namespace_project_merge_request_path(merge_request.project.namespace, merge_request.project, merge_request)
 #
 # We can simply use shortcut:
 #

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

 - if @status
   :plain
-    merge_request_widget.mergeInProgress();
+    merge_request_widget.mergeInProgress(#{params[:should_remove_source_branch] == '1'});
 - else
   :plain
     $('.mr-widget-body').html("#{escape_javascript(render('projects/merge_requests/widget/open/reload'))}");

app/views/projects/merge_requests/widget/_merged.html.haml

@@ -7,7 +7,7 @@
         by #{link_to_member(@project, @merge_request.merge_event.author, avatar: true)}
         #{time_ago_with_tooltip(@merge_request.merge_event.created_at)}
     %div
-      - if !@merge_request.source_branch_exists?
+      - if !@merge_request.source_branch_exists? || (params[:delete_source] == 'true')
         = succeed '.' do
           The changes were merged into
           = link_to namespace_project_commits_path(@project.namespace, @project, @merge_request.target_branch), class: "label-branch" do

features/project/merge_requests/accept.feature

+Feature: Project Merge Requests Acceptance
+  Background:
+    Given There is an open Merge Request
+      And I am signed in as a developer of the project
+
+  @javascript
+  Scenario: Accepting the Merge Request and removing the source branch
+    Given I am on the Merge Request detail page
+    When I click on "Remove source branch" option
+    And I click on Accept Merge Request
+    Then I should not see the Remove Source Branch button
+
+  @javascript
+  Scenario: Accepting the Merge Request without removing the source branch
+    Given I am on the Merge Request detail page
+    When I click on Accept Merge Request
+    Then I should see the Remove Source Branch button

features/steps/project/merge_requests/acceptance.rb

+class Spinach::Features::ProjectMergeRequestsAcceptance < Spinach::FeatureSteps
+  include LoginHelpers
+  include GitlabRoutingHelper
+
+  step 'I am on the Merge Request detail page' do
+    visit merge_request_path(@merge_request)
+  end
+
+  step 'I click on "Remove source branch" option' do
+    check('Remove source branch')
+  end
+
+  step 'I click on Accept Merge Request' do
+    click_button('Accept Merge Request')
+  end
+
+  step 'I should see the Remove Source Branch button' do
+    expect(page).to have_link('Remove Source Branch')
+  end
+
+  step 'I should not see the Remove Source Branch button' do
+    expect(page).not_to have_link('Remove Source Branch')
+  end
+
+  step 'There is an open Merge Request' do
+    @user = create(:user)
+    @project = create(:project, :public)
+    @project_member = create(:project_member, user: @user, project: @project, access_level: ProjectMember::DEVELOPER)
+    @merge_request = create(:merge_request, :with_diffs, :simple, source_project: @project)
+  end
+
+  step 'I am signed in as a developer of the project' do
+    login_as(@user)
+  end
+end