Get ci_commit in MR controller

app/controllers/projects/merge_requests_controller.rb

@@ -264,6 +264,8 @@ class Projects::MergeRequestsController < Projects::ApplicationController
     @merge_request_diff = @merge_request.merge_request_diff
+    @ci_commit = @merge_request.ci_commit
+
     if @merge_request.locked_long_ago?
       @merge_request.unlock_mr
       @merge_request.close

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

-- ci_commit = @merge_request.ci_commit
-- if ci_commit
-  - status = ci_commit.status
+- if @ci_commit
+  - status = @ci_commit.status
   .mr-widget-heading
     .ci_widget{class: "ci-#{status}"}
-      = ci_status_icon(ci_commit)
+      = ci_status_icon(@ci_commit)
       %span CI build #{status}
       for #{@merge_request.last_commit_short_sha}.
       %span.ci-coverage
-      = link_to "View build details", ci_status_path(ci_commit)
+      = link_to "View build details", ci_status_path(@ci_commit)
 - elsif @merge_request.has_ci?
   - # Compatibility with old CI integrations (ex jenkins) when you request status from CI server via AJAX

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

-- status_class = @merge_request.ci_commit ? " ci-#{@merge_request.ci_commit.status}" : nil
+- status_class = @ci_commit ? " ci-#{@ci_commit.status}" : nil
 = form_for [:merge, @project.namespace.becomes(Namespace), @project, @merge_request], remote: true, method: :post, html: { class: 'accept-mr-form js-requires-input' } do |f|
   = hidden_field_tag :authenticity_token, form_authenticity_token