Expose head pipeline in the related merge requests

Expose head pipeline for the MR in the api when requesting
related merge requests for an issue and show a detailed
status for the pipeline, which would include:
details_path, favicon, group, icon, label, text, tooltip.

https://gitlab.com/gitlab-org/gitlab-ce/issues/57662#note_152023412

1 files changed, 9 insertions, 0 deletions

diff --git a/lib/api/entities.rb b/lib/api/entities.rb
index cc62b5a3661..2dd3120d3fc 100644
--- a/lib/api/entities.rb
+++ b/lib/api/entities.rb
@@ -690,6 +690,10 @@ module API
       # Deprecated
       expose :allow_collaboration, as: :allow_maintainer_to_push, if: -> (merge_request, _) { merge_request.for_fork? }
 
+      expose :reference do |merge_request, options|
+        merge_request.to_reference(options[:project])
+      end
+
       expose :web_url do |merge_request|
         Gitlab::UrlBuilder.build(merge_request)
       end
@@ -726,6 +730,8 @@ module API
         merge_request.metrics&.pipeline
       end
 
+      expose :head_pipeline, using: 'API::Entities::Pipeline'
+
       expose :diff_refs, using: Entities::DiffRefs
 
       # Allow the status of a rebase to be determined
@@ -1267,6 +1273,9 @@ module API
       expose :created_at, :updated_at, :started_at, :finished_at, :committed_at
       expose :duration
       expose :coverage
+      expose :detailed_status, using: DetailedStatusEntity do |pipeline, options|
+        pipeline.detailed_status(options[:current_user])
+      end
     end
 
     class PipelineSchedule < Grape::Entity