Add ability to render different merge request versions

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/app/models/merge_request_diff.rb b/app/models/merge_request_diff.rb
index 3f520c8f3ff..a92f597225a 100644
--- a/app/models/merge_request_diff.rb
+++ b/app/models/merge_request_diff.rb
@@ -96,6 +96,16 @@ class MergeRequestDiff < ActiveRecord::Base
       end
   end
 
+  def diff_refs
+    return unless start_commit || base_commit
+
+    Gitlab::Diff::DiffRefs.new(
+      base_sha:  base_commit_sha,
+      start_sha: start_commit_sha,
+      head_sha:  head_commit_sha
+    )
+  end
+
   private
 
   # Collect array of Git::Commit objects