1 files changed, 44 insertions, 0 deletions
diff --git a/lib/api/v3/merge_request_diffs.rb b/lib/api/v3/merge_request_diffs.rb
new file mode 100644
index 00000000000..35f462e907b
--- /dev/null
+++ b/lib/api/v3/merge_request_diffs.rb
@@ -0,0 +1,44 @@
+module API
+  module V3
+    # MergeRequestDiff API
+    class MergeRequestDiffs < Grape::API
+      before { authenticate! }
+
+      params do
+        requires :id, type: String, desc: 'The ID of a project'
+      end
+      resource :projects, requirements: { id: %r{[^/]+} } do
+        desc 'Get a list of merge request diff versions' do
+          detail 'This feature was introduced in GitLab 8.12.'
+          success ::API::Entities::MergeRequestDiff
+        end
+
+        params do
+          requires :merge_request_id, type: Integer, desc: 'The ID of a merge request'
+        end
+
+        get ":id/merge_requests/:merge_request_id/versions" do
+          merge_request = find_merge_request_with_access(params[:merge_request_id])
+
+          present merge_request.merge_request_diffs, with: ::API::Entities::MergeRequestDiff
+        end
+
+        desc 'Get a single merge request diff version' do
+          detail 'This feature was introduced in GitLab 8.12.'
+          success ::API::Entities::MergeRequestDiffFull
+        end
+
+        params do
+          requires :merge_request_id, type: Integer, desc: 'The ID of a merge request'
+          requires :version_id, type: Integer, desc: 'The ID of a merge request diff version'
+        end
+
+        get ":id/merge_requests/:merge_request_id/versions/:version_id" do
+          merge_request = find_merge_request_with_access(params[:merge_request_id])
+
+          present merge_request.merge_request_diffs.find(params[:version_id]), with: ::API::Entities::MergeRequestDiffFull
+        end
+      end
+    end
+  end
+end