Backport changes from EE squash

Backport changes from the EE-only squash implementation, which would
otherwise conflict when merge CE into EE.

<https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/1024>

1 files changed, 12 insertions, 0 deletions

diff --git a/app/helpers/merge_requests_helper.rb b/app/helpers/merge_requests_helper.rb
index 8c2c4e8833b..83ff898e68a 100644
--- a/app/helpers/merge_requests_helper.rb
+++ b/app/helpers/merge_requests_helper.rb
@@ -143,4 +143,16 @@ module MergeRequestsHelper
   def different_base?(version1, version2)
     version1 && version2 && version1.base_commit_sha != version2.base_commit_sha
   end
+
+  def merge_params(merge_request)
+    {
+      merge_when_build_succeeds: true,
+      should_remove_source_branch: true,
+      sha: merge_request.diff_head_sha
+    }.merge(merge_params_ee(merge_request))
+  end
+
+  def merge_params_ee(merge_request)
+    {}
+  end
 end