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, 16 insertions, 0 deletions

diff --git a/app/views/shared/issuable/form/_merge_params.html.haml b/app/views/shared/issuable/form/_merge_params.html.haml
new file mode 100644
index 00000000000..03309722326
--- /dev/null
+++ b/app/views/shared/issuable/form/_merge_params.html.haml
@@ -0,0 +1,16 @@
+- issuable = local_assigns.fetch(:issuable)
+
+- return unless issuable.is_a?(MergeRequest)
+- return if issuable.closed_without_fork?
+
+-# This check is duplicated below, to avoid conflicts with EE.
+- return unless issuable.can_remove_source_branch?(current_user)
+
+.form-group
+  .col-sm-10.col-sm-offset-2
+    - if issuable.can_remove_source_branch?(current_user)
+      .checkbox
+        = label_tag 'merge_request[force_remove_source_branch]' do
+          = hidden_field_tag 'merge_request[force_remove_source_branch]', '0', id: nil
+          = check_box_tag 'merge_request[force_remove_source_branch]', '1', issuable.force_remove_source_branch?
+          Remove source branch when merge request is accepted.