Move merge params to their own partial

app/views/shared/issuable/_form.html.haml

@@ -45,6 +45,8 @@
 
 = render 'shared/issuable/form/branch_chooser', issuable: issuable, form: form
 
+= render 'shared/issuable/form/merge_params', issuable: issuable
+
 - if @merge_request_for_resolving_discussions
   .form-group
     .col-sm-10.col-sm-offset-2

app/views/shared/issuable/form/_branch_chooser.html.haml

@@ -19,19 +19,3 @@
     - if issuable.new_record?
        
       = link_to 'Change branches', mr_change_branches_path(issuable)
-
-.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.
-
-    - if issuable.new_record?
-      .checkbox
-        = label_tag 'merge_request[squash]' do
-          = check_box_tag 'merge_request[squash]', nil
-          Squash commits when merge request is accepted.
-          = link_to 'Learn more', help_page_path('user/project/merge_requests/squash_before_merge')

app/views/shared/issuable/form/_merge_params.html.haml

+- issuable = local_assigns.fetch(:issuable)
+
+- return unless issuable.is_a?(MergeRequest)
+- return if issuable.closed_without_fork?
+
+.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.
+
+    .checkbox
+      = label_tag 'merge_request[squash]' do
+        = hidden_field_tag 'merge_request[squash]', '0', id: nil
+        = check_box_tag 'merge_request[squash]', '1', issuable.squash
+        Squash commits when merge request is accepted.
+        = link_to 'Learn more', help_page_path('user/project/merge_requests/squash_before_merge')