Support rm src branch on merge w/ push option

MergeRequests::PushOptionsHandlerService has been updated to allow
creating and updating merge requests with the
`remove_source_branch` set using git push options.

To create a new merge request and set it to remove the source branch
when it is merged:

  git push -u origin -o merge_request.create \
    -o merge_request.remove_source_branch

To update an existing merge request and set it to remove the source
branch when it is merged:

  git push -u origin -o merge_request.remove_source_branch

Issue https://gitlab.com/gitlab-org/gitlab-ce/issues/64320

1 files changed, 6 insertions, 1 deletions

diff --git a/lib/gitlab/push_options.rb b/lib/gitlab/push_options.rb
index 3137676ba4b..b96590af08e 100644
--- a/lib/gitlab/push_options.rb
+++ b/lib/gitlab/push_options.rb
@@ -4,7 +4,12 @@ module Gitlab
   class PushOptions
     VALID_OPTIONS = HashWithIndifferentAccess.new({
       merge_request: {
-        keys: [:create, :merge_when_pipeline_succeeds, :target]
+        keys: [
+          :create,
+          :merge_when_pipeline_succeeds,
+          :remove_source_branch,
+          :target
+        ]
       },
       ci: {
         keys: [:skip]