Expire the branch cache after `git gc` runs

Due to a stale NFS cache, it's possible that a branch lookup fails
while `git gc` is running and causes missing branches in merge requests.

Possible workaround for #15392

2 files changed, 14 insertions, 10 deletions

diff --git a/app/workers/git_garbage_collect_worker.rb b/app/workers/git_garbage_collect_worker.rb
new file mode 100644
index 00000000000..2fa3c838f55
--- /dev/null
+++ b/app/workers/git_garbage_collect_worker.rb
@@ -0,0 +1,14 @@
+class GitGarbageCollectWorker
+  include Sidekiq::Worker
+  include Gitlab::ShellAdapter
+
+  sidekiq_options queue: :gitlab_shell, retry: false
+
+  def perform(project_id)
+    project = Project.find(project_id)
+
+    gitlab_shell.gc(project.repository_storage_path, project.path_with_namespace)
+    # Expire the branch cache in case garbage collection caused a ref lookup to fail
+    project.repository.after_create_branch
+  end
+end
diff --git a/app/workers/gitlab_shell_one_shot_worker.rb b/app/workers/gitlab_shell_one_shot_worker.rb
deleted file mode 100644
index 4ddbcf574d5..00000000000
--- a/app/workers/gitlab_shell_one_shot_worker.rb
+++ /dev/null
@@ -1,10 +0,0 @@
-class GitlabShellOneShotWorker
-  include Sidekiq::Worker
-  include Gitlab::ShellAdapter
-
-  sidekiq_options queue: :gitlab_shell, retry: false
-
-  def perform(action, *arg)
-    gitlab_shell.send(action, *arg)
-  end
-end