Merge branch 'no-gc-retry' into 'master'

Do not retry "git gc"

To prevent 'git gc' timing out on a large repo and then bouncing
around in the retry queue.

See merge request !3266

app/services/projects/housekeeping_service.rb

@@ -24,7 +24,7 @@ module Projects
     def execute
       raise LeaseTaken if !try_obtain_lease
 
-      GitlabShellWorker.perform_async(:gc, @project.path_with_namespace)
+      GitlabShellOneShotWorker.perform_async(:gc, @project.path_with_namespace)
     ensure
       @project.update_column(:pushes_since_gc, 0)
     end

app/workers/gitlab_shell_one_shot_worker.rb

+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

spec/services/projects/housekeeping_service_spec.rb

@@ -12,7 +12,7 @@ describe Projects::HousekeepingService do
 
     it 'enqueues a sidekiq job' do
       expect(subject).to receive(:try_obtain_lease).and_return(true)
-      expect(GitlabShellWorker).to receive(:perform_async).with(:gc, project.path_with_namespace)
+      expect(GitlabShellOneShotWorker).to receive(:perform_async).with(:gc, project.path_with_namespace)
 
       subject.execute
       expect(project.pushes_since_gc).to eq(0)
@@ -20,7 +20,7 @@ describe Projects::HousekeepingService do
 
     it 'does not enqueue a job when no lease can be obtained' do
       expect(subject).to receive(:try_obtain_lease).and_return(false)
-      expect(GitlabShellWorker).not_to receive(:perform_async)
+      expect(GitlabShellOneShotWorker).not_to receive(:perform_async)
 
       expect { subject.execute }.to raise_error(Projects::HousekeepingService::LeaseTaken)
       expect(project.pushes_since_gc).to eq(0)