Execute pipeline hooks asynchronously

app/models/ci/pipeline.rb

@@ -3,6 +3,7 @@ module Ci
     extend Ci::Model
     include HasStatus
     include Importable
+    include AfterCommitQueue
 
     self.table_name = 'ci_commits'
 
@@ -71,7 +72,11 @@ module Ci
       end
 
       after_transition do |pipeline, transition|
-        pipeline.execute_hooks unless transition.loopback?
+        next if transition.loopback?
+
+        pipeline.run_after_commit do
+          PipelineHooksWorker.perform_async(id)
+        end
       end
     end
 

app/workers/pipeline_hooks_worker.rb

+class PipelineHooksWorker
+  include Sidekiq::Worker
+  sidekiq_options queue: :default
+
+  def perform(pipeline_id)
+    Ci::Pipeline.find_by(id: pipeline_id)
+      .try(:execute_hooks)
+  end
+end

spec/workers/pipeline_hooks_worker_spec.rb

+require 'spec_helper'
+
+describe PipelineHooksWorker do
+  describe '#perform' do
+    context 'when pipeline exists' do
+      let(:pipeline) { create(:ci_pipeline) }
+
+      it 'executes hooks for the pipeline' do
+        expect_any_instance_of(Ci::Pipeline)
+          .to receive(:execute_hooks)
+
+        described_class.new.perform(pipeline.id)
+      end
+    end
+
+    context 'when pipeline does not exist' do
+      it 'does not raise exception' do
+        expect { described_class.new.perform(123) }
+          .not_to raise_error
+      end
+    end
+  end
+end