Perform CI build hooks asynchronously using worker

app/models/ci/build.rb

 module Ci
   class Build < CommitStatus
     include TokenAuthenticatable
+    include AfterCommitQueue
 
     belongs_to :runner, class_name: 'Ci::Runner'
     belongs_to :trigger_request, class_name: 'Ci::TriggerRequest'
@@ -75,12 +76,12 @@ module Ci
 
     state_machine :status do
       after_transition pending: :running do |build|
-        build.execute_hooks
+        build.run_after_commit { BuildHooksWorker.perform_async(id) }
       end
 
       after_transition any => [:success, :failed, :canceled] do |build|
         build.update_coverage
-        build.execute_hooks
+        build.run_after_commit { BuildHooksWorker.perform_async(id) }
       end
 
       after_transition any => [:success] do |build|

app/workers/build_hooks_worker.rb

+class BuildHooksWorker
+  include Sidekiq::Worker
+  sidekiq_options queue: :default
+
+  def perform(build_id)
+    Ci::Build.find_by(id: build_id)
+      .try(:execute_hooks)
+  end
+end

spec/workers/build_hooks_worker_spec.rb

+require 'spec_helper'
+
+describe BuildHooksWorker do
+  describe '#perform' do
+    context 'when build exists' do
+      let!(:build) { create(:ci_build) }
+
+      it 'calls build hooks' do
+        expect_any_instance_of(Ci::Build)
+          .to receive(:execute_hooks)
+
+        described_class.new.perform(build.id)
+      end
+    end
+
+    context 'when build does not exist' do
+      it 'does not raise exception' do
+        expect { described_class.new.perform(123) }
+          .not_to raise_error
+      end
+    end
+  end
+end