gitlab-org--gitlab-foss/app/services/git_tag_push_service.rb

class GitTagPushService
  attr_accessor :project, :user, :push_data

  def execute(project, user, oldrev, newrev, ref)
    @project, @user = project, user
    @push_data = create_push_data(oldrev, newrev, ref)

    create_push_event
    project.repository.expire_cache
    project.execute_hooks(@push_data.dup, :tag_push_hooks)

    if project.gitlab_ci?
      project.gitlab_ci_service.async_execute(@push_data)
    end

    true
  end

  private

  def create_push_data(oldrev, newrev, ref)
    Gitlab::PushDataBuilder.
      build(project, user, oldrev, newrev, ref, [])
  end

  def create_push_event
    Event.create!(
      project: project,
      action: Event::PUSHED,
      data: push_data,
      author_id: push_data[:user_id]
    )
  end
end