class Gem::RequestSet

def install_hooks(requests, options)
  specs = requests.map do |request|
    case request
    when Gem::Resolver::ActivationRequest then
      request.spec.spec
    else
      request
    end
  end
  require_relative "dependency_installer"
  inst = Gem::DependencyInstaller.new options
  inst.installed_gems.replace specs
  Gem.done_installing_hooks.each do |hook|
    hook.call inst, specs
  end unless Gem.done_installing_hooks.empty?
end