global

def gemfile(install = false, options = {}, &gemfile)
  require_relative "../bundler"

  opts = options.dup
  ui = opts.delete(:ui) { Bundler::UI::Shell.new }
  ui.level = "silent" if opts.delete(:quiet)
  raise ArgumentError, "Unknown options: #{opts.keys.join(", ")}" unless opts.empty?

  begin
    Bundler.instance_variable_set(:@bundle_path, Pathname.new(Gem.dir))
    old_gemfile = ENV["BUNDLE_GEMFILE"]
    Bundler::SharedHelpers.set_env "BUNDLE_GEMFILE", "Gemfile"

    Bundler::Plugin.gemfile_install(&gemfile) if Bundler.feature_flag.plugins?
    builder = Bundler::Dsl.new
    builder.instance_eval(&gemfile)
    builder.check_primary_source_safety

    Bundler.settings.temporary(:deployment => false, :frozen => false) do
      definition = builder.to_definition(nil, true)
      def definition.lock(*); end
      definition.validate_runtime!

      Bundler.ui = install ? ui : Bundler::UI::Silent.new
      if install || definition.missing_specs?
        Bundler.settings.temporary(:inline => true) do
          installer = Bundler::Installer.install(Bundler.root, definition, :system => true)
          installer.post_install_messages.each do |name, message|
            Bundler.ui.info "Post-install message from #{name}:\n#{message}"
          end
        end
      end

      runtime = Bundler::Runtime.new(nil, definition)
      runtime.setup.require
    end
  ensure
    if old_gemfile
      ENV["BUNDLE_GEMFILE"] = old_gemfile
    else
      ENV["BUNDLE_GEMFILE"] = ""
    end
  end
end