# File lib/bundler/source.rb, line 77
      def install(spec)
        path = cached_gem(spec)

        if installed_specs[spec].any?
          Bundler.ui.info "Using #{spec.name} (#{spec.version}) "
          return
        end

        Bundler.ui.info "Installing #{spec.name} (#{spec.version}) "

        install_path = Bundler.requires_sudo? ? Bundler.tmp : Gem.dir
        options = { :install_dir         => install_path,
                    :ignore_dependencies => true,
                    :wrappers            => true,
                    :env_shebang         => true }
        options.merge!(:bin_dir => "#{install_path}/bin") unless spec.executables.nil? || spec.executables.empty?

        installer = Gem::Installer.new path, options
        installer.install

        # SUDO HAX
        if Bundler.requires_sudo?
          sudo "mkdir -p #{Gem.dir}/gems #{Gem.dir}/specifications"
          sudo "cp -R #{Bundler.tmp}/gems/#{spec.full_name} #{Gem.dir}/gems/"
          sudo "cp -R #{Bundler.tmp}/specifications/#{spec.full_name}.gemspec #{Gem.dir}/specifications/"
          spec.executables.each do |exe|
            sudo "mkdir -p #{Gem.bindir}"
            sudo "cp -R #{Bundler.tmp}/bin/#{exe} #{Gem.bindir}"
          end
        end

        spec.loaded_from = "#{Gem.dir}/specifications/#{spec.full_name}.gemspec"
      end