function woocommerce_external_add_to_cart() {
		global $product;

		if ( ! $product->add_to_cart_url() ) {
			return;
		}

		wc_get_template(
			'single-product/add-to-cart/external.php',
			array(
				'product_url' => $product->add_to_cart_url(),
				'button_text' => $product->single_add_to_cart_text(),
			)
		);
	}