Issue #3306864 by lauriii, mherchel, alexpott: Integrate Twig with Symfony... (07994b06) · Commits · project / drupal

core/core.services.yml

+9 −3

Original line number	Diff line number	Diff line
		@@ -1536,12 +1536,18 @@ services:
		arguments: ['@renderer', '@url_generator', '@theme.manager', '@date.formatter', '@file_url_generator']
		tags:
		- { name: twig.extension, priority: 100 }
		# @todo Figure out what to do about debugging functions.
		# @see https://www.drupal.org/node/1804998
		twig.extension.debug:
		class: Twig\Extension\DebugExtension
		tags:
		- { name: twig.extension }
		- { name: twig.extension, priority: 50 }
		twig.extension.varDumper:
		class: Drupal\Core\Template\DebugExtension
		tags:
		# This extension is loaded after the Twig Debug Extension because for Twig
		# Extensions, last extension loaded takes precedent. This allows this
		# extension to override the default Twig Debug Extension conditionally
		# when Symfony VarDumper is available.
		- { name: twig.extension, priority: 25 }
		twig.loader:
		class: Twig\Loader\ChainLoader
		public: false

core/lib/Drupal/Core/Template/DebugExtension.php

0 → 100644

+68 −0

Original line number	Diff line number	Diff line
		<?php

		namespace Drupal\Core\Template;

		use Twig\Environment;
		use Twig\Extension\AbstractExtension;
		use Twig\TwigFunction;

		/**
		* A class providing Drupal Twig Debug extension.
		*/
		final class DebugExtension extends AbstractExtension {

		/**
		* The Symfony VarDumper class.
		*
		* Defined as a string because the Symfony VarDumper does not always exist.
		*
		* @type string
		*/
		private const SYMFONY_VAR_DUMPER_CLASS = '\Symfony\Component\VarDumper\VarDumper';

		/**
		* {@inheritdoc}
		*/
		public function getFunctions(): array {
		// Override Twig built in debugger when Symfony VarDumper is available to
		// improve developer experience.
		// @see \Twig\Extension\DebugExtension
		// @see \Symfony\Component\VarDumper\VarDumper
		if (class_exists(self::SYMFONY_VAR_DUMPER_CLASS)) {
		return [
		new TwigFunction('dump', [self::class, 'dump'], ['needs_context' => TRUE, 'needs_environment' => TRUE, 'is_variadic' => TRUE]),
		];
		}

		return [];
		}

		/**
		* Dumps information about variables using Symfony VarDumper.
		*
		* @param \Twig\Environment $env
		* The Twig environment.
		* @param array $context
		* Variables from the Twig template.
		* @param array $variables
		* (optional) Variable(s) to dump.
		*/
		public static function dump(Environment $env, array $context, ...$variables): void {
		if (!$env->isDebug()) {
		return;
		}

		if (class_exists(self::SYMFONY_VAR_DUMPER_CLASS)) {
		if (func_num_args() === 2) {
		call_user_func(self::SYMFONY_VAR_DUMPER_CLASS . '::dump', $context);
		}
		else {
		array_walk($variables, self::SYMFONY_VAR_DUMPER_CLASS . '::dump');
		}
		}
		else {
		throw new \LogicException('Could not dump the variable because symfony/var-dumper component is not installed.');
		}
		}

		}

core/modules/system/tests/modules/twig_theme_test/src/TwigThemeTestController.php

+7 −0

Original line number	Diff line number	Diff line
		@@ -111,4 +111,11 @@ public function embedTagRender() {
		return ['#theme' => 'twig_theme_test_embed_tag'];
		}

		/**
		* Renders for testing drupal_dump function.
		*/
		public function dump() {
		return ['#theme' => 'twig_theme_test_dump'];
		}

		}

core/modules/system/tests/modules/twig_theme_test/templates/twig_theme_test.dump.html.twig

0 → 100644

+6 −0

Original line number	Diff line number	Diff line
		{% set foo = '💩' %}
		{% set bar = '🐣' %}
		{% set baz = '☄️' %}
		{{ dump(foo) }}
		{{ dump() }}
		{{ dump(foo, baz) }}

core/modules/system/tests/modules/twig_theme_test/twig_theme_test.module

+4 −0

Original line number	Diff line number	Diff line
		@@ -77,6 +77,10 @@ function twig_theme_test_theme($existing, $type, $theme, $path) {
		'variables' => [],
		'template' => 'twig_theme_test.embed_tag',
		];
		$items['twig_theme_test_dump'] = [
		'variables' => [],
		'template' => 'twig_theme_test.dump',
		];
		return $items;
		}