Ref #46: Set up Twig environment explicitly

Author: Chi-teck

src/ApplicationFactory.php

@@ -44,12 +44,7 @@ public static function create() {
     $helper_set = new HelperSet([
       new QuestionHelper(),
       new Dumper(new Filesystem()),
-      // We cannot reference the TwigEnvironment class with use statement
-      // because of a PHP bug.
-      // @see https://bugs.php.net/bug.php?id=66773
-      // @codingStandardsIgnoreStart
-      new Renderer(new \DrupalCodeGenerator\Twig\TwigEnvironment(new \Twig_Loader_Filesystem())),
-      // @codingStandardsIgnoreEnd
+      new Renderer(dcg_get_twig_environment(new \Twig_Loader_Filesystem())),
       new InputHandler(),
       new OutputHandler(),
     ]);

src/bootstrap.php

@@ -6,6 +6,8 @@
  */
 
 use DrupalCodeGenerator\ApplicationFactory;
+use DrupalCodeGenerator\Twig\Twig1Environment;
+use DrupalCodeGenerator\Twig\Twig2Environment;
 use Twig\Environment;
 
 /**
@@ -31,6 +33,25 @@ function dcg_create_application() {
   return ApplicationFactory::create();
 }
 
+/**
+ * Creates an Twig environment.
+ */
+function dcg_get_twig_environment($loader) {
+  switch (Environment::MAJOR_VERSION) {
+    case 1:
+      $environment = new Twig1Environment($loader);
+      break;
+
+    case 2:
+      $environment = new Twig2Environment($loader);
+      break;
+
+    default:
+      throw new \RuntimeException('Unsupported Twig version');
+  }
+  return $environment;
+}
+
 // Determine major Twig version.
 // \Twig\Environment::MAJOR_VERSION is not suitable here because of
 // https://github.com/twigphp/Twig/pull/2945

tests/dcg/Helper/RendererTest.php

@@ -3,7 +3,6 @@
 namespace DrupalCodeGenerator\Tests\Helper;
 
 use DrupalCodeGenerator\Helper\Renderer;
-use DrupalCodeGenerator\Twig\TwigEnvironment;
 use PHPUnit\Framework\TestCase;
 
 /**
@@ -15,8 +14,7 @@ class RendererTest extends TestCase {
    * Test callback.
    */
   public function testRenderer() {
-    $twig_loader = new \Twig_Loader_Filesystem();
-    $twig = new TwigEnvironment($twig_loader);
+    $twig = dcg_get_twig_environment(new \Twig_Loader_Filesystem());
     $renderer = new Renderer($twig);
     static::assertEquals($renderer->getName(), 'dcg_renderer');
     $renderer->addPath(__DIR__);

tests/dcg/TwigEnvironmentTest.php

@@ -3,7 +3,6 @@
 namespace DrupalCodeGenerator\Tests;
 
 use PHPUnit\Framework\TestCase;
-use DrupalCodeGenerator\Twig\TwigEnvironment;
 
 /**
  * A test for Twig environment.
@@ -15,7 +14,7 @@ class TwigEnvironmentTest extends TestCase {
    */
   public function testTwigEnvironment() {
     $twig_loader = new \Twig_Loader_Filesystem(__DIR__);
-    $twig = new TwigEnvironment($twig_loader);
+    $twig = \dcg_get_twig_environment($twig_loader);
     $expected = file_get_contents(__DIR__ . '/_twig_environment_fixture.txt');
     $result = $twig->render('twig-environment-template.twig', []);
     static::assertEquals($expected, $result);