Added drupal_breadcrumb() function.

src/TwigExtension.php

@@ -46,6 +46,7 @@ class TwigExtension extends \Twig_Extension {
       new \Twig_SimpleFunction('drupal_url', [$this, 'drupalUrl']),
       new \Twig_SimpleFunction('drupal_link', [$this, 'drupalLink']),
       new \Twig_SimpleFunction('drupal_messages', [$this, 'drupalMessages']),
+      new \Twig_SimpleFunction('drupal_breadcrumb', [$this, 'drupalBreadcrumb']),
     ];
   }
 
@@ -515,6 +516,15 @@ class TwigExtension extends \Twig_Extension {
     return ['#type' => 'status_messages'];
   }
 
+  /**
+   * Builds the breadcrumb.
+   */
+  public function drupalBreadcrumb() {
+    return \Drupal::service('breadcrumb')
+      ->build(\Drupal::routeMatch())
+      ->toRenderable();
+  }
+
   /**
    * Replaces all tokens in a given string with appropriate values.
    *

tests/src/Functional/TwigTweakTest.php

@@ -199,6 +199,10 @@ class TwigTweakTest extends BrowserTestBase {
     $xpath = '//div[@class = "tt-messages"]/div[contains(@class, "messages--status") and contains(., "Hello world!")]';
     $this->assertByXpath($xpath);
 
+    // Test breadcrumb.
+    $xpath = '//div[@class = "tt-breadcrumb"]/nav[@class = "breadcrumb"]/ol/li/a[text() = "Home"]';
+    $this->assertByXpath($xpath);
+
     // Test protected link.
     $xpath = '//div[@class = "tt-link-access"]';
     self::assertEquals('', trim($this->xpath($xpath)[0]->getHtml()));

tests/twig_tweak_test/templates/twig-tweak-test.html.twig

@@ -44,6 +44,7 @@
   <div class="tt-url">{{ drupal_url('node/1', {absolute: true}) }}</div>
   <div class="tt-link">{{ drupal_link('Edit', 'node/1/edit', {absolute: true}) }}</div>
   <div class="tt-messages">{{ drupal_messages() }}</div>
+  <div class="tt-breadcrumb">{{ drupal_breadcrumb() }}</div>
   <div class="tt-link-access">{{ drupal_link('Edit', 'node/1/edit', {absolute: true}, true) }}</div>
   <div class="tt-token-replace">{{ 'Site name: [site:name]' | token_replace }}</div>
   <div class="tt-preg-replace">{{ 'FOO' | preg_replace('/(foo)/i', '$1-bar') }}</div>