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themes/honey/honey.theme

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+<?php
+
+/**
+ * @file
+ * Functions to support theming in the Honey theme.
+ */
+
+/**
+ * Implements hook_preprocess_HOOK() for block.html.twig.
+ */
+function honey_preprocess_block(&$variables) {
+  // Add a clearfix class to system branding blocks.
+  if ($variables['plugin_id'] == 'system_branding_block') {
+    if (isset($variables['site_logo'])) {
+      $logo_path = DRUPAL_ROOT . $variables['site_logo'];
+      // If logo is a SVG lets load it content so we can inline it.
+      if (strlen($logo_path) - strpos($logo_path, '.svg') === 4) {
+        $variables['site_logo_svg'] = file_get_contents($logo_path);
+      }
+    }
+  }
+}