Restore duplicate subfolder removal

inc/roots-cleanup.php

@@ -52,14 +52,25 @@ function roots_root_relative_url($input) {
   return $output;
 }
 
+// Terrible workaround to remove the duplicate subfolder in the src of JS/CSS tags
+// Example: /subfolder/subfolder/css/style.css
+function roots_fix_duplicate_subfolder_urls($input) {
+  $output = roots_root_relative_url($input);
+  preg_match_all('!([^/]+)/([^/]+)!', $output, $matches);
+  if (isset($matches[1]) && isset($matches[2])) {
+    if ($matches[1][0] === $matches[2][0]) {
+      $output = substr($output, strlen($matches[1][0]) + 1);
+    }
+  }
+  return $output;
+}
+
 if (!is_admin() && !in_array($GLOBALS['pagenow'], array('wp-login.php', 'wp-register.php'))) {
   $tags = array(
     'bloginfo_url',
     'theme_root_uri',
     'stylesheet_directory_uri',
     'template_directory_uri',
-    'script_loader_src',
-    'style_loader_src',
     'plugins_url',
     'the_permalink',
     'wp_list_pages',
@@ -77,6 +88,9 @@ function roots_root_relative_url($input) {
   );
 
   add_filters($tags, 'roots_root_relative_url');
+
+  add_filter('script_loader_src', 'roots_fix_duplicate_subfolder_urls');
+  add_filter('style_loader_src', 'roots_fix_duplicate_subfolder_urls');
 }
 
 // remove root relative URLs on any attachments in the feed
@@ -652,4 +666,4 @@ function roots_gform_submit_button($button, $form) {
   }
   add_filter('gform_submit_button', 'roots_gform_submit_button', 10, 2);
 
-}
+}