Issue #1798884 by Luukyb, alexpott: Convert path_alias_whitelist() to state system .

core/includes/path.inc

@@ -72,7 +72,7 @@ function drupal_lookup_path($action, $path = '', $langcode = NULL) {
 
   // Retrieve the path alias whitelist.
   if (!isset($cache['whitelist'])) {
-    $cache['whitelist'] = variable_get('path_alias_whitelist', NULL);
+    $cache['whitelist'] = state()->get('system.path_alias_whitelist', NULL);
     if (!isset($cache['whitelist'])) {
       $cache['whitelist'] = drupal_path_alias_whitelist_rebuild();
     }
@@ -391,7 +391,7 @@ function drupal_path_alias_whitelist_rebuild($source = NULL) {
   // When paths are inserted, only rebuild the whitelist if the system path
   // has a top level component which is not already in the whitelist.
   if (!empty($source)) {
-    $whitelist = variable_get('path_alias_whitelist', NULL);
+    $whitelist = state()->get('system.path_alias_whitelist', NULL);
     if (isset($whitelist[strtok($source, '/')])) {
       return $whitelist;
     }
@@ -404,7 +404,7 @@ function drupal_path_alias_whitelist_rebuild($source = NULL) {
   foreach ($result as $row) {
     $whitelist[$row->path] = TRUE;
   }
-  variable_set('path_alias_whitelist', $whitelist);
+  state()->set('system.path_alias_whitelist', $whitelist);
   return $whitelist;
 }
 

core/modules/system/system.install

@@ -2163,6 +2163,18 @@ function system_update_8028() {
   update_variable_del('menu_masks');
 }
 
+/**
+ * Convert path_alias_whitelist variable to state API.
+ *
+ * @ingroup state_upgrade
+ */
+function system_update_8029() {
+  if ($value = update_variable_get('path_alias_whitelist', FALSE)) {
+    state()->set('system.path_alias_whitelist', $value);
+  }
+  update_variable_del('path_alias_whitelist');
+}
+
 /**
  * @} End of "defgroup updates-7.x-to-8.x".
  * The next series of updates should start at 9000.