memory_limit_policy-8.x-1.2/modules/memory_limit_policy_path/memory_limit_policy_path.install

<?php

/**
 * @file
 * Install, uninstall and update hooks for Memory Limit Policy Path module.
 */

/**
 * Implements hook_update().
 *
 * Update the existing policies which use the path plugin to add forward slash.
 */
function memory_limit_policy_path_update_8001() {
  foreach (\Drupal::entityTypeManager()->getStorage('memory_limit_policy')->loadMultiple() as $policy) {

    $constraints = $policy->getConstraints();
    foreach ($constraints as &$constraint) {
      // We only update the "path" constraints.
      if ($constraint['id'] == 'path') {
        $paths = [];
        $updated = FALSE;
        foreach (explode(PHP_EOL, $constraint['paths']) as $path) {
          // We add a forward slash if there is none and if it does not start
          // with a wildcard.
          if (!in_array($path[0], ['/', '*'])) {
            $path = '/' . $path;
            $updated = TRUE;
          }
          $paths[] = $path;
        }

        // Log the constraint update for visibility.
        if ($updated) {
          $original_paths = explode(PHP_EOL, $constraint['paths']);
          array_walk($original_paths, function (&$path) {
            $path = rtrim(trim($path, "\r"), '/');
          });
          $updated_paths = $paths;
          array_walk($updated_paths, function (&$path) {
            $path = rtrim(trim($path, "\r"), '/');
          });

          \Drupal::logger('memory_limit_policy_path')->info(
            'The path constraint of policy "@policy_machine_name" has been updated from "@original_paths" to "@updated_paths".',
            [
              '@policy_machine_name' => $policy->id(),
              '@original_paths' => implode(', ', $original_paths),
              '@updated_paths' => implode(', ', $updated_paths),
            ]
          );
        }
        $constraint['paths'] = implode(PHP_EOL, $paths);
      }
    }
    $policy->set('policy_constraints', $constraints);
    $policy->save();
  }
}