materio-base-d7/sites/all/modules/contrib/files/imagestyleflush/imagestyleflush.install

<?php

/**
 * @file
 * Contains install and update functions for imagestyleflush.
 */

/**
 * A new permission has been defined. Give it to all roles that currently
 * have the 'administer image styles' permission.
 */
function imagestyleflush_update_7000() {
  // Since hook_update_N() can run on disabled modules, ensure the module
  // file is loaded so we can get the list of permissions.
  module_load_include('module', 'imagestyleflush', 'imagestyleflush');
  $permissions = array_keys(imagestyleflush_permission());

  // Get existing role_permissions.
  $rids = db_select('role_permission', 'rp')
    ->fields('rp', array('rid'))
    ->condition('permission', 'administer image styles')
    ->execute()
    ->fetchCol();

  // Add the permissions for each role.
  foreach ($rids as $rid) {
    foreach ($permissions as $name) {
      db_merge('role_permission')
        ->key(array(
          'rid' => $rid,
          'permission' => $name,
        ))
        ->fields(array(
          'module' => 'imagestyleflush',
        ))
        ->execute();
    }
  }
}