Migrate user roles into configuration.
function user_update_8017() {
$uuid = new Uuid();
$roles = db_select('role', 'r')
->fields('r')
->execute()
->fetchAll();
foreach ($roles as $role) {
config('user.role.' . $role->rid)
->set('id', $role->rid)
->set('uuid', $uuid
->generate())
->set('label', $role->name)
->set('weight', $role->weight)
->set('langcode', Language::LANGCODE_NOT_SPECIFIED)
->save();
}
}