Add rector rules for cakephp/authentication 4.x upgrade

[dereuromark]

Summary

Adds rector rules to automate the Authentication plugin 3.x to 4.x migration:

• Class renames:

  • Authentication\UrlChecker\CakeRouterUrlChecker → Authentication\UrlChecker\DefaultUrlChecker
  • Authentication\UrlChecker\DefaultUrlChecker (framework-agnostic) → Authentication\UrlChecker\GenericUrlChecker
  • Authentication\Plugin → Authentication\AuthenticationPlugin

• Method removal:

  • AuthenticationService::loadIdentifier() - removed in 4.x

Usage

bin/cake upgrade rector --rules authentication40

Or in custom rector config:

use Cake\Upgrade\Rector\Set\CakePHPSetList;

return static function (RectorConfig $rectorConfig): void {
    $rectorConfig->sets([CakePHPSetList::AUTHENTICATION_40]);
};

Not automated

Some changes require manual intervention and are documented in the upgrade guide:

1. Constant relocations - CREDENTIAL_USERNAME/CREDENTIAL_PASSWORD moved from AbstractIdentifier to PasswordIdentifier/LdapIdentifier
2. IdentifierCollection removal - Identifiers are now configured per-authenticator
3. MultiUrlChecker - Auto-detection removed, requires explicit configuration

Related

• Authentication 4.x PR: 4.x major: Remove deprecations, fix up MultiChecker. authentication#748
• Upgrade guide: https://github.com/cakephp/authentication/blob/4.x/docs/en/upgrade-3-to-4.rst