Fix fallback logic for empty $source in browse() method to ensure config validation with improved fallback logic

Attached a static file project_browser--2025-01-13--3499406--mr-672.patch file form MR672
To be used with Composer Patches

I've just raised https://www.drupal.org/project/project_browser/issues/3499630 🐛 Some mandatory parameters are missing ("source") to generate a URL for route "project_browser.browse" Active which is a different error message experienced on a fresh D11.1 install, which looks to be related to project_browse.browse

I think this is a duplicate of 🐛 WSOD when using settings to limit sources to recipes Active
Or at least they are different approaches to the same underlying problem

Closing as a duplicate of 🐛 WSOD when using settings to limit sources to recipes Active , which has a more complete and robust fix. It should not be possible to access /admin/modules/browse without a source plugin ID.

Thanks for following up! Moving to follow with the better logic.

Still running into this error even after the release of project_browser 2.0.0-alpha8 → , which includes 🐛 WSOD when using settings to limit sources to recipes Active .

Anyone else seeing this?

Symfony\Component\Routing\Exception\MissingMandatoryParametersException: Some mandatory parameters are missing ("source") to generate a URL for route "project_browser.browse". in Drupal\Core\Routing\UrlGenerator->doGenerate() (line 187 of core/lib/Drupal/Core/Routing/UrlGenerator.php).

Not sure what’s wrong with my setup
just using the default under Drupal 10.4.1
Is Project Browser now only for Drupal 11?

Attached a static project_browser--2025-01-30--3499406-10.patch file as a TEMP
To use with Composer Patches

Having

project_browser.browse:
  path: '/admin/modules/browse/{source}'
  defaults:
    _controller: '\Drupal\project_browser\Controller\BrowserController::browse'
    _title: 'Browse projects'
    source: Drupal\project_browser\Plugin\ProjectBrowserSourceInterface
  requirements:
    _permission: 'administer modules'
  options:
    parameters:
      source:
        project_browser.source: true

And

  public function browse(ProjectBrowserSourceInterface $source): array {

    // If $source is not set, determine a default source.
    if (!isset($source)) {
      // Retrieve the list of enabled sources from project browser admin settings.
      $enabled_sources = $this->config('project_browser.admin_settings')->get('enabled_sources') ?? [];

      // If at least one enabled source exists, use the first one as the default.
      if (!empty($enabled_sources) && isset($enabled_sources[0])) {
        $source = $enabled_sources[0];
      }
    }

    return [
      '#type' => 'project_browser',
      '#source' => $source,
    ];
  }