migrate_plus-8.x-5.x-dev/src/Plugin/MigrationConfigDeriver.php

<?php

declare(strict_types=1);

namespace Drupal\migrate_plus\Plugin;

use Drupal\Component\Plugin\Derivative\DeriverBase;
use Drupal\migrate_plus\Entity\Migration;

/**
 * Expose migration entities in the active config store as derivative plugins.
 */
class MigrationConfigDeriver extends DeriverBase {

  /**
   * {@inheritdoc}
   */
  public function getDerivativeDefinitions($base_plugin_definition): array {
    // Always re-derive from scratch, because changes may have been made without
    // clearing our internal cache.
    $this->derivatives = [];
    $migrations = Migration::loadMultiple();
    /** @var \Drupal\migrate_plus\Entity\MigrationInterface $migration */
    foreach ($migrations as $id => $migration) {
      if (!$migration->status()) {
        continue;
      }

      $this->derivatives[$id] = $migration->toArray();
    }
    return $this->derivatives;
  }

}