Fix copy control.

src/Plugin/migrate/process/FoxmlFile.php

@@ -57,7 +57,11 @@ public static function create(ContainerInterface $container, array $configuratio
       $plugin_id,
       $plugin_definition,
       $migration,
-      $process_plugin_manager->createInstance('dgi_migrate.naive_file_copy', [], $migration),
+      $process_plugin_manager->createInstance('dgi_migrate.naive_file_copy', [
+        'force_stub' => TRUE,
+        'move' => FALSE,
+        'file_exists' => 'rename',
+      ], $migration),
     );
   }
 
@@ -66,10 +70,15 @@ public static function create(ContainerInterface $container, array $configuratio
    */
   public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
     return match ($this->configuration['method']) {
-      'copy' => $this->naiveCopyPlugin->transform([
-        $value,
-        $this->getDestinationPath($row),
-      ], $migrate_executable, $row, $destination_property),
+      'copy' => $this->naiveCopyPlugin->transform(
+        [
+          $value,
+          $this->getDestinationPath($row),
+        ],
+        $migrate_executable,
+        $row,
+        $destination_property,
+      ),
       'direct' => static::ensureNonWritable($value),
     };
   }

src/Plugin/migrate/process/NaiveFileCopy.php

@@ -20,6 +20,10 @@
  * The core "file_copy" is rather opinionated, complicating the use of the
  * php:// scheme.
  *
+ * Extends "file_copy", additionally accepting:
+ * - force_stub: Boolean to force the copying when the row being processed
+ *   appears to be a stub.
+ *
  * @MigrateProcessPlugin(
  *   id = "dgi_migrate.naive_file_copy"
  * )
@@ -33,13 +37,21 @@ class NaiveFileCopy extends FileCopy implements ContainerFactoryPluginInterface
    */
   protected $migrateConfig;
 
+  /**
+   * Boolean if we should force copying when the row is a stub.
+   *
+   * @var bool
+   */
+  protected bool $forceStub;
+
   /**
    * Constructor.
    */
   public function __construct(array $configuration, $plugin_id, array $plugin_definition, StreamWrapperManagerInterface $stream_wrappers, FileSystemInterface $file_system, MigrateProcessInterface $download_plugin, ConfigFactoryInterface $config_factory) {
     parent::__construct($configuration, $plugin_id, $plugin_definition, $stream_wrappers, $file_system, $download_plugin);
 
     $this->migrateConfig = $config_factory->get('dgi_migrate.settings');
+    $this->forceStub = $this->configuration['force_stub'] ?? FALSE;
   }
 
   /**
@@ -63,7 +75,7 @@ public static function create(ContainerInterface $container, array $configuratio
   public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
     // If we're stubbing a file entity, return a URI of NULL so it will get
     // stubbed by the general process.
-    if ($row->isStub()) {
+    if (!$this->forceStub && $row->isStub()) {
       return NULL;
     }
     [$source, $destination] = $value;