Issue #2938677: Register new options for drush migrate:import in Drush 9+

migrate_devel.drush.inc

@@ -14,11 +14,6 @@ use Drush\Log\LogLevel;
  * Implements hook_drush_help_alter().
  */
 function migrate_devel_drush_help_alter(&$command) {
-  if ($command['command'] === 'migrate-import') {
-    $command['options']['migrate-debug'] = 'Enable Debug Mode';
-    $command['options']['migrate-debug-pre'] = 'Enable Debug Mode (Before Row Save)';
-  }
-
   if ($command['command'] === 'migrate-status') {
     $command['options']['migrate-debug'] = 'Enable Debug Mode';
   }

src/Commands/MigrateDevelCommands.php

@@ -2,6 +2,7 @@
 
 namespace Drupal\migrate_devel\Commands;
 
+use Consolidation\AnnotatedCommand\CommandData;
 use Drush\Commands\DrushCommands;
 
 /**
@@ -9,4 +10,17 @@ use Drush\Commands\DrushCommands;
  */
 class MigrateDevelCommands extends DrushCommands {
 
+    /**
+     * Register two new options for the migrate:import command.
+     *
+     * @hook command migrate:import
+     * @option migrate-debug Enable Debug Mode
+     * @option migrate-debug-pre Enable Debug Mode (Before Row Save)
+     */
+    public function additionalOptionsMigrateImport(CommandData $commandData)
+    {
+      // No action required here. The new options will be examined in the
+      // migrate event subscriber methods.
+    }
+
 }