mh.php

<?php

// Helper for executing migrations in D8, without migrate_tools.

$args = drush_get_arguments();
array_splice($args, 0, 2);

$cmd = array_shift($args);
switch ($cmd) {
  case 'mi':
  case 'mia':
    $exec = function($executable, $migration) {
      printf("Importing %s\n", $migration->id());
      $executable->import();
    };
    break;
  case 'mr':
  case 'mra':
    $exec = function($executable, $migration) {
      printf("Rolling back %s\n", $migration->id());
      $executable->rollback();
    };
    break;
  default:
    die("Unknown command $cmd");
}

/** @var \Drupal\migrate\Plugin\MigrationPluginManager $manager */
$manager = \Drupal::service('plugin.manager.migration');

// Get requirements.
$migrations = [];
while (!empty($args)) {
  $migration_id = array_shift($args);
  $instances = $manager->createInstances($migration_id);
  foreach ($instances as $migration) {
    $migrations[$migration_id] = $migration;
    if ($cmd === 'mia' || $cmd === 'mra') {
      $args = array_merge($args, array_values($migration->get('requirements')));
    }
  }
}
$migrations = $manager->buildDependencyMigration($migrations, []);
if ($cmd === 'mia') {
  $migrations = array_reverse($migrations);
}

$message = new \Drupal\migrate\MigrateMessage();
foreach ($migrations as $migration) {
  $executable = new \Drupal\migrate\MigrateExecutable($migration, $message);
  $exec($executable, $migration);
}