migrate_google_sheets-8.x-1.0/migrate_google_sheets_example/migrate_google_sheets_example.install

<?php

/**
 * @file
 * Contains install and update functions for migrate_google_sheets_example.
 */

use Drupal\migrate_plus\Entity\MigrationGroup;
use Drupal\migrate_plus\Entity\Migration;

/**
 * Implements hook_uninstall().
 */
function migrate_google_sheets_example_uninstall() {
  $migrations = Migration::loadMultiple();
  foreach ($migrations as $id_migration => $migration) {
    // Remove active config variables that would prevent a re-install.
    // We likely have to do a better job of ensuring everything related to the
    // migration is removed here; the config variable is just the bare minimum.
    $migration_config_id = str_replace('!id_migration', $id_migration, 'migrate_plus.migration.!id_migration');
    Drupal::configFactory()->getEditable($migration_config_id)->delete();
  }

  // Also remove migration group configs.
  $migration_groups = MigrationGroup::loadMultiple();
  foreach ($migration_groups as $id_group => $migration_group) {
    $migration_config_id = str_replace('!id_migration', $id_group, 'migrate_plus.migration_group.!id_migration');
    Drupal::configFactory()->getEditable($migration_config_id)->delete();
  }
}