Drupal Rector
Automated Drupal code updates

Drupal Rector is an open source tool built using Rector which can help automate many common code deprecations between different versions of Drupal starting with version 8.
The codebase and documentation can be found at: https://github.com/palantirnet/drupal-rector.
Palantir won the 2021 Acquia Engage Open Source Giants Award for its work on Drupal Rector.
Learn more
Other resources
- Accelerating Drupal Adoption with Drupal Rector (Drupal Association)
- Getting Started with Drupal Rector Development (Nerdstein)
- Jump-Start Your Drupal 9 Code Updates with Drupal Check and Drupal Rector (Drupalize.Me)