AWS CodeDeploy Adds File Handling Support

You can now choose how AWS CodeDeploy handles files on an instance that were not part of the previous deployment. Previously, CodeDeploy would fail the deployment when it detected a discrepancy between the files present at a target location and those in the last successful deployment. Now, you can choose how CodeDeploy responds (e.g., fail the deployment, retain the content, or overwrite the content) when encountering such files for each deployment.
Quelle: aws.amazon.com