Coming back to the issue first described here:
https://www.drupal.org/project/s3fs/issues/3089225 →
Core now has a way to highlight when config has been overriden:
https://www.drupal.org/project/drupal/issues/2408549
🐛
Display status message on configuration forms when there are overridden values
Fixed
1. In settings.php override a config value like
$config['s3fs.settings']['bucket'] = 'my-s3-bucket-prod';
2. Visit /admin/config/media/s3fs
3. No indication that bucket value is overwritten
Use #config_target on relevant fields in SettingsForm.
If done correctly will get a status message like attached
Active
3.0
Code
Core now has a way to highlight when config has been overriden:
Interesting, I knew that config_target would allow usage of Core validation of config, and IIRC it could be used to render the config forms (we are not ready for that in s3fs) however was not aware it was now the solution for indicating overrides.
Could be useful to adopt.