Question

I am in the process of debugging my way thru the rector codebase.

after adding some debug output, I was wondering - even if I have configured $rectorConfig->fileExtensions(['php']); in my config - I am seeing non-.php files beeing contained in $json[Bridge::FILES] when dumping it in WorkerRunner.php#L79

this indicates rector is reading/processing files which don't contain the configured extension, which seems to be unnecessary work.

I can see rector reading files like baseline.neon (PHPStan baselines), xml-files which are part of my app and similar.

since I can see them in the WorkerRunner I guess this also means the JSON data which is used to communicate between the processes also contain unncessary information which adds overhead in the inter process communication.

I was expecting, the files list would have already been filtered against the configured file-extension before beeing communicated to the workers?

is this expected behaviour?