Test cases need to be added to check if BBPOSTCONF and BBPRECONF are working as expected on bbitbake
This appears to still be a valid thing to do.
The prefile and postfile options are already tested. I just add the unexisting file case. Patch: https://lists.openembedded.org/g/openembedded-core/message/182656
Patch after correction : https://lists.openembedded.org/g/openembedded-core/message/182821
Sorry Fabien, this bug is not yet fixed, the patch is still in the master-next queue and not merged into master.
https://git.yoctoproject.org/poky/commit/?id=617d2303c0612b51954d06ecfe2ea491e9b82145