After upgrading my Nextcloud 29.0.7 test installation (LXC under proxmox by nextcloudpi proxmox helper script) to 30.0.0, I see that core/js/mimetypelist.js (INVALID_HASH) and core/img/filetypes/dwg.svg (EXTRA_FILE) have failed the integrity check.
I tried to solve the EXTRA_FILE problem by moving core/img/filetypes/dwg.svg to my home directory and running occ integrity:check-core again. The result: Another EXTRA_FILE core/img/filetypes/dgn.svg is found.
If you would have read my post carefully and understood my problem, you would have seen that a deletion of the file in its original directory has the same effect as if it would have been moved to a different - in this case my home - directory. The result of removing the file from its original directory resulted in an new EXTRA_FILE. See above.
This would also not solve the problem with the INVALID_HASH. For me, it seems that the update did something wrong. How can I fix it?
I fixed it for myself (other than the release_lock file that keeps reappearing, but that is normal).
I had Apps installed (like the Draw.io integration) that added entries to the mimetypelist.js. I have overwritten the .js file with the one from the Git repo and the integrity check does not fail anymore.
On another note, there should be a similar file for Apps to put their custom mimetypes in so they don’t have to put theirs into a core file that is monitored by integrity checking. It’s a bad design at this point from either the App developer or the Nextcloud devs.
If the functionality is equivalent, I don’t see why the devs of those Apps are not using this. Makes sense to have it this way. Thanks for the reply!