Accumulating many .foz files with Gamescope

[cchulo]

So I am running Emulationstation-DE, Resident Evil HD, and Nier Automata all with Gamescope. I have been noticing that every time I start up with gamescope it creates a new .foz file inside of the steamapps/shadercache/fozpipelinesv6 directory. It looks like the way it is creating them is a bug because the hash is the same, but it keeps making copies. Take RE HD for example:

it is executed with gamescope -H 1440 -h 1440 -r 60 -f -- %command%
The Foz files that are created every time look like:

With emulationstation-DE, something that's been installed longer than RE HD and has been used quite a bit:

Note that for ES-DE the hash changed at some point, this may have been due to me installing new GPU drivers

With Nier its the same situation, a new .foz file everytime I launch the game

All the .foz files are the same size, the question is though is this a bug with gamescope or with steam? It looks as if gamescope doesn't bother to check if a foz file already exists, it just keeps creating them. Since I don't think steam is what is creating these files, I don't think steam will know how to clean these files up. ES-DE for example has 300 mb accumulated.

[cchulo]

this may not be a problem with gamescope, but fossilize, will open a PR over at that repo

[cchulo]

reopening, as I think I know what these files are. These are pre-compiled shaders, and for some reason gamescope might be making steam runtime think that the last pre-compiled shaders were invalid, and thus creating a new .foz each time a game is launched with gamescope.

[cchulo]

determined that this is not a gamescope problem, the issue is happening with Quake as well, and I have definitely never run that game with gamescope. Will open an issue with steam-runtime.