CachyOS - Fix issue with missing custom Proton install

[westinn]

This PR targets this issue.

Adding support for VDF files of any name in compatibilitytools.d folders, as well as support for absolute file paths for the install_path VDF value.

More specifically, to fix an issue with CachyOS using the install_path value to install binaries in a new location, which although matches Steam expected behavior, many tools did not support.

[Matoking]

Thank you for the PR!

I reproduced your findings by building an old revision of proton-cachyos-slr. There was a brief period of time when it was installed under /opt with an absolute path in the VDF file, though this change was short-lived and reverted soon after. But I can confirm Steam supports this and so should Protontricks by extension.

[westinn]

Thank you for the PR!

I reproduced your findings by building an old revision of proton-cachyos-slr. There was a brief period of time when it was installed under /opt with an absolute path in the VDF file, though this change was short-lived and reverted soon after. But I can confirm Steam supports this and so should Protontricks by extension.

Yes, it is currently reverted in a new release from Cachy. The maintainers in the official discord mentioned that the change will still eventually happen, as it is a better implementation, but that currently it just seems to cause problems for users.