[BUG] KeyError: 'compatmanager_layer_name' when opening Compatibility settings

[fenuks]

Describe the bug

Opening Compatibility tab in Settings page results in an exception being thrown.

Traceback (most recent call last):
  File "/usr/lib/python3.13/site-packages/rare/components/tabs/settings/widgets/proton.py", line 69, in showEvent
    tools = steam.find_tools()
  File "/usr/lib/python3.13/site-packages/rare/utils/compat/steam.py", line 413, in find_tools
    _tools = _find_tools()
  File "/usr/lib/python3.13/site-packages/rare/utils/compat/steam.py", line 385, in _find_tools
    runtimes.update(find_runtimes(steam_path, library))
                    ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.13/site-packages/rare/utils/compat/steam.py", line 216, in find_runtimes
    if toolmanifest["manifest"]["compatmanager_layer_name"] == "container-runtime":
       ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^
KeyError: 'compatmanager_layer_name'

Exception is thrown here.

I've added printing manifest line before, and it outputs

{'manifest': {'version': '2', 'commandline': '/proton %verb%', 'require_tool_appid': '1391110', 'use_sessions': '1'}}

I found comment here stating that Proton before 7.0 don't have this key,
so perhaps the line should be changed to

    if toolmanifest["manifest"].get("compatmanager_layer_name") == "container-runtime":

?

I can confirm that I have some older Proton versions installed.

To Reproduce

Steps to reproduce the behaviour:

1. Go to Settings
2. Click on Compatibility
3. See the error

System information

• Operating system: Linux
• Version: the latest git version, which is commit eab0b0f at the moment, the bug is also present in the latest stable release 1.11.3
• Installation method: official Arch package for the stable version, rare-git from AUR for the latest git version
• Python version: 3.13.3

[loathingKernel]

Hey, thank you for the thorough report, I really appreciate it. You are correct that this should be handled better, can you find out which tool causes this exactly? At the time I assumed that every version 2 tool would have the compatmanager_layer_name but seems like I was wrong, and I am curious.

[fenuks]

Hello, manifest in question comes from ~/.local/share/Steam/steamapps/common/Proton 5.13/toolmanifest.vdf.

Here are contents of the file:

"manifest"
{
  "version" "2"
  "commandline" "/proton %verb%"
  "require_tool_appid" "1391110"
  "use_sessions" "1"
}

[loathingKernel]

Thank you for the report, it should be fixed now. Somehow this issue slipped through despite documenting it previously. Sorry for the inconvenience.