Option to add environment variables to every game

[Mammad900]

Is your feature request related to a problem? Please describe.
I need to add some environment variables to be able to launch my games using my dGPU:

env DRI_PRIME=1 __NV_SHOW_GRAPHICS_OSD=1 __NV_PRIME_RENDER_OFFLOAD=1 __GLX_VENDOR_LIBRARY_NAME=nvidia <executable>

Right now I have to add these variables in every game's command, which is cumbersome. The long text also makes the executable field harder to use.

Describe the solution you'd like
An option to set some environment variables in one place that applies to every game would be appreciated.

Describe alternatives you've considered
This can be extended to adding any string to the start of the executables but I'm not sure if there's any use case for that.

Additional context
Add any other context or screenshots about the feature request here.

[Mammad900]

I have found a better alternative for GPU environment variables:
Adding these lines to the .desktop file will make the user's DE launch cartridges (and by extension any games launched from it) on the discrete graphics, no need to set environment variables in the command.

PrefersNonDefaultGPU=true
X-KDE-RunOnDiscreteGpu=true 

Copied from Steam's .desktop file

[kra-mo]

Would adding the environment variable to Cartridges itself using something like Flatseal not be enough? I'd rather not overcomplicate the UI.

[kra-mo]

And I suppose could add the desktop entry key, but I'm not sure if there could be any adverse side effects? If not, I'm all for it.

[Mammad900]

Would adding the environment variable to Cartridges itself using something like Flatseal not be enough? I'd rather not overcomplicate the UI.

Didn't know/think about this. It's probably a suitable option.

As a side note (should probably be a separate issue) word wrap in the executable field of games would be a godsend. Right now I sometimes have to edit the command in a text editor or terminal and paste it in Cartridges.

And I suppose could add the desktop entry key, but I'm not sure if there could be any adverse side effects? If not, I'm all for it.

I haven't noticed any side effects myself, and I predict it's going to be fine for others too since steam does fine. But other users' mileage may vary.
Maybe you could add it in a beta/experimental release and see if it has any side effects?

[kra-mo]

As a side note (should probably be a separate issue) word wrap in the executable field of games would be a godsend. Right now I sometimes have to edit the command in a text editor or terminal and paste it in Cartridges.

That's true yeah, I should probably make it more modular or just add the ability to open it in your preferred text editor directly.

 Maybe you could add it in a beta/experimental release and see if it has any side effects?

I don't do those, but it would be nice to collect feedback somewhere.