Detect the XDG runtime setting in env instead of configuration (on macOS)

[nanozuki]

For some compatibility reasons, I set my own XDG Base Directories. Not equal to default macOS folder suggestions.
I know there is a configuration to open XDG support on Mac, but some zig tools (such as zls ) don't provide a method to change it. If known-folders can read env and follow the XDG settings, will resolve this problem.

[ikskuh]

Make an issue on their repository to enable XDG on mac. They only have to add this to their root file:

pub const known_folders_config = .{ .xdg_on_mac = true };

[nanozuki]

Indeed this is a method. But I think it's still necessary to detect env:

• Give the choice to the end-user, not binary developers. Since one binary will be used by many users with different enviroments.
• By detecting env variables, a user can opt-in XDG directory, and use other directories in macOS default.

[will]

I would also like this feature.

I use macos and prefer using XDG directories for everything. I use zls which uses this project, but I have no way to insert pub const known_folders_config = .{ .xdg_on_mac = true }; into the code of zls, since I'm just a user of zls.