Use $XDG_... folders on macOS

[frandsoh]

Are there any reasons why the XDG folders are not used on macOS if they are defined?

I know it's not the convention.

Is there an option I'm not aware of to change the folders used by dijo?

Thanks for great app! 🥇 😄

[nerdypepper]

Right now, there is no way to change the path to the data directories. The selected directories are the defaults provided by the dirs crate. I think it would make a lot more sense to make this configurable via the config file.