Support .desktop files

[Enn3Developer]

It'd be nice if one can configure the shell installer to create a .desktop file on Linux, especially for GUI applications

[ashleygwilliams]

hey @Enn3Developer! that's a cool request- while it's not currently something we can prioritize, we would totally accept a PR for it- and are happy to help point you in the right direction either here or on our discord (https://discord.gg/XAFG6xSZ).

are you shipping some GUI applications? always love to hear what people are shipping with dist!

[Enn3Developer]

Yes, it's a music player and I found that dist simplifies my release workflow.
I already joined the discord so we could continue there

[duckinator]

I think it makes sense to leverage XDG here, since we're already looking to do so in #287 and it provides a well-defined path for user-installed .desktop files.

• $XDG_DATA_HOME defaults to $HOME/.local/share.
• .desktop files would go under $XDG_DATA_HOME/applications.

The main catch here is .desktop files usually reference icons. As best I can tell, the most portable way is to provide an icon yourself and specify an absolute path to it. The freedesktop.org desktop entry spec implies that you can't use e.g. an inlined base64-encoded image file, or at least can't guarantee that'll work. (Which is rather unfortunate.)