nix: build package from repository source

[ratson]

• Move nix files to nix/
• Set nix package src to use repository
• Set mainProgram instead of main_program
• Set version to include commit short hash and modified date

[linkfrg]

docs/user/installation.rst

ignis.url = "git+https://github.com/linkfrg/ignis?submodules=1";

I'm a bit confused by this line. Is it possible to fetch submodules in ignis.nix as it is now?

[ratson]

Is it possible to fetch submodules in ignis.nix as it is now?

No, the following command gives the error meson.build:31:0: ERROR: Neither a subproject directory nor a gvc.wrap file was found.,

nix build "github:ratson/ignis/a1ea09b19302944cbf7137e89dddc80f58fa3c47"

while the follow command builds without problem,

nix build "git+https://github.com/ratson/ignis?submodules=1&rev=a1ea09b19302944cbf7137e89dddc80f58fa3c47"

[linkfrg]

I'm just a little scared by the length of this line in the docs, in ags for example Gvc fetch manually in default.nix.
Anyway, thanks!

Btw you also need to make a PR for the stable branch to update the stable docs. (no need, i did in a94e205)

[ratson]

Hyprland build from the GitHub repository requires the same, so it should be fine.

Here why github: not working for git submodule: NixOS/nix#4423 (comment)