Lite-system: Build system configurations using flake-parts

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https://github.com/yelite/lite-system

lite-system is a flake module to help build NixOS, nix-darwin and Home Manager configurations, creating a consistent environment across different devices.

I created it when I migrated my personal system configurations to flake-parts. I believe it can solve some common problems when building personal system configurations, so I extracted it out of my configuration repo into a standalone flake module.

An example (which is also in the readme of the repo):

{
  inputs = {
    nixpkgs.url = "nixpkgs/nixos-unstable";
    flake-parts.url = "github:hercules-ci/flake-parts";
    lite-system.url = "github:yelite/lite-system";
    nix-darwin = {
      url = "github:lnl7/nix-darwin";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    home-manager = {
      url = "github:nix-community/home-manager";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };
  outputs = inputs @ {flake-parts, ...}:
    flake-parts.lib.mkFlake {inherit inputs;} ({inputs, ...}: {
      imports = [
        inputs.lite-system.flakeModule
      ];

      config.lite-system = {
        # Configure the nixpkgs that is used in all configurations created by `lite-system`.
        nixpkgs = {
          config = {
            allowUnfree = true;
          };
          overlays = [
            (import ./overlay)
          ];
        };

        # The system module will be imported for all host configurations.
        systemModule = ./system;
        # The home module is a Home Manager module, used by all host configurations.
        homeModule = ./home;
        # This directory contains per-host system module.
        hostModuleDir = ./hosts;

        hosts = {
          # This generates `nixosConfigurations.my-desktop` with NixOS module
          # `./system`, `./hosts/my-desktop` and Home Manager module `./home`.
          my-desktop = {
            system = "x86_64-linux";
          };

          # This generates `darwinConfigurations.my-macbook` with nix-darwin module
          # `./system`, `./hosts/my-desktop` and Home Manager module `./home`.
          #
          # Note that `./system` module is used in both NixOS and nix-darwin configurations.
          # A `hostPlatform` special arg is added to both system modules
          # and home manager modules, enabling conditional confiIt offers only a fundamental framework for building flakes of system configurations. guration based on
          # the system type.
          my-macbook = {
            system = "aarch64-darwin";
          };
        };
      };
    });
}

Feedback would be welcome!

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