nix-cfg/flake.nix

{
  description = "Lgm's NixOS Flake";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    nixpkgs-stable.url = "github:NixOS/nixpkgs/nixos-24.05";

    flake-parts.url = "github:hercules-ci/flake-parts";
    flake-compat.url = "github:edolstra/flake-compat";
    systems.url = "github:nix-systems/default";
    flake-utils = {
      url = "github:numtide/flake-utils";
      inputs.systems.follows = "systems";
    };

    home-manager = {
      url = "github:nix-community/home-manager/master";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    sops-nix = {
      url = "github:Mic92/sops-nix";
      inputs.nixpkgs.follows = "nixpkgs";
      inputs.nixpkgs-stable.follows = "nixpkgs-stable";
    };
    mailserver = {
      url = "gitlab:simple-nixos-mailserver/nixos-mailserver/master";
      inputs.flake-compat.follows = "flake-compat";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    authentik-nix = {
      url = "github:nix-community/authentik-nix";
      inputs.nixpkgs.follows = "nixpkgs";
      inputs.flake-parts.follows = "flake-parts";
    };

    nix-cfg-extra.url = "git+https://git.lgmrszd.xyz/lgmrszd/nix-cfg-extra-public.git";
  };

  outputs = inputs@{
    nixpkgs,
    nixpkgs-stable,
    home-manager,
    sops-nix,
    mailserver,
    authentik-nix,
    ...
  }: 
  let
    system = "x86_64-linux";
    # overlay-stable = final: prev: {
    #   stable = import nixpkgs-stable {
    #     inherit system;
    #     config.allowUnfree = true;
    #   };
    # };
    overlay-vaapiIntel = final: prev: {
      vaapiIntel = prev.vaapiIntel.override { enableHybridCodec = true; };
    };
    my-overlays = [
      # overlay-stable
      overlay-vaapiIntel
    ];
    inherit (inputs.nix-cfg-extra.lib) extra-data;
    inherit (inputs.nix-cfg-extra.lib) extra-host-modules;
    inherit (inputs.nix-cfg-extra.lib) extra-host-home-modules;

    mkHostConfig = ({ host, extraModules ? [], useHome ? false }: 
      let
      # TODO: rename some of those
        data = import ./hosts/${host}/data  // (if extra-data ? ${host} then extra-data.${host} else {});
        extra-modules = (if extra-host-modules ? ${host} then extra-host-modules.${host} else []);
        extra-home-modules = (if extra-host-home-modules ? ${host} then extra-host-home-modules.${host} else []);
      in
      nixpkgs.lib.nixosSystem {
      inherit system;
      specialArgs = { inherit data; };
      modules = [
        { nixpkgs.overlays = my-overlays; }
        ./hosts/${host}/configuration.nix
        ./hosts/${host}/hardware-configuration.nix
        sops-nix.nixosModules.sops
      ]
      ++ extra-modules
      ++ extraModules
      ++ (if !useHome then [] else [
        home-manager.nixosModules.home-manager
        {
          home-manager.useGlobalPkgs = true;
          home-manager.useUserPackages = true;
          home-manager.users.lgm = {
            imports = [
              ./hosts/${host}/home
            ] ++ extra-home-modules;
          };
        }
      ])
      ;
    });
  in
  {
    nixosConfigurations.lgm-nixos = mkHostConfig {
      host = "laptop";
      useHome = true;
    };
    nixosConfigurations.lgm-vps1 = mkHostConfig {
      host = "vps1";
      extraModules = [
        mailserver.nixosModule
        authentik-nix.nixosModules.default
      ];
    };
  };
}