nix-config/flake.nix

{
  description = "nixos and macos configurations";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.11";
    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixpkgs-unstable";

    home-manager.url = "github:nix-community/home-manager/release-23.11";
    home-manager.inputs.nixpkgs.follows = "nixpkgs";

    nix-ld.url = "github:Mic92/nix-ld";

    nixos-hardware.url = "github:NixOS/nixos-hardware";

    darwin = {
      url = "github:lnl7/nix-darwin";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    nixvim = {
      url = "github:nix-community/nixvim/nixos-23.11";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs =
    { self
    , darwin
    , home-manager
    , nixpkgs
    , nixpkgs-unstable
    , nixos-hardware
    , nix-ld
    , ...
    } @ inputs: {
      nixosConfigurations =
        let
          modulesDir = ./modules;
          unstable = import nixpkgs-unstable {
            system = "x86_64-linux";
            config.allowUnfree = true;
            config.permittedInsecurePackages = [ ];
          };
          defaultModules = [
            home-manager.nixosModules.home-manager
            ./fonts.nix
            ./packages.nix
            ./upgrade-diff.nix

            ({ config
             , lib
             , ...
             }: {
              config = {
                nix = {
                  settings = {
                    auto-optimise-store = true;
                    sandbox = false;
                    substituters = [ "https://davegallant.cachix.org" ];
                    trusted-users = [ "root" "dave" ];
                    trusted-public-keys = [
                      "davegallant.cachix.org-1:SsUMqL4+tF2R3/G6X903E9laLlY1rES2QKFfePegF08="
                    ];
                  };
                  registry = { nixpkgs.flake = nixpkgs; };
                  gc = {
                    automatic = true;
                    dates = "daily";
                    options = "--delete-older-than 14d";
                  };
                };

                nixpkgs.overlays = [
                  (import ./overlays)
                ];

                home-manager = {
                  useGlobalPkgs = true;
                  useUserPackages = true;
                  users.dave.imports = [
                    ./home/default.nix
                    inputs.nixvim.homeManagerModules.nixvim
                  ];
                  extraSpecialArgs = {
                    inherit unstable;
                  };
                };
              };
            })
          ];
        in
        {
          hephaestus = nixpkgs.lib.nixosSystem {
            specialArgs = { inherit unstable; };
            modules =
              [
                ./machines/hephaestus/configuration.nix
                ./services/netdata/default.nix
              ]
              ++ defaultModules;
          };
        };

      darwinConfigurations =
        let
          system = "aarch64-darwin";
          unstable = import nixpkgs-unstable {
            config.allowUnfree = true;
            inherit system;
          };
        in
        {
          zelus = darwin.lib.darwinSystem {
            inherit system;
            specialArgs = { inherit unstable; };

            modules = [
              home-manager.darwinModules.home-manager
              ./machines/zelus/configuration.nix
              ./packages.nix
              ./upgrade-diff.nix

              ({ config, ... }: {
                config = {
                  nixpkgs.overlays = [
                    (import ./overlays)
                  ];
                  home-manager = {
                    useGlobalPkgs = true;
                    useUserPackages = true;
                    users."dave.gallant".imports = [
                      ./home/default.nix
                      inputs.nixvim.homeManagerModules.nixvim
                    ];
                    extraSpecialArgs = {
                      inherit unstable;
                    };
                  };
                };
              })
            ];
          };
        };
    };
}