nixos/flake.nix

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#  _ __ (_)_  _____  ___
# | '_ \| \ \/ / _ \/ __|
# | | | | |>  < (_) \__ \
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# this configuration file is basically a mashup of https://github.com/chfour/nixos and https://github.com/Misterio77/nix-starter-configs
# with lots of examples and knowledge gained from both of them
# and also this wonderful book which helped get me started on nix https://nixos-and-flakes.thiscute.world
# shoutouts to yall 🙏
{
  description = "Sneexy's custom nixos configs";

  inputs = {
    # TODO: dear god there is a lot here. can we remove some? or try to split them?

    # nixpkgs from the unstable branch. since stable is a bit too dated
    # for my personal taste
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";

    # "fresh from git" master branch of nixpkgs. for packages not yet in unstable
    nixpkgs-master.url = "github:NixOS/nixpkgs/master";

    # chaotic's team nyx repo which usually contains unstable git packages or custom
    # packages, such as modified linux kernels (which we do use here)
    chaotic.url = "github:chaotic-cx/nyx/nyxpkgs-unstable";

    # flake that allows for installing system and user flatpaks
    flatpaks.url = "github:gmodena/nix-flatpak";

    # catppuccin's nix thingy for theming applications with catppuccin directly inside
    # of the config
    catppuccin.url = "github:catppuccin/nix";

    # home manager for managing user specific stuff
    home-manager = {
      url = "github:nix-community/home-manager/release-23.05";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    # plasma manager to allow configuring plasma within nix config
    plasma-manager = {
      url = "github:pjones/plasma-manager";
      inputs.nixpkgs.follows = "nixpkgs";
      inputs.home-manager.follows = "home-manager";
    };

    # flake for 06cb:009a fingerprint scanners. to make the fingerprint scanner on my
    # thinkpad t480 function.
    # TODO: see if you can only add this for t480
    nixos-06cb-009a-fingerprint-sensor = {
      url = "github:ahbnr/nixos-06cb-009a-fingerprint-sensor";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    # hardware flakes for some devices
    hardware.url = "github:nixos/nixos-hardware";
  };

  outputs = {
    self,
    nixpkgs,
    nixpkgs-master,
    chaotic,
    flatpaks,
    catppuccin,
    home-manager,
    plasma-manager,
    nixos-06cb-009a-fingerprint-sensor,
    hardware,
    ...
  } @ inputs: let
    inherit (self) outputs;
  in {
    nixosModules = {
      declarativeHome = { ... }: {
        # thanks to https://determinate.systems/posts/declarative-gnome-configuration-with-nixos for teaching how to use this home manager module
        imports = [ home-manager.nixosModules.home-manager ];
        config = {
          home-manager.useGlobalPkgs = true;
          home-manager.useUserPackages = true;
          home-manager.extraSpecialArgs.flake-inputs = inputs;
        };
      };
      defaults = { ... }: {
        # globally allow unfree packages
        nixpkgs.config.allowUnfree = true;
        # flakes, duh
        nix.settings = {
          experimental-features = [ "nix-command" "flakes" ];
          auto-optimise-store = true;
        };
      };
    };

    # NixOS configuration entrypoint
    # Available through 'nixos-rebuild --flake .#your-hostname'
    nixosConfigurations = {
      # my main laptop, a thinkpad t480
      "thunkpad" = nixpkgs.lib.nixosSystem rec {
        # boowomp sound effect
        system = "x86_64-linux";
        specialArgs = {
          inherit inputs outputs;
          pkgs-master = nixpkgs-master.legacyPackages.${system};
        };
        modules = with self.nixosModules; [
          # flatpaks
          flatpaks.nixosModules.nix-flatpak
          # nyx repo
          chaotic.nixosModules.default
          # system and user config
          ./machines/thunkpad
          declarativeHome ./users/ruben
        ];
      };
      # my secondary laptop, a thinkpad yoga 14...?
      "thonkpad" = nixpkgs.lib.nixosSystem rec {
        # boowomp sound effect x2
        system = "x86_64-linux";
        specialArgs = {
          inherit inputs outputs;
          pkgs-master = nixpkgs-master.legacyPackages.${system};
        };
        modules = with self.nixosModules; [
          # flatpaks
          flatpaks.nixosModules.nix-flatpak
          # nyx repo
          chaotic.nixosModules.default
          # system and user config
          ./machines/thonkpad
          declarativeHome ./users/ruben
        ];
      };
    };
  };
}