nixos/flake.nix

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#  _ __ (_)_  _____  ___
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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 = {
    # 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";

    # 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,
    home-manager,
    plasma-manager,
    nixos-06cb-009a-fingerprint-sensor,
    hardware,
    ...
  } @ inputs: let
    inherit (self) outputs;
    # our systems are all x86_64 unfortunately
    systems = [
      "x86_64-linux"
    ];
    # This is a function that generates an attribute by calling a function you
    # pass to it, with each system as an argument
    forAllSystems = nixpkgs.lib.genAttrs systems;
  in {
      # Your custom packages
    # Accessible through 'nix build', 'nix shell', etc
    packages = forAllSystems (system: import ./pkgs nixpkgs.legacyPackages.${system});
    # Formatter for your nix files, available through 'nix fmt'
    # Other options beside 'alejandra' include 'nixpkgs-fmt'
    formatter = forAllSystems (system: nixpkgs.legacyPackages.${system}.alejandra);

    # Your custom packages and modifications, exported as overlays
    overlays = import ./overlays {inherit inputs;};
    # Reusable nixos modules you might want to export
    # These are usually stuff you would upstream into nixpkgs
    nixosModules = import ./modules/nixos;
    # Reusable home-manager modules you might want to export
    # These are usually stuff you would upstream into home-manager
    homeManagerModules = import ./modules/home-manager;

    # NixOS configuration entrypoint
    # Available through 'nixos-rebuild --flake .#your-hostname'
    nixosConfigurations = {
      # main laptop i use daily
      "thunkpad" = nixpkgs.lib.nixosSystem rec {
        specialArgs = {inherit inputs outputs;};
        modules = [
          # specific configs for thunkpad/t480
          ./machines/thunkpad
          # shared/common config
          ./nixos/configuration.nix
          # fingerprint modules
          nixos-06cb-009a-fingerprint-sensor.nixosModules.open-fprintd
          nixos-06cb-009a-fingerprint-sensor.nixosModules.python-validity
          # nyx repo
          chaotic.nixosModules.default
        ];
      };
      # secondary 2 in 1 device, not really used
      "thonkpad" = nixpkgs.lib.nixosSystem {
        specialArgs = {inherit inputs outputs;};
        modules = [
          # nixos configuration file (and others) for thonkpad
          ./machines/thonkpad
          # shared/common config
          ./nixos/configuration.nix
          # nyx repo
          chaotic.nixosModules.default
        ];
      };
    };

    # Standalone home-manager configuration entrypoint
    # Available through 'home-manager --flake .#your-username@your-hostname'
    homeConfigurations = {
      # TODO: theres probably a better way to do this/specify one home config for all devices
      # main device
      "thunkpad" = home-manager.lib.homeManagerConfiguration {
        pkgs = nixpkgs.legacyPackages.x86_64-linux; # Home-manager requires 'pkgs' instance
        extraSpecialArgs = {inherit inputs outputs;};
        modules = [
          ./users/ruben/home.nix
        ];
      };
      # secondary device
      "thonkpad" = home-manager.lib.homeManagerConfiguration {
        pkgs = nixpkgs.legacyPackages.x86_64-linux; # Home-manager requires 'pkgs' instance
        extraSpecialArgs = {inherit inputs outputs;};
        modules = [
          ./users/ruben/home.nix
        ];
      };
    };
  };
}