path: root/nix/lib/mkSystem.nix

# This function creates a NixOS system based on our VM setup for a
# particular architecture.
{
  nixpkgs,
  inputs,
  overlays,
}:

name:
{
  system,
  user,
  darwin ? false,
}:

let
  # The config files for this system.
  machineConfig = ../machines/${name};
  userOSConfig = ../users/${user}/${if darwin then "darwin" else "nixos"}.nix;
  userHMConfig = ../users/${user}/home-manager.nix;

  # NixOS vs nix-darwin functionst
  systemFunc = if darwin then inputs.darwin.lib.darwinSystem else nixpkgs.lib.nixosSystem;
  home-manager =
    if darwin then inputs.home-manager.darwinModules else inputs.home-manager.nixosModules;
in
systemFunc rec {
  inherit system;

  modules = [
    # Allow unfree packages.
    { nixpkgs.config.allowUnfree = true; }

    # Add overlays
    { nixpkgs.overlays = overlays; }

    machineConfig
    userOSConfig
    home-manager.home-manager
    {
      home-manager.useGlobalPkgs = true;
      home-manager.useUserPackages = true;
      home-manager.users.${user} = import userHMConfig {
        inputs = inputs;
        darwin = darwin;
        systemName = name;
      };
    }

    # We expose some extra arguments so that our modules can parameterize
    # better based on these values.
    {
      config._module.args = {
        currentSystem = system;
        currentSystemName = name;
        currentSystemUser = user;
        inputs = inputs;
      };
    }
  ];
}