grimm-nixos-laptop/fake_flake.nix

{
  pkgs,
  lib,
  config,
  system,
  ...
}:
let
  nivSources = import ./nix/sources.nix;
  asGithubRef = src: "github:${src.owner}/${src.repo}/${src.rev}";

  build_target =
    let
      env_host = builtins.getEnv "NIXOS_TARGET_HOST";
    in
    if env_host != "" then
      env_host
    else
      builtins.replaceStrings [ "\n" ] [ "" ] (lib.toLower (builtins.readFile /proc/sys/kernel/hostname));

  host_modules = {
    grimmauld-nixos = [ ./specific/grimm-nixos-laptop/configuration.nix ];

    grimmauld-nixos-server = [
      ./specific/grimmauld-nixos-server/configuration.nix
      ./modules/letsencrypt.nix

      ./modules/matrix.nix
      ./modules/puffer.nix
      ./modules/gitea.nix
      ./modules/grafana.nix
      ./modules/nextcloud.nix
      ./modules/prometheus.nix
      # ./modules/mjolnir.nix
      ./modules/fail2ban.nix
      ./modules/email.nix
      ./modules/discord-matrix-bridge.nix
      ./modules/mastodon.nix
    ];
  };

  nixpkgs_patches = [
    {
      # tlpui
      url = "https://patch-diff.githubusercontent.com/raw/NixOS/nixpkgs/pull/305278.patch";
      hash = "sha256-vmzj7gF8jwHdqxN+dQiJ4MRxKpHvBTzbrUvFgt1DK8I=";
    }
  ];
in
{
  imports = [
    "${nivSources.agenix}/modules/age.nix"
    (import "${nivSources.lix-module}/module.nix" { lix = nivSources.lix-pkg; })
    "${nivSources.nixos-mailserver}/default.nix"
    "${nivSources.nixos-matrix-modules}/module.nix"

    # fixme: ideally we'd not rely on the flake syntax to load the module
    (builtins.getFlake (asGithubRef nivSources.chaotic)).nixosModules.default
    # (builtins.getFlake (asGithubRef nivSources.nixos-matrix-modules)).nixosModules.default
    # (builtins.getFlake "git+${nivSources.nixos-mailserver.repo}").nixosModules.default
  ] ++ lib.optionals (builtins.hasAttr build_target host_modules) host_modules.${build_target};

  nixpkgs.hostPlatform = system;

#  system.nixos = {
#    distroId = "lixos";
#    distroName = "LixOS";
#  };

  environment.sessionVariables = with config.system.nixos; {
    distro = "${distroName} ${version} (${codeName}) ${system}";
  };

  nixpkgs.pkgs =
    let
      src = nivSources.nixpkgs;
      config = {
        allowUnfree = true;
      };
      unpatched = import src { inherit config system; };
      inherit (unpatched) applyPatches fetchpatch;
    in
    import (applyPatches {
      name = "nixpkgs-patched";
      inherit src;
      patches = map fetchpatch nixpkgs_patches;
    }) { inherit config; };

  nixpkgs.overlays = lib.singleton (
    final: prev: { agenix = final.callPackage "${nivSources.agenix}/pkgs/agenix.nix" { }; }
  );

  _module.args = {
    system = "x86_64-linux";
  };

  nix.settings.extra-substituters = [
    "https://cache.lix.systems"
    "https://nyx.chaotic.cx/"
  ];

  nix.settings.trusted-public-keys = [
    "cache.lix.systems:aBnZUw8zA7H35Cz2RyKFVs3H4PlGTLawyY5KRbvJR8o="
    "nyx.chaotic.cx-1:HfnXSw4pj95iI/n17rIDy40agHj12WfF+Gqk6SonIT8="
    "chaotic-nyx.cachix.org-1:HfnXSw4pj95iI/n17rIDy40agHj12WfF+Gqk6SonIT8="
  ];
}