server-config/flake.nix

{
  description = "Flake for server muffin";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05";

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

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

    nix-minecraft = {
      url = "github:Infinidoge/nix-minecraft";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    vpn-confinement.url = "github:Maroka-chan/VPN-Confinement";

    home-manager = {
      url = "github:nix-community/home-manager/release-25.05";
      inputs.nixpkgs.follows = "nixpkgs";
    };

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

    llamacpp = {
      url = "github:ggml-org/llama.cpp";
      inputs.nixpkgs.follows = "nixpkgs";
    };

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

    deploy-rs = {
      url = "github:serokell/deploy-rs";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs =
    {
      self,
      nixpkgs,
      nix-minecraft,
      nixos-hardware,
      vpn-confinement,
      home-manager,
      lanzaboote,
      disko,
      srvos,
      deploy-rs,
      ...
    }@inputs:
    let
      username = "primary";
      hostname = "muffin";
      eth_interface = "enp4s0";
      system = "x86_64-linux";

      service_configs = rec {
        zpool_ssds = "tank";
        zpool_hdds = "hdds";
        torrents_path = "/torrents";
        services_dir = "/${zpool_ssds}/services";
        music_dir = "/${zpool_ssds}/music";
        torrent_group = "media";

        ports = {
          https = 443;
          jellyfin = 8096; # no services.jellyfin option for this
          torrent = 6011;
          bitmagnet = 3333;
          owntracks = 3825;
          gitea = 2283;
          immich = 2284;
          soulseek_web = 5030;
          soulseek_listen = 50300;
          llama_cpp = 8991;
        };

        https = {
          certs = services_dir + "/http_certs";
          # TODO! generate website from repo directly using hugo
          data_dir = services_dir + "/http";
          domain = "gardling.com";
          wg_ip = "192.168.15.1";
          matrix_hostname = "matrix.${service_configs.https.domain}";
        };

        gitea = {
          dir = services_dir + "/gitea";
          domain = "git.${https.domain}";
        };

        postgres = {
          socket = "/run/postgresql";
          dataDir = services_dir + "/sql";
        };

        immich = {
          dir = services_dir + "/immich";
        };

        minecraft = {
          parent_dir = services_dir + "/minecraft";
          server_name = "main";
        };

        torrent = {
          SavePath = torrents_path;
          TempPath = torrents_path + "/incomplete";
        };

        jellyfin = {
          dataDir = services_dir + "/jellyfin";
          cacheDir = services_dir + "/jellyfin_cache";
        };

        owntracks = {
          data_dir = services_dir + "/owntracks";
        };

        slskd = rec {
          base = "/var/lib/slskd";
          downloads = base + "/downloads";
          incomplete = base + "/incomplete";
        };
      };

      pkgs = import nixpkgs {
        inherit system;
        hostPlatform = system;
        buildPlatform = builtins.currentSystem;
      };
      lib = import ./lib.nix { inherit inputs pkgs; };
    in
    {
      formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.nixfmt-rfc-style;
      nixosConfigurations.${hostname} = nixpkgs.lib.nixosSystem {
        inherit system;
        specialArgs = rec {
          inherit
            username
            hostname
            eth_interface
            service_configs
            inputs
            lib
            ;
        };
        modules = [
          # SAFETY! make sure no ports collide
          (
            { lib, ... }:
            {
              config.assertions = [
                {
                  assertion =
                    let
                      ports = lib.attrValues service_configs.ports;
                      uniquePorts = lib.unique ports;
                    in
                    (lib.length ports) == (lib.length uniquePorts);
                  message = "Duplicate ports detected in 'ports' configuration";
                }
              ];
            }
          )

          # sets up things like the watchdog
          srvos.nixosModules.server

          # diff terminal support
          srvos.nixosModules.mixins-terminfo

          ./disk-config.nix
          disko.nixosModules.disko
          ./configuration.nix

          vpn-confinement.nixosModules.default

          # get nix-minecraft working!
          nix-minecraft.nixosModules.minecraft-servers
          {
            nixpkgs.overlays = [ nix-minecraft.overlay ];
          }

          lanzaboote.nixosModules.lanzaboote

          home-manager.nixosModules.home-manager
          (
            {
              home-manager,
              ...
            }:
            {
              home-manager.users.${username} = import ./home.nix;
            }
          )
        ]
        ++ (with nixos-hardware.nixosModules; [
          common-cpu-amd-pstate
          common-cpu-amd-zenpower
          common-pc-ssd
          common-gpu-intel
        ]);
      };

      deploy.nodes.muffin = {
        hostname = "server-public";
        profiles.system = {
          sshUser = "root";
          user = "root";
          path = deploy-rs.lib.${system}.activate.nixos self.nixosConfigurations.muffin;
        };
      };

      packages.${system} =
        let
          testSuite = import ./tests/tests.nix {
            inherit pkgs lib;
            config = self.nixosConfigurations.muffin.config;
          };
        in
        {
          tests = pkgs.linkFarm "all-tests" (
            pkgs.lib.mapAttrsToList (name: test: {
              name = name;
              path = test;
            }) testSuite
          );
        }
        // (pkgs.lib.mapAttrs' (name: test: {
          name = "test-${name}";
          value = test;
        }) testSuite);
    };
}