{ config , pkgs , lib , ... }: let cfg = config.services.xonotic; serverCfg = pkgs.writeText "xonotic-server.cfg" ( toString cfg.prependConfig + "\n" + builtins.concatStringsSep "\n" ( lib.mapAttrsToList (key: option: let escape = s: lib.escape [ "\"" ] s; quote = s: "\"${s}\""; toValue = x: quote (escape (toString x)); value = (if lib.isList option then builtins.concatStringsSep " " (builtins.map (x: toValue x) option) else toValue option ); in "${key} ${value}" ) cfg.settings ) + "\n" + toString cfg.appendConfig ); in { options.services.xonotic = { enable = lib.mkEnableOption (lib.mdDoc "Xonotic dedicated server"); package = lib.mkPackageOption pkgs "xonotic-dedicated" {}; openFirewall = lib.mkOption { type = lib.types.bool; default = false; description = lib.mdDoc '' Open the firewall for TCP and UDP on the specified port. ''; }; dataDir = lib.mkOption { type = lib.types.path; readOnly = true; default = "/var/lib/xonotic"; description = lib.mdDoc '' Data directory. ''; }; settings = lib.mkOption { description = lib.mdDoc '' Generates the `server.cfg` file. Refer to [upstream's example][0] for details. [0]: https://gitlab.com/xonotic/xonotic/-/blob/master/server/server.cfg ''; default = {}; type = lib.types.submodule { freeformType = with lib.types; let scalars = oneOf [ singleLineStr int float ]; in attrsOf (oneOf [ scalars (nonEmptyListOf scalars) ]); options.sv_public = lib.mkOption { type = lib.types.int; default = 0; example = [ (-1) 1 ]; description = lib.mdDoc '' Controls whether the server will be publicly listed. ''; }; options.hostname = lib.mkOption { type = lib.types.singleLineStr; default = "Xonotic $g_xonoticversion Server"; description = lib.mdDoc '' The name that will appear in the server list. `$g_xonoticversion` gets replaced with the current version. ''; }; options.sv_motd = lib.mkOption { type = lib.types.singleLineStr; default = ""; description = lib.mdDoc '' Text displayed when players join the server. ''; }; options.sv_termsofservice_url = lib.mkOption { type = lib.types.singleLineStr; default = ""; description = lib.mdDoc '' URL for the Terms of Service for playing on your server. ''; }; options.maxplayers = lib.mkOption { type = lib.types.int; default = 16; description = lib.mdDoc '' Number of player slots on the server, including spectators. ''; }; options.net_address = lib.mkOption { type = lib.types.singleLineStr; default = "0.0.0.0"; description = lib.mdDoc '' The address Xonotic will listen on. ''; }; options.port = lib.mkOption { type = lib.types.port; default = 26000; description = lib.mdDoc '' The port Xonotic will listen on. ''; }; }; }; # Still useful even though we're using RFC 42 settings because *some* keys # can be repeated. appendConfig = lib.mkOption { type = with lib.types; nullOr lines; default = null; description = lib.mdDoc '' Literal text to insert at the end of `server.cfg`. ''; }; # Certain changes need to happen at the beginning of the file. prependConfig = lib.mkOption { type = with lib.types; nullOr lines; default = null; description = lib.mdDoc '' Literal text to insert at the start of `server.cfg`. ''; }; }; config = lib.mkIf cfg.enable { systemd.services.xonotic = { description = "Xonotic server"; wantedBy = [ "multi-user.target" ]; environment = { # Required or else it tries to write the lock file into the nix store HOME = cfg.dataDir; }; serviceConfig = { DynamicUser = true; User = "xonotic"; StateDirectory = "xonotic"; ExecStart = "${cfg.package}/bin/xonotic-dedicated"; # Symlink the configuration from the nix store to where Xonotic actually # looks for it ExecStartPre = [ "${pkgs.coreutils}/bin/mkdir -p ${cfg.dataDir}/.xonotic/data" '' ${pkgs.coreutils}/bin/ln -sf ${serverCfg} \ ${cfg.dataDir}/.xonotic/data/server.cfg '' ]; # Cargo-culted from search results about writing Xonotic systemd units ExecReload = "${pkgs.util-linux}/bin/kill -HUP $MAINPID"; Restart = "on-failure"; RestartSec = 10; StartLimitBurst = 5; }; }; networking.firewall.allowedTCPPorts = lib.mkIf cfg.openFirewall [ cfg.settings.port ]; networking.firewall.allowedUDPPorts = lib.mkIf cfg.openFirewall [ cfg.settings.port ]; }; meta.maintainers = with lib.maintainers; [ CobaltCause ]; }