server-config/services/minecraft.nix

{
  pkgs,
  service_configs,
  lib,
  config,
  ...
}:
{
  imports = [
    (lib.serviceMountDeps "minecraft-server-${service_configs.minecraft.server_name}" [
      "${service_configs.minecraft.parent_dir}/${service_configs.minecraft.server_name}"
    ])
    (lib.serviceDependZpool "minecraft-server-${service_configs.minecraft.server_name}" service_configs.zpool_ssds)
  ];

  environment.systemPackages = [
    (pkgs.writeScriptBin "mc-console" ''
      #!/bin/sh
      ${pkgs.tmux}/bin/tmux -S /run/minecraft/${service_configs.minecraft.server_name}.sock attach
    '')
  ];

  nixpkgs.config.allowUnfreePredicate =
    pkg:
    builtins.elem (lib.getName pkg) [
      "minecraft-server"
    ];

  services.minecraft-servers = {
    enable = true;
    eula = true;
    dataDir = service_configs.minecraft.parent_dir;
    openFirewall = true;

    servers.${service_configs.minecraft.server_name} = {
      enable = true;
      package = pkgs.fabricServers.fabric-1_21_10;

      jvmOpts =
        let
          heap_size = "4000M";
        in
        "-Xmx${heap_size} -Xms${heap_size} -XX:+UseZGC -XX:+ZGenerational";

      serverProperties = {
        server-port = 25565;
        enforce-whitelist = true;
        gamemode = "survival";
        white-list = true;
        difficulty = "easy";
        motd = "A Minecraft Server";
        view-distance = 10;
        simulation-distance = 6;
        sync-chunk-writes = false;
        spawn-protection = 0;
      };

      whitelist = import ../secrets/minecraft-whitelist.nix;

      symlinks = {
        "mods" = pkgs.linkFarmFromDrvs "mods" (
          with pkgs;
          builtins.attrValues {
            FabricApi = fetchurl {
              url = "https://cdn.modrinth.com/data/P7dR8mSH/versions/lxeiLRwe/fabric-api-0.136.0%2B1.21.10.jar";
              sha512 = "d6ad5afeb57dc6dbe17a948990fc8441fbbc13a748814a71566404d919384df8bd7abebda52a58a41eb66370a86b8c4f910b64733b135946ecd47e53271310b5";
            };

            FerriteCore = fetchurl {
              url = "https://cdn.modrinth.com/data/uXXizFIs/versions/CtMpt7Jr/ferritecore-8.0.0-fabric.jar";
              sha512 = "131b82d1d366f0966435bfcb38c362d604d68ecf30c106d31a6261bfc868ca3a82425bb3faebaa2e5ea17d8eed5c92843810eb2df4790f2f8b1e6c1bdc9b7745";
            };

            Lithium = fetchurl {
              url = "https://cdn.modrinth.com/data/gvQqBUqZ/versions/oGKQMdyZ/lithium-fabric-0.20.0%2Bmc1.21.10.jar";
              sha512 = "755c0e0fc7f6f38ac4d936cc6023d1dce6ecfd8d6bdc2c544c2a3c3d6d04f0d85db53722a089fa8be72ae32fc127e87f5946793ba6e8b4f2c2962ed30d333ed2";
            };

            NoChatReports = fetchurl {
              url = "https://cdn.modrinth.com/data/qQyHxfxd/versions/LhwpK0O6/NoChatReports-FABRIC-1.21.7-v2.14.0.jar";
              sha512 = "6e93c822e606ad12cb650801be1b3f39fcd2fef64a9bb905f357eb01a28451afddb3a6cadb39c112463519df0a07b9ff374d39223e9bf189aee7e7182077a7ae";
            };

            squaremap = fetchurl {
              url = "https://cdn.modrinth.com/data/PFb7ZqK6/versions/f4ZOYenB/squaremap-fabric-mc1.21.10-1.3.9.jar";
              sha512 = "ddc2105568cb935eb269cfbb82b601189aa0c6c5ac98240188a3196e3e8454c23af86e95765153bd72285e9728dd8d0e587b4bcc3967f2636c5139f363e05f97";
            };

            scalablelux = fetchurl {
              url = "https://cdn.modrinth.com/data/Ps1zyz6x/versions/PV9KcrYQ/ScalableLux-0.1.6%2Bfabric.c25518a-all.jar";
              sha512 = "729515c1e75cf8d9cd704f12b3487ddb9664cf9928e7b85b12289c8fbbc7ed82d0211e1851375cbd5b385820b4fedbc3f617038fff5e30b302047b0937042ae7";
            };

            c2me = fetchurl {
              url = "https://cdn.modrinth.com/data/VSNURh3q/versions/eY3dbqLu/c2me-fabric-mc1.21.10-0.3.5.0.0.jar";
              sha512 = "a3422b75899a9355aa13128651ed2815ff83ff698c4c22a94ea7f275c656aff247440085a47de20353ff54469574c84adc9b428c2e963a80a3c6657fb849825d";
            };

            krypton = fetchurl {
              url = "https://cdn.modrinth.com/data/fQEb0iXm/versions/O9LmWYR7/krypton-0.2.10.jar";
              sha512 = "4dcd7228d1890ddfc78c99ff284b45f9cf40aae77ef6359308e26d06fa0d938365255696af4cc12d524c46c4886cdcd19268c165a2bf0a2835202fe857da5cab";
            };

            better-fabric-console = fetchurl {
              url = "https://cdn.modrinth.com/data/Y8o1j1Sf/versions/fZprQjU4/better-fabric-console-mc1.21.10-1.2.7.jar";
              sha512 = "0321e4a687ba5ed4dcb081aa48909d45c4e153f8b6217cd807f280f33250151b97ac80a122a83d48535c788d3c1e08a7ee882da3b20cf06021e03c1ddc943278";
            };

            disconnect-packet-fix = fetchurl {
              url = "https://cdn.modrinth.com/data/rd9rKuJT/versions/Gv74xveQ/disconnect-packet-fix-fabric-2.0.0.jar";
              sha512 = "1fd6f09a41ce36284e1a8e9def53f3f6834d7201e69e54e24933be56445ba569fbc26278f28300d36926ba92db6f4f9c0ae245d23576aaa790530345587316db";
            };

            packet-fixer = fetchurl {
              url = "https://cdn.modrinth.com/data/c7m1mi73/versions/5Qk1yjvA/packetfixer-fabric-3.3.1-1.21.10.jar";
              sha512 = "a57ee4a4b9f75c1cedafb191d0eb3da419962f08145ccbd9d6544b7e91b72a52aba1eebeb76d60fb23bf0177472473a90097c2d73306f698aff084cd9a290af8";
            };
          }
        );
      };
    };
  };

  services.caddy.virtualHosts = lib.mkIf (config.services.caddy.enable) {
    "map.${service_configs.https.domain}".extraConfig = ''
      root * ${service_configs.minecraft.parent_dir}/${service_configs.minecraft.server_name}/squaremap/web
      file_server browse
    '';
  };

  users.users = lib.mkIf (config.services.caddy.enable) {
    ${config.services.caddy.user}.extraGroups = [
      # for `map.gardling.com`
      config.services.minecraft-servers.group
    ];
  };

  systemd.tmpfiles.rules = [
    "Z ${service_configs.minecraft.parent_dir}/${service_configs.minecraft.server_name} 700 ${config.services.minecraft-servers.user} ${config.services.minecraft-servers.group}"
    "Z ${service_configs.minecraft.parent_dir}/${service_configs.minecraft.server_name}/squaremap/web 750 ${config.services.minecraft-servers.user} ${config.services.minecraft-servers.group}"
  ];
}