server-config/services/minecraft.nix

{
  pkgs,
  service_configs,
  lib,
  username,
  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/qNm2IWMn/fabric-api-0.135.0%2B1.21.10.jar";
              sha512 = "7a3e442ab69be2ce8413580a198e13c87f1135699b5549a12a31b82dc9ddfa9b6731d774ebc36c752387010c51d018ac6aa85fcadfcb6254df8144d7e71235aa";
            };

            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/PQLHDg2Q/ScalableLux-0.1.5%2Bfabric.e4acdcb-all.jar";
              sha512 = "ec8fabc3bf991fbcbe064c1e97ded3e70f145a87e436056241cbb1e14c57ea9f59ef312f24c205160ccbda43f693e05d652b7f19aa71f730caec3bb5f7f7820a";
            };

            c2me = fetchurl {
              url = "https://cdn.modrinth.com/data/VSNURh3q/versions/Bl0VOr1e/c2me-fabric-mc1.21.10-0.3.5%2Bbeta.1.0.jar";
              sha512 = "8ad90725b9cb79d567f8985e330c2da0a28f4cf9a3556ac078aa2bc4d0b68ca057417ec1f1fd42f92a04f76cdfe72ceab4e5cdec2bbaf443498884a5759d6ee4";
            };

            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/laxelUM5/better-fabric-console-mc1.21.10-1.2.6.jar";
              sha512 = "b458699a2f555db6fb150e7663188b54bc931e1e03c0dd35823aea570e55d0fa844b334ab9d9f605e038eeb65a71350ef2058cd105cca7c154920a8adec17d47";
            };

            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/V05RgbEn/packetfixer-3.3.0-1.20.5-1.21.X-merged.jar";
              sha512 = "17fd46a5edd2ecefb67f346fa1ddd8beebd119f9c1598e91211c5d8a4691ae118d81d6628cb39705c0cf1a4d1f09299b76f72c5d286ca5b707c2508633654c12";
            };
          }
        );
      };
    };
  };

  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}"
  ];
}