module: remove tmux-minecraft-server
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# Derived from nixpkgs/nixos/modules/services/games/minecraft-server.nix
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{ config, lib, pkgs, ... }:
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with lib;
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with lib.hlissner;
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let
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cfg = config.services.tmux-minecraft-server;
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tmux = "${getBin pkgs.tmux}/bin/tmux";
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server = "${cfg.package}/bin/minecraft-server";
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stopScript = pkgs.writeScript "minecraft-stop" ''
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#!${pkgs.runtimeShell}
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if ! [ -d "/proc/$1" ]; then
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exit 0
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fi
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${tmux} -S /run/minecraft/server.sock send-keys stop Enter
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'';
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files = {
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# We don't allow eula=false anyways
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eula = builtins.toFile "eula.txt" ''
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# eula.txt managed by NixOS Configuration
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eula=true
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'';
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whitelist = pkgs.writeText "whitelist.json"
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(builtins.toJSON
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(mapAttrsToList (n: v: { name = n; uuid = v; }) cfg.whitelist));
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serverProperties =
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let
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cfgToString = v: if builtins.isBool v then boolToString v else toString v;
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in
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pkgs.writeText "server.properties" (''
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# server.properties managed by NixOS configuration
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'' + concatStringsSep "\n" (mapAttrsToList
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(n: v: "${n}=${cfgToString v}")
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cfg.serverProperties));
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};
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ports = {
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server = cfg.serverProperties.server-port or 25565;
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rcon =
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if cfg.serverProperties.enable-rcon or false
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then cfg.serverProperties."rcon.port" or 25575
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else null;
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query =
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if cfg.serverProperties.enable-query or false
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then cfg.serverProperties."query.port" or 25565
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else null;
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};
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in
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{
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options.services.tmux-minecraft-server = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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If enabled, start a Minecraft Server. The server
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data will be loaded from and saved to
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<option>services.minecraft-server.dataDir</option>.
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'';
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};
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eula = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether you agree to
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<link xlink:href="https://account.mojang.com/documents/minecraft_eula">
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Mojangs EULA</link>. This option must be set to
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<literal>true</literal> to run Minecraft server.
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'';
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};
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dataDir = mkOption {
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type = types.path;
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default = "/var/lib/minecraft";
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description = ''
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Directory to store Minecraft database and other state/data files.
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'';
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};
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openFirewall = mkOption {
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type = types.bool;
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default = false;
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description = ''
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Whether to open ports in the firewall for the server.
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'';
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};
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whitelist = mkOption {
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type =
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let
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minecraftUUID = types.strMatching
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"[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}" // {
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description = "Minecraft UUID";
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};
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in
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types.attrsOf minecraftUUID;
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default = { };
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description = ''
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Whitelisted players, only has an effect when
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<option>services.minecraft-server.declarative</option> is
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<literal>true</literal> and the whitelist is enabled
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via <option>services.minecraft-server.serverProperties</option> by
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setting <literal>white-list</literal> to <literal>true</literal>.
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This is a mapping from Minecraft usernames to UUIDs.
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You can use <link xlink:href="https://mcuuid.net/"/> to get a
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Minecraft UUID for a username.
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'';
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example = literalExpression ''
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{
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username1 = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx";
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username2 = "yyyyyyyy-yyyy-yyyy-yyyy-yyyyyyyyyyyy";
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};
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'';
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};
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serverProperties = mkOption {
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type = with types; attrsOf (oneOf [ bool int str ]);
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default = { };
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example = literalExpression ''
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{
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server-port = 43000;
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difficulty = 3;
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gamemode = 1;
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max-players = 5;
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motd = "NixOS Minecraft server!";
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white-list = true;
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enable-rcon = true;
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"rcon.password" = "hunter2";
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}
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'';
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description = ''
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Minecraft server properties for the server.properties file. Only has
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an effect when <option>services.minecraft-server.declarative</option>
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is set to <literal>true</literal>. See
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<link xlink:href="https://minecraft.gamepedia.com/Server.properties#Java_Edition_3"/>
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for documentation on these values.
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'';
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};
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package = mkOption {
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type = types.package;
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default = pkgs.minecraft-server;
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defaultText = literalExpression "pkgs.minecraft-server";
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example = literalExpression "pkgs.minecraft-server_1_12_2";
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description = "Version of minecraft-server to run.";
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};
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jvmOpts = mkOption {
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type = types.separatedString " ";
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default = "-Xmx2048M -Xms2048M";
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# Example options from https://minecraft.gamepedia.com/Tutorials/Server_startup_script
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example = "-Xmx2048M -Xms4092M -XX:+UseG1GC -XX:+CMSIncrementalPacing "
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+ "-XX:+CMSClassUnloadingEnabled -XX:ParallelGCThreads=2 "
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+ "-XX:MinHeapFreeRatio=5 -XX:MaxHeapFreeRatio=10";
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description = "JVM options for the Minecraft server.";
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};
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};
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config = mkIf cfg.enable {
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users.users.minecraft = {
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description = "Minecraft server service user";
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home = cfg.dataDir;
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createHome = true;
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isSystemUser = true;
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group = "minecraft";
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};
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users.groups.minecraft = { };
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systemd.services.minecraft-server = {
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description = "Minecraft Server Service";
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wantedBy = [ "multi-user.target" ];
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after = [ "network.target" ];
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serviceConfig = {
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ExecStart = ''${tmux} -S /run/minecraft/server.sock new -d ${server} ${cfg.jvmOpts}'';
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ExecStop = "${stopScript} $MAINPID";
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Restart = "always";
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User = "minecraft";
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Type = "forking";
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RuntimeDirectory = "minecraft";
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GuessMainPID = true;
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WorkingDirectory = cfg.dataDir;
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};
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preStart = with files; ''
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ln -sf ${eula} eula.txt
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ln -sf ${whitelist} whitelist.json
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cp -f ${serverProperties} server.properties
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'';
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postStart = ''
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${pkgs.coreutils}/bin/chmod 770 ${cfg.dataDir}
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${pkgs.coreutils}/bin/chmod 660 /run/minecraft/server.sock
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${pkgs.coreutils}/bin/chgrp minecraft /run/minecraft/server.sock
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'';
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};
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networking.firewall = mkIf cfg.openFirewall (with ports; {
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allowedUDPPorts = [ server ];
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allowedTCPPorts = [ server ]
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++ optional (query != null) query
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++ optional (rcon != null) rcon;
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});
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assertions = [
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{
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assertion = cfg.eula;
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message = "You must agree to Mojangs EULA to run minecraft-server."
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+ " Read https://account.mojang.com/documents/minecraft_eula and"
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+ " set `services.minecraft-server.eula` to `true` if you agree.";
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}
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];
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};
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}
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