This neoforge server isn't freaking working

nixos/server/minecraft/common.nix

@@ -25,7 +25,7 @@
   };
 
   # Common plugins
-  symlinks = {
+  paperSymlinks = {
     "plugins/Backuper.jar" = builtins.fetchurl {
       url = "https://cdn.modrinth.com/data/7cMAqMND/versions/nkcNIvUw/Backuper-3.0.1.jar";
       sha256 = "081hvs7khd9s8598i59ai8n0idp85rgc89m9hpfajwym9rmy7il4";
@@ -58,8 +58,10 @@
       url = "https://cdn.modrinth.com/data/9eGKb6K1/versions/nS19YToN/voicechat-bukkit-2.5.20.jar";
       sha256 = "023wjx0zxf9rc2x9vsqg398wapz0nlwfs5g6c8pci3qx75i5s4jx";
     };
+  };
 
-    # Config files
+  # Config files
+  configSymlinks = {
     "plugins/Essentials/config.yml" = ./essentialsconfig.yml;
     "plugins/voicechat/voicechat-server.properties" = ./vcserver.properties;
   };

nixos/server/minecraft/default.nix

@@ -6,6 +6,7 @@
     ./servers/johnside.nix
     ./servers/blockworld.nix
     ./servers/uberbeta.nix
+    #./servers/freaktards.nix
   ];
   nixpkgs.overlays = [ inputs.nix-minecraft.overlay ];
 

nixos/server/minecraft/servers/blockworld.nix

@@ -5,13 +5,13 @@ in {
     enable = true;
     autoStart = false;
     package = pkgs.paperServers.paper-1_21_1;
-    jvmOpts = "-Xmx4084M";
+    jvmOpts = "-Xmx3072M";
     serverProperties = common.serverProperties // {
       difficulty = 2;
       server-port = 30012;
       motd = "§fArchival §l§n§cBloxelcom §r§fMinecraft server.";
     };
     whitelist = common.whitelist;
-    symlinks = common.symlinks;
+    symlinks = common.paperSymlinks // common.configSymlinks;
   };
 }

nixos/server/minecraft/servers/dewdemolisher.nix

@@ -4,13 +4,13 @@ in {
   services.minecraft-servers.servers.dewdemolisher = {
     enable = true;
     package = pkgs.paperServers.paper-1_21_1;
-    jvmOpts = "-Xmx4084M";
+    jvmOpts = "-Xmx3072M";
     serverProperties = common.serverProperties // {
       difficulty = 2;
       server-port = 30010;
       motd = "§l§aDew Demolisher is here.";
     };
     whitelist = common.whitelist;
-    symlinks = common.symlinks;
+    symlinks = common.paperSymlinks // common.configSymlinks;
   };
 }

nixos/server/minecraft/servers/freaktards.nix

@@ -0,0 +1,18 @@
+{ pkgs, ... }: let
+  common = import ../common.nix { inherit pkgs; };
+  neoForge = pkgs.writeShellScriptBin "minecraft-server" ''
+    ${pkgs.temurin-jre-bin}/bin/java @user_jvm_args.txt @libraries/net/neoforged/neoforge/21.1.51/unix_args.txt "$@"
+  '';
+in {
+  services.minecraft-servers.servers.freaktards = {
+    enable = true;
+    package = neoForge;
+    serverProperties = common.serverProperties // {
+      difficulty = 1;
+      server-port = 30013;
+      motd = "\\u00A7l\\u00A7o𝓯𝓻𝓮𝓪𝓴\\u00A7r\\u00A7ltards official™️";
+    };
+    whitelist = common.whitelist;
+    symlinks = common.configSymlinks;
+  };
+}

nixos/server/minecraft/servers/johnside.nix

@@ -5,14 +5,14 @@ in {
     minecraft-servers.servers.johnside = {
       enable = true;
       package = pkgs.paperServers.paper-1_20_6;
-      jvmOpts = "-Xmx4084M";
+      jvmOpts = "-Xmx3072M";
       serverProperties = common.serverProperties // {
         difficulty = 2;
         server-port = 30009;
         motd = "§l§9Johnside SMP§r §l§fworld for §4John lovers only.";
       };
       whitelist = common.whitelist;
-      symlinks = common.symlinks // {
+      symlinks = common.paperSymlinks // common.configSymlinks // {
         "plugins/BlueMap.jar" = builtins.fetchurl {
           url = "https://cdn.modrinth.com/data/swbUV1cr/versions/TL5ElRWX/BlueMap-5.3-spigot.jar";
           sha256 = "08ls3wk0333vjg49kcmri884pcgm2xk9xdhwcxyffbh4ra0xrlbw";

pkgs/default.nix

@@ -1,7 +1,6 @@
-# Custom packages, that can be defined similarly to ones from nixpkgs
+# Custom packages, that can be defined similarly to nixpkgs
-# You can build them using 'nix build .#example'
 {pkgs, ...}: {
-  # pkgs
   xash3d = pkgs.callPackage ./xash/xash3d.nix {};
   hlsdk  = pkgs.callPackage ./xash/hlsdk.nix {};
+  forgeServers = pkgs.callPackage ./forge-servers/default.nix {};
 }

pkgs/forge-servers/default.nix

@@ -0,0 +1,53 @@
+# based on:
+# - https://github.com/Infinidoge/nix-minecraft/blob/ab4790259bf8ed20f4417de5a0e5ee592094c7c3/pkgs/fabric-servers/default.nix
+# - https://github.com/Faeranne/nix-minecraft/blob/f4e4514f1d65b6a19704eab85070741e40c1d272/pkgs/forge-servers/default.nix
+{ callPackage
+, lib
+, jre8_headless
+, jre_headless
+}:
+with lib;
+let
+  loader_versions = lib.importJSON ./lock_launcher.json;
+
+  # Older Minecraft versions that were written for Java 8, required Java 8.
+  # Mojang has since rewritten a lot of their codebase so that Java versions
+  # are no longer as important for stability as they used to be. Meaning we can
+  # target latest the latest JDK for all newer versions of Minecraft.
+  # TODO: Assert that jre_headless >= java version
+  getJavaVersion = v: if v == 8 then jre8_headless else jre_headless;
+
+  # Copied from https://github.com/Infinidoge/nix-minecraft/blob/ab4790259bf8ed20f4417de5a0e5ee592094c7c3/lib/default.nix
+  chain = {
+    func = id;
+    __functor = self: input:
+      if (typeOf input) == "lambda"
+      then self // { func = e: input (self.func e); }
+      else self.func input;
+  };
+
+  escapeVersion = replaceStrings [ "." " " ] [ "_" "_" ];
+
+  isNormalVersion = v: isList (match "([[:digit:]]+\.[[:digit:]]+(\.[[:digit:]]+)?)" v);
+
+  latestVersion = versions: chain
+    (filter isNormalVersion)
+    (sort versionOlder)
+    last
+    (attrNames versions);
+  #####
+
+  mkServer = gameVersion: (callPackage ./server.nix {
+    inherit gameVersion;
+    loaderVersion = latestVersion loader_versions.${gameVersion};
+    jre_headless = getJavaVersion 17;
+    loaderDrv = ./derivation.nix;
+    extraJavaArgs = "-Dlog4j.configurationFile=${./log4j.xml}";
+  });
+
+  gameVersions = attrNames loader_versions;
+
+  packagesRaw = lib.genAttrs gameVersions mkServer;
+  packages = lib.mapAttrs' (version: drv: nameValuePair "forge-${escapeVersion version}" drv) packagesRaw;
+in
+packages

pkgs/forge-servers/derivation.nix

@@ -0,0 +1,148 @@
+# based on:
+# - https://github.com/Faeranne/nix-minecraft/blob/f4e4514f1d65b6a19704eab85070741e40c1d272/pkgs/forge-servers/derivation.nix
+# - https://github.com/Infinidoge/nix-minecraft/blob/ab4790259bf8ed20f4417de5a0e5ee592094c7c3/pkgs/build-support/mkTextileLoader.nix
+#
+# Locks (lock_game.json, lock_launcher.json, lock_libraries.json)
+# are copied from https://github.com/Faeranne/nix-minecraft/tree/f4e4514f1d65b6a19704eab85070741e40c1d272/pkgs/forge-servers
+#
+# Locks are modified to have only one version of Forge (1.20.1-47.3.1)
+# I didn't want to deal with many versions of Forge
+{ lib
+, stdenvNoCC
+, fetchurl
+, gameVersion
+, loaderVersion
+, jre_headless
+, jq
+}:
+let
+  minecraftInfo = (lib.importJSON ./lock_game.json).${gameVersion};
+
+  forge-installer = "forge-${gameVersion}-${loaderVersion}-installer";
+
+  mappingsInfo = minecraftInfo.mappings;
+  mappings = fetchurl {
+    name = "minecraft-mappings";
+    version = "${gameVersion}";
+    inherit (mappingsInfo) sha1 url;
+  };
+
+  vanillaInfo = minecraftInfo.server;
+  vanilla = fetchurl {
+    name = "vanilla-server";
+    version = "${gameVersion}";
+    inherit (vanillaInfo) sha1 url;
+  };
+
+  loader = (lib.importJSON ./lock_launcher.json).${gameVersion}.${loaderVersion};
+  libraries = minecraftInfo.libraries;
+  libraries_lock = lib.importJSON ./lock_libraries.json;
+  fetchedLibraries = lib.forEach libraries (l:
+    let
+      library = libraries_lock.${l};
+    in
+    fetchurl {
+      inherit (library) url sha1;
+    }
+  );
+in
+stdenvNoCC.mkDerivation {
+  pname = "forge-loader";
+  version = "${gameVersion}-${loaderVersion}";
+
+  libraries = fetchedLibraries;
+
+  src = fetchurl {
+    name = forge-installer;
+    inherit (loader) url;
+    hash = loader.md5;
+  };
+
+  preferLocalBuild = true;
+
+  installPhase = if (loader.type == "installer") then (
+  let
+    libraries_path = lib.concatStringsSep " " (lib.forEach libraries (l: libraries_lock.${l}.path));
+  in
+  ''
+    LIB_PATHS=(${libraries_path})
+
+    mkdir $out
+
+    for i in $libraries; do
+      NIX_LIB=$(basename $i)
+      NIX_LIB_NAME="''${NIX_LIB:33}"
+
+      for l in ''${!LIB_PATHS[@]}; do
+        LIB="''${LIB_PATHS[$l]}"
+        LIB_NAME=$(basename $LIB)
+
+        if [[ $LIB_NAME == $NIX_LIB_NAME ]]; then
+          mkdir -p "$out/libraries/$(dirname $LIB)"
+          ln -s $i $out/libraries/$LIB
+
+          echo Linking library: $LIB_NAME
+
+          break
+        fi
+      done
+    done
+
+    MOJMAP_DIR_NAME=$(basename $out/libraries/de/oceanlabs/mcp/mcp_config/${gameVersion}-*)
+    echo $MOJMAP_DIR_NAME
+    MOJMAP_DIR=$out/libraries/net/minecraft/server/$MOJMAP_DIR_NAME
+    mkdir -p "$MOJMAP_DIR"
+
+    ln -s ${mappings} $MOJMAP_DIR/server-$MOJMAP_DIR_NAME-mappings.txt
+
+    MINECRAFT_LIB=$out/libraries/net/minecraft/server/${gameVersion}
+    mkdir -p "$MINECRAFT_LIB"
+
+    ln -s ${vanilla} $MINECRAFT_LIB/server-${gameVersion}.jar
+
+    cp $src $out/forge-installer.jar
+
+    echo Patching forge installer...
+    pushd $out
+
+    ${jre_headless}/bin/jar xf $out/forge-installer.jar install_profile.json
+
+    mv $out/install_profile.json $out/install_profile_original.json
+
+    ${lib.getExe jq} 'del(.processors[] | select(.args[1]=="DOWNLOAD_MOJMAPS"))' $out/install_profile_original.json > $out/install_profile.json
+    mkdir -p $out/META-INF
+    touch $out/META-INF/FORGE.RSA
+
+    ${jre_headless}/bin/jar uf $out/forge-installer.jar install_profile.json META-INF/FORGE.RSA
+
+    popd
+
+    rm $out/install_profile.json
+    rm $out/install_profile_original.json
+    rm -rf $out/META-INF
+
+    echo Running installer...
+    ${jre_headless}/bin/java -jar $out/forge-installer.jar --offline --installServer $out
+
+    echo Cleaning up...
+
+    rm $out/run.bat
+    rm $out/run.sh
+    rm $out/user_jvm_args.txt
+    rm $out/forge-installer.jar
+
+    substituteInPlace $out/libraries/net/minecraftforge/forge/1.20.1-47.3.1/unix_args.txt \
+      --replace libraries $out/libraries
+  '') else throw "Cannot work with other types of packaging than installer!";
+
+  dontUnpack = true;
+
+  meta = with lib; {
+    description = "Minecraft Server";
+    homepage = "https://minecraft.net";
+    license = licenses.unfreeRedistributable;
+    platforms = platforms.unix;
+    maintainers = with maintainers; [ infinidoge ];
+    mainProgram = "minecraft-server";
+  };
+}

pkgs/forge-servers/lock_game.json

@@ -0,0 +1,114 @@
+{
+    "1.21": {
+        "sha1": "177e49d3233cb6eac42f0495c0a48e719870c2ae",
+        "server": {
+            "sha1": "450698d1863ab5180c25d7c804ef0fe6369dd1ba",
+            "size": 51623779,
+            "url": "https://piston-data.mojang.com/v1/objects/450698d1863ab5180c25d7c804ef0fe6369dd1ba/server.jar"
+        },
+        "mappings": {
+            "sha1": "31c77994d96f05ba25a870ada70f47f315330437",
+            "size": 7454609,
+            "url": "https://piston-data.mojang.com/v1/objects/31c77994d96f05ba25a870ada70f47f315330437/server.txt"
+        },
+        "libraries": [
+            "ca.weblite:java-objc-bridge:1.1",
+            "com.github.oshi:oshi-core:6.4.10",
+            "com.google.code.gson:gson:2.10.1",
+            "com.google.guava:failureaccess:1.0.1",
+            "com.google.guava:guava:32.1.2-jre",
+            "com.ibm.icu:icu4j:73.2",
+            "com.mojang:authlib:6.0.54",
+            "com.mojang:blocklist:1.0.10",
+            "com.mojang:brigadier:1.2.9",
+            "com.mojang:datafixerupper:8.0.16",
+            "com.mojang:logging:1.2.7",
+            "com.mojang:patchy:2.2.10",
+            "com.mojang:text2speech:1.17.9",
+            "commons-codec:commons-codec:1.16.0",
+            "commons-io:commons-io:2.15.1",
+            "commons-logging:commons-logging:1.2",
+            "io.netty:netty-buffer:4.1.97.Final",
+            "io.netty:netty-codec:4.1.97.Final",
+            "io.netty:netty-common:4.1.97.Final",
+            "io.netty:netty-handler:4.1.97.Final",
+            "io.netty:netty-resolver:4.1.97.Final",
+            "io.netty:netty-transport-classes-epoll:4.1.97.Final",
+            "io.netty:netty-transport-native-epoll:4.1.97.Final:linux-aarch_64",
+            "io.netty:netty-transport-native-epoll:4.1.97.Final:linux-x86_64",
+            "io.netty:netty-transport-native-unix-common:4.1.97.Final",
+            "io.netty:netty-transport:4.1.97.Final",
+            "it.unimi.dsi:fastutil:8.5.12",
+            "net.java.dev.jna:jna-platform:5.14.0",
+            "net.java.dev.jna:jna:5.14.0",
+            "net.sf.jopt-simple:jopt-simple:5.0.4",
+            "org.apache.commons:commons-compress:1.26.0",
+            "org.apache.commons:commons-lang3:3.14.0",
+            "org.apache.httpcomponents:httpclient:4.5.13",
+            "org.apache.httpcomponents:httpcore:4.4.16",
+            "org.apache.logging.log4j:log4j-api:2.22.1",
+            "org.apache.logging.log4j:log4j-core:2.22.1",
+            "org.apache.logging.log4j:log4j-slf4j2-impl:2.22.1",
+            "org.jcraft:jorbis:0.0.17",
+            "org.joml:joml:1.10.5",
+            "org.lwjgl:lwjgl-freetype:3.3.3",
+            "org.lwjgl:lwjgl-freetype:3.3.3:natives-linux",
+            "org.lwjgl:lwjgl-freetype:3.3.3:natives-macos-arm64",
+            "org.lwjgl:lwjgl-freetype:3.3.3:natives-macos-patch",
+            "org.lwjgl:lwjgl-freetype:3.3.3:natives-windows",
+            "org.lwjgl:lwjgl-freetype:3.3.3:natives-windows-arm64",
+            "org.lwjgl:lwjgl-freetype:3.3.3:natives-windows-x86",
+            "org.lwjgl:lwjgl-glfw:3.3.3",
+            "org.lwjgl:lwjgl-glfw:3.3.3:natives-linux",
+            "org.lwjgl:lwjgl-glfw:3.3.3:natives-macos",
+            "org.lwjgl:lwjgl-glfw:3.3.3:natives-macos-arm64",
+            "org.lwjgl:lwjgl-glfw:3.3.3:natives-windows",
+            "org.lwjgl:lwjgl-glfw:3.3.3:natives-windows-arm64",
+            "org.lwjgl:lwjgl-glfw:3.3.3:natives-windows-x86",
+            "org.lwjgl:lwjgl-jemalloc:3.3.3",
+            "org.lwjgl:lwjgl-jemalloc:3.3.3:natives-linux",
+            "org.lwjgl:lwjgl-jemalloc:3.3.3:natives-macos",
+            "org.lwjgl:lwjgl-jemalloc:3.3.3:natives-macos-arm64",
+            "org.lwjgl:lwjgl-jemalloc:3.3.3:natives-windows",
+            "org.lwjgl:lwjgl-jemalloc:3.3.3:natives-windows-arm64",
+            "org.lwjgl:lwjgl-jemalloc:3.3.3:natives-windows-x86",
+            "org.lwjgl:lwjgl-openal:3.3.3",
+            "org.lwjgl:lwjgl-openal:3.3.3:natives-linux",
+            "org.lwjgl:lwjgl-openal:3.3.3:natives-macos",
+            "org.lwjgl:lwjgl-openal:3.3.3:natives-macos-arm64",
+            "org.lwjgl:lwjgl-openal:3.3.3:natives-windows",
+            "org.lwjgl:lwjgl-openal:3.3.3:natives-windows-arm64",
+            "org.lwjgl:lwjgl-openal:3.3.3:natives-windows-x86",
+            "org.lwjgl:lwjgl-opengl:3.3.3",
+            "org.lwjgl:lwjgl-opengl:3.3.3:natives-linux",
+            "org.lwjgl:lwjgl-opengl:3.3.3:natives-macos",
+            "org.lwjgl:lwjgl-opengl:3.3.3:natives-macos-arm64",
+            "org.lwjgl:lwjgl-opengl:3.3.3:natives-windows",
+            "org.lwjgl:lwjgl-opengl:3.3.3:natives-windows-arm64",
+            "org.lwjgl:lwjgl-opengl:3.3.3:natives-windows-x86",
+            "org.lwjgl:lwjgl-stb:3.3.3",
+            "org.lwjgl:lwjgl-stb:3.3.3:natives-linux",
+            "org.lwjgl:lwjgl-stb:3.3.3:natives-macos",
+            "org.lwjgl:lwjgl-stb:3.3.3:natives-macos-arm64",
+            "org.lwjgl:lwjgl-stb:3.3.3:natives-windows",
+            "org.lwjgl:lwjgl-stb:3.3.3:natives-windows-arm64",
+            "org.lwjgl:lwjgl-stb:3.3.3:natives-windows-x86",
+            "org.lwjgl:lwjgl-tinyfd:3.3.3",
+            "org.lwjgl:lwjgl-tinyfd:3.3.3:natives-linux",
+            "org.lwjgl:lwjgl-tinyfd:3.3.3:natives-macos",
+            "org.lwjgl:lwjgl-tinyfd:3.3.3:natives-macos-arm64",
+            "org.lwjgl:lwjgl-tinyfd:3.3.3:natives-windows",
+            "org.lwjgl:lwjgl-tinyfd:3.3.3:natives-windows-arm64",
+            "org.lwjgl:lwjgl-tinyfd:3.3.3:natives-windows-x86",
+            "org.lwjgl:lwjgl:3.3.3",
+            "org.lwjgl:lwjgl:3.3.3:natives-linux",
+            "org.lwjgl:lwjgl:3.3.3:natives-macos",
+            "org.lwjgl:lwjgl:3.3.3:natives-macos-arm64",
+            "org.lwjgl:lwjgl:3.3.3:natives-windows",
+            "org.lwjgl:lwjgl:3.3.3:natives-windows-arm64",
+            "org.lwjgl:lwjgl:3.3.3:natives-windows-x86",
+            "org.lz4:lz4-java:1.8.0",
+            "org.slf4j:slf4j-api:2.0.9"
+        ]
+    }
+}

pkgs/forge-servers/lock_launcher.json

@@ -0,0 +1,9 @@
+{
+    "1.21.1": {
+        "47.3.1": {
+            "type": "installer",
+            "url": "https://maven.neoforged.net/releases/net/neoforged/neoforge/21.1.54/neoforge-21.1.54-installer.jar",
+            "md5": "md5-ucnga+57fSrZVDGMesAUpg=="
+        }
+    }
+}

pkgs/forge-servers/log4j.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration status="WARN" packages="com.mojang.util">
+    <Appenders>
+        <Console name="SysOut" target="SYSTEM_OUT">
+            <PatternLayout pattern="[%d{HH:mm:ss}] [%t/%level]: %msg%n" />
+        </Console>
+        <Queue name="ServerGuiConsole">
+            <PatternLayout pattern="[%d{HH:mm:ss} %level]: %msg%n" />
+        </Queue>
+        <RollingRandomAccessFile name="File" fileName="logs/latest.log" filePattern="logs/%d{yyyy-MM-dd}-%i.log.gz">
+            <PatternLayout pattern="[%d{HH:mm:ss}] [%t/%level]: %msg%n" />
+            <Policies>
+                <TimeBasedTriggeringPolicy />
+                <OnStartupTriggeringPolicy />
+            </Policies>
+            <DefaultRolloverStrategy max="1000"/>
+        </RollingRandomAccessFile>
+    </Appenders>
+    <Loggers>
+        <Root level="info">
+            <filters>
+                <MarkerFilter marker="NETWORK_PACKETS" onMatch="DENY" onMismatch="NEUTRAL" />
+            </filters>
+            <AppenderRef ref="SysOut"/>
+            <AppenderRef ref="File"/>
+            <AppenderRef ref="ServerGuiConsole"/>
+        </Root>
+    </Loggers>
+</Configuration>

pkgs/forge-servers/server.nix

@@ -0,0 +1,23 @@
+# based on https://github.com/Infinidoge/nix-minecraft/blob/master/pkgs/build-support/mkTextileServer.nix
+{ callPackage
+, lib
+, writeShellScriptBin
+, gameVersion
+, jre_headless
+, loaderVersion
+, loaderDrv
+, loader ? (callPackage loaderDrv { inherit loaderVersion gameVersion jre_headless; })
+, extraJavaArgs ? ""
+, extraMinecraftArgs ? ""
+}:
+(writeShellScriptBin "minecraft-server" ''
+  exec ${lib.getExe jre_headless} ${extraJavaArgs} $@ @${loader}/libraries/net/minecraftforge/forge/${gameVersion}-${loaderVersion}/unix_args.txt nogui ${extraMinecraftArgs}''
+) // rec {
+  pname = "minecraft-server";
+  version = "${gameVersion}-forge-${loaderVersion}";
+  name = "${pname}-${version}";
+
+  passthru = {
+    inherit loader;
+  };
+}