add papermc

default.nix

@@ -37,4 +37,5 @@
   mautrix-telegram = pkgs.callPackage ./matrix/mautrix-telegram {};
   python-mautrix = pkgs.python3Packages.callPackage ./python/mautrix.nix {};
   python-tulir-telethon = pkgs.python3Packages.callPackage ./python/tulir-telethon.nix {};
+  papermc = pkgs.callPackage ./minecraft/papermc {};
 }

lib/default.nix

@@ -1,3 +1,4 @@
 {pkgs, ...}: {
   mkPleromaEmoji = pkgs.callPackage ./mkPleromaEmoji.nix {};
+  gradleDeps = pkgs.callPackage ./gradleDeps.nix {};
 }

lib/gradleDeps.nix

@@ -0,0 +1,27 @@
+{
+  stdenv,
+  gradle,
+  openjdk_headless,
+  perl,
+  git,
+}: {
+  src,
+  sha256,
+  ...
+} @ args:
+stdenv.mkDerivation ({
+    nativeBuildInputs = [gradle openjdk_headless perl git];
+    buildPhase = ''
+      export GRADLE_USER_HOME=$(mktemp -d)
+      gradle --no-daemon --info -Dorg.gradle.java.home=${openjdk_headless} --write-verification-metadata sha256
+    '';
+    installPhase = ''
+      find $GRADLE_USER_HOME/caches/modules-2 -type f -regex '.*\.\(aar\|jar\|pom\|module\)$' \
+                | perl -pe 's#(.*/([^/]+)/([^/]+)/([^/]+)/[0-9a-f]{30,40}/([^/\s]+))$# ($x = $2) =~ tr|\.|/|; "install -Dm444 $1 \$out/maven/$x/$3/$4/$5" #e' \
+                | sh
+    '';
+    outputHashAlgo = "sha256";
+    outputHashMode = "recursive";
+    outputHash = sha256;
+  }
+  // args)

minecraft/paper.json

@@ -1,6 +0,0 @@
-{
-  "version": "1.19.2",
-  "build": 173,
-  "name": "paper-1.19.2-173.jar",
-  "sha256": "533c31763ae447dcd01123bc076869e68fd89b354c65aae0a9b2d128eb84e46f"
-}

minecraft/paper.nix

@@ -1,30 +0,0 @@
-{pkgs, ...}: let
-  version-info = builtins.fromJSON (builtins.readFile ./paper.json);
-  pname = "paper";
-  mcVersion = version-info.version;
-  buildNum = toString version-info.build;
-in rec {
-  paper-jar = pkgs.fetchurl {
-    url = "https://papermc.io/api/v2/projects/paper/versions/${mcVersion}/builds/${buildNum}/downloads/${version-info.name}";
-    inherit (version-info) sha256;
-  };
-  papermc = pkgs.stdenvNoCC.mkDerivation {
-    pname = "papermc";
-    version = "${mcVersion}-${buildNum}";
-
-    dontUnpack = true;
-    dontConfigure = true;
-
-    buildPhase = ''
-      cat > minecraft-server << EOF
-      #!${pkgs.bash}/bin/sh
-      exec ${pkgs.openjdk17_headless}/bin/java \$@ -jar $out/share/papermc/papermc.jar nogui
-    '';
-
-    installPhase = ''
-      mkdir -p $out/share/papermc
-      ln -s ${paper-jar} $out/share/papermc/papermc.jar
-      install -Dm555 -t $out/bin minecraft-server
-    '';
-  };
-}

minecraft/papermc-from-source/build.patch

@@ -0,0 +1,35 @@
+diff --git a/build.gradle.kts b/build.gradle.kts
+index 5341c25fb..7450bb8f8 100644
+--- a/build.gradle.kts
++++ b/build.gradle.kts
+@@ -4,7 +4,6 @@ import org.gradle.api.tasks.testing.logging.TestLogEvent
+ plugins {
+     java
+     `maven-publish`
+-    id("com.github.johnrengelman.shadow") version "7.1.2" apply false
+     id("io.papermc.paperweight.core") version "1.3.8"
+ }
+ 
+diff --git a/settings.gradle.kts b/settings.gradle.kts
+index 18cf95a32..91037a630 100644
+--- a/settings.gradle.kts
++++ b/settings.gradle.kts
+@@ -7,6 +7,18 @@ pluginManagement {
+     }
+ }
+ 
++buildscript {
++  repositories {
++    gradlePluginPortal()
++    maven {
++      url = uri("https://plugins.gradle.org/m2/")
++    }
++  }
++  dependencies {
++    classpath("gradle.plugin.com.github.johnrengelman:shadow:7.1.2")
++  }
++}
++
+ rootProject.name = "paper"
+ 
+ for (name in listOf("Paper-API", "Paper-Server", "Paper-MojangAPI")) {

minecraft/papermc-from-source/default.nix

@@ -0,0 +1,32 @@
+{
+  stdenv,
+  callPackage,
+  gradle,
+  openjdk_headless,
+  git,
+}: let
+  src = callPackage ./source.nix {};
+  deps = callPackage ./deps.nix {};
+in
+  stdenv.mkDerivation {
+    pname = "papermc";
+    version = src.passthru.source.date;
+    inherit src;
+    nativeBuildInputs = [
+      gradle
+      openjdk_headless
+      git
+    ];
+    patchPhase = ''
+      sed -i 's#mavenCentral..#maven("${deps}/maven")#g' build.gradle.kts
+      sed -i 's#gradlePluginPortal..#maven("${deps}/maven")#g' settings.gradle.kts
+    '';
+    buildPhase = ''
+      export GRADLE_USER_HOME=$(mktemp -d)
+      gradle --offline --no-daemon --debug -Dorg.gradle.java.home=${openjdk_headless} applyPatches
+      gradle --offline --no-daemon --info -Dorg.gradle.java.home=${openjdk_headless} createReobfBundlerJar
+    '';
+    installPhase = ''
+      find build/lib
+    '';
+  }

minecraft/papermc-from-source/deps.hash

@@ -0,0 +1 @@
+sha256-w9lNjuMZiiuB73+e95phSu31IldeDowgv8eXRKcF/tg=

minecraft/papermc-from-source/deps.nix

@@ -0,0 +1,15 @@
+{
+  callPackage,
+  writeScript,
+}: let
+  src = callPackage ./source.nix {};
+  gradleDeps = callPackage ../../lib/gradleDeps.nix {};
+in (gradleDeps {
+  pname = "paper-deps";
+  version = src.passthru.source.date;
+  inherit src;
+  sha256 = builtins.readFile ./deps.hash;
+  passthru.updateScript = writeScript "update-paper-deps" ''
+    ${../../scripts/update-gradle.sh} minecraft/papermc/deps.nix minecraft/papermc/deps.hash
+  '';
+})

minecraft/papermc-from-source/source.json

@@ -0,0 +1,11 @@
+{
+  "url": "https://github.com/PaperMC/Paper",
+  "rev": "bd496d0e0ddd5b4ec7702fde28e0fe9b4b703e0f",
+  "date": "2022-09-28T04:27:26+01:00",
+  "path": "/nix/store/qh5sza3l8kbbfcplkjjx81q32rjc47il-Paper",
+  "sha256": "0w6ivh36da46lwkrf88fdbnngdac9ss41v3qvydgqsiicf150x0y",
+  "fetchLFS": false,
+  "fetchSubmodules": true,
+  "deepClone": false,
+  "leaveDotGit": true
+}

minecraft/papermc-from-source/source.nix

@@ -0,0 +1,19 @@
+{
+  applyPatches,
+  fetchgit,
+  writeScript,
+}: let
+  source = builtins.fromJSON (builtins.readFile ./source.json);
+in
+  (applyPatches {
+    patches = [./build.patch];
+    src = fetchgit {
+      inherit (source) url rev sha256 fetchLFS fetchSubmodules deepClone leaveDotGit;
+    };
+  })
+  .overrideAttrs (_: {
+    passthru.source = source;
+    passthru.updateScript = writeScript "update-paper-git" ''
+      ${../../scripts/update-git.sh} https://github.com/PaperMC/Paper minecraft/papermc/source.json "--leave-dotGit --fetch-submodules"
+    '';
+  })

minecraft/papermc/default.nix

@@ -0,0 +1,41 @@
+{
+  stdenvNoCC,
+  openjdk_headless,
+  callPackage,
+  lib,
+  writeScript,
+}: let
+  paperJar = callPackage ./jar.nix {};
+  versionInfo = builtins.fromJSON (builtins.readFile ./paper.json);
+in
+  stdenvNoCC.mkDerivation {
+    preferLocalBuild = true;
+    pname = "paper";
+    version = "${versionInfo.version}.${toString versionInfo.build}";
+    dontUnpack = true;
+    dontConfigure = true;
+
+    buildPhase = ''
+      cat > minecraft-server << EOF
+      #!/bin/sh
+      exec ${openjdk_headless}/bin/java \$@ -jar $out/share/papermc/papermc.jar nogui
+    '';
+
+    installPhase = ''
+      mkdir -p $out/share/papermc
+      ln -s ${paperJar} $out/share/papermc/papermc.jar
+      install -Dm555 -t $out/bin minecraft-server
+    '';
+
+    meta = {
+      description = "High performance minecraft server";
+      # This is a fun one because while papermc’s patches are released under the gpl, they apply patches to a proprietary binary which they then execute, so
+      license = lib.licenses.gpl3;
+      unfree = true;
+    };
+    passthru.updateScript = writeScript "update-paper" ''      #! /usr/bin/env nix-shell
+      #! nix-shell -i bash -p curl jq
+
+      curl -L https://papermc.io/api/v2/projects/paper/versions/1.19.2/builds | jq '{"version":.version, "build":.builds[-1].build, "name":.builds[-1].downloads.application.name, "sha256":.builds[-1].downloads.application.sha256}' > minecraft/papermc/paper.json
+    '';
+  }

minecraft/papermc/jar.nix

@@ -0,0 +1,7 @@
+{fetchurl}: let
+  versionInfo = builtins.fromJSON (builtins.readFile ./paper.json);
+in
+  fetchurl {
+    url = "https://papermc.io/api/v2/projects/paper/versions/${versionInfo.version}/builds/${toString versionInfo.build}/downloads/${versionInfo.name}";
+    inherit (versionInfo) sha256;
+  }

minecraft/papermc/paper.json

@@ -0,0 +1,6 @@
+{
+  "version": "1.19.2",
+  "build": 177,
+  "name": "paper-1.19.2-177.jar",
+  "sha256": "4f16eb2cb417049109be7ba679af79b26ce164b9aa8ff5686aaec432706d0a08"
+}

minecraft/update.sh

@@ -1,4 +0,0 @@
-#! /usr/bin/env nix-shell
-#! nix-shell -i bash -p curl jq
-
-curl -L https://papermc.io/api/v2/projects/paper/versions/1.19.2/builds | jq '{"version":.version, "build":.builds[-1].build, "name":.builds[-1].downloads.application.name, "sha256":.builds[-1].downloads.application.sha256}' > paper.json

scripts/update-gradle.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p nix-prefetch
+PACKAGE_PATH=$1
+WRITE_PATH=$2
+
+nix-prefetch "{ sha256 }: (callPackage (import $PACKAGE_PATH) { }).overrideAttrs (_: { outputHash = sha256; })" > $WRITE_PATH