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Enable Multi-Release plugin jar support

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Fixes #4841
This commit is contained in:
Kyle Wood 2020-12-04 15:57:46 -08:00
parent 256a700c8d
commit 08835cda45
2 changed files with 59 additions and 36 deletions
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30
Spigot-API-Patches/Enable-multi-release-plugin-jars.patch Normal file
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@ -0,0 +1,30 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Kyle Wood <kyle@denwav.dev>
Date: Fri, 4 Dec 2020 15:53:19 -0800
Subject: [PATCH] Enable multi-release plugin jars
diff --git a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
+++ b/src/main/java/org/bukkit/plugin/java/PluginClassLoader.java
@@ -0,0 +0,0 @@ public final class PluginClassLoader extends URLClassLoader { // Spigot
this.description = description;
this.dataFolder = dataFolder;
this.file = file;
- this.jar = new JarFile(file);
+ // Paper - enable multi-release jars for Java 9+
+ JarFile jarFile;
+ try {
+ final java.lang.reflect.Method runtimeVersionMethod = JarFile.class.getMethod("runtimeVersion");
+ final Object runtimeVersion = runtimeVersionMethod.invoke(null);
+ @SuppressWarnings("JavaReflectionMemberAccess") final java.lang.reflect.Constructor<JarFile> constructor = JarFile.class.getConstructor(File.class, boolean.class, int.class, runtimeVersion.getClass());
+ jarFile = constructor.newInstance(file, true, java.util.zip.ZipFile.OPEN_READ, runtimeVersion);
+ } catch (Exception ignored) {
+ jarFile = new JarFile(file);
+ }
+ this.jar = jarFile;
+ // Paper end
this.manifest = jar.getManifest();
this.url = file.toURI().toURL();

65
Spigot-Server-Patches/Add-warning-for-servers-not-running-on-Java-11.patch
View file

@ -15,55 +15,48 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+public final class PaperJvmChecker {
+public class PaperJvmChecker {
+
+ private PaperJvmChecker() {}
+
+ public static void checkJvm() {
+ final Logger logger = LogManager.getLogger();
+
+ final String javaVersion = System.getProperty("java.version");
+ final int dotIndex = javaVersion.indexOf('.');
+ private static int getJvmVersion() {
+ String javaVersion = System.getProperty("java.version");
+ int dotIndex = javaVersion.indexOf('.');
+
+ if (javaVersion.startsWith("1.")) {
+ // definitely old
+ PaperJvmChecker.printWarning(javaVersion, logger);
+ return;
+ // For Java 8 and below, trim off the 1. prefix
+ javaVersion = javaVersion.substring(2);
+ dotIndex = javaVersion.indexOf('.');
+ }
+
+ final int endIndex = dotIndex == -1 ? javaVersion.length() : dotIndex;
+ final String version = javaVersion.substring(0, endIndex);
+
+ final int javaVersionNum;
+ try {
+ javaVersionNum = Integer.parseInt(version);
+ return Integer.parseInt(version);
+ } catch (final NumberFormatException e) {
+ logger.warn("Failed to determine Java version; Could not parse {}", version, e);
+ PaperJvmChecker.printWarning(javaVersion, logger);
+ return;
+ }
+
+ if (javaVersionNum < 11) {
+ PaperJvmChecker.printWarning(javaVersion, logger);
+ LogManager.getLogger().warn("Failed to determine Java version; Could not parse {}", version, e);
+ return -1;
+ }
+ }
+
+ private static void printWarning(final String version, final Logger logger) {
+ logger.warn("************************************************************");
+ logger.warn("* WARNING - YOU ARE RUNNING AN OUTDATED VERSION OF JAVA.");
+ logger.warn("* PAPER WILL STOP BEING COMPATIBLE WITH THIS VERSION OF");
+ logger.warn("* JAVA WHEN MINECRAFT 1.17 IS RELEASED.");
+ logger.warn("*");
+ logger.warn("* Please update the version of Java you use to run Paper");
+ logger.warn("* to at least Java 11. When Paper for Minecraft 1.17 is");
+ logger.warn("* released support for versions of Java before 11 will");
+ logger.warn("* be dropped.");
+ logger.warn("*");
+ logger.warn("* Current Java version: " + version);
+ logger.warn("*");
+ logger.warn("* Check this forum post for more information: ");
+ logger.warn("* https://papermc.io/java11");
+ logger.warn("************************************************************");
+ public static void checkJvm() {
+ if (getJvmVersion() < 11) {
+ final Logger logger = LogManager.getLogger();
+ logger.warn("************************************************************");
+ logger.warn("* WARNING - YOU ARE RUNNING AN OUTDATED VERSION OF JAVA.");
+ logger.warn("* PAPER WILL STOP BEING COMPATIBLE WITH THIS VERSION OF");
+ logger.warn("* JAVA WHEN MINECRAFT 1.17 IS RELEASED.");
+ logger.warn("*");
+ logger.warn("* Please update the version of Java you use to run Paper");
+ logger.warn("* to at least Java 11. When Paper for Minecraft 1.17 is");
+ logger.warn("* released support for versions of Java before 11 will");
+ logger.warn("* be dropped.");
+ logger.warn("*");
+ logger.warn("* Current Java version: {}", System.getProperty("java.version"));
+ logger.warn("*");
+ logger.warn("* Check this forum post for more information: ");
+ logger.warn("* https://papermc.io/java11");
+ logger.warn("************************************************************");
+ }
+ }
+}
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java