From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Owen1212055 <23108066+Owen1212055@users.noreply.github.com>
Date: Wed, 29 Mar 2023 16:50:14 -0400
Subject: [PATCH] Require plugins to be explicitly marked as Folia supported


diff --git a/src/main/java/io/papermc/paper/plugin/provider/configuration/PaperPluginMeta.java b/src/main/java/io/papermc/paper/plugin/provider/configuration/PaperPluginMeta.java
index d3b3a8baca013909fa9c6204d964d7d7efeb2719..fb7c6621e2805f4339c255f6c2e02c55ff4c502e 100644
--- a/src/main/java/io/papermc/paper/plugin/provider/configuration/PaperPluginMeta.java
+++ b/src/main/java/io/papermc/paper/plugin/provider/configuration/PaperPluginMeta.java
@@ -64,6 +64,7 @@ public class PaperPluginMeta implements PluginMeta {
     private PermissionConfiguration permissionConfiguration = new PermissionConfiguration(PermissionDefault.OP, List.of());
     @Required
     private ApiVersion apiVersion;
+    private boolean foliaSupported = false; // Folia
 
     private Map<PluginDependencyLifeCycle, Map<String, DependencyConfiguration>> dependencies = new EnumMap<>(PluginDependencyLifeCycle.class);
 
@@ -251,6 +252,13 @@ public class PaperPluginMeta implements PluginMeta {
         return this.apiVersion.getVersionString();
     }
 
+    // Folia start
+    @Override
+    public boolean isFoliaSupported() {
+        return this.foliaSupported;
+    }
+    // Folia end
+
     @Override
     public @NotNull List<String> getProvidedPlugins() {
         return this.provides;
diff --git a/src/main/java/io/papermc/paper/plugin/provider/type/paper/PaperPluginProviderFactory.java b/src/main/java/io/papermc/paper/plugin/provider/type/paper/PaperPluginProviderFactory.java
index 0a27b468560ccf4b9588cd12d50c02e442f3024f..6369b13e1fcdbdb25dd9d6e4d3bffdedbee4f739 100644
--- a/src/main/java/io/papermc/paper/plugin/provider/type/paper/PaperPluginProviderFactory.java
+++ b/src/main/java/io/papermc/paper/plugin/provider/type/paper/PaperPluginProviderFactory.java
@@ -24,6 +24,11 @@ class PaperPluginProviderFactory implements PluginTypeFactory<PaperPluginParent,
 
     @Override
     public PaperPluginParent build(JarFile file, PaperPluginMeta configuration, Path source) {
+        // Folia start - block plugins not marked as supported
+        if (!configuration.isFoliaSupported()) {
+            throw new RuntimeException("Could not load plugin '" + configuration.getDisplayName() + "' as it is not marked as supporting Folia!");
+        }
+        // Folia end - block plugins not marked as supported
         Logger jul = PaperPluginLogger.getLogger(configuration);
         ComponentLogger logger = ComponentLogger.logger(jul.getName());
         PluginProviderContext context = PluginProviderContextImpl.create(configuration, logger, source);
diff --git a/src/main/java/io/papermc/paper/plugin/provider/type/spigot/SpigotPluginProviderFactory.java b/src/main/java/io/papermc/paper/plugin/provider/type/spigot/SpigotPluginProviderFactory.java
index 9edf79dffd2836b40d41da4437c18d6145853f89..276461c70d383709d5420f050e5d409dda3dfd6e 100644
--- a/src/main/java/io/papermc/paper/plugin/provider/type/spigot/SpigotPluginProviderFactory.java
+++ b/src/main/java/io/papermc/paper/plugin/provider/type/spigot/SpigotPluginProviderFactory.java
@@ -35,6 +35,11 @@ class SpigotPluginProviderFactory implements PluginTypeFactory<SpigotPluginProvi
 
     @Override
     public SpigotPluginProvider build(JarFile file, PluginDescriptionFile configuration, Path source) throws InvalidDescriptionException {
+        // Folia start - block plugins not marked as supported
+        if (!configuration.isFoliaSupported()) {
+            throw new RuntimeException("Could not load plugin '" + configuration.getDisplayName() + "' as it is not marked as supporting Folia!");
+        }
+        // Folia end - block plugins not marked as supported
         // Copied from SimplePluginManager#loadPlugins
         // Spigot doesn't validate the name when the config is created, and instead when the plugin is loaded.
         // Paper plugin configuration will do these checks in config serializer instead of when this is created.
diff --git a/src/test/java/io/papermc/paper/plugin/TestPluginMeta.java b/src/test/java/io/papermc/paper/plugin/TestPluginMeta.java
index ba271c35eb2804f94cfc893bf94affb9ae13d3ba..db9285c2ff0c805f5d9564b6e8520c33ea5bb65a 100644
--- a/src/test/java/io/papermc/paper/plugin/TestPluginMeta.java
+++ b/src/test/java/io/papermc/paper/plugin/TestPluginMeta.java
@@ -20,6 +20,13 @@ public class TestPluginMeta implements PluginMeta {
         this.identifier = identifier;
     }
 
+    // Folia start - region threading
+    @Override
+    public boolean isFoliaSupported() {
+        return true;
+    }
+    // Folia end - region threading
+
     @Override
     public @NotNull String getName() {
         return this.identifier;