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Trying again to do some shady reflection stuff to fix a Paper issue.

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Paper plugin should be able to register Brigadier commands that redirects to the root command node (similar to vanilla /execute run)
This commit is contained in:
Marc Baloup 2024-11-23 00:11:16 +01:00
parent 974347cbde
commit ee023b5d2c
1 changed files with 16 additions and 0 deletions
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16
pandalib-paper/src/main/java/fr/pandacube/lib/paper/commands/PaperBrigadierCommand.java
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@ -23,6 +23,8 @@ import fr.pandacube.lib.paper.reflect.wrapper.paper.commands.PluginCommandNode;
import fr.pandacube.lib.players.standalone.AbstractOffPlayer;
import fr.pandacube.lib.players.standalone.AbstractOnlinePlayer;
import fr.pandacube.lib.players.standalone.AbstractPlayerManager;
import fr.pandacube.lib.reflect.Reflect;
import fr.pandacube.lib.reflect.ReflectClass;
import fr.pandacube.lib.util.log.Log;
import io.papermc.paper.command.brigadier.CommandSourceStack;
import io.papermc.paper.plugin.lifecycle.event.types.LifecycleEvents;
@ -37,6 +39,7 @@ import org.bukkit.event.Listener;
import org.bukkit.plugin.Plugin;
import org.bukkit.util.Vector;
import java.lang.reflect.InvocationTargetException;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
@ -65,6 +68,19 @@ public abstract class PaperBrigadierCommand extends BrigadierCommand<CommandSour
private static void updateVanillaPaperDispatcher(CommandDispatcher<CommandSourceStack> newDispatcher) {
if (vanillaPaperDispatcher == null || newDispatcher != vanillaPaperDispatcher) {
vanillaPaperDispatcher = newDispatcher;
// vanillaPaperDispatcher.getRoot() is not the real root but a wrapped root. Trying to map the fake root with the real one to trick the Paper/Brigadier (un)wrapper
RootCommandNode<CommandSourceStack> wrappedRoot = vanillaPaperDispatcher.getRoot();
ReflectClass<?> apiMirrorRootNodeClass = Reflect.ofClassOfInstance(wrappedRoot);
try {
RootCommandNode<?> actualRoot = ((CommandDispatcher<?>) apiMirrorRootNodeClass.method("getDispatcher").invoke(wrappedRoot)).getRoot();
Reflect.ofClass(CommandNode.class).field("unwrappedCached").setValue(wrappedRoot, actualRoot);
Reflect.ofClass(CommandNode.class).field("wrappedCached").setValue(actualRoot, wrappedRoot);
} catch (InvocationTargetException|IllegalAccessException|NoSuchMethodException|NoSuchFieldException e) {
Log.severe("Unable to trick the Paper/Brigadier unwrapper to properly handle redirecting to root command node.", e);
}
}
}