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PaperMC/patches/server/0298-Implement-Brigadier-Mojang-API.patch
Spottedleaf 01a13871de
Rewrite chunk system (#8177) 
Patch documentation to come

Issues with the old system that are fixed now:
- World generation does not scale with cpu cores effectively.
- Relies on the main thread for scheduling and maintaining chunk state, dropping chunk load/generate rates at lower tps.
- Unreliable prioritisation of chunk gen/load calls that block the main thread.
- Shutdown logic is utterly unreliable, as it has to wait for all chunks to unload - is it guaranteed that the chunk system is in a state on shutdown that it can reliably do this? Watchdog shutdown also typically failed due to thread checks, which is now resolved.
- Saving of data is not unified (i.e can save chunk data without saving entity data, poses problems for desync if shutdown is really abnormal.
- Entities are not loaded with chunks. This caused quite a bit of headache for Chunk#getEntities API, but now the new chunk system loads entities with chunks so that they are ready whenever the chunk loads in. Effectively brings the behavior back to 1.16 era, but still storing entities in their own separate regionfiles.

The above list is not complete. The patch documentation will complete it.

New chunk system hard relies on starlight and dataconverter, and most importantly the new concurrent utilities in ConcurrentUtil.

Some of the old async chunk i/o interface (i.e the old file io thread reroutes _some_ calls to the new file io thread) is kept for plugin compat reasons. It will be removed in the next major version of minecraft.

The old legacy chunk system patches have been moved to the removed folder in case we need them again.
2022-09-26 01:02:51 -07:00

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 19 Apr 2020 18:15:29 -0400
Subject: [PATCH] Implement Brigadier Mojang API
Adds AsyncPlayerSendCommandsEvent
- Allows modifying on a per command basis what command data they see.
Adds CommandRegisteredEvent
- Allows manipulating the CommandNode to add more children/metadata for the client
diff --git a/build.gradle.kts b/build.gradle.kts
index 6dbac0f93481256dd57e76630ae9eea9d5c56849..e260462933a9f7065b2360e6bf9e4ee56069a705 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -8,6 +8,7 @@ plugins {
dependencies {
implementation(project(":paper-api"))
+ implementation(project(":paper-mojangapi"))
// Paper start
implementation("org.jline:jline-terminal-jansi:3.21.0")
implementation("net.minecrell:terminalconsoleappender:1.3.0")
diff --git a/src/main/java/com/mojang/brigadier/tree/CommandNode.java b/src/main/java/com/mojang/brigadier/tree/CommandNode.java
index da6250df1c5f3385b683cffde47754bca4606f5e..3384501f83d445f45aa8233e98c7597daa67b8ef 100644
--- a/src/main/java/com/mojang/brigadier/tree/CommandNode.java
+++ b/src/main/java/com/mojang/brigadier/tree/CommandNode.java
@@ -34,6 +34,7 @@ public abstract class CommandNode<S> implements Comparable<CommandNode<S>> {
private final RedirectModifier<S> modifier;
private final boolean forks;
private Command<S> command;
+ public LiteralCommandNode<CommandSourceStack> clientNode = null; // Paper
// CraftBukkit start
public void removeCommand(String name) {
this.children.remove(name);
diff --git a/src/main/java/net/minecraft/commands/CommandSourceStack.java b/src/main/java/net/minecraft/commands/CommandSourceStack.java
index 3308d684fc6cd0a83e190a52693b29d30e0087cb..aadddbc16aa719677c3b6fc4969b6145b9b9ee0b 100644
--- a/src/main/java/net/minecraft/commands/CommandSourceStack.java
+++ b/src/main/java/net/minecraft/commands/CommandSourceStack.java
@@ -39,7 +39,7 @@ import net.minecraft.world.phys.Vec2;
import net.minecraft.world.phys.Vec3;
import com.mojang.brigadier.tree.CommandNode; // CraftBukkit
-public class CommandSourceStack implements SharedSuggestionProvider {
+public class CommandSourceStack implements SharedSuggestionProvider, com.destroystokyo.paper.brigadier.BukkitBrigadierCommandSource { // Paper
public static final SimpleCommandExceptionType ERROR_NOT_PLAYER = new SimpleCommandExceptionType(Component.translatable("permissions.requires.player"));
public static final SimpleCommandExceptionType ERROR_NOT_ENTITY = new SimpleCommandExceptionType(Component.translatable("permissions.requires.entity"));
@@ -172,6 +172,26 @@ public class CommandSourceStack implements SharedSuggestionProvider {
return this.entity != null ? this.entity.asChatSender() : ChatSender.SYSTEM;
}
+ // Paper start
+ @Override
+ public org.bukkit.entity.Entity getBukkitEntity() {
+ return getEntity() != null ? getEntity().getBukkitEntity() : null;
+ }
+
+ @Override
+ public org.bukkit.World getBukkitWorld() {
+ return getLevel() != null ? getLevel().getWorld() : null;
+ }
+
+ @Override
+ public org.bukkit.Location getBukkitLocation() {
+ Vec3 pos = getPosition();
+ org.bukkit.World world = getBukkitWorld();
+ Vec2 rot = getRotation();
+ return world != null && pos != null ? new org.bukkit.Location(world, pos.x, pos.y, pos.z, rot != null ? rot.x : 0, rot != null ? rot.y : 0) : null;
+ }
+ // Paper end
+
@Override
public boolean hasPermission(int level) {
// CraftBukkit start
diff --git a/src/main/java/net/minecraft/commands/Commands.java b/src/main/java/net/minecraft/commands/Commands.java
index c4315531f93f4ed68b4621157b02572886e1ed30..b141d251eedd31bd115342b878afd68dc51a8518 100644
--- a/src/main/java/net/minecraft/commands/Commands.java
+++ b/src/main/java/net/minecraft/commands/Commands.java
@@ -396,6 +396,7 @@ public class Commands {
bukkit.add(node.getName());
}
// Paper start - Async command map building
+ new com.destroystokyo.paper.event.brigadier.AsyncPlayerSendCommandsEvent<CommandSourceStack>(player.getBukkitEntity(), (RootCommandNode) rootcommandnode, false).callEvent(); // Paper
net.minecraft.server.MinecraftServer.getServer().execute(() -> {
runSync(player, bukkit, rootcommandnode);
});
@@ -403,6 +404,7 @@ public class Commands {
private void runSync(ServerPlayer player, Collection<String> bukkit, RootCommandNode<SharedSuggestionProvider> rootcommandnode) {
// Paper end - Async command map building
+ new com.destroystokyo.paper.event.brigadier.AsyncPlayerSendCommandsEvent<CommandSourceStack>(player.getBukkitEntity(), (RootCommandNode) rootcommandnode, false).callEvent(); // Paper
PlayerCommandSendEvent event = new PlayerCommandSendEvent(player.getBukkitEntity(), new LinkedHashSet<>(bukkit));
event.getPlayer().getServer().getPluginManager().callEvent(event);
@@ -421,6 +423,11 @@ public class Commands {
while (iterator.hasNext()) {
CommandNode<CommandSourceStack> commandnode2 = (CommandNode) iterator.next();
+ // Paper start
+ if (commandnode2.clientNode != null) {
+ commandnode2 = commandnode2.clientNode;
+ }
+ // Paper end
if ( !org.spigotmc.SpigotConfig.sendNamespaced && commandnode2.getName().contains( ":" ) ) continue; // Spigot
if (commandnode2.canUse(source)) {
diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index 61a0cee760d058e382c2756096a5acce050d9f9d..ac5f70ee86cc5a01b046e8e610434742448e3919 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -836,8 +836,12 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
ParseResults<CommandSourceStack> parseresults = this.server.getCommands().getDispatcher().parse(stringreader, this.player.createCommandSourceStack());
this.server.getCommands().getDispatcher().getCompletionSuggestions(parseresults).thenAccept((suggestions) -> {
- if (suggestions.isEmpty()) return; // CraftBukkit - don't send through empty suggestions - prevents [<args>] from showing for plugins with nothing more to offer
- this.connection.send(new ClientboundCommandSuggestionsPacket(packet.getId(), suggestions));
+ // Paper start - Brigadier API
+ com.destroystokyo.paper.event.brigadier.AsyncPlayerSendSuggestionsEvent suggestEvent = new com.destroystokyo.paper.event.brigadier.AsyncPlayerSendSuggestionsEvent(this.getCraftPlayer(), suggestions, command);
+ suggestEvent.setCancelled(suggestions.isEmpty());
+ if (!suggestEvent.callEvent()) return;
+ this.connection.send(new ClientboundCommandSuggestionsPacket(packet.getId(), suggestEvent.getSuggestions()));
+ // Paper end - Brigadier API
});
});
}
@@ -852,7 +856,13 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
builder.suggest(completion.suggestion(), PaperAdventure.asVanilla(completion.tooltip()));
}
});
- player.connection.send(new ClientboundCommandSuggestionsPacket(packet.getId(), builder.buildFuture().join()));
+ // Paper start - Brigadier API
+ com.mojang.brigadier.suggestion.Suggestions suggestions = builder.buildFuture().join();
+ com.destroystokyo.paper.event.brigadier.AsyncPlayerSendSuggestionsEvent suggestEvent = new com.destroystokyo.paper.event.brigadier.AsyncPlayerSendSuggestionsEvent(this.getCraftPlayer(), suggestions, command);
+ suggestEvent.setCancelled(suggestions.isEmpty());
+ if (!suggestEvent.callEvent()) return;
+ this.connection.send(new ClientboundCommandSuggestionsPacket(packet.getId(), suggestEvent.getSuggestions()));
+ // Paper end - Brigadier API
}
});
// Paper end - async tab completion
diff --git a/src/main/java/org/bukkit/craftbukkit/command/BukkitCommandWrapper.java b/src/main/java/org/bukkit/craftbukkit/command/BukkitCommandWrapper.java
index 83d81b9371902b0302d13e53b31c15fac4e67966..d113e54a30db16e2ad955170df6030d15de530d6 100644
--- a/src/main/java/org/bukkit/craftbukkit/command/BukkitCommandWrapper.java
+++ b/src/main/java/org/bukkit/craftbukkit/command/BukkitCommandWrapper.java
@@ -20,7 +20,7 @@ import org.bukkit.command.CommandException;
import org.bukkit.command.CommandSender;
import org.bukkit.craftbukkit.CraftServer;
-public class BukkitCommandWrapper implements com.mojang.brigadier.Command<CommandSourceStack>, Predicate<CommandSourceStack>, SuggestionProvider<CommandSourceStack> {
+public class BukkitCommandWrapper implements com.mojang.brigadier.Command<CommandSourceStack>, Predicate<CommandSourceStack>, SuggestionProvider<CommandSourceStack>, com.destroystokyo.paper.brigadier.BukkitBrigadierCommand<CommandSourceStack> { // Paper
private final CraftServer server;
private final Command command;
@@ -31,10 +31,24 @@ public class BukkitCommandWrapper implements com.mojang.brigadier.Command<Comman
}
public LiteralCommandNode<CommandSourceStack> register(CommandDispatcher<CommandSourceStack> dispatcher, String label) {
- return dispatcher.register(
- LiteralArgumentBuilder.<CommandSourceStack>literal(label).requires(this).executes(this)
- .then(RequiredArgumentBuilder.<CommandSourceStack, String>argument("args", StringArgumentType.greedyString()).suggests(this).executes(this))
- );
+ // Paper start - Expose Brigadier to Paper-MojangAPI
+ com.mojang.brigadier.tree.RootCommandNode<CommandSourceStack> root = dispatcher.getRoot();
+ LiteralCommandNode<CommandSourceStack> literal = LiteralArgumentBuilder.<CommandSourceStack>literal(label).requires(this).executes(this).build();
+ LiteralCommandNode<CommandSourceStack> defaultNode = literal;
+ com.mojang.brigadier.tree.ArgumentCommandNode<CommandSourceStack, String> defaultArgs = RequiredArgumentBuilder.<CommandSourceStack, String>argument("args", StringArgumentType.greedyString()).suggests(this).executes(this).build();
+ literal.addChild(defaultArgs);
+ com.destroystokyo.paper.event.brigadier.CommandRegisteredEvent<CommandSourceStack> event = new com.destroystokyo.paper.event.brigadier.CommandRegisteredEvent<>(label, this, this.command, root, literal, defaultArgs);
+ if (!event.callEvent()) {
+ return null;
+ }
+ literal = event.getLiteral();
+ if (event.isRawCommand()) {
+ defaultNode.clientNode = literal;
+ literal = defaultNode;
+ }
+ root.addChild(literal);
+ return literal;
+ // Paper end
}
@Override
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