Server administrators can now specify custom aliases in bukkit.yml which override any aliases set by plugins.

By: Dinnerbone <dinnerbone@dinnerbone.com>

paper-api/src/main/java/org/bukkit/Server.java

@@ -6,6 +6,7 @@ import org.bukkit.entity.Player;
 import org.bukkit.inventory.Recipe;
 
 import java.util.List;
+import java.util.Map;
 import java.util.logging.Logger;
 import org.bukkit.command.PluginCommand;
 
@@ -263,4 +264,11 @@ public interface Server {
      * @return True to indicate that the recipe was added.
      */
     public boolean addRecipe(Recipe recipe);
+
+    /**
+     * Gets a list of command aliases defined in the server properties.
+     *
+     * @return Map of aliases to command names
+     */
+    public Map<String, String> getCommandAliases();
 }

paper-api/src/main/java/org/bukkit/command/SimpleCommandMap.java

@@ -150,6 +150,22 @@ public final class SimpleCommandMap implements CommandMap {
         return knownCommands.get(name.toLowerCase());
     }
 
+    public void registerServerAliases() {
+        Map<String, String> values = server.getCommandAliases();
+        
+        for (String alias : values.keySet()) {
+            String target = values.get(alias);
+            Command command = getCommand(target);
+
+            if (command != null) {
+                // We register these as commands so they have absolute priority.
+                knownCommands.put(alias.toLowerCase(), command);
+            } else {
+                server.getLogger().warning("Could not register custom alias '" + alias + "' to command '" + target + "' because the command does not exist.");
+            }
+        }
+    }
+
     private static class VersionCommand extends Command {
         private final Server server;
 

paper-api/src/main/java/org/bukkit/util/config/ConfigurationNode.java

@@ -220,6 +220,15 @@ public class ConfigurationNode {
         }
     }
 
+    /**
+     * Returns a list of all keys at the root path
+     *
+     * @return List of keys
+     */
+    public List<String> getKeys() {
+        return new ArrayList<String>(root.keySet());
+    }
+
     /**
      * Gets a list of objects at a location. If the list is not defined,
      * null will be returned. The node must be an actual list.