Sponge support

bukkit/src/main/java/me/lucko/luckperms/BukkitCommand.java

@@ -0,0 +1,49 @@
+package me.lucko.luckperms;
+
+import me.lucko.luckperms.commands.CommandManager;
+import me.lucko.luckperms.commands.Sender;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.TabExecutor;
+
+import java.lang.ref.WeakReference;
+import java.util.Arrays;
+import java.util.List;
+
+class BukkitCommand extends CommandManager implements CommandExecutor, TabExecutor {
+    BukkitCommand(LuckPermsPlugin plugin) {
+        super(plugin);
+    }
+
+    @Override
+    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+        return onCommand(makeSender(sender), label, Arrays.asList(args));
+    }
+
+
+    @Override
+    public List<String> onTabComplete(CommandSender sender, Command command, String label, String[] args) {
+        return onTabComplete(makeSender(sender), Arrays.asList(args));
+    }
+
+    private static Sender makeSender(CommandSender sender) {
+        return new Sender() {
+            final WeakReference<CommandSender> cs = new WeakReference<>(sender);
+
+            @Override
+            public void sendMessage(String s) {
+                final CommandSender c = cs.get();
+                if (c != null) {
+                    c.sendMessage(s);
+                }
+            }
+
+            @Override
+            public boolean hasPermission(String node) {
+                final CommandSender c = cs.get();
+                return c != null && c.hasPermission(node);
+            }
+        };
+    }
+}