Сделал табуляцию по командам

src/main/java/ua/lokha/spigotloggerforbungee/CommandCompleter.java

@@ -0,0 +1,59 @@
+package ua.lokha.spigotloggerforbungee;
+
+import net.md_5.bungee.BungeeCord;
+import net.md_5.bungee.api.plugin.Command;
+import org.apache.commons.lang3.StringUtils;
+import org.jline.reader.Candidate;
+import org.jline.reader.Completer;
+import org.jline.reader.LineReader;
+import org.jline.reader.ParsedLine;
+import ua.lokha.spigotloggerforbungee.utils.MyObject;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.regex.Pattern;
+
+/**
+ * Completer command
+ */
+public class CommandCompleter implements Completer {
+    private final Pattern argsSplit = Pattern.compile(" ");
+    private final Map<String, Command> commandMap;
+    private BungeeCord bungeeCord;
+
+    public CommandCompleter(BungeeCord bungeeCord) {
+        this.bungeeCord = bungeeCord;
+        this.commandMap = MyObject.wrap(bungeeCord.getPluginManager()).getField("commandMap").getObject();
+    }
+
+    @Override
+    public void complete(LineReader reader1, ParsedLine line, List<Candidate> candidates) {
+        final String buffer = line.line();
+        List<String> suggestions = new ArrayList<>();
+        if (!this.suggestCommands(line, candidates)) {
+            bungeeCord.getPluginManager().dispatchCommand(bungeeCord.getConsole(), buffer, suggestions);
+            for (String suggestion : suggestions) {
+                candidates.add(new Candidate(suggestion));
+            }
+        }
+//                            int lastSpace = buffer.lastIndexOf(32);
+//                            return lastSpace == -1 ? cursor - buffer.length() : cursor - (buffer.length() - lastSpace - 1);
+    }
+
+    private boolean suggestCommands(ParsedLine line, List<Candidate> candidates) {
+        final String buffer = line.line();
+        String[] split = argsSplit.split(buffer, -1);
+        if (split.length == 1) {
+            final Command command = commandMap.get(split[0]);
+            if (command == null) {
+                commandMap.keySet().stream()
+                        .filter(s -> StringUtils.startsWithIgnoreCase(s, buffer))
+                        .forEach(s->candidates.add(new Candidate(s)));
+                return true;
+            }
+        }
+        return false;
+    }
+}

src/main/java/ua/lokha/spigotloggerforbungee/paperspigotclasses/TerminalHandler.java

@@ -9,6 +9,7 @@
 import org.jline.reader.*;
 import org.jline.reader.LineReader.Option;
 import org.jline.terminal.Terminal;
+import ua.lokha.spigotloggerforbungee.CommandCompleter;
 import ua.lokha.spigotloggerforbungee.SpigotLoggerForBungeePlugin;
 
 import java.util.ArrayList;
@@ -23,22 +24,11 @@ private TerminalHandler() {
 
     public static boolean handleCommands(BungeeCord bungeeCord, SpigotLoggerForBungeePlugin plugin) {
         Terminal terminal = TerminalConsoleAppender.getTerminal();
-        System.out.println("TERTIMAL: " + terminal);
         if (terminal == null) {
             return false;
         } else {
             LineReader reader = LineReaderBuilder.builder().appName("BungeeCord").terminal(terminal)
-                    .completer((reader1, line, candidates) -> {
-                        final String buffer = line.line();
-                        List<String> suggestions = new ArrayList<>();
-                        bungeeCord.getPluginManager().dispatchCommand(bungeeCord.getConsole(), buffer, suggestions);
-                        System.out.println("COMPLETE " + suggestions);
-                        for (String suggestion : suggestions) {
-                            candidates.add(new Candidate(suggestion));
-                        }
-//                            int lastSpace = buffer.lastIndexOf(32);
-//                            return lastSpace == -1 ? cursor - buffer.length() : cursor - (buffer.length() - lastSpace - 1);
-                    })
+                    .completer(new CommandCompleter(bungeeCord))
                     .build();
             reader.unsetOpt(Option.INSERT_TAB);
             TerminalConsoleAppender.setReader(reader);