#655: Added support for the VM tag jansi.passthrough when processing messages sent to a ColouredConsoleSender.

src/main/java/org/bukkit/craftbukkit/command/ColouredConsoleSender.java

@@ -14,10 +14,12 @@ public class ColouredConsoleSender extends CraftConsoleCommandSender {
     private final Terminal terminal;
     private final Map<ChatColor, String> replacements = new EnumMap<ChatColor, String>(ChatColor.class);
     private final ChatColor[] colors = ChatColor.values();
+    private final boolean jansiPassthrough;
 
     protected ColouredConsoleSender() {
         super();
         this.terminal = ((CraftServer) getServer()).getReader().getTerminal();
+        this.jansiPassthrough = Boolean.getBoolean("jansi.passthrough");
 
         replacements.put(ChatColor.BLACK, Ansi.ansi().a(Attribute.RESET).fg(Ansi.Color.BLACK).boldOff().toString());
         replacements.put(ChatColor.DARK_BLUE, Ansi.ansi().a(Attribute.RESET).fg(Ansi.Color.BLUE).boldOff().toString());
@@ -45,7 +47,8 @@ public class ColouredConsoleSender extends CraftConsoleCommandSender {
 
     @Override
     public void sendMessage(String message) {
-        if (terminal.isAnsiSupported()) {
+        // support jansi passthrough VM option when jansi doesn't detect an ANSI supported terminal
+        if (jansiPassthrough || terminal.isAnsiSupported()) {
             if (!conversationTracker.isConversingModaly()) {
                 String result = message;
                 for (ChatColor color : colors) {