[vscode-js-debug] Read host name from output

The host name to use may depend on network settings (eg IPv4 vs IPv6),
so instead of hardcoding it, we read it from the debug adapter output.

org.eclipse.wildwebdeveloper/src/org/eclipse/wildwebdeveloper/debug/node/VSCodeJSDebugDelegate.java

@@ -30,7 +30,7 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
-import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicReference;
 import java.util.function.Predicate;
 import java.util.regex.Pattern;
 
@@ -179,14 +179,21 @@ public void launch(ILaunchConfiguration configuration, String mode, ILaunch laun
 			processEnv.put("DA_TEST_DISABLE_TELEMETRY", Boolean.TRUE.toString());
 			Process vscodeJsDebugExec = DebugPlugin.exec(new String[] { NodeJSManager.getNodeJsLocation().getAbsolutePath(), file.getAbsolutePath(), Integer.toString(port) }, cwdFile, processEnv.entrySet().stream().map(entry -> entry.getKey() + '=' + entry.getValue()).toArray(String[]::new), false);
 			IProcess vscodeJsDebugIProcess = DebugPlugin.newProcess(launch, vscodeJsDebugExec, "debug adapter");
-			AtomicBoolean started = new AtomicBoolean();
+			AtomicReference<String> host = new AtomicReference<>(); // sometimes ::1, sometimes 127.0.0.1...
+			String portSuffix = ":" + port;
 			vscodeJsDebugIProcess.getStreamsProxy().getOutputStreamMonitor().addListener((text, mon) -> {
 				if (text.toLowerCase().contains("listening")) {
-					started.set(true);
+					for (String word : text.split(" ")) {
+						word = word.trim();
+						if (word.endsWith(portSuffix)) {
+							host.set(word.substring(0, word.length() - portSuffix.length()));
+							return;
+						}
+					}
 				}
 			});
 			Instant request = Instant.now();
-			while (!started.get() && Duration.between(request, Instant.now()).compareTo(Duration.ofSeconds(3)) < 3) {
+			while (host.get() == null && Duration.between(request, Instant.now()).compareTo(Duration.ofSeconds(3)) < 3) {
 				try {
 					Thread.sleep(100);
 				} catch (InterruptedException e) {
@@ -195,7 +202,7 @@ public void launch(ILaunchConfiguration configuration, String mode, ILaunch laun
 
 			DSPLaunchDelegateLaunchBuilder builder = new DSPLaunchDelegateLaunchBuilder(configuration, mode, launch,
 					monitor);
-			builder.setAttachDebugAdapter("::1", port);
+			builder.setAttachDebugAdapter(host.get(), port);
 			builder.setMonitorDebugAdapter(configuration.getAttribute(DSPPlugin.ATTR_DSP_MONITOR_DEBUG_ADAPTER, false));
 			builder.setDspParameters(param);
 			super.launch(builder);