Add Diag with more info for exceptions

client/src/main/java-mvnd/org/mvndaemon/mvnd/client/DefaultClient.java

@@ -87,7 +87,7 @@ public static void main(String[] argv) throws Exception {
 
         // Diag
         if (Environment.DIAG.removeCommandLineOption(args) != null) {
-            org.jline.terminal.impl.Diag.diag(System.out);
+            Diag.diag(System.out);
             return;
         }
 

client/src/main/java/org/mvndaemon/mvnd/client/Diag.java

@@ -0,0 +1,186 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.mvndaemon.mvnd.client;
+
+import java.io.PrintStream;
+import java.nio.charset.StandardCharsets;
+import java.util.ServiceLoader;
+import java.util.concurrent.ForkJoinPool;
+import java.util.concurrent.ForkJoinTask;
+import java.util.concurrent.TimeUnit;
+
+import org.jline.terminal.Attributes;
+import org.jline.terminal.Terminal;
+import org.jline.terminal.impl.AbstractPosixTerminal;
+import org.jline.terminal.spi.SystemStream;
+import org.jline.terminal.spi.TerminalProvider;
+import org.jline.utils.OSUtils;
+
+public class Diag {
+
+    public static void main(String[] args) {
+        diag(System.out);
+    }
+
+    public static void diag(PrintStream out) {
+        out.println("System properties");
+        out.println("=================");
+        out.println("os.name =         " + System.getProperty("os.name"));
+        out.println("OSTYPE =          " + System.getenv("OSTYPE"));
+        out.println("MSYSTEM =         " + System.getenv("MSYSTEM"));
+        out.println("PWD =             " + System.getenv("PWD"));
+        out.println("ConEmuPID =       " + System.getenv("ConEmuPID"));
+        out.println("WSL_DISTRO_NAME = " + System.getenv("WSL_DISTRO_NAME"));
+        out.println("WSL_INTEROP =     " + System.getenv("WSL_INTEROP"));
+        out.println();
+
+        out.println("OSUtils");
+        out.println("=================");
+        out.println("IS_WINDOWS = " + OSUtils.IS_WINDOWS);
+        out.println("IS_CYGWIN =  " + OSUtils.IS_CYGWIN);
+        out.println("IS_MSYSTEM = " + OSUtils.IS_MSYSTEM);
+        out.println("IS_WSL =     " + OSUtils.IS_WSL);
+        out.println("IS_WSL1 =    " + OSUtils.IS_WSL1);
+        out.println("IS_WSL2 =    " + OSUtils.IS_WSL2);
+        out.println("IS_CONEMU =  " + OSUtils.IS_CONEMU);
+        out.println("IS_OSX =     " + OSUtils.IS_OSX);
+        out.println();
+
+        // FFM
+        out.println("FFM Support");
+        out.println("=================");
+        try {
+            TerminalProvider provider = TerminalProvider.load("ffm");
+            testProvider(out, provider);
+        } catch (Throwable t) {
+            out.println("FFM support not available: " + t);
+        }
+        out.println();
+
+        out.println("JnaSupport");
+        out.println("=================");
+        try {
+            TerminalProvider provider = TerminalProvider.load("jna");
+            testProvider(out, provider);
+        } catch (Throwable t) {
+            out.println("JNA support not available: " + t);
+        }
+        out.println();
+
+        out.println("Jansi2Support");
+        out.println("=================");
+        try {
+            TerminalProvider provider = TerminalProvider.load("jansi");
+            testProvider(out, provider);
+        } catch (Throwable t) {
+            out.println("Jansi 2 support not available: " + t);
+        }
+        out.println();
+
+        out.println("JniSupport");
+        out.println("=================");
+        try {
+            TerminalProvider provider = TerminalProvider.load("jni");
+            testProvider(out, provider);
+        } catch (Throwable t) {
+            out.println("JNI support not available: " + t);
+        }
+        out.println();
+
+        // Exec
+        out.println("Exec Support");
+        out.println("=================");
+        try {
+            TerminalProvider provider = TerminalProvider.load("exec");
+            testProvider(out, provider);
+        } catch (Throwable t) {
+            out.println("Exec support not available: " + t);
+        }
+    }
+
+    private static void testProvider(PrintStream out, TerminalProvider provider) {
+        try {
+            out.println("StdIn stream =    " + provider.isSystemStream(SystemStream.Input));
+            out.println("StdOut stream =   " + provider.isSystemStream(SystemStream.Output));
+            out.println("StdErr stream =   " + provider.isSystemStream(SystemStream.Error));
+        } catch (Throwable t2) {
+            out.println("Unable to check stream: " + t2);
+        }
+        try {
+            out.println("StdIn stream name =     " + provider.systemStreamName(SystemStream.Input));
+            out.println("StdOut stream name =    " + provider.systemStreamName(SystemStream.Output));
+            out.println("StdErr stream name =    " + provider.systemStreamName(SystemStream.Error));
+        } catch (Throwable t2) {
+            out.println("Unable to check stream names: " + t2);
+        }
+        try (Terminal terminal = provider.sysTerminal(
+                "diag",
+                "xterm",
+                false,
+                StandardCharsets.UTF_8,
+                false,
+                Terminal.SignalHandler.SIG_DFL,
+                false,
+                SystemStream.Output)) {
+            if (terminal != null) {
+                Attributes attr = terminal.enterRawMode();
+                try {
+                    out.println("Terminal size: " + terminal.getSize());
+                    ForkJoinTask<Integer> t =
+                            new ForkJoinPool(1).submit(() -> terminal.reader().read(1));
+                    int r = t.get(1000, TimeUnit.MILLISECONDS);
+                    StringBuilder sb = new StringBuilder();
+                    sb.append("The terminal seems to work: ");
+                    sb.append("terminal ").append(terminal.getClass().getName());
+                    if (terminal instanceof AbstractPosixTerminal) {
+                        sb.append(" with pty ")
+                                .append(((AbstractPosixTerminal) terminal)
+                                        .getPty()
+                                        .getClass()
+                                        .getName());
+                    }
+                    out.println(sb);
+                } catch (Throwable t3) {
+                    out.println("Unable to read from terminal: " + t3);
+                    printStackTrace(t3, out);
+                } finally {
+                    terminal.setAttributes(attr);
+                }
+            } else {
+                out.println("Not supported by provider");
+            }
+        } catch (Throwable t2) {
+            out.println("Unable to open terminal: " + t2);
+            printStackTrace(t2, out);
+        }
+    }
+
+    private static void printStackTrace(Throwable t, PrintStream out) {
+        t.printStackTrace(out);
+        if (t.getCause() == null) {
+            out.println("No cause in the Throwable");
+        } else {
+            printStackTrace(t, out);
+        }
+    }
+
+    static <S> S load(Class<S> clazz) {
+        return ServiceLoader.load(clazz, clazz.getClassLoader()).iterator().next();
+    }
+}