ZD-52550 (better startup diagnostic)

bin/scripts/unix/idea.sh

@@ -178,5 +178,6 @@ while true ; do
     $REQUIRED_JVM_ARGS \
     $MAIN_CLASS_NAME \
     "$@"
-  test $? -ne 88 && break
+  EC=$?
+  test $EC -ne 88 && exit $EC
 done

platform/bootstrap/src/com/intellij/idea/Main.java

@@ -35,11 +35,14 @@ import java.util.Locale;
 
 @SuppressWarnings({"UseOfSystemOutOrSystemErr", "MethodNamesDifferingOnlyByCase"})
 public class Main {
-  public static final int UPDATE_FAILED = 1;
-  public static final int STARTUP_EXCEPTION = 2;
-  public static final int STARTUP_IMPOSSIBLE = 3;
-  public static final int LICENSE_ERROR = 4;
-  public static final int PLUGIN_ERROR = 5;
+  public static final int NO_GRAPHICS = 1;
+  public static final int UPDATE_FAILED = 2;
+  public static final int STARTUP_EXCEPTION = 3;
+  public static final int JDK_CHECK_FAILED = 4;
+  public static final int DIR_CHECK_FAILED = 5;
+  public static final int INSTANCE_CHECK_FAILED = 6;
+  public static final int LICENSE_ERROR = 7;
+  public static final int PLUGIN_ERROR = 8;
 
   private static final String AWT_HEADLESS = "java.awt.headless";
   private static final String PLATFORM_PREFIX_PROPERTY = "idea.platform.prefix";
@@ -60,19 +63,17 @@ public class Main {
     if (isHeadless()) {
       System.setProperty(AWT_HEADLESS, Boolean.TRUE.toString());
     }
-    else {
-      if (GraphicsEnvironment.isHeadless()) {
-        throw new HeadlessException("Unable to detect graphics environment");
+    else if (GraphicsEnvironment.isHeadless()) {
+      showMessage("Startup Error", "Unable to detect graphics environment", true);
+      System.exit(NO_GRAPHICS);
+    }
+    else if (args.length == 0) {
+      try {
+        installPatch();
       }
-
-      if (args.length == 0) {
-        try {
-          installPatch();
-        }
-        catch (Throwable t) {
-          showMessage("Update Failed", t);
-          System.exit(UPDATE_FAILED);
-        }
+      catch (Throwable t) {
+        showMessage("Update Failed", t);
+        System.exit(UPDATE_FAILED);
       }
     }
 
@@ -216,7 +217,7 @@ public class Main {
 
   @SuppressWarnings({"UseJBColor", "UndesirableClassUsage"})
   public static void showMessage(String title, String message, boolean error) {
-    if (isCommandLine()) {
+    if (isCommandLine() || GraphicsEnvironment.isHeadless()) {
       PrintStream stream = error ? System.err : System.out;
       stream.println("\n" + title + ": " + message);
     }

platform/platform-impl/src/com/intellij/idea/IdeaApplication.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2014 JetBrains s.r.o.
+ * Copyright 2000-2015 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -118,7 +118,7 @@ public class IdeaApplication {
 
     if (headless && myStarter instanceof ApplicationStarterEx && !((ApplicationStarterEx)myStarter).isHeadless()) {
       Main.showMessage("Startup Error", "Application cannot start in headless mode", true);
-      System.exit(Main.STARTUP_IMPOSSIBLE);
+      System.exit(Main.NO_GRAPHICS);
     }
 
     myStarter.premain(args);

platform/platform-impl/src/com/intellij/idea/StartupUtil.java

@@ -88,9 +88,15 @@ public class StartupUtil {
       newConfigFolder = !new File(PathManager.getConfigPath()).exists();
     }
 
-    boolean canStart = checkJdkVersion() && checkSystemFolders() && lockSystemFolders(args);  // note: uses config folder!
-    if (!canStart) {
-      System.exit(Main.STARTUP_IMPOSSIBLE);
+    if (!checkJdkVersion()) {
+      System.exit(Main.JDK_CHECK_FAILED);
+    }
+    // note: uses config folder!
+    if (!checkSystemFolders()) {
+      System.exit(Main.DIR_CHECK_FAILED);
+    }
+    if (!lockSystemFolders(args)) {
+      System.exit(Main.INSTANCE_CHECK_FAILED);
     }
 
     if (newConfigFolder) {