* print version/revision/jre identifier

* just print help if started with no arguments in headless mode instead of crashing when trying to start the GUI

source/net/sourceforge/filebot/Main.java

@@ -2,10 +2,11 @@
 package net.sourceforge.filebot;
 
 
+import static java.awt.GraphicsEnvironment.*;
 import static javax.swing.JFrame.*;
+import static net.sourceforge.filebot.Settings.*;
 import static net.sourceforge.tuned.ui.TunedUtilities.*;
 
-import java.awt.GraphicsEnvironment;
 import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
 import java.security.CodeSource;
@@ -39,7 +40,7 @@ public class Main {
 	/**
 	 * @param args
 	 */
-	public static void main(String... args) throws Exception {
+	public static void main(String... arguments) throws Exception {
 		// initialize this stuff before anything else
 		initializeCache();
 		initializeSecurityManager();
@@ -47,15 +48,20 @@ public class Main {
 		try {
 			// parse arguments
 			final ArgumentProcessor cli = new ArgumentProcessor();
-			final ArgumentBean argumentBean = cli.parse(args);
+			final ArgumentBean args = cli.parse(arguments);
 			
-			if (argumentBean.printHelp() || (GraphicsEnvironment.isHeadless() && !argumentBean.runCLI())) {
-				// just print help message and exit afterwards
-				cli.printHelp(argumentBean);
+			if (args.printHelp() || args.printVersion() || isHeadless()) {
+				System.out.format("%s / %s%n%n", getApplicationIdentifier(), getJavaRuntimeIdentifier());
+				
+				if (args.printHelp() || (!args.printVersion() && isHeadless())) {
+					cli.printHelp(args);
+				}
+				
+				// just print help message or version string and then exit
 				System.exit(0);
 			}
 			
-			if (argumentBean.clearUserData()) {
+			if (args.clearUserData()) {
 				// clear preferences and cache
 				System.out.println("Reset preferences and clear cache.");
 				Settings.forPackage(Main.class).clear();
@@ -63,11 +69,11 @@ public class Main {
 			}
 			
 			// initialize analytics
-			Analytics.setEnabled(!argumentBean.disableAnalytics);
+			Analytics.setEnabled(!args.disableAnalytics);
 			
 			// CLI mode => run command-line interface and then exit
-			if (argumentBean.runCLI()) {
-				int status = cli.process(argumentBean, new CmdlineOperations());
+			if (args.runCLI()) {
+				int status = cli.process(args, new CmdlineOperations());
 				System.exit(status);
 			}
 			
@@ -83,7 +89,7 @@ public class Main {
 						Logger.getLogger(Main.class.getName()).log(Level.WARNING, e.getMessage(), e);
 					}
 					
-					startUserInterface(argumentBean);
+					startUserInterface(args);
 				}
 			});
 		} catch (CmdLineException e) {

source/net/sourceforge/filebot/Settings.java

@@ -2,9 +2,16 @@
 package net.sourceforge.filebot;
 
 
+import static net.sourceforge.tuned.StringUtilities.*;
+
+import java.awt.GraphicsEnvironment;
 import java.io.File;
+import java.io.IOException;
 import java.util.Locale;
 import java.util.ResourceBundle;
+import java.util.jar.Manifest;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 import java.util.prefs.BackingStoreException;
 import java.util.prefs.Preferences;
 
@@ -129,4 +136,26 @@ public final class Settings {
 			throw ExceptionUtilities.asRuntimeException(e);
 		}
 	}
+	
+
+	public static String getApplicationIdentifier() {
+		String rev = null;
+		try {
+			Manifest manifest = new Manifest(Settings.class.getResourceAsStream("/META-INF/MANIFEST.MF"));
+			rev = manifest.getMainAttributes().getValue("Built-Revision");
+		} catch (IOException e) {
+			Logger.getLogger(Settings.class.getName()).log(Level.WARNING, e.getMessage());
+		}
+		
+		return joinBy(" ", getApplicationName(), getApplicationVersion(), String.format("(r%s)", rev != null ? rev : 0));
+	}
+	
+
+	public static String getJavaRuntimeIdentifier() {
+		String name = System.getProperty("java.runtime.name");
+		String version = System.getProperty("java.version");
+		String headless = GraphicsEnvironment.isHeadless() ? "(headless)" : null;
+		return joinBy(" ", name, version, headless);
+	}
+	
 }

source/net/sourceforge/filebot/cli/ArgumentBean.java

@@ -61,7 +61,7 @@ public class ArgumentBean {
 	@Option(name = "-mediainfo", usage = "Get media info")
 	public boolean mediaInfo = false;
 	
-	@Option(name = "-script", usage = "Run Groovy script")
+	@Option(name = "-script", usage = "Run Groovy script", metaVar = "robot.groovy")
 	public String script = null;
 	
 	@Option(name = "-trust-script", usage = "Lift scripting restrictions")
@@ -79,6 +79,9 @@ public class ArgumentBean {
 	@Option(name = "-no-analytics", usage = "Disable analytics")
 	public boolean disableAnalytics = false;
 	
+	@Option(name = "-version", usage = "Print version identifier")
+	public boolean version = false;
+	
 	@Option(name = "-help", usage = "Print this help message")
 	public boolean help = false;
 	
@@ -96,6 +99,11 @@ public class ArgumentBean {
 	}
 	
 
+	public boolean printVersion() {
+		return version;
+	}
+	
+
 	public boolean printHelp() {
 		return help;
 	}

source/net/sourceforge/tuned/StringUtilities.java

@@ -14,6 +14,11 @@ public final class StringUtilities {
 	}
 	
 
+	public static String joinBy(CharSequence delimiter, Object... values) {
+		return join(asList(values), delimiter);
+	}
+	
+
 	public static String join(Object[] values, CharSequence delimiter) {
 		return join(asList(values), delimiter);
 	}