Delombok now works from the command line as:

java -jar lombok.jar delombok (args)

src/delombok/lombok/delombok/CommentPreservingParser.java

@@ -82,19 +82,19 @@ public class CommentPreservingParser {
 	
 	private static final Messager messager = new Messager() {
 		@Override public void printMessage(Kind kind, CharSequence msg) {
-			System.out.printf("M: %s: %s\n", kind, msg);
+			System.out.printf("%s: %s\n", kind, msg);
 		}
 		
 		@Override public void printMessage(Kind kind, CharSequence msg, Element e) {
-			System.out.printf("E: %s: %s\n", kind, msg);
+			System.out.printf("%s: %s\n", kind, msg);
 		}
 		
 		@Override public void printMessage(Kind kind, CharSequence msg, Element e, AnnotationMirror a) {
-			System.out.printf("A: %s: %s\n", kind, msg);
+			System.out.printf("%s: %s\n", kind, msg);
 		}
 		
 		@Override public void printMessage(Kind kind, CharSequence msg, Element e, AnnotationMirror a, AnnotationValue v) {
-			System.out.printf("V: %s: %s\n", kind, msg);
+			System.out.printf("%s: %s\n", kind, msg);
 		}
 	};
 	
@@ -122,7 +122,6 @@ public class CommentPreservingParser {
 				JavaFileObject sourceFile = compilationUnit.getSourceFile();
 				if (sourceFile != null) {
 					out.write(sourceFile.getCharContent(true).toString());
-					System.out.println(out.toString());
 					return;
 				}
 			}

src/delombok/lombok/delombok/Delombok.java

@@ -5,14 +5,26 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
+import java.io.OutputStream;
 import java.io.OutputStreamWriter;
 import java.io.PrintStream;
 import java.io.Writer;
 import java.nio.charset.Charset;
 import java.nio.charset.UnsupportedCharsetException;
+import java.util.ArrayList;
+import java.util.List;
 
 import lombok.delombok.CommentPreservingParser.ParseResult;
 
+import com.zwitserloot.cmdreader.CmdReader;
+import com.zwitserloot.cmdreader.Description;
+import com.zwitserloot.cmdreader.Excludes;
+import com.zwitserloot.cmdreader.InvalidCommandLineException;
+import com.zwitserloot.cmdreader.Mandatory;
+import com.zwitserloot.cmdreader.Parameterized;
+import com.zwitserloot.cmdreader.Sequential;
+import com.zwitserloot.cmdreader.Shorthand;
+
 public class Delombok {
 	private Charset charset = Charset.defaultCharset();
 	private CommentPreservingParser parser = new CommentPreservingParser();
@@ -23,6 +35,107 @@ public class Delombok {
 	/** If null, output to standard out. */
 	private File output = null;
 	
+	private static class CmdArgs {
+		@Shorthand("v")
+		@Description("Print the name of each file as it is being delombok-ed.")
+		@Excludes("quiet")
+		private boolean verbose;
+		
+		@Shorthand("q")
+		@Description("No warnings or errors will be emitted to standard error")
+		@Excludes("verbose")
+		private boolean quiet;
+		
+		@Shorthand("e")
+		@Description("Sets the encoding of your source files. Defaults to the system default charset. Example: \"UTF-8\"")
+		@Parameterized
+		private String encoding;
+		
+		@Shorthand("p")
+		@Description("Print delombok-ed code to standard output instead of saving it in target directory")
+		private boolean print;
+		
+		@Shorthand("d")
+		@Description("Directory to save delomboked files to")
+		@Mandatory(onlyIfNot="print")
+		@Parameterized
+		private String target;
+		
+		@Description("Files to delombok. Provide either a file, or a directory. If you use a directory, all files in it (recursive) are delombok-ed")
+		@Sequential
+		@Parameterized
+		private List<String> input = new ArrayList<String>();
+		
+		private boolean help;
+	}
+	
+	public static void main(String[] rawArgs) {
+		CmdReader<CmdArgs> reader = CmdReader.of(CmdArgs.class);
+		CmdArgs args;
+		try {
+			args = reader.make(rawArgs);
+		} catch (InvalidCommandLineException e) {
+			System.err.println("ERROR: " + e.getMessage());
+			System.err.println(reader.generateCommandLineHelp("delombok"));
+			System.exit(1);
+			return;
+		}
+		
+		if (args.help || args.input.isEmpty()) {
+			if (args.input.isEmpty()) System.err.println("ERROR: no files or directories to delombok specified.");
+			System.err.println(reader.generateCommandLineHelp("delombok"));
+			System.exit(args.input.isEmpty() ? 1 : 0);
+			return;
+		}
+		
+		Delombok delombok = new Delombok();
+		
+		if (args.quiet) delombok.setFeedback(new PrintStream(new OutputStream() {
+			@Override public void write(int b) throws IOException {
+				//dummy - do nothing.
+			}
+		}));
+		
+		if (args.encoding != null) {
+			try {
+				delombok.setCharset(args.encoding);
+			} catch (UnsupportedCharsetException e) {
+				System.err.println("ERROR: Not a known charset: " + args.encoding);
+				System.exit(1);
+				return;
+			}
+		}
+		
+		if (args.verbose) delombok.setVerbose(true);
+		if (args.print) delombok.setOutputToStandardOut();
+		else delombok.setOutput(new File(args.target));
+		
+		for (String in : args.input) {
+			try {
+				File f = new File(in);
+				if (f.isFile()) {
+					delombok.delombok(f.getParentFile(), f.getName());
+				} else if (f.isDirectory()) {
+					delombok.delombok(f);
+				} else if (!f.exists()) {
+					if (!args.quiet) System.err.println("WARNING: does not exist - skipping: " + f);
+				} else {
+					if (!args.quiet) System.err.println("WARNING: not a standard file or directory - skipping: " + f);
+				}
+			} catch (Exception e) {
+				if (!args.quiet) {
+					String msg = e.getMessage();
+					if (msg != null && msg.startsWith("DELOMBOK: ")) System.err.println(msg.substring("DELOMBOK: ".length()));
+					else {
+						e.printStackTrace();
+					}
+					System.exit(1);
+					return;
+				}
+			}
+		}
+	}
+	
 	public void setCharset(String charsetName) throws UnsupportedCharsetException {
 		charset = Charset.forName(charsetName);
 	}
@@ -40,7 +153,7 @@ public class Delombok {
 	}
 	
 	public void setOutput(File dir) {
-		if (dir.isFile()) throw new IllegalArgumentException(
+		if (dir.isFile() || (!dir.isDirectory() && dir.getName().endsWith(".java"))) throw new IllegalArgumentException(
 				"DELOMBOK: delombok will only write to a directory. " +
 				"If you want to delombok a single file, use -p to output to standard output, then redirect this to a file:\n" +
 				"delombok MyJavaFile.java -p >MyJavaFileDelombok.java");
@@ -57,20 +170,23 @@ public class Delombok {
 	
 	private void delombok0(File base, String suffix, int loop) throws IOException {
 		File dir = suffix.isEmpty() ? base : new File(base, suffix);
-		String name = suffix + File.separator + dir.getName();
+		String name = suffix;
 		
 		if (dir.isDirectory()) {
 			if (loop >= 100) {
 				feedback.printf("Over 100 subdirectories? I'm guessing there's a loop in your directory structure. Skipping: %s\n", suffix);
 			} else {
-				dir.mkdir();
-				delombok0(base, name, loop + 1);
+				for (File f : dir.listFiles()) {
+					delombok0(base, suffix + (suffix.isEmpty() ? "" : File.separator) + f.getName(), loop + 1);
+				}
 			}
 		} else if (dir.isFile()) {
 			String extension = getExtension(dir);
-			if (extension.equals(".java")) delombok(base, name);
-			else if (extension.equals(".class")) skipClass(name);
+			if (extension.equals("java")) delombok(base, name);
+			else if (extension.equals("class")) skipClass(name);
 			else copy(base, name);
+		} else if (!dir.exists()) {
+			feedback.printf("Skipping %s because it does not exist.\n", canonical(dir));
 		} else {
 			feedback.printf("Skipping %s because it is a special file type.\n", canonical(dir));
 		}
@@ -87,7 +203,9 @@ public class Delombok {
 		}
 		if (verbose) feedback.printf("Copying resource file: %s\n", fileName);
 		byte[] b = new byte[65536];
-		FileInputStream in = new FileInputStream(new File(base, fileName));
+		File outFile = new File(base, fileName);
+		outFile.getParentFile().mkdirs();
+		FileInputStream in = new FileInputStream(outFile);
 		try {
 			FileOutputStream out = new FileOutputStream(new File(output, fileName));
 			try {

src/installer/lombok/installer/Installer.java

@@ -64,6 +64,7 @@ import javax.swing.UIManager;
 import javax.swing.filechooser.FileFilter;
 
 import lombok.core.Version;
+import lombok.delombok.Delombok;
 import lombok.installer.EclipseFinder.OS;
 import lombok.installer.EclipseLocation.InstallException;
 import lombok.installer.EclipseLocation.NotAnEclipseException;
@@ -95,6 +96,12 @@ public class Installer {
 	private JButton installButton;
 	
 	public static void main(String[] args) {
+		if (args.length > 0 && args[0].equals("delombok")) {
+			String[] newArgs = new String[args.length-1];
+			System.arraycopy(args, 1, newArgs, 0, newArgs.length);
+			Delombok.main(newArgs);
+			return;
+		}
 		if (args.length > 0 && (args[0].equals("install") || args[0].equals("uninstall"))) {
 			boolean uninstall = args[0].equals("uninstall");
 			if (args.length < 3 || !args[1].equals("eclipse")) {