diff -r 000000000000 -r b19d12a9e6d5 mojo/src/main/java/org/apidesign/bck2brwsr/mojo/Bck2BrswrMojo.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mojo/src/main/java/org/apidesign/bck2brwsr/mojo/Bck2BrswrMojo.java	Tue Oct 16 16:51:22 2012 +0200
@@ -0,0 +1,100 @@
+package org.apidesign.bck2brwsr.mojo;
+
+import org.apache.maven.plugin.AbstractMojo;
+
+import java.io.File;
+import java.io.FileWriter;
+import java.lang.reflect.Method;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import org.apache.maven.artifact.Artifact;
+import org.apache.maven.model.Dependency;
+import org.apache.maven.plugin.MojoExecutionException;
+import org.apache.maven.plugins.annotations.Component;
+import org.apache.maven.plugins.annotations.LifecyclePhase;
+import org.apache.maven.plugins.annotations.Mojo;
+import org.apache.maven.plugins.annotations.Parameter;
+import org.apache.maven.project.MavenProject;
+
+/** Compiles classes into JavaScript. */
+@Mojo(name="j2js", defaultPhase=LifecyclePhase.PROCESS_CLASSES)
+public class Bck2BrswrMojo extends AbstractMojo {
+    public Bck2BrswrMojo() {
+    }
+    /** Root of the class files */
+    @Parameter(defaultValue="${project.build.directory}/classes")
+    private File classes;
+    /** File to generate. Defaults bootjava.js in the first non-empty 
+     package under the classes directory */
+    @Parameter
+    private File javascript;
+    
+    @Parameter(defaultValue="${project}")
+    private MavenProject prj;
+    
+    
+
+    @Override
+    public void execute() throws MojoExecutionException {
+        if (!classes.isDirectory()) {
+            throw new MojoExecutionException("Can't find " + classes);
+        }
+
+        if (javascript == null) {
+            javascript = new File(findNonEmptyFolder(classes), "bootjava.js");
+        }
+
+        List<String> arr = new ArrayList<String>();
+        collectAllClasses("", classes, arr);
+        
+        
+
+        try {
+            URLClassLoader url = buildClassLoader(classes, prj.getDependencyArtifacts());
+            
+            Class<?> c = Class.forName("org.apidesign.vm4brwsr.GenJS");
+            Method m = c.getDeclaredMethod("compile", ClassLoader.class, Appendable.class, List.class);
+            m.setAccessible(true);
+            FileWriter w = new FileWriter(javascript);
+            m.invoke(null, url, w, arr);
+            w.close();
+        } catch (Exception ex) {
+            throw new MojoExecutionException("Can't compile", ex);
+        }
+    }
+
+    private static File findNonEmptyFolder(File dir) throws MojoExecutionException {
+        if (!dir.isDirectory()) {
+            throw new MojoExecutionException("Not a directory " + dir);
+        }
+        File[] arr = dir.listFiles();
+        if (arr.length == 1 && arr[0].isDirectory()) {
+            return findNonEmptyFolder(arr[0]);
+        }
+        return dir;
+    }
+
+    private static void collectAllClasses(String prefix, File toCheck, List<String> arr) {
+        File[] files = toCheck.listFiles();
+        if (files != null) {
+            for (File f : files) {
+                collectAllClasses(prefix + f.getName() + "/", f, arr);
+            }
+        } else if (toCheck.getName().endsWith(".class")) {
+            arr.add(prefix.substring(0, prefix.length() - 7));
+        }
+    }
+
+    private static URLClassLoader buildClassLoader(File root, Collection<Artifact> deps) throws MalformedURLException {
+        List<URL> arr = new ArrayList<URL>();
+        arr.add(root.toURI().toURL());
+        for (Artifact a : deps) {
+            arr.add(a.getFile().toURI().toURL());
+        }
+        return new URLClassLoader(arr.toArray(new URL[0]), Bck2BrswrMojo.class.getClassLoader());
+    }
+}