# HG changeset patch
# User Jaroslav Tulach <jaroslav.tulach@apidesign.org>
# Date 1350399082 -7200
# Node ID b19d12a9e6d55eeb803623818615b6d1dfd10978
# Parent  7e3f72897a839822b11f27ce73fc2858e5b93bbe
Maven mojo to generate the Javascript during compilation phase

diff -r 7e3f72897a83 -r b19d12a9e6d5 htmlpage/pom.xml
--- a/htmlpage/pom.xml	Tue Oct 16 13:23:04 2012 +0200
+++ b/htmlpage/pom.xml	Tue Oct 16 16:51:22 2012 +0200
@@ -7,7 +7,7 @@
     <artifactId>bck2brwsr</artifactId>
     <version>1.0-SNAPSHOT</version>
   </parent>
-  <groupId>org.apidesign</groupId>
+  <groupId>org.apidesign.bck2brwsr</groupId>
   <artifactId>htmlpage</artifactId>
   <version>1.0-SNAPSHOT</version>
   <name>htmlpage</name>
diff -r 7e3f72897a83 -r b19d12a9e6d5 mojo/pom.xml
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mojo/pom.xml	Tue Oct 16 16:51:22 2012 +0200
@@ -0,0 +1,66 @@
+<?xml version="1.0"?>
+<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+  <modelVersion>4.0.0</modelVersion>
+  <parent>
+    <groupId>org.apidesign</groupId>
+    <artifactId>bck2brwsr</artifactId>
+    <version>1.0-SNAPSHOT</version>
+  </parent>
+  <groupId>org.apidesign.bck2brwsr</groupId>
+  <artifactId>mojo</artifactId>
+  <version>1.0-SNAPSHOT</version>
+  <packaging>maven-plugin</packaging>
+  <name>Maven Mojo to Compile to JavaScript</name>
+  <url>http://maven.apache.org</url>
+      <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-plugin-plugin</artifactId>
+                <version>3.1</version>
+                <configuration>
+                    <extractors>
+                        <extractor>java-annotations</extractor>
+                    </extractors>
+                    <skipErrorNoDescriptorsFound>true</skipErrorNoDescriptorsFound>
+                 </configuration>
+                <executions>
+                    <execution>
+                        <id>mojo-descriptor</id>
+                        <phase>process-classes</phase>
+                        <goals>
+                            <goal>descriptor</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+      </build>
+      
+<dependencies>
+    <dependency>
+      <groupId>org.apache.maven</groupId>
+      <artifactId>maven-plugin-api</artifactId>
+      <version>3.0.4</version>
+      <type>jar</type>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.maven.plugin-tools</groupId>
+      <artifactId>maven-plugin-annotations</artifactId>
+      <version>3.0</version>
+      <type>jar</type>
+    </dependency>
+    <dependency>
+      <groupId>${project.groupId}</groupId>
+      <artifactId>vm4brwsr</artifactId>
+      <version>0.1-SNAPSHOT</version>
+    </dependency>
+    <dependency>
+        <groupId>org.apache.maven</groupId>
+        <artifactId>maven-core</artifactId>
+      <version>3.0.2</version>
+      <type>jar</type>
+    </dependency>
+</dependencies>
+</project>
diff -r 7e3f72897a83 -r b19d12a9e6d5 mojo/src/main/java/org/apidesign/bck2brwsr/mojo/Bck2BrswrMojo.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mojo/src/main/java/org/apidesign/bck2brwsr/mojo/Bck2BrswrMojo.java	Tue Oct 16 16:51:22 2012 +0200
@@ -0,0 +1,100 @@
+package org.apidesign.bck2brwsr.mojo;
+
+import org.apache.maven.plugin.AbstractMojo;
+
+import java.io.File;
+import java.io.FileWriter;
+import java.lang.reflect.Method;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import org.apache.maven.artifact.Artifact;
+import org.apache.maven.model.Dependency;
+import org.apache.maven.plugin.MojoExecutionException;
+import org.apache.maven.plugins.annotations.Component;
+import org.apache.maven.plugins.annotations.LifecyclePhase;
+import org.apache.maven.plugins.annotations.Mojo;
+import org.apache.maven.plugins.annotations.Parameter;
+import org.apache.maven.project.MavenProject;
+
+/** Compiles classes into JavaScript. */
+@Mojo(name="j2js", defaultPhase=LifecyclePhase.PROCESS_CLASSES)
+public class Bck2BrswrMojo extends AbstractMojo {
+    public Bck2BrswrMojo() {
+    }
+    /** Root of the class files */
+    @Parameter(defaultValue="${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());
+    }
+}
diff -r 7e3f72897a83 -r b19d12a9e6d5 pom.xml
--- a/pom.xml	Tue Oct 16 13:23:04 2012 +0200
+++ b/pom.xml	Tue Oct 16 16:51:22 2012 +0200
@@ -11,6 +11,7 @@
     <module>htmlpage</module>
     <module>emul</module>
     <module>core</module>
+    <module>mojo</module>
   </modules>
   <licenses>
       <license>
diff -r 7e3f72897a83 -r b19d12a9e6d5 vm/src/main/java/org/apidesign/vm4brwsr/GenJS.java
--- a/vm/src/main/java/org/apidesign/vm4brwsr/GenJS.java	Tue Oct 16 13:23:04 2012 +0200
+++ b/vm/src/main/java/org/apidesign/vm4brwsr/GenJS.java	Tue Oct 16 16:51:22 2012 +0200
@@ -55,6 +55,9 @@
         compile(out, Arrays.asList(names));
     }
     static void compile(Appendable out, List<String> names) throws IOException {
+        compile(GenJS.class.getClassLoader(), out, names);
+    }
+    static void compile(ClassLoader l, Appendable out, List<String> names) throws IOException {
         for (String baseClass : names) {
             Map<String,String> processed = new HashMap<String, String>();
             LinkedList<String> toProcess = new LinkedList<String>();
@@ -92,7 +95,7 @@
                     processed.put(name, "");
                     continue;
                 }            
-                InputStream is = loadClass(name);
+                InputStream is = loadClass(l, name);
                 if (is == null) {
                     throw new IOException("Can't find class " + name); 
                 }
@@ -119,7 +122,10 @@
                     }
                 }
                 for (String resource : scripts) {
-                    InputStream emul = GenJS.class.getResourceAsStream(resource);
+                    while (resource.startsWith("/")) {
+                        resource = resource.substring(1);
+                    }
+                    InputStream emul = l.getResourceAsStream(resource);
                     if (emul == null) {
                         throw new IOException("Can't find " + resource);
                     }
@@ -183,12 +189,13 @@
         }
     }
 
-    private static InputStream loadClass(String name) throws IOException {
-        Enumeration<URL> en = ClassLoader.getSystemClassLoader().getResources(name + ".class");
+    private static InputStream loadClass(ClassLoader l, String name) throws IOException {
+        Enumeration<URL> en = l.getResources(name + ".class");
         URL u = null;
         while (en.hasMoreElements()) {
             u = en.nextElement();
         }
+        System.err.println("loader: " + l + " url : " + u);
         if (u == null) {
             throw new IOException("Can't find " + name);
         }