Added new command to generate a Graphviz file of your project

Command/GraphvizCommand.php

@@ -0,0 +1,60 @@
+<?php
+
+namespace Propel\PropelBundle\Command;
+
+use Propel\PropelBundle\Command\PhingCommand;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Finder\Finder;
+use Symfony\Bundle\FrameworkBundle\Util\Filesystem;
+
+/*
+ * This file is part of the Symfony framework.
+ *
+ * (c) Fabien Potencier <fabien.potencier@symfony-project.com>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+/**
+ * GraphvizCommand.
+ *
+ * @author William DURAND <william.durand1@gmail.com>  
+ */
+class GraphvizCommand extends PhingCommand
+{
+    /**
+     * @see Command
+     */
+    protected function configure()
+    {
+        $this
+            ->setDescription('Generates Graphviz file for your project')
+            ->setHelp(<<<EOT
+The <info>propel:graphviz</info> generates Graphviz file for your project.
+          
+  <info>php app/console propel:graphviz</info>
+EOT
+            )
+            ->setName('propel:graphviz')
+        ;
+    }
+
+    /**
+     * @see Command
+     *
+     * @throws \InvalidArgumentException When the target directory does not exist
+     */
+    protected function execute(InputInterface $input, OutputInterface $output)
+    {  
+        $dest = $this->getApplication()->getKernel()->getRootDir() . '/propel/graph/';
+
+        $this->callPhing('graphviz', array(
+            'propel.graph.dir'    => $dest,
+        ));
+
+        $output->writeln(sprintf('Graphviz file is in "<info>%s</info>".', $dest));
+    }
+}