Kind of idea to load build properties in Propel2

AbstractCommand

<?php                                                                                                                                                    

/**
 * This file is part of the Propel package.
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 *
 * @license    MIT License
 */

namespace Propel\Generator\Command;

use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;

use Propel\Generator\Config\GeneratorConfig;
use Propel\Generator\Config\Loader\XmlLoader;

/**
 * @author William Durand <william.durand1@gmail.com>
 */
abstract class AbstractCommand extends Command
{
    // …

    /**
     */
    protected function loadGeneratorConfiguration()
    {
        $conf = $this->getProjectDirectory() . DIRECTORY_SEPARATOR . self::GENERATOR_CONF_FILENAME;

        if (!file_exists($conf)) {
            throw new \RuntimeException(sprintf('File "%s" not found in "%s".', self::GENERATOR_CONF_FILENAME, $this->getProjectDirectory()));
        }

        $properties = array();
        // Strategy to choose a loader needed here
        $loader = new XmlLoader();

        try {
            $properties = $loader->parse(\simplexml_load_file($conf));
        } catch (\Exception $e) {
            throw $e;
        }

        $this->generatorConfig->setBuildProperties($properties);
        var_dump($this->generatorConfig->getBuildProperties());
    }
}

generator-conf.xml

<?xml version="1.0" encoding="UTF-8"?>                                                                                                                   
<generator>
    <project>
        <name>bookstore</name>
        <dir>.</dir>
    </project>
    <namespace>
        <autoPackage>false</autoPackage>
    </namespace>
    <schema>
        <autoPackage>false</autoPackage>
        <autoNamespace>false</autoNamespace>
        <autoPrefix>false</autoPrefix>
        <validate>true</validate>
        <transform>false</transform>
        <tablePrefix></tablePrefix>
    </schema>
    <database>
        <platform>mysql</platform>
        <dsn>mysql:dbname=test</dsn>
        <user></user>
        <password></password>
        <schema></schema>
        <encoding></encoding>
        <!--
            buildUrl ?
            createUrl ?
        -->
    </database>
    <!-- … --->

LoaderInterface

<?php                                                                                                                                                    

namespace Propel\Generator\Config\Loader;

/**
 * @author William Durand <william.durand1@gmail.com>
 */
interface LoaderInterface
{
    /**
     * @return array
     */
    function parse($content);
}

Output

$ php bin/propel build:model --dir=tests/Fixtures/bookstore

array(11) {
  ["name"]=>
  string(9) "bookstore"
  ["dir"]=>
  string(1) "."
  ["namespaceAutoPackage"]=>
  bool(false)
  ["database"]=>
  string(5) "mysql"
  ["databasePlatform"]=>
  string(5) "mysql"
  ["databaseDsn"]=>
  string(17) "mysql:dbname=test"
  ["databaseUser"]=>
  string(0) ""
  ["databasePassword"]=>
  string(0) ""
  ["databaseSchema"]=>
  string(0) ""
  ["databaseEncoding"]=>
  string(0) ""
  ["databaseComment"]=>
  string(0) ""
}

XmlLoader

<?php
                                                                                                                                                         
namespace Propel\Generator\Config\Loader;

/**
 * @author William Durand <william.durand1@gmail.com>
 */
class XmlLoader implements LoaderInterface
{
    /** 
     * {@inheritDoc}
     */
    public function parse($content)
    {   
        $properties = array();

        $content = (array) $content;
        $project = (array) $content['project'];
        $namespace = (array) $content['namespace'];
        $database = (array) $content['database'];

        foreach ($project as $k => $v) {
            $properties['propel.'.$k] = $this->fixXmlValue((string) $v);
        }   

        foreach ($namespace as $k => $v) {
            $properties['propel.namespace.'.$k] = $this->fixXmlValue((string) $v);
        }   

        foreach ($database as $k => $v) {
            //
            // Here is an example of a convenient change.
            //
            if ('platform' === strtolower($k)) {
                $properties['propel.database'] = $this->fixXmlValue((string) $v);
            }   
            $properties['propel.database.'.$k] = $this->fixXmlValue((string) $v);
        }   

        // to be continued

        return $properties;
    }

    /** 
     * Fixes XML value.
     *
     * @return string|boolean
     */
    protected function fixXmlValue($value)
    {
        $lwr = strtolower($value);

        if ('false' === $lwr) {
            $value = false;
        } else if ('true' === $lwr) {
            $value = true;
        }

        return $value;
    }
}