compiler pass to get content of PLATFORM_VARIABLES env var of Platform.sh

PlatformShCompilerPass.php

<?php

namespace AppBundle\DependencyInjection\Compiler;

use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
use Symfony\Component\DependencyInjection\ContainerBuilder;

/**
 * @author Oskar Stark <oskarstark@googlemail.com>
 */
class PlatformShCompilerPass implements CompilerPassInterface
{
    public function process(ContainerBuilder $container)
    {
        if (getenv('PLATFORM_RELATIONSHIPS')) {
            $relationships = json_decode(base64_decode(getenv('PLATFORM_RELATIONSHIPS')), true);

            foreach ($relationships['database'] as $endpoint) {
                if (empty($endpoint['query']['is_master'])) {
                    continue;
                }

                $container->setParameter('database_driver', 'pdo_'.$endpoint['scheme']);
                $container->setParameter('database_host', $endpoint['host']);
                $container->setParameter('database_port', $endpoint['port']);
                $container->setParameter('database_name', $endpoint['path']);
                $container->setParameter('database_user', $endpoint['username']);
                $container->setParameter('database_password', $endpoint['password']);
                $container->setParameter('database_path', '');
            }

            if (isset($relationships['cache'][0])) {
                $container->setParameter('env(MEMCACHED_HOST)', $relationships['cache'][0]['host']);
                $container->setParameter('env(MEMCACHED_PORT)', $relationships['cache'][0]['port']);
            }
        }

        if (getenv('PLATFORM_VARIABLES')) {
            $variables = json_decode(base64_decode(getenv('PLATFORM_VARIABLES')), true);

            foreach ($variables as $key => $value) {
                // ignore php settings from .platform.app.yaml
                if ('php:' == substr($key, 0, 4)) {
                    continue;
                }

                $container->setParameter(sprintf('env(%s)', $key), $value);
            }
        }
    }
}