A symfony command for eZPublish 5 that lists all available Legacy command-line scripts

gistfile1.php

<?php

namespace Acme\AppBundle\Command;

use Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;

class ListLegacyScriptsCommand extends ContainerAwareCommand
{
    protected function configure()
    {
        $this
            ->setName('acme:app:list_legacy_scripts')
            ->setDescription("Lists all available legacy scripts (php ones)")
        ;
    }

    protected function execute(InputInterface $input, OutputInterface $output)
    {
        // quick and dirty...
        exec("cd ezpublish_legacy && find -L bin/php -type f -name '*.php'", $binScripts, $retCode);
        exec ("cd ezpublish_legacy && find -L extension/ -type f -path 'extension/*/bin/*' -name '*.php'", $extScripts, $retCode);
        sort($extScripts);

        $out = array();
        $maxlen = 0;
        foreach(array_merge($binScripts, $extScripts) as $script) {
            $code = file_get_contents('ezpublish_legacy/'.$script);
            if (strpos($script, 'bin/php') === 0) {
                $ext = 'kernel';
            } else {
                preg_match('#extension/([^/]+)/#', $script, $matches);
                $ext = $matches[1];
            }
            $out[$ext][$script] = '';
            /// @todo use a better parser than this...
            if (preg_match('/(?:\$scriptSettings *\[ *)?[\'"]description[\'"](?: *\])? *=>? *\(? *[\'"](.*)[\'"]/', $code, $matches)) {
                $out[$ext][$script] = trim(str_replace(array("\n", '\n'), ' ', $matches[1]));
                $maxlen = (strlen($script) > $maxlen) ? strlen($script) : $maxlen;
            }
        }

        $output->writeln('');
        $output->writeln('<comment>Available commands:</comment>');

        foreach ($out as $ext => $scripts) {
            $output->writeln("<comment>$ext</comment>");
            foreach ($scripts as $name => $desc) {
                $output->writeln(' ' . "<info>$name</info>" . str_repeat(' ', $maxlen - strlen($name) + 1) . $desc);
            }
        }
    }
}