backupscript/src/CommandShow.php

<?php
namespace App;

use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Helper\Table;

use Symfony\Component\Yaml\Yaml;
use Symfony\Component\Yaml\Exception\ParseException;

class CommandShow extends Command
{
    static $defaultName = "show";
    static $defaultDescription = "Show all backup entries";

    protected function configure(): void
    {
        $this->addArgument('config', InputArgument::OPTIONAL, 'Configuration file', "config.yml");
    }

    protected function execute(InputInterface $input, OutputInterface $output): int
    {
        $output->writeln('Reading from: '.$input->getArgument('config'));
        try {
            $config = Yaml::parseFile($input->getArgument('config'));
        } catch (ParseException $e) {
            $output->writeln('Unable to parse the YAML string: '. $e->getMessage());
        }
        $table = new Table($output);
        $table
            ->setHeaders(['Description', 'Source', 'Destination'])
            ->setRows($config['backup']);
        ;
        $table->render();        

        return Command::SUCCESS;
    }
}