Code examples for my blog about the new feature for Symfony Console Component - set a default command

app.php

<?php

use Acme\Command\HelloWorldCommand;
use Symfony\Component\Console\Application;

$command = new HelloWorldCommand();
$application = new Application();
$application->add($command);
$application->setDefaultCommand($command->getName());
$application->run();

HelloWorldCommand.php

namespace Acme\Command;

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

class HelloWorldCommand extends Command
{
    protected function configure()
    {
        $this->setName('hello:world')
            ->setDescription('Outputs \'Hello World\'');
    }

    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $output->writeln('Hello World');
    }
}