composer require symplify/package-builder

use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
use Symplify\PackageBuilder\Parameter\ParameterProvider;
use function Symfony\Component\DependencyInjection\Loader\Configurator\service;

return static function (ContainerConfigurator $containerConfigurator): void {
    $services = $containerConfigurator->services();

    $services->defaults()
        ->autowire()
        ->autoconfigure();

    $services->set(ParameterProvider::class)
        ->args([service('service_container')]);

    $parameter = $containerConfigurator->parameters();
    // will be used later
    $parameter->set('source', 'src');
};

parameterProvider->provideParameter('source'); // use specific typed method to avoid `mixed` return $this->parameterProvider->provideStringParameter('source'); } }">

namespace App\Configuration;

use Symplify\PackageBuilder\Parameter\ParameterProvider;

final class ProjectConfiguration
{
    /**
     * @var ParameterProvider
     */
    private $parameterProvider;

    public function __construct(ParameterProvider $parameterProvider)
    {
        $this->parameterProvider = $parameterProvider;
    }

    public function getSource(): string
    {
        // returns "src"
        return $this->parameterProvider->provideParameter('source');

        // use specific typed method to avoid `mixed`
        return $this->parameterProvider->provideStringParameter('source');
    }
}

use Symplify\PackageBuilder\Composer\VendorDirProvider;

$vendorDirProvider = new VendorDirProvider();
// returns path to vendor directory
$vendorDirProvider->provide();

namespace App;

use PhpCsFixer\Fixer\FixerInterface;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\HttpKernel\Kernel;
use Symplify\PackageBuilder\DependencyInjection\CompilerPass\AutowireInterfacesCompilerPass;

final class AppKernel extends Kernel
{
    protected function build(ContainerBuilder $containerBuilder): void
    {
        $containerBuilder->addCompilerPass(new AutowireInterfacesCompilerPass([FixerInterface::class]));
    }
}

use Symplify\ConsoleColorDiff\Console\Output\ConsoleDiffer;

class SomeCommand
{
    public function __construct(
        private ConsoleDiffer $consoleDiffer
    ) {
    }

    public function run(): void
    {
        // prints colored diff to the console output
        $this->consoleDiffer->diff('oldContent', 'newContent');
    }
}