Document logger configuration

[ghost]

In the developer documentation of using Contao as a Symfony bundle there is no documentation of installing and configuring Monolog. https://docs.contao.org/dev/getting-started/initial-setup/symfony-application/contao-4.9/

I think Monolog is needed because in the Contao backend I get the following error:

Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException:
You have requested a non-existent service "monolog.logger.contao".

[fritzmg]

@bytehead can you have a look at this?

[bytehead]

I'll check!

[fritzmg]

It's now adjusted: #683

[ghost]

I added the contao handler to my monolog config. Now I get the following error message:

The "monolog.logger.contao" service or alias has been removed or inlined when the container was compiled. You should either make it public, or stop using the container directly and use dependency injection instead.

[bytehead]

What does this output in your installation?

$ php bin/console debug:container monolog.logger.contao

Information for Service "monolog.logger.contao"
===============================================

 ---------------- ---------------------------------------------------------------------------------- 
  Option           Value                                                                             
 ---------------- ---------------------------------------------------------------------------------- 
  Service ID       monolog.logger.contao                                                             
  Class            Symfony\Bridge\Monolog\Logger                                                     
  Tags             -                                                                                 
  Calls            pushProcessor, pushProcessor, pushHandler, pushHandler, pushHandler, pushHandler  
  Public           yes                                                                               
  Synthetic        no                                                                                
  Lazy             no                                                                                
  Shared           yes                                                                               
  Abstract         no                                                                                
  Autowired        no                                                                                
  Autoconfigured   no                                                                                
 ---------------- ---------------------------------------------------------------------------------- 

[bytehead]

The "monolog.logger.contao" service or alias has been removed or inlined when the container was compiled.

This can't be the case actually:

https://github.com/contao/contao/blob/c0d004eced89c222004481d4e12f885c8c8debe7/core-bundle/src/DependencyInjection/Compiler/MakeServicesPublicPass.php#L29

[bytehead]

Only if the service does not exist: https://github.com/contao/contao/blob/c0d004eced89c222004481d4e12f885c8c8debe7/core-bundle/src/DependencyInjection/Compiler/MakeServicesPublicPass.php#L46

[bytehead]

So I guess the error is somewhere else.

[ghost]

The output of the console command is:

 ---------------- --------------------------------------------------------------------- 
  Option           Value                                                                
 ---------------- --------------------------------------------------------------------- 
  Service ID       monolog.logger.contao                                                
  Class            Symfony\Bridge\Monolog\Logger                                        
  Tags             -                                                                    
  Calls            pushProcessor, pushProcessor, pushHandler, pushHandler, pushHandler  
  Public           no                                                                   
  Synthetic        no                                                                   
  Lazy             no                                                                   
  Shared           yes                                                                  
  Abstract         no                                                                   
  Autowired        no                                                                   
  Autoconfigured   no                                                                   
 ---------------- --------------------------------------------------------------------- 

The service is not public. How can I make it public?

[bytehead]

The service should be made public by Contao's MakeServicesPublicPass. Can you debug this line to see, if the service monolog.logger.contao is available at compile time?

[ghost]

I added the following dd:

if (!$container->hasDefinition($service)) {
    dd($service);
    continue;
}

It was never called so I added a dd at the start of the methode:

public function process(ContainerBuilder $container): void
{
    dd('test');
    // ...
}    

It was not called either.

[bytehead]

That explains why your service is not public. What about this line?

[ghost]

That is also not called. That is very strange. I thought that I can not have a Contao backend if the ContaoCoreBundle is not initialized. But I have a backend.

[bytehead]

That's really strange. How does your AppKernel look like?

[ghost]

namespace App;

use Symfony\Bundle\FrameworkBundle\Kernel\MicroKernelTrait;
use Symfony\Component\Config\Loader\LoaderInterface;
use Symfony\Component\Config\Resource\FileResource;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\HttpKernel\Kernel as BaseKernel;
use Symfony\Component\Routing\RouteCollectionBuilder;

class Kernel extends BaseKernel
{
    use MicroKernelTrait;

    private const CONFIG_EXTS = '.{php,xml,yaml,yml}';

    public function registerBundles(): iterable
    {
        $contents = require $this->getProjectDir().'/config/bundles.php';
        foreach ($contents as $class => $envs) {
            if ($envs[$this->environment] ?? $envs['all'] ?? false) {
                yield new $class();
            }
        }
    }

    public function getProjectDir(): string
    {
        return \dirname(__DIR__);
    }

    protected function configureContainer(ContainerBuilder $container, LoaderInterface $loader): void
    {
        $container->addResource(new FileResource($this->getProjectDir().'/config/bundles.php'));
        $container->setParameter('container.dumper.inline_class_loader', \PHP_VERSION_ID < 70400 || $this->debug);
        $container->setParameter('container.dumper.inline_factories', true);
        $confDir = $this->getProjectDir().'/config';

        $loader->load($confDir.'/{packages}/*'.self::CONFIG_EXTS, 'glob');
        $loader->load($confDir.'/{packages}/'.$this->environment.'/*'.self::CONFIG_EXTS, 'glob');
        $loader->load($confDir.'/{services}'.self::CONFIG_EXTS, 'glob');
        $loader->load($confDir.'/{services}_'.$this->environment.self::CONFIG_EXTS, 'glob');
    }

    protected function configureRoutes(RouteCollectionBuilder $routes): void
    {
        $confDir = $this->getProjectDir().'/config';

        $routes->import($confDir.'/{routes}/'.$this->environment.'/*'.self::CONFIG_EXTS, '/', 'glob');
        $routes->import($confDir.'/{routes}/*'.self::CONFIG_EXTS, '/', 'glob');
        $routes->import($confDir.'/{routes}'.self::CONFIG_EXTS, '/', 'glob');
    }
}

[ghost]

That is the normal Symfony Kernel. I did not do the steps in "Enable Cache and Front End Preview" in the documentation because I thought this was not mandatory.

[bytehead]

Hmm. Looks like the contao/core-bundle should be loaded then 🤔