SF 3.4 inject bundle config in services - symfony

Question

Using Symfony 3.4, I just try a simple case for a new bundle (name: APiToolBundle).
Here is the content of src/ApiToolBundle/Resources/config/config.yml :
imports:
- { resource: parameters.yml }
api_tool:
api_url: %myapi_url%
api_authorization_name: 'Bearer'
This file is loaded by ApiToolBundleExtension :
public function load(array $configs, ContainerBuilder $container)
{
$configuration = new Configuration();
$config = $this->processConfiguration($configuration, $configs);
$loader = new Loader\YamlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
$loader->load('services.yml');
}
I have set the Configuration file too :
class Configuration implements ConfigurationInterface
{
public function getConfigTreeBuilder()
{
$treeBuilder = new TreeBuilder();
$rootNode = $treeBuilder->root('production_tool');
$rootNode
->children()
->scalarNode('api_url')->defaultValue('')->end()
->scalarNode('api_authorization_name')->defaultValue('')->end()
->end()
;
return $treeBuilder;
}
}
But then I just want to bind a config parameter to one of my service :
# src/ApiToolBundle/Resources/config/services.yml
ApiToolBundle\Service\MyApi:
bind:
$apiUrl: '%api_tool.api_url%'
I am based on this doc : https://symfony.com/doc/3.4/bundles/configuration.html
But I am not sure to understand everything, since they talk about mergin in other way ... Do I need to do something else to load my own bundle config file ?

Answer 1

This is indeed a bit tricky to grasp. The bundle configuration is distinct from the parameters you use in your service configuration (even though inside your config you can also define services, which seems a bit odd at first). This is one of the reasons why Symfony in Version 4 discouraged using the semantic configuration inside applications, not use bundles & configuration, and instead directly work with parameters and services instead.
You will need to map the configuration to parameters or directly inject them into the service where you need them, in case you don't want them to be publicly available to other services or to be pulled from the container using getParameter. You can do this in the Extension where you have access to the ContainerBuilder.
See for example the FrameworkExtension where you have large configs that change the container: https://github.com/symfony/symfony/blob/v3.4.30/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php#L194-L196
In your case it could look something like this:
public function load(array $configs, ContainerBuilder $container)
{
$configuration = new Configuration();
$config = $this->processConfiguration($configuration, $configs);
$loader = new Loader\YamlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
$loader->load('services.yml');
# Below is the new part, the rest is copied from your question
# If you only want to use the configuration values internally in your services:
$container->getDefinition('ApiToolBundle\Service\MyApi')->setArgument(
0 # Offset of the argument where you want to use the api url
$config['api_url']
);
# If you want to make the values publicly available as parameters:
$container->setParameter('api_tool.api_url', $config['api_url']);
}