Support for Auto-Registering Event Subscribers

[mtotheikle]

Has anyone thought of this idea so that the following snippet is not required in a service file?

services:
    acme_demo.some.listener:
        class: %acme_demo.some.listener.class%
        tags:
            - { name: kernel.event_subscriber }

Is this functionality already there and I'm just overlooking it?

[docteurklein]

it's not implemented yet, so it would be a nice addition.
However, I often found myself that auto registration is not always helpful as soon as you have custom ctor dependencies (which is 90% of the time)

[gquemener]

Auto registration is meant to deal with trivial cases that causes pain to register manually IMHO. As soon as you have deps, it's not trivial anymore (or it should introspect class to understand ctor arguments, through typehint or phpdoc, and guess correct deps ==> Craaaazy)

[docteurklein]

yes, there are better tools for that: php-di and jms/di-extra do it perfectly.

The only thing we provide natively is if your class implements ContainerAwareInterface.
In that case, you'll still be able to get your deps, but the wrong way (e.g injecting the container is bad) :)

But we did it to quickly create a POC, without having to deal with DI config.
The idea was: create a class is the correct folder, (make it implement ContainerAware if you wish), and go