We could copy the existing recipe to make this on only available for 3.4 and up even if 3.3 is not maintained anymore (but we then just wouldn't do any updates anymore for the 3.3 recipe).

I kinda like this config: it’s nice to say “why do templates live here? Check out this config!”. And then you easily know how to add more paths.

I’m kind of a fan of including more config than we need in these files (but probably commented out with default values, most of the time).

So, I think the DX is better WITH the config. Wdyt?

Errors are odd right now: the path is mentioned two times...

Well, we could also think about improving the error message instead (i.e. checking if the default path is also part of the other configured paths?).

Maybe enhance the registration logic? The error message is accurate about what happens under the hood so this should remain :)

Maybe Twig shouldn't add the same namespace/path twice.

I kinda like this config: it’s nice to say “why do templates live here? Check out this config!”.

If we want to keep this config, what about to show the default_path instead? That's where it really lives.

Related to symfony/symfony#27728 I suppose?

I think this is a diffent issue, actually we're adding the root templates directory twice:

It's necessary only for 3.3, since 3.4 this path is already added through twig.default_path option. I bet for #416 (comment) + #416 (comment):

twig:
    default_path: '%kernel.project_dir%/templates'

even if it's the default value.

(3.3 is EOLed so we don't really care for it)

and we need to do the same for translation recipe, for consistency I guess?:

It has default_path option too since 3.4.

I agree that having this setting even if that's the default value is nice. Let's close.

@fabpot but behind this there is a problem:

• The default path is displayed twice for "Unable to find template" exception:

  Unable to find template "form/layoutt.html.twig" (looked into: /home/yceruto/github/symfony/symfony-demo/templates, /home/yceruto/github/symfony/symfony-demo/templates, /home/yceruto/github/symfony/symfony-demo/vendor/symfony/twig-bridge/Resources/views/Form).

• And debug:twig command shows:

   Loader Paths
   ------------
  
    --------------- ------------------------------------------------------ 
     Namespace       Paths                                                 
    --------------- ------------------------------------------------------ 
                                                                       
     (None)          - templates                                           
                     - templates                                           
                     - vendor/symfony/twig-bridge/Resources/views/Form 

Edit: See alternative #434 to solve it.

@yceruto I know, but that's something we need to fix on the Symfony side.

@fabpot that means we should avoid to add the same path twice in the Twig loader?

@yceruto Probably, yes