This improves, for example, the exception one would receive if they tried to import a resource from a bundle that doesn't exist.
Previously, the deep "bundle is not activated" exception would be thrown. That has value, however there is no indication of where
the exception is actually occurring.
In this new implementation, we throw an exception that explains exactly which resource, and from which source resource, cannot be
loaded. The deeper exception is still thrown as a nested exception.
Two caveats:
* The `HttpKernel::varToString` method was replicated
* This introduces a new `Exception` class, which allows us to prevent lot's of exceptions from nesting into each other in the case
that some deeply imported resource cannot be imported (each upstream import that fails doesn't add its own exception).
How to upgrade?
For XML configuration files:
* All extensions should now use the config tag (this is just a convention as
the YAML configurations files do not use it anymore):
* The previous change means that the doctrine and security bundles now are
wrapped under a main "config" tag:
<doctrine:config>
<doctrine:orm />
<doctrine:dbal />
</doctrine:config>
<security:config>
<security:acl />
...
</security:config>
For YAML configuration files:
* The main keys have been renamed as follows:
* assetic:config -> assetic
* app:config -> framework
* webprofiler:config -> web_profiler
* doctrine_odm.mongodb -> doctrine_mongo_db
* doctrine:orm -> doctrine: { orm: ... }
* doctrine:dbal -> doctrine: { dbal: ... }
* security:config -> security
* security:acl -> security: { acl: ... }
* twig.config -> twig
* zend.config -> zend
This reverts commit f53080860a.
Revert "[Router] config fixes"
This reverts commit 51beecc6f2.
Revert "moved duplicated files to a new Config component"
This reverts commit a8ec9b27f0.
Previously, the Definition class was used both for type inference and factory construction (if factoryService was absent). This is fine for cases where classes create instances of themselves (e.g. getInstance() or create()), but leads to ambiguity when we have a separate factory class.
