New in Symfony 2.4: Dumping the default Configuration for an Extension

Warning: This post is about an unsupported Symfony version. Some of this information may be out of date. Read the most recent Symfony Docs.
Contributed by
Wouter De Jong
in #8635.
Did you know that Symfony comes with a command that outputs the default configuration for a bundle extension?
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$ ./app/console config:dump-reference twig
The output also contains documentation when provided by the extension:
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twig:
exception_controller: twig.controller.exception:showAction
form:
resources:
# Default:
- form_div_layout.html.twig
# Example:
- MyBundle::form.html.twig
globals:
# Examples:
foo: "@bar"
pi: 3.14
# Prototype
key:
id: ~
type: ~
value: ~
autoescape: ~
autoescape_service: ~
autoescape_service_method: ~
base_template_class: ~ # Example: Twig_Template
cache: '%kernel.cache_dir%/twig'
charset: '%kernel.charset%'
debug: '%kernel.debug%'
strict_variables: ~
auto_reload: ~
optimizations: ~
paths: []
This feature is not new, but as of 2.4, you can choose between the YAML and the XML format:
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$ ./app/console config:dump-reference twig --format=xml
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<!-- Default configuration for extension with alias: "twig" -->
<!-- Namespace: http://example.org/schema/dic/twig -->
<!-- base-template-class: Example: Twig_Template -->
<config
exception-controller="twig.controller.exception:showAction"
autoescape=""
autoescape-service="null"
autoescape-service-method="null"
base-template-class=""
cache="%kernel.cache_dir%/twig"
charset="%kernel.charset%"
debug="%kernel.debug%"
strict-variables=""
auto-reload=""
optimizations=""
>
<form>
<!-- prototype -->
<resource>form_div_layout.html.twig</resource>
</form>
<!-- prototype -->
<global
key="global key"
id=""
type=""
value=""
/>
<!-- prototype -->
<path>value</path>
</config>
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