feature #23694 [Form] Add debug:form command (yceruto)

This PR was merged into the 3.4 branch.

Discussion
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[Form] Add debug:form command

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | symfony/symfony#23688
| License       | MIT
| Doc PR        | -

![debug-form](https://user-images.githubusercontent.com/2028198/29007125-c3508cd6-7aca-11e7-91e2-c2b509847db5.png)

A short class name (e.g. `DateType`) can be passed as `class` argument too (the command will try to resolve its FQCN if it's in known form type namespaces).

Commits
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4f040d78fe Add debug:form command

Author: ogizanagi

DependencyInjection/FrameworkExtension.php

@@ -220,6 +220,8 @@ public function load(array $configs, ContainerBuilder $container)
             if (!class_exists('Symfony\Component\Validator\Validation')) {
                 throw new LogicException('The Validator component is required to use the Form component.');
             }
+        } else {
+            $container->removeDefinition('Symfony\Component\Form\Command\DebugCommand');
         }
 
         $this->registerSecurityCsrfConfiguration($config['csrf_protection'], $container, $loader);

Resources/config/console.xml

@@ -96,5 +96,11 @@
         <service id="Symfony\Bundle\FrameworkBundle\Command\YamlLintCommand">
             <tag name="console.command" command="lint:yaml" />
         </service>
+
+        <service id="Symfony\Component\Form\Command\DebugCommand">
+            <argument type="service" id="form.registry" />
+            <argument type="collection" /> <!-- All form types namespaces are stored here by FormPass -->
+            <tag name="console.command" command="debug:form" />
+        </service>
     </services>
 </container>

composer.json

@@ -40,7 +40,7 @@
         "symfony/dom-crawler": "~2.8|~3.0|~4.0",
         "symfony/polyfill-intl-icu": "~1.0",
         "symfony/security": "~2.8|~3.0|~4.0",
-        "symfony/form": "~3.3|~4.0",
+        "symfony/form": "~3.4|~4.0",
         "symfony/expression-language": "~2.8|~3.0|~4.0",
         "symfony/process": "~2.8|~3.0|~4.0",
         "symfony/security-core": "~3.2|~4.0",