bug symfony#22422 [FrameworkBundle][Console][EventDispatcher] Fixed debug:event command (lyrixx)

This PR was merged into the 3.3-dev branch.

Discussion
----------

[FrameworkBundle][Console][EventDispatcher] Fixed debug:event command

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

---

before:

![screenshot5](https://cloud.githubusercontent.com/assets/408368/25013888/bcd561ba-2075-11e7-8538-b977420640d2.png)

after:

![screenshot6](https://cloud.githubusercontent.com/assets/408368/25013894/c2bc9332-2075-11e7-97f6-ebfcca70b23b.png)

Commits
-------

9960b7e [FrameworkBundle][Console][EventDispatcher] Fixed debug:event command

Author: nicolas-grekas

src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/Descriptor.php

@@ -311,4 +311,15 @@ protected function sortServiceIds(array $serviceIds)
 
         return $serviceIds;
     }
+
+    protected function formatClosure(\Closure $closure)
+    {
+        $r = new \ReflectionFunction($closure);
+
+        if (preg_match('#^/\*\* @closure-proxy ([^: ]++)::([^: ]++) \*/$#', $r->getDocComment(), $m)) {
+            return sprintf('%s::%s', $m[1], $m[2]);
+        }
+
+        return 'closure';
+    }
 }

src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/JsonDescriptor.php

@@ -363,7 +363,7 @@ private function getCallableData($callable, array $options = array())
         }
 
         if ($callable instanceof \Closure) {
-            $data['type'] = 'closure';
+            $data['type'] = $this->formatClosure($callable);
 
             return $data;
         }

src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/MarkdownDescriptor.php

@@ -343,7 +343,8 @@ protected function describeCallable($callable, array $options = array())
         }
 
         if ($callable instanceof \Closure) {
-            $string .= "\n- Type: `closure`";
+            $formatted = $this->formatClosure($callable);
+            $string .= "\n- Type: `$formatted`";
 
             return $this->write($string."\n");
         }

src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/TextDescriptor.php

@@ -466,7 +466,13 @@ private function formatCallable($callable)
         }
 
         if ($callable instanceof \Closure) {
-            return '\Closure()';
+            $formatted = $this->formatClosure($callable);
+
+            if ('closure' === $formatted) {
+                return '\Closure()';
+            }
+
+            return $formatted.'()';
         }
 
         if (method_exists($callable, '__invoke')) {

src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/XmlDescriptor.php

@@ -593,7 +593,7 @@ private function getCallableDocument($callable)
         }
 
         if ($callable instanceof \Closure) {
-            $callableXML->setAttribute('type', 'closure');
+            $callableXML->setAttribute('type', $this->formatClosure($callable));
 
             return $dom;
         }