From 3c0b0ae84d0eb792c87dc50ae1855a98d9f16807 Mon Sep 17 00:00:00 2001
From: Stepan Anchugov <kixxx1@gmail.com>
Date: Fri, 22 Jan 2016 03:51:50 +0500
Subject: [PATCH] Add Levenshtein suggesters to AbstractConfigCommand

---
 .../Command/AbstractConfigCommand.php         | 31 ++++++++++++++++---
 1 file changed, 27 insertions(+), 4 deletions(-)

diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/AbstractConfigCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/AbstractConfigCommand.php
index 23a446017909..f2e763f4eebf 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/AbstractConfigCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/AbstractConfigCommand.php
@@ -46,21 +46,44 @@ protected function listBundles($output)
     protected function findExtension($name)
     {
         $bundles = $this->initializeBundles();
+        $minScore = INF;
+
         foreach ($bundles as $bundle) {
             if ($name === $bundle->getName()) {
                 return $bundle->getContainerExtension();
             }
 
+            $distance = levenshtein($name, $bundle->getName());
+
+            if ($distance < $minScore) {
+                $guess = $bundle->getName();
+                $minScore = $distance;
+            }
+
             $extension = $bundle->getContainerExtension();
-            if ($extension && $name === $extension->getAlias()) {
-                return $extension;
+
+            if ($extension) {
+                if ($name === $extension->getAlias()) {
+                    return $extension;
+                }
+
+                $distance = levenshtein($name, $extension->getAlias());
+
+                if ($distance < $minScore) {
+                    $guess = $extension->getAlias();
+                    $minScore = $distance;
+                }
             }
         }
 
         if ('Bundle' !== substr($name, -6)) {
-            $message = sprintf('No extensions with configuration available for "%s"', $name);
+            $message = sprintf('No extensions with configuration available for "%s".', $name);
         } else {
-            $message = sprintf('No extension with alias "%s" is enabled', $name);
+            $message = sprintf('No extension with alias "%s" is enabled.', $name);
+        }
+
+        if (isset($guess) && $minScore < 3) {
+            $message .= sprintf("\n\nDid you mean \"%s\"?", $guess);
         }
 
         throw new \LogicException($message);