[FrameworkBundle] container:debug : list services if no service match…

… exacly the name argument

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | symfony#11303
| License       | MIT
| Doc PR        |

If we launch the command "container:debug log" and there is no
service nammed log, it will print something like this :

```
[0] logger
[1] monolog.handler.console
[2] monolog.handler.debug
```

After the service has been chosen, usual container:debug informations
are displayed.

src/Symfony/Bundle/FrameworkBundle/Command/ContainerDebugCommand.php

@@ -19,6 +19,7 @@
 use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\Config\FileLocator;
+use Symfony\Component\Console\Question\ChoiceQuestion;
 
 /**
  * A console command for retrieving information about services.
@@ -106,6 +107,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
             $options = array('tag' => $tag, 'show_private' => $input->getOption('show-private'));
         } elseif ($name = $input->getArgument('name')) {
             $object = $this->getContainerBuilder();
+            $name = $this->findProperServiceName($input, $output, $object, $name);
             $options = array('id' => $name);
         } else {
             $object = $this->getContainerBuilder();
@@ -116,6 +118,10 @@ protected function execute(InputInterface $input, OutputInterface $output)
         $options['format'] = $input->getOption('format');
         $options['raw_text'] = $input->getOption('raw');
         $helper->describe($output, $object, $options);
+
+      if (!$input->getArgument('name') && posix_isatty(STDOUT)) {
+          $output->writeln('To search for a service, re-run this command with a search term. <comment>container:debug log</comment>');
+      }
     }
 
     /**
@@ -168,4 +174,48 @@ protected function getContainerBuilder()
 
         return $container;
     }
+
+    /**
+     * @param InputInterface $input
+     * @param OutputInterface $output
+     * @param ContainerBuilder $builder
+     * @param string $name
+     *
+     * @return string
+     */
+    protected function findProperServiceName(InputInterface $input, OutputInterface $output, ContainerBuilder $builder, $name)
+    {
+        if ($builder->has($name)) {
+          return $name;
+        }
+
+        $helper = $this->getApplication()->getHelperSet()->get('question');
+        $question = new ChoiceQuestion(
+            'Choose a number for more information on the service',
+            $this->findServiceidsLike($builder, $name)
+        );
+        $question->setErrorMessage('Service %s is invalid.');
+
+        return $helper->ask($input, $output, $question);
+    }
+
+    /**
+     * @param ContainerBuilder $builder
+     * @param string $name
+     *
+     * @return string
+     */
+    protected function findServiceIdsLike(ContainerBuilder $builder, $name)
+    {
+        $serviceIds = $builder->getServiceIds();
+        $foundServiceIds = array();
+        foreach ($serviceIds as $serviceId) {
+            if (false === strpos($serviceId, $name)) {
+                continue;
+            }
+            $foundServiceIds[] = $serviceId;
+        }
+
+        return $foundServiceIds;
+    }
 }