bug symfony#13053 [FrameworkBundle] Fixed Translation loader and update translation command. (saro0h)

This PR was merged into the 2.3 branch.

Discussion
----------

[FrameworkBundle] Fixed Translation loader and update translation command.

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

This patch verifies that the directory to load translations exists in ``FrameworkBundle/Translation/TranslationLoader.php`` and stop the command if there are no translation found.

**Before, when loading messages** :
![capture d ecran 2014-12-20 a 14 55 52](https://cloud.githubusercontent.com/assets/667519/5515053/09f4655c-8859-11e4-8231-fc6587ace5eb.png)

**After, when loading messages** :
![capture d ecran 2014-12-20 a 15 01 36](https://cloud.githubusercontent.com/assets/667519/5515056/216a9fbc-8859-11e4-87a2-9e452df708a5.png)

---------------------------

**Before, when writing messages** :
![capture d ecran 2014-12-20 a 14 57 50](https://cloud.githubusercontent.com/assets/667519/5515058/508c3184-8859-11e4-9456-f8e47190d3cd.png)

**After, when writing messages** :
![capture d ecran 2014-12-20 a 15 03 47](https://cloud.githubusercontent.com/assets/667519/5515062/711f61d2-8859-11e4-8d15-d27700ac0a0f.png)

---------------------------

**Before when loading message and there was no messages found**:
![capture d ecran 2014-12-20 a 15 05 36](https://cloud.githubusercontent.com/assets/667519/5515065/afe422a4-8859-11e4-9d2d-8f8399555462.png)

**After when loading message and there was no messages found**:
![capture d ecran 2014-12-20 a 15 06 48](https://cloud.githubusercontent.com/assets/667519/5515070/da0247dc-8859-11e4-8cd7-127435441ffd.png)

Commits
-------

2ca438d [FrameworkBundle] Fixed Translation loader and update translation command.

Author: fabpot

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

@@ -116,6 +116,13 @@ protected function execute(InputInterface $input, OutputInterface $output)
             ? new DiffOperation($currentCatalogue, $extractedCatalogue)
             : new MergeOperation($currentCatalogue, $extractedCatalogue);
 
+        // Exit if no messages found.
+        if (!count($operation->getDomains())) {
+            $output->writeln("\n<comment>No translation found.</comment>");
+
+            return;
+        }
+
         // show compiled list of messages
         if ($input->getOption('dump-messages') === true) {
             foreach ($operation->getDomains() as $domain) {

src/Symfony/Bundle/FrameworkBundle/Translation/TranslationLoader.php

@@ -47,6 +47,10 @@ public function addLoader($format, LoaderInterface $loader)
      */
     public function loadMessages($directory, MessageCatalogue $catalogue)
     {
+        if (!is_dir($directory)) {
+            return;
+        }
+
         foreach ($this->loaders as $format => $loader) {
             // load any existing translation files
             $finder = new Finder();

src/Symfony/Component/Translation/Writer/TranslationWriter.php

@@ -67,6 +67,10 @@ public function writeTranslations(MessageCatalogue $catalogue, $format, $options
         // get the right dumper
         $dumper = $this->dumpers[$format];
 
+        if (isset($options['path']) && !is_dir($options['path'])) {
+            mkdir($options['path'], 0777, true);
+        }
+
         // save
         $dumper->dump($catalogue, $options);
     }