[FrameworkBundle] Fixed Translation loader and update translation command.

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

@@ -116,6 +116,13 @@ EOF
             ? 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 @@ class TranslationLoader
      */
     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 @@ class TranslationWriter
         // 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);
     }