From 17286e993c850ca5f54e8b23e6fc3f486981c0b2 Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Sat, 22 Oct 2011 22:18:44 +0200
Subject: [PATCH] Add exception when json files can not be read

---
 src/Composer/Json/JsonFile.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/Composer/Json/JsonFile.php b/src/Composer/Json/JsonFile.php
index 3aeadc60f..8950545d2 100644
--- a/src/Composer/Json/JsonFile.php
+++ b/src/Composer/Json/JsonFile.php
@@ -58,6 +58,9 @@ class JsonFile
         ));
 
         $json = file_get_contents($this->path, false, $context);
+        if (!$json) {
+            throw new \RuntimeException('Could not read '.$this->path.', you are probably offline');
+        }
 
         return static::parseJson($json);
     }