From 3c5f3e6dc7e953ccf44d78a88044c317d6b9e04e Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Fri, 14 Aug 2015 13:30:42 +0100
Subject: [PATCH] Warn if cache isnt writable as well

---
 src/Composer/Cache.php | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/src/Composer/Cache.php b/src/Composer/Cache.php
index 22e744fd2..9f9c55ba6 100644
--- a/src/Composer/Cache.php
+++ b/src/Composer/Cache.php
@@ -43,11 +43,12 @@ class Cache
         $this->whitelist = $whitelist;
         $this->filesystem = $filesystem ?: new Filesystem();
 
-        if (!is_dir($this->root)) {
-            if (!@mkdir($this->root, 0777, true)) {
-                $this->io->writeError('<warning>Cannot create cache directory ' . $this->root . ', proceeding without cache</warning>');
-                $this->enabled = false;
-            }
+        if (
+            (!is_dir($this->root) && !@mkdir($this->root, 0777, true))
+            || !is_writable($this->root)
+        ) {
+            $this->io->writeError('<warning>Cannot create cache directory ' . $this->root . ', or directory is not writable. Proceeding without cache</warning>');
+            $this->enabled = false;
         }
     }