Merge lp:~liuyq0307/lava-dispatcher/fix-853657 into lp:lava-dispatcher

[Yongqin Liu]

fix bug of 853657 that only the first image is cached.

[Paul Larson (pwlars)]

+1

review: Approve

=== modified file 'lava_dispatcher/utils.py'
--- lava_dispatcher/utils.py	2011-09-15 07:02:08 +0000
+++ lava_dispatcher/utils.py	2011-09-19 06:39:24 +0000
@@ -53,7 +53,9 @@
     else:
         file_location = download(url, path)
         try:
-            os.makedirs(os.path.dirname(cache_loc))
+            cache_dir = os.path.dirname(cache_loc)
+            if not os.path.exists(cache_dir):
+                os.makedirs(cache_dir)
             os.link(file_location, cache_loc)
         except OSError, err:
             #errno 18 is Invalid cross-device link