Add the basics of geographic data distribution and get the tests to work.

storage/basestorage.py

@@ -1,33 +1,8 @@
 import tempfile
 
 
-class BaseStorage(object):
-
-  """Storage is organized as follow:
-  $ROOT/images/<image_id>/json
-  $ROOT/images/<image_id>/layer
-  $ROOT/repositories/<namespace>/<repository_name>/<tag_name>
-  """
-
-  # Useful if we want to change those locations later without rewriting
-  # the code which uses Storage
-  repositories = 'repositories'
-  images = 'images'
+class StoragePaths(object):
   shared_images = 'sharedimages'
-  # Set the IO buffer to 64kB
-  buffer_size = 64 * 1024
-
-  @staticmethod
-  def temp_store_handler():
-    tmpf = tempfile.TemporaryFile()
-  
-    def fn(buf):
-      try:
-        tmpf.write(buf)
-      except IOError:
-        pass
-  
-    return tmpf, fn
 
   def image_path(self, storage_uuid):
     return '{0}/{1}/'.format(self.shared_images, storage_uuid)
@@ -52,6 +27,33 @@ class BaseStorage(object):
     base_path = self.image_path(storage_uuid)
     return '{0}diffs.json'.format(base_path)
 
+
+class BaseStorage(StoragePaths):
+  """Storage is organized as follow:
+  $ROOT/images/<image_id>/json
+  $ROOT/images/<image_id>/layer
+  $ROOT/repositories/<namespace>/<repository_name>/<tag_name>
+  """
+
+  # Useful if we want to change those locations later without rewriting
+  # the code which uses Storage
+  repositories = 'repositories'
+  images = 'images'
+  # Set the IO buffer to 64kB
+  buffer_size = 64 * 1024
+
+  @staticmethod
+  def temp_store_handler():
+    tmpf = tempfile.TemporaryFile()
+  
+    def fn(buf):
+      try:
+        tmpf.write(buf)
+      except IOError:
+        pass
+  
+    return tmpf, fn
+
   def get_direct_download_url(self, path, expires_in=60):
     return None