cache.rb in carrierwave-0.5.8

- old
+ new

@@ -88,10 +88,15 @@
       end
 
       ##
       # Caches the given file. Calls process! to trigger any process callbacks.
       #
+      # By default, cache!() uses copy_to(), which operates by copying the file 
+      # to the cache, then deleting the original file.  If move_to_cache() is 
+      # overriden to return true, then cache!() uses move_to(), which simply 
+      # moves the file to the cache.  Useful for large files.
+      #
       # === Parameters
       #
       # [new_file (File, IOString, Tempfile)] any kind of file object
       #
       # === Raises
@@ -108,10 +113,14 @@
             self.cache_id = CarrierWave.generate_cache_id unless cache_id
 
             @filename = new_file.filename
             self.original_filename = new_file.filename
 
-            @file = new_file.copy_to(cache_path, permissions)
+            if move_to_cache
+              @file = new_file.move_to(cache_path, permissions)
+            else
+              @file = new_file.copy_to(cache_path, permissions)
+            end
           end
         end
       end
 
       ##