Fix attachment.reprocess! when using storage providers fog and s3.

lib/paperclip/io_adapters/attachment_adapter.rb

@@ -30,6 +30,11 @@ module Paperclip
       @tempfile.read(length, buffer)
     end
 
+    # We don't use this directly, but aws/sdk does.
+    def rewind
+      @tempfile.rewind
+    end
+
     def eof?
       @tempfile.eof?
     end
@@ -50,7 +55,11 @@ module Paperclip
     def copy_to_tempfile(src)
       dest = Tempfile.new(src.original_filename)
       dest.binmode
-      FileUtils.cp(src.path(:original), dest.path)
+      if src.respond_to? :copy_to_local_file
+        src.copy_to_local_file(:original, dest.path)
+      else
+        FileUtils.cp(src.path(:original), dest.path)
+      end
       dest
     end
 

lib/paperclip/storage/fog.rb

@@ -135,6 +135,17 @@ module Paperclip
         (creds[env] || creds).symbolize_keys
       end
 
+      def copy_to_local_file(style, local_dest_path)
+        log("copying #{path(style)} to local file #{local_dest_path}")
+        local_file = ::File.open(local_dest_path, 'wb')
+        file = directory.files.get(path(style))
+        local_file.write(file.body)
+        local_file.close
+      rescue Fog::Errors::Error => e
+        warn("#{e} - cannot copy #{path(style)} to local file #{local_dest_path}")
+        false
+      end
+
       private
 
       def find_credentials(creds)

lib/paperclip/storage/s3.rb

@@ -307,6 +307,17 @@ module Paperclip
         @queued_for_delete = []
       end
 
+      def copy_to_local_file(style, local_dest_path)
+        log("copying #{path(style)} to local file #{local_dest_path}")
+        local_file = ::File.open(local_dest_path, 'wb')
+        file = s3_object(style)
+        local_file.write(file.read)
+        local_file.close
+      rescue AWS::Errors::Base => e
+        warn("#{e} - cannot copy #{path(style)} to local file #{local_dest_path}")
+        false
+      end
+
       def find_credentials creds
         case creds
         when File

test/storage/s3_live_test.rb

 require './test/helper'
 require 'aws'
 
-
 unless ENV["S3_BUCKET"].blank?
   class S3LiveTest < Test::Unit::TestCase
 
@@ -105,7 +104,11 @@ unless ENV["S3_BUCKET"].blank?
         assert_success_response @dummy.avatar.url
       end
 
-      should "be destoryable" do
+      should "be reprocessable" do
+        assert @dummy.avatar.reprocess!
+      end
+
+      should "be destroyable" do
         url = @dummy.avatar.url
         @dummy.destroy
         assert_not_found_response url