Moved style solidification to the post_process method, this also fixes the reprocess! method

lib/paperclip/attachment.rb

@@ -92,7 +92,6 @@ module Paperclip
 
       @dirty = true
 
-      solidify_style_definitions
       post_process if valid?
  
       # Reset the file size if the original file was reprocessed.
@@ -314,9 +313,8 @@ module Paperclip
 
     def solidify_style_definitions #:nodoc:
       @styles.each do |name, args|
-        if @styles[name][:geometry].respond_to?(:call)
-          @styles[name][:geometry] = @styles[name][:geometry].call(instance) 
-        end
+        @styles[name][:geometry] = @styles[name][:geometry].call(instance) if @styles[name][:geometry].respond_to?(:call)
+        @styles[name][:processors] = @styles[name][:processors].call(instance) if @styles[name][:processors].respond_to?(:call)
       end
     end
 
@@ -336,6 +334,7 @@ module Paperclip
 
     def post_process #:nodoc:
       return if @queued_for_write[:original].nil?
+      solidify_style_definitions
       return if fire_events(:before)
       post_process_styles
       return if fire_events(:after)

test/attachment_test.rb

@@ -265,7 +265,28 @@ class AttachmentTest < Test::Unit::TestCase
       end
     end
   end
-  
+
+  context "An attachment with :processors that is a proc" do
+    setup do
+      rebuild_model :styles => { :normal => '' }, :processors => lambda { |a| [ :test ] }
+      @attachment = Dummy.new.avatar
+    end
+
+    should "not run the proc immediately" do
+      assert_kind_of Proc, @attachment.styles[:normal][:processors]
+    end
+
+    context "when assigned" do
+      setup do
+        @attachment.assign(StringIO.new("."))
+      end
+
+      should "have the correct processors" do
+        assert_equal [ :test ], @attachment.styles[:normal][:processors]
+      end
+    end
+  end
+
   context "An attachment with erroring processor" do
     setup do
       rebuild_model :processor => [:thumbnail], :styles => { :small => '' }, :whiny_thumbnails => true

test/integration_test.rb

@@ -39,6 +39,7 @@ class IntegrationTest < Test::Unit::TestCase
       setup do
         Dummy.class_eval do
           has_attached_file :avatar, :styles => { :thumb => "150x25#" }
+          has_attached_file :avatar, :styles => { :thumb => "150x25#", :dynamic => lambda { |a| '50x50#' } }
         end
         @d2 = Dummy.find(@dummy.id)
         @d2.avatar.reprocess!
@@ -47,6 +48,7 @@ class IntegrationTest < Test::Unit::TestCase
 
       should "create its thumbnails properly" do
         assert_match /\b150x25\b/, `identify "#{@dummy.avatar.path(:thumb)}"`
+        assert_match /\b50x50\b/, `identify "#{@dummy.avatar.path(:dynamic)}"`
       end
     end
   end