Carrierwave - how to pass block to resize_and_pad

Question

I have a collection of conversions that I want applied to ALL versions. I've looked at the source for minimagick's resize_and_pad method and it looks like it yields to a block if given. How do I get that block to the method when calling 'process'?

do_everything_else = proc { |img|
    img.format('jpg') do |i|
        i.quality 100
        i.antialias
        i.background :white
        i.flatten
        i.unsharp '0.3x0.3+5+0'
    end
}
version :croppable, :if => :new_upload? do
    # This results in 'too many arguments' error...
    process :resize_and_pad => [1200, 1200, 'white', 'Center', do_everything_else]
end

Answer 1

The answer is: process :resize_and_pad => [1200, 1200, 'white'] { |img| do_everything_else.call img }

No idea why I can't just use process :resize_and_pad => [1200, 1200, 'white'] do_everything_else

EDIT: Cancel that, nothing happens! The block isn't even run...I put a direct block in there and also put in a "raise 'WTF'.inspect" and no error popped up. I don't know if there's any way to do this...it seems the yield(img) in minimagick's methods are useless as there's no way to pass a block to the method at all by using 'process'.