carrierwave minimagick quality parameter to set jpeg quality

carrierwave_initializer.rb

# rails carrierwave initializer that gives you a quality option in your uploader. use:
#  version :medium do
#    process :resize_to_fit => [640, 480]
#    process :quality => 95
#  end


module CarrierWave
  module MiniMagick

    def quality(percentage)
      manipulate! do |img|
        img.write(current_path){ self.quality(percentage) }
        img = yield(img) if block_given?
        img
      end
    end

  end
end

@andreychernih This solution works for me too!