new_contents: from __future__ import absolute_import, division, print_function, unicode_literals
  
  from os import path
  import sh
  from nib import Processor, resource
  
  @resource(['.sass', '.scss'])
  class SassProcessor(Processor):
      def resource(self, resource):
          filepath = path.join(self.options['resource_path'],
                               resource.path + resource.extension)
          resource.content = bytearray(str(sh.sass(filepath)), 'utf-8')
          resource.extension = '.css'
  
          return resource
  
subject: Add support for SASS/SCSS