module Sprockets::Processing

end
data.gsub(...)
register_preprocessor 'text/css', :my_processor do |context, data|

A block can be passed for to create a shorthand processor.

register_preprocessor 'text/css', Sprockets::DirectiveProcessor

Registers a new Preprocessor `klass` for `mime_type`.

def register_preprocessor(*args, &block)
  register_config_processor(:preprocessors, *args, &block)
end