lib/paperclip/processor_helpers.rb
module Paperclip module ProcessorHelpers class NoSuchProcessor < StandardError; end def processor(name) #:nodoc: @known_processors ||= {} if @known_processors[name.to_s] @known_processors[name.to_s] else name = name.to_s.camelize load_processor(name) unless Paperclip.const_defined?(name) processor = Paperclip.const_get(name) @known_processors[name.to_s] = processor end end def load_processor(name) if defined?(Rails.root) && Rails.root filename = "#{name.to_s.underscore}.rb" directories = %w(lib/paperclip lib/paperclip_processors) required = directories.map do |directory| pathname = File.expand_path(Rails.root.join(directory, filename)) file_exists = File.exist?(pathname) require pathname if file_exists file_exists end raise LoadError, "Could not find the '#{name}' processor in any of these paths: #{directories.join(', ')}" unless required.any? end end def clear_processors! @known_processors.try(:clear) end # You can add your own processor via the Paperclip configuration. Normally # Paperclip will load all processors from the # Rails.root/lib/paperclip_processors directory, but here you can add any # existing class using this mechanism. # # Paperclip.configure do |c| # c.register_processor :watermarker, WatermarkingProcessor.new # end def register_processor(name, processor) @known_processors ||= {} @known_processors[name.to_s] = processor end end end