unused.rb

desc 'Print out all unused routes'
task :unused => :environment do
  all_routes = ActionController::Routing::Routes.routes
  routes = all_routes.collect do |route|
    name = ActionController::Routing::Routes.named_routes.routes.index(route).to_s
    verb = route.conditions[:method].to_s.upcase
    segs = route.segments.inject("") { |str,s| str << s.to_s }
    segs.chop! if segs.length > 1
    reqs = route.requirements.empty? ? "" : route.requirements.inspect
    {:name => name, :verb => verb, :segs => segs, :reqs => reqs}
  end
  name_width = routes.collect {|r| r[:name]}.collect {|n| n.length}.max
  verb_width = routes.collect {|r| r[:verb]}.collect {|v| v.length}.max
  segs_width = routes.collect {|r| r[:segs]}.collect {|s| s.length}.max
  routes.each do |r|
    controller, action  = r[:reqs].scan(/"\b([_A-Za-z]+)\b/)
    next if controller.blank? or action.blank?
    action = action.to_s
    controller = "#{controller}_controller".camelcase.constantize
      if !controller.public_instance_methods.include?(action)
        puts "#{controller}##{action}"
      end
  end
end