Add support for earlier versions of Rails.

lib/pry-rails/commands.rb

@@ -12,10 +12,38 @@ module PryRails
       end
 
       def process
+        Rails.application.reload_routes!
         all_routes = Rails.application.routes.routes
-        require 'rails/application/route_inspector'
-        inspector = Rails::Application::RouteInspector.new
-        output.puts inspector.format(all_routes).grep(Regexp.new(opts[:G] || ".")).join "\n"
+
+        # cribbed from
+        # https://github.com/rails/rails/blob/3-1-stable/railties/lib/rails/tasks/routes.rake
+        all_routes = begin
+          require 'rails/application/route_inspector'
+          inspector = Rails::Application::RouteInspector.new
+          inspector.format(all_routes)
+        rescue LoadError => e
+          routes = all_routes.collect do |route|
+
+            reqs = route.requirements.dup
+            reqs[:to] = route.app unless route.app.class.name.to_s =~ /^ActionDispatch::Routing/
+              reqs = reqs.empty? ? "" : reqs.inspect
+
+            {:name => route.name.to_s, :verb => route.verb.to_s, :path => route.path, :reqs => reqs}
+          end
+
+          # Skip the route if it's internal info route
+          routes.reject! { |r| r[:path] =~ %r{/rails/info/properties|^/assets} }
+
+          name_width = routes.map{ |r| r[:name].length }.max
+          verb_width = routes.map{ |r| r[:verb].length }.max
+          path_width = routes.map{ |r| r[:path].length }.max
+
+          routes.map do |r|
+            "#{r[:name].rjust(name_width)} #{r[:verb].ljust(verb_width)} #{r[:path].ljust(path_width)} #{r[:reqs]}"
+          end
+        end
+
+        output.puts all_routes.grep(Regexp.new(opts[:G] || ".")).join "\n"
       end
     end
   end