1 files changed, 21 insertions, 0 deletions
diff --git a/railties/lib/rails/rack/debugger.rb b/railties/lib/rails/rack/debugger.rb
new file mode 100644
index 0000000000..aa2711c616
--- /dev/null
+++ b/railties/lib/rails/rack/debugger.rb
@@ -0,0 +1,21 @@
+module Rails
+  module Rack
+    class Debugger
+      def initialize(app)
+        @app = app
+
+        require_library_or_gem 'ruby-debug'
+        ::Debugger.start
+        ::Debugger.settings[:autoeval] = true if ::Debugger.respond_to?(:settings)
+        puts "=> Debugger enabled"
+      rescue Exception
+        puts "You need to install ruby-debug to run the server in debugging mode. With gems, use 'gem install ruby-debug'"
+        exit
+      end
+
+      def call(env)
+        @app.call(env)
+      end
+    end
+  end
+end