only use logging if there's a log folder in the current directory

config/initializers/bullet.rb

@@ -3,7 +3,7 @@ if defined?(Bullet) && Rails.env.development?
     config.after_initialize do
       Bullet.enable = true
       # Bullet.alert = true
-      Bullet.bullet_logger = true
+      Bullet.bullet_logger = true if File.directory?('log') # fails if run from an engine
       Bullet.console = true
       # Bullet.growl = true
       Bullet.rails_logger = true