A debugging/tracing tool for Ruby. Can be used interactively or non-interactively. While it is enabled, it will watch every Ruby statement and method call that gets executed and will display the source code that is being executed in real time on your screen. It is recommended that you also install arika-ruby-termios so that you don't have to press enter after each command.
Gemfile gem 'unroller', '~> 1.0.0'
install gem install unroller