initializer to load debugger

debugger.rake

#lib/tasks/debugger.rake
task :restart do
  system("touch tmp/restart.txt")
end

task :debug => :restart do
  system("touch tmp/debug.txt")
  puts "after hitting a page, type `rdebug -c` to debug"
end

# or
# bundle exec rdebug -c

debugger.rb

# config/initializers/debugger.rb
if Rails.env.development?
  if File.exists?(File.join(Rails.root,'tmp', 'debug.txt'))
    require 'rdebug/base'
    require 'ruby-debug'
    Debugger.wait_connection = true
    Rails.logger.debug('Waiting for debugger: type `rdebug -c` to debug')
    Debugger.start_remote
    Rails.logger.debug('debugger connected')
    File.delete(File.join(Rails.root,'tmp', 'debug.txt'))
  end
end

Gemfile

gem 'rdebug', '0.1', :group => :development, :require => false