My .irbrc file on mac

.irbrc

require 'irb/completion'
require "irb/ext/save-history"

IRB.conf[:PROMPT_MODE] = :SIMPLE
IRB.conf[:SAVE_HISTORY] = 1000
IRB.conf[:HISTORY_FILE] = "#{ENV['HOME']}/.irb_history"

# Break out of the Bundler jail
# from https://github.com/ConradIrwin/pry-debundle/blob/master/lib/pry-debundle.rb
if defined? Bundler
  Gem.post_reset_hooks.reject! { |hook| hook.source_location.first =~ %r{/bundler/} }
  Gem::Specification.reset
  load 'rubygems/custom_require.rb'
end

# Use Wirb, Hirb, Clipboard and awesome_print by default !
if defined? Rails
  begin
    require 'wirb'
    Wirb.start
    require 'hirb'
    Hirb.enable
    require 'awesome_print'
    require 'clipboard'
  rescue LoadError
    Rails.logger.error "Unable to load. Check your ~/.irbrc file again !"
  end
end