IRB Console with history and logging

.irbrc

#! /usr/bin/env ruby
# -*- Ruby-*-
require 'irb/completion'
require 'irb/ext/save-history'

ARGV.concat [ "--readline",
              "--prompt-mode",
              "simple" ]

# 100 entries in the list
IRB.conf[:SAVE_HISTORY] = 100

# Store results in home directory with specified file name
IRB.conf[:HISTORY_FILE] = "#{ENV['HOME']}/.irb-history"

script_console_running = ENV.include?('RAILS_ENV') && IRB.conf[:LOAD_MODULES] && IRB.conf[:LOAD_MODULES].include?('console_with_helpers')
rails_running = ENV.include?('RAILS_ENV') && !(IRB.conf[:LOAD_MODULES] && IRB.conf[:LOAD_MODULES].include?('console_with_helpers'))
irb_standalone_running = !script_console_running && !rails_running

if script_console_running
  require 'logger'
  Object.const_set(:RAILS_DEFAULT_LOGGER, Logger.new(STDOUT))
end