My Bundler proof .irbrc file including wirble, awesome_print, hirb, console logging and route helpers

.irbrc

require 'rubygems' unless defined? Gem # rubygems is only needed in 1.8

def unbundled_require(gem)
  
  loaded = false
  
  if defined?(::Bundler)
  
    Gem.path.each do |gems_path|
      gem_path = Dir.glob("#{gems_path}/gems/#{gem}*").last
      unless gem_path.nil? 
        $LOAD_PATH << "#{gem_path}/lib"
        require gem
        loaded = true
      end
    end
    
  else
    require gem
    loaded = true
  end
   
  raise(LoadError, "coudln't find #{gem}") unless loaded
  
  loaded
  
end

def load_gem(gem, &block)

  begin

    if unbundled_require gem
      yield if block_given?
    end
  
  rescue Exception => err
    warn "Couldn't load #{gem}: #{err}" 
  end

end

# Highlighting and other features
load_gem 'wirble' do
  Wirble.init
  Wirble.colorize
end

# Improved formatting for objects
load_gem 'awesome_print'

# Improved formatting for collections
load_gem 'hirb' do
  Hirb.enable
end

# Show log in Rails console
if defined? Rails
  require 'logger'
  if Rails.version =~ /^2\./ # Rails 2.3
     Object.const_set('RAILS_DEFAULT_LOGGER', Logger.new(STDOUT))
  else # Rails 3
     ActiveRecord::Base.logger = Logger.new(STDOUT)
  end
end

# Enable route helpers in Rails console
if defined? Rails
  include Rails.application.routes.url_helpers
  default_url_options[:host] = 'localhost'
  default_url_options[:port] = 3000
end

# Benchmarking helper (http://ozmm.org/posts/time_in_irb.html)
if defined? Benchmark
  def time(times = 1)
    ret = nil
    Benchmark.bm { |x| x.report { times.times { ret = yield } } }
    ret
  end
end

# Random time method
class Time
  def self.random(from=Time.at(0), to=Time.now)
    Time.at rand(to.to_f - from.to_f) + from.to_f
  end
end