README

參考xdite's blog http://blog.xdite.net/?p=1839

建立一個名為railsc的執行檔，以monkey patch的方式啟用wirble及hirb
將railsc存到你PATH下，並設定可執行(chmod 755)
執行railsc取代rails c，即可載入wirble及hirb，不用修改project directory下的東西

P.S.
ActiveRecord::Base.logger = Logger.new(STDOUT)
這個我還是寫在.irbrc裡（事實上我是用show_log和hide_log開關）

Pros:
* 不用修改rails app下的檔案，也不用硬改rails gem中的程式
  (Survey其他人的project好用，clone下來不用改code)
Cons:
* 如果Railites內部API被修改，monkey patch可能會失效

railsc.rb

#!/usr/bin/env ruby

require 'rubygems'

version = ">= 0"

if ARGV.first =~ /^_(.*)_$/ and Gem::Version.correct? $1 then
  version = $1
  ARGV.shift
end

gem 'rails', version
require 'rails'
require 'rails/script_rails_loader'

# Monkey Patch

module Rails
  module ScriptRailsLoader
    def self.exec_script_rails!
      cwd = Dir.pwd
      return unless in_rails_application? || in_rails_application_subdirectory?
      exec_script_rails_with_exts! if in_rails_application?
      Dir.chdir("..") do
        # Recurse in a chdir block: if the search fails we want to be sure
        # the application is generated in the original working directory.
        exec_script_rails! unless cwd == Dir.pwd
      end
    rescue SystemCallError
      # could not chdir, no problem just return
    end

    def self.exec_script_rails_with_exts!
      script = File.read(SCRIPT_RAILS)
      script.gsub!('__FILE__', "'#{File.join(Dir.pwd, SCRIPT_RAILS)}'")
      script = <<-EOS
        require 'rubygems'
        require "irb"

        begin
          gem 'wirble'
          require 'wirble'
          Wirble.init
          Wirble.colorize
        rescue LoadError
          puts "Wirble is not loaded!!(Missing gem?)"
        end

        begin
          gem 'wirble'
          require 'hirb'
          Hirb.enable
        rescue LoadError
          puts "Hirb is not loaded!!(Missing gem?)"
        end

        #{script}
      EOS
      # puts script
      exec RUBY, "-e", script, "c" if in_rails_application?
    end
  end
end

load Gem.bin_path('rails', 'rails', version)