Have a Rails 2 app? You can run it on the newest Ruby!

## There's no way to know for sure if future Ruby versions will work,
## but so far the current one does:
ruby "2.1.1"

## The same for the `rake` gem:
rake "10.1.1"

## You might need the `iconv` gem:
gem "iconv"

## Replace:
## require "rake/rdoctask"
## with:
require "rake/task"

## Replace:
## require "config/environment"
## with:
require File.dirname(__FILE__) + "/config/environment"

## Include this before the `Rails::Initializer.run` line:
if RUBY_VERSION >= "2.0.0"
  module Gem
    def self.source_index
      sources
    end
    def self.cache
      sources
    end
    SourceIndex = Specification
    class SourceList
      # If you want vendor gems, this is where to start writing code.
      def search(*args); []; end
      def each(&block); end
      include Enumerable
    end
  end
end

## The patches below are needed when using an old version of PaperClip + Ruby 2.x
## https://github.com/thoughtbot/paperclip/issues/262
## https://github.com/thoughtbot/paperclip/commit/1bcfc14388d0651c5fc70ab9ca3511144c698903

module Paperclip
  class Tempfile < ::Tempfile
    def make_tmpname(basename, n)
      extension = File.extname(basename)
      sprintf("%s,%d,%d%s", File.basename(basename, extension), $$, n.to_i, extension)
    end
  end
end

module IOStream
  def to_tempfile
    name = respond_to?(:original_filename) ? original_filename : (respond_to?(:path) ? path : "stream")
    tempfile = Tempfile.new(["stream", File.extname(name)])
    tempfile.binmode
    self.stream_to(tempfile)
  end
end

## This is a very important monkey patch to make Rails 2.3.18 to work with Ruby 2+
## If you're thinking to remove it, really, don't, unless you know what you're doing.

if Rails::VERSION::MAJOR == 2 && RUBY_VERSION >= "2.0.0"
  module ActiveRecord
    module Associations
      class AssociationProxy
        def send(method, *args)
          if proxy_respond_to?(method, true)
            super
          else
            load_target
            @target.send(method, *args)
          end
        end
      end
    end
  end
end

undefined local variable or method `vars' for # Rails::Generator::Commands::Create

## This is a very important monkey patch to make Rails 2.3.18 to work with Ruby 2+
## If you're thinking to remove it, really, don't, unless you know what you're doing.

if Rails::VERSION::MAJOR == 2 && RUBY_VERSION >= "2.0.0"
  require "rails_generator"
  require "rails_generator/scripts/generate"

  Rails::Generator::Commands::Create.class_eval do
    def template(relative_source, relative_destination, template_options = {})
      file(relative_source, relative_destination, template_options) do |file|
        # Evaluate any assignments in a temporary, throwaway binding
        vars = template_options[:assigns] || {}
        b = template_options[:binding] || binding

        # this no longer works, eval throws "undefined local variable or method `vars'"
        # vars.each { |k, v| eval "#{k} = vars[:#{k}] || vars['#{k}']", b }
        vars.each { |k, v| b.local_variable_set(:"#{k}", v) }

        # Render the source file with the temporary binding
        ERB.new(file.read, nil, "-").result(b)
      end
    end
  end
end

gem "rspec", "1.3.2"
gem "rspec-rails", "1.3.4"

gem "test-unit", "1.2.3" if RUBY_VERSION.to_f >= 1.9

rspec_gem_dir = nil

Dir["#{Rails.root}/vendor/gems/*"].each do |subdir|
  rspec_gem_dir = subdir if subdir.gsub("#{Rails.root}/vendor/gems/","") =~ /^(\w+-)?rspec-(\d+)/ && File.exist?("#{subdir}/lib/spec/rake/spectask.rb")
end

rspec_plugin_dir = File.expand_path(File.dirname(__FILE__) + "/../../vendor/plugins/rspec")

if rspec_gem_dir && (test ?d, rspec_plugin_dir)
  raise "\n#{'*'*50}\nYou have rspec installed in both vendor/gems and vendor/plugins\nPlease pick one and dispose of the other.\n#{'*'*50}\n\n"
end

if rspec_gem_dir
  $LOAD_PATH.unshift("#{rspec_gem_dir}/lib")
elsif File.exist?(rspec_plugin_dir)
  $LOAD_PATH.unshift("#{rspec_plugin_dir}/lib")
end

# Replace:
when "foo": bar

# with:
when "foo" then bar

# In some cases, you might need to replace:
respond_to?(:foobar)

# with:
respond_to?(:foobar, true)

# Replace:
order: [:day, :month, :year]

# with:
order:
  - :year
  - :month
  - :day

# encoding: utf-8

$KCODE = "UTF-8"