Ruby script in a Windows batch script

gistfile1.rb

@echo off
goto endofruby
#!/bin/ruby
git_repo = "git://github.com/rails/rails.git"

help = %Q{
Rails Info:
    -v, --version                    Show the Rails version number and quit.
    -h, --help                       Show this help message and quit.
 
General Options:
    -p, --pretend                    Run but do not make any changes.
        --force                      Overwrite files that already exist.
    -s, --skip                       Skip files that already exist.
    -q, --quiet                      Suppress normal output.
    -t, --backtrace                  Debugging: show backtrace on errors.
 
Description:
    The 'edge_rails' command creates a new Rails application with a default
    directory structure and configuration at the path you specify, using the
    very latest version of Rails.
 
Example:
    edge_rails ~/Code/Ruby/weblog
 
    This generates a skeletal Rails installation in ~/Code/Ruby/weblog.
    See the README in the newly created application to get going.    
 
}

require 'fileutils'
 
if ARGV.empty?
  puts help
  exit
end
 
dir = ARGV.shift
args = ARGV.join (" ")
 
FileUtils::mkdir(dir)
FileUtils::mkdir("#{dir}/vendor")

puts "Exporting EdgeRails from #{git_repo}"
# system "svn export http://svn.rubyonrails.org/rails/trunk #{dir}/vendor/rails"
system "git clone --depth=1 #{git_repo} #{dir}/vendor/rails"
system "rm -rf #{dir}/vendor/rails/.git*"
 
system "ruby #{dir}/vendor/rails/railties/bin/rails #{dir} #{args}"
__END__
:endofruby
"%~d0%~p0ruby" -x "%~f0" %*