windows_stub_script

# File lib/rubygems/installer.rb, line 790
  def windows_stub_script(bindir, bin_file_name)
    rb_config = RbConfig::CONFIG
    rb_topdir = RbConfig::TOPDIR || File.dirname(rb_config["bindir"])

    # get ruby executable file name from RbConfig
    ruby_exe = "#{rb_config['RUBY_INSTALL_NAME']}#{rb_config['EXEEXT']}"
    ruby_exe = "ruby.exe" if ruby_exe.empty?

    if File.exist?(File.join bindir, ruby_exe)
      # stub & ruby.exe withing same folder.  Portable
      @ECHO OFF@"%~dp0ruby.exe" "%~dpn0" %*
    elsif bindir.downcase.start_with? rb_topdir.downcase
      # stub within ruby folder, but not standard bin.  Portable
      require 'pathname'
      from = Pathname.new bindir
      to   = Pathname.new "#{rb_topdir}/bin"
      rel  = to.relative_path_from from
      @ECHO OFF@"%~dp0#{rel}/ruby.exe" "%~dpn0" %*
    else
      # outside ruby folder, maybe -user-install or bundler.  Portable, but ruby
      # is dependent on PATH
      @ECHO [email protected] "%~dpn0" %*
    end
  end