class Thor

def self.install_task(spec)
  package_task spec
  null, sudo, gem = RUBY_PLATFORM =~ /w(in)?32$/ ? ['NUL', '', 'gem.bat'] :
                                                   ['/dev/null', 'sudo', 'gem']
  
  desc "install", "install the gem"
  define_method :install do
    old_stderr, $stderr = $stderr.dup, File.open(null, "w")
    package
    $stderr = old_stderr
    system %{#{sudo} #{gem} install pkg/#{spec.name}-#{spec.version} --no-rdoc --no-ri --no-update-sources}
  end
end