class Bundler::Source::Rubygems

def install(spec)
  destination = Gem.dir
  Bundler.ui.debug "  * Downloading"
  gem_path  = Gem::RemoteFetcher.fetcher.download(spec, uri, destination)
  Bundler.ui.debug "  * Installing"
  installer = Gem::Installer.new gem_path,
    :install_dir => Gem.dir,
    :ignore_dependencies => true
  installer.install
end