class Bundler::Source::Rubygems

def remote_specs
  @remote_specs ||= begin
    old = Bundler.rubygems.sources
    idx = Index.new
    fetchers       = remotes.map { |uri| Bundler::Fetcher.new(uri) }
    api_fetchers   = fetchers.select { |f| f.use_api }
    index_fetchers = fetchers - api_fetchers
    # gather lists from non-api sites
    index_fetchers.each do |f|
      Bundler.ui.info "Fetching source index from #{f.uri}"
      idx.use f.specs(nil, self)
    end
    return idx if api_fetchers.empty?
    # because ensuring we have all the gems we need involves downloading
    # the gemspecs of those gems, if the non-api sites contain more than
    # about 100 gems, we just treat all sites as non-api for speed.
    allow_api = idx.size < API_REQUEST_LIMIT && dependency_names.size < API_REQUEST_LIMIT
    if allow_api
      api_fetchers.each do |f|
        Bundler.ui.info "Fetching gem metadata from #{f.uri}", Bundler.ui.debug?
        idx.use f.specs(dependency_names, self)
        Bundler.ui.info "" if !Bundler.ui.debug? # new line now that the dots are over
      end
      if api_fetchers.all?{|f| f.use_api }
        # it's possible that gems from one source depend on gems from some
        # other source, so now we download gemspecs and iterate over those
        # dependencies, looking for gems we don't have info on yet.
        unmet = idx.unmet_dependency_names
        # if there are any cross-site gems we missed, get them now
        api_fetchers.each do |f|
          Bundler.ui.info "Fetching additional metadata from #{f.uri}", Bundler.ui.debug?
          idx.use f.specs(unmet, self)
          Bundler.ui.info "" if !Bundler.ui.debug? # new line now that the dots are over
        end if unmet.any?
      else
        allow_api = false
      end
    end
    if !allow_api
      api_fetchers.each do |f|
        Bundler.ui.info "Fetching source index from #{f.uri}"
        idx.use f.specs(nil, self)
      end
    end
    return idx
  ensure
    Bundler.rubygems.sources = old
  end
end