# File lib/bundler/fetcher/dependency.rb, line 21
      def specs(gem_names, full_dependency_list = [], last_spec_list = [])
        query_list = gem_names - full_dependency_list

        # only display the message on the first run
        if Bundler.ui.debug?
          Bundler.ui.debug "Query List: #{query_list.inspect}"
        else
          Bundler.ui.info ".", false
        end

        return { remote_uri => last_spec_list } if query_list.empty?

        remote_specs = Bundler::Retry.new("dependency api", AUTH_ERRORS).attempts do
          dependency_specs(query_list)
        end

        spec_list, deps_list = remote_specs
        returned_gems = spec_list.map(&:first).uniq
        specs(deps_list, full_dependency_list + returned_gems, spec_list + last_spec_list)
      rescue HTTPError, MarshalError, GemspecError
        Bundler.ui.info "" unless Bundler.ui.debug? # new line now that the dots are over
        Bundler.ui.debug "could not fetch from the dependency API, trying the full index"
        return nil
      end