execute

# File lib/rubygems/commands/generate_index_command.rb, line 101
  def execute
    if options[:update] and
       (options[:rss_host] or options[:rss_gems_host]) then
      alert_error '--update not compatible with RSS generation'
      terminate_interaction 1
    end

    if not File.exist?(options[:directory]) or
       not File.directory?(options[:directory]) then
      alert_error "unknown directory name #{directory}."
      terminate_interaction 1
    else
      indexer = Gem::Indexer.new options.delete(:directory), options

      if options[:update] then
        indexer.update_index
      else
        indexer.generate_index
      end
    end
  end