gistfile1.rb

require "datamapper"
require "mechanize"
require "uri"
DataMapper.setup(:default, "sqlite:///テキトウなディレクトリとファイル名(DataMapper のドキュメント読め)")

class Torrent
  include DataMapper::Resource
  property :url, Text, :key => true
  property :title, Text
end

#Torrent.auto_migrate!

def jibiki
  ulrs = ["http://sukebei.nyaatorrents.org/?page=torrents&catid=7&subcat=26"]
  ulrs.each{|u|
    page = agent.get URI.parse u
    page.root.xpath("//tr[@class='tlistrow']").to_ary.each do |a|
      url = a.children[3].children.first.attributes.to_hash["href"].to_s
      title = a.children[1].children.first.attributes.to_hash["title"].to_s
      unless Torrent.get(url)
        begin
          system "transmissioncli '#{url}' -p ポート -w 'ダウンロードディレクトリ'"
          puts "save #{title}:#{url}"
          t = Torrent.new
          t.url = url
          t.title = title
          t.save
        rescue
        end
      end
    end
  }
end

def agent
  Mechanize.new
end

while true
  jibiki
  sleep 300
end

gistfile2.txt