regex.rb

directory = Dir.entries('.')
output_file = "links.txt"
links = []

directory.each { |filename|
  if File.directory?(filename)
    next
  else
    source = File.open(filename).readlines

    source.each { |line|
      matches = line.match(/http.*?\.torrent/)
      links.push matches if (matches != false && matches != nil)
    }
  end
}

f = File.open(output_file, 'r+')
f.puts links
f.close