xml_to_csv.rb

require 'csv'
require 'nokogiri'

xml = File.read('hello.xml')
doc = Nokogiri::XML(xml)

all_the_things = []

doc.xpath('//file').each do |file|
  title          = file.xpath("./title").first.text
  filename       = file.xpath("./name").first.text
  identifier     = file.xpath("./identifier/*[contains(text(), 'My display ID')]").text
  secret         = file.xpath("./identifier/secret").attr('secret').text
  all_the_things << [title, filename, identifier, secret]
end

CSV.open('new_file.csv', 'wb' ) do |row|
  row << ['title', 'filename', 'identifier', 'secret']
  all_the_things.each do |data|
    row << data
  end
end