Convert XML to CSV file using Ruby (nokogiri)

xml-to-csv.rb

require 'csv'
require 'nokogiri'

filename = "timeentries"

doc = File.open("#{filename}.xml") { |f| Nokogiri::XML(f) }

entries = doc.css('time-entry')

CSV.open("#{filename}.csv", "wb") do |csv|
  header = entries.first.element_children.map(&:name)

  csv << header

  entries.each do |entry|
    if header != entry.element_children.map(&:name)
      raise "malformed!"
    end
    csv << entry.element_children.map(&:content)
  end
end

puts "Converted #{entries.size} elements."