twilog.rb

require 'active_support/time'

unless ARGV[0]
  puts 'usage: ruby twilog.rb SCREEN_NAME YEAR'
  exit(1)
end

screen_name = ARGV[0]
year        = ARGV[1] || Date.today.year

`mkdir -p twilog/#{screen_name}`

date = Date.new(year)
Date::DATE_FORMATS[:twilog] = "%y%m%d"
365.times do |i|
  format = date.since(i.days).to_date.to_s(:twilog)
  `curl -o twilog/#{screen_name}/#{format}.html http://twilog.org/#{screen_name}/date-#{format}`
  sleep 1
end