Download github wikis

get-github-wiki.rb

require 'open-uri'
require 'hpricot'

user, project = ARGV # 'tobi', 'liquid'
fail "get-github-wiki <username> <projectname>" unless user and project

uri = "http://wiki.github.com/#{user}/#{project}"
xpath = "div.sidebar/ul[1]//a"
command = %w[wget -t 2 -mkc --no-parent]

(Hpricot(open(uri))/xpath).each do |a|
  cmd = command.dup << a[:href]
  puts cmd
  system(*cmd)
end