anemone_sitemap.rb

require 'rubygems'
require 'anemone'
require 'builder'

sitemap = ""
xml = Builder::XmlMarkup.new(:target => sitemap, :indent=>2)

xml.instruct!
xml.urlset(:xmlns=>'http://www.sitemaps.org/schemas/sitemap/0.9') {
  Anemone.crawl("http://www.example.com/", :discard_page_bodies => true) do |anemone|
    #must be a better solution than this regex
    anemone.skip_links_like /.csv$|.doc$|.docx$|.gif$|.jpg$|.JPG$|.jpeg$|.js$|.mp3$|.mp4$|.mpg$|.mpeg$|.pdf$|.png$|.ppt$|.rss$|.swf$|.txt$|.xls$|.xlst$|.xml$/i
    anemone.on_every_page do |page|
      xml.url {
        xml.loc(page.url)
        xml.lastmod(Time.now.utc.strftime("%Y-%m-%dT%H:%M:%S+00:00"))
        xml.changefreq('weekly')
      }        
    end
  end
}
File.open('sitemap.xml', 'w') do |f|
  f.write sitemap
end