Rakefile

desc 'Generate tags pages'
task :tags do
  puts "Generating tags..."
  require 'rubygems'
  require 'jekyll'
  include Jekyll::Filters
  
  options = Jekyll.configuration({})
  site = Jekyll::Site.new(options)
  site.read_posts('')
  
  # Remove tags directory before regenerating
  FileUtils.rm_rf("tags")

  site.tags.each do |tag, posts|
    puts "tag: #{tag}"
    html = <<-HTML
---
layout: default
title: "tagged: #{tag}"
syntax-highlighting: yes
---
  <div id="archive">
    <h1 class="title">Archive for <span class="archive-title">#{tag}</span></h1>
    <div id="items">
      {% for post in site.posts %}
		    {% for tag in post.tags %}
			    {%if tag == "#{tag}" %}
				    {%include post.html%}
			    {%endif%}
		    {%endfor%}
      {% endfor %}
    </div>
  </div>
HTML

    FileUtils.mkdir_p("tags/#{tag}")
    File.open("tags/#{tag}/index.html", 'w+') do |file|
      file.puts html
    end
  end
  puts 'Done.'
end