Rakefile

require 'webrick'
require "term/ansicolor"
require "jekyll"

task :default => :tag_cloud

desc 'Generate tags page'
task :tags do
  puts "Generating tags..."
  require 'rubygems'
  require 'jekyll'
  include Jekyll::Filters
  
  options = Jekyll.configuration({})
  site = Jekyll::Site.new(options)
  site.read_posts('')
  
  FileUtils.rm_rf "tags"
  
  site.tags.sort.each do |tag, posts|
    html = ''
    html << <<-HTML
---
layout: default
title: Postings tagged "#{tag}"
---
    <h1 id="#{tag}">Postings tagged "#{tag}"</h1>
    HTML
    
    html << '<ul class="posts">'
    posts.each do |post|
      post_data = post.to_liquid
      html << <<-HTML
        <li><a href="#{post.url}">#{post_data['title']}</a></li>
      HTML
    end
    html << '</ul>'
    FileUtils.mkdir_p("tags/#{tag}");
    File.open("tags/#{tag}/index.html", 'w+') do |file|
      file.puts html
    end
  end
  puts 'Done.'
end

desc 'Generate tags pages'
task :tag_cloud => :tags do
  puts 'Generating tag cloud...'
  require 'rubygems'
  require 'jekyll'
  include Jekyll::Filters

  options = Jekyll.configuration({})
  site = Jekyll::Site.new(options)
  site.read_posts('')

  html = ''
  max_count = site.tags.map{|t,p| p.count}.max
  site.tags.sort.each do |tag, posts|
    s = posts.count
    font_size = ((20 - 10.0*(max_count-s)/max_count)*2).to_i/2.0
    html << "<a href=\"/tags/#{tag.gsub(/ /,"%20")}\" title=\"Postings tagged #{tag}\" style=\"font-size: #{font_size}px; line-height:#{font_size}px\">#{tag}</a> "
  end
  File.open('_includes/tag_cloud.html', 'w+') do |file|
    file.puts html
  end
  puts 'Done.'
end