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require "rubygems"
require "bundler/setup"
require "stringex"
require 'nokogiri'
require 'redcarpet'
require 'open-uri'

INDEX = "http://localhost:4000/"
PDF_OUTPUT = "pdf/"
WKHTMLTOPDF_OPTIONS = '-s A4'
WKHTMLTOPDF_UNSUPPORTED_OPTIONS = '--footer-right [page] --footer-font-name "PT Sans" --footer-font-size 10 --print-media-type'

namespace "print" do
  def get_link_nodes
    doc = Nokogiri::HTML(open(INDEX))
    doc.css("a").select do |link|
      link['href'].match /^([^\/][^http].+)/
    end
  end
  
  def page_count
    # pages = `pdftk blow_up_your_views_lsrc.pdf dump_data output | grep -i Num`
    
  end

  def generate_pdf(node, prefix = nil)
    filename = PDF_OUTPUT + prefix.to_s + node['href'].gsub("/","_").gsub(".html", ".pdf")
    command = "wkhtmltopdf #{WKHTMLTOPDF_OPTIONS} #{INDEX + node['href']} #{filename}"
    puts command
    system command
    return filename
  end
  
  def make_output_directory
    Dir.mkdir(PDF_OUTPUT) unless File.exist?(PDF_OUTPUT)
  end
  
  desc "Get Links"
  task :links do
    puts get_link_nodes.join("\n")
  end
  
  desc "Prepare for Output"
  task :prepare_for_output do
    make_output_directory
  end
  
  desc "Generate a Sample PDF"
  task :pdf => :prepare_for_output do
    output_filename = generate_pdf(get_link_nodes.first)
    system "open #{output_filename}"
  end
  
  desc "Generate all PDFs"
  task :pdfs => :prepare_for_output do
    get_link_nodes.each_with_index do |node, index|
      prefix = index.to_s.rjust(2, "0") + "_"
      generate_pdf(node, prefix)
    end
  end
end

FILE_SEARCH_PATTERN = "source/**/*.{markdown, textile}"
MARKERS = {"todo" => :red, "outline" => :yellow, "pending" => :yellow, "edit" => :yellow, "review" => :green, "wip" => :red}
COLORIZE = true

namespace "tags" do
  MARKERS.keys.each do |marker|
    desc "Pull out #{marker.upcase} lines"
    task marker do
      count = print_lines_containing(marker)
      puts "#{count} #{marker.upcase} tags remain\n\n"
    end
  end
  
  desc "Pull out all marked lines"
  task :all do
    print_lines_containing(MARKERS.keys)
  end
  
  class String
    def red; colorize(self, "\e[1m\e[31m"); end
    def yellow; colorize(self, "\e[1m\e[33m"); end
    def green; colorize(self, "\e[1m\e[32m"); end
    def underline; colorize(self, "\e[1m\e[4m"); end
    def colorize(text, color_code)
      COLORIZE ? "#{color_code}#{text}\e[0m" : text
    end
  end
end

desc "Ship It"
task :ship do
  `git push origin master`
  `git push heroku master`
end

def print_lines_containing(*keywords)
  counter = 0
  Dir.glob(FILE_SEARCH_PATTERN) do |filename|
    filename_printed = false
    File.open(filename).lines.each do |line|
      if line.downcase.match(/.*[^\`]?\[(#{keywords.join("|")})+.*\].*/)
        unless filename_printed
          puts "\n" + filename.underline
          filename_printed = true
        end
        counter += 1
        puts line.chomp.send(MARKERS[$1.downcase])
      end
    end
  end
  puts ""
  return counter
end

## -- Rsync Deploy config -- ##
# Be sure your public key is listed in your server's ~/.ssh/authorized_keys file
ssh_user = "user@domain.com"
document_root = "~/website.com/"
deploy_default = "rsync"

# This will be configured for you when you run config_deploy
deploy_branch = "gh-pages"

## -- Misc Configs -- ##

public_dir = "public" # compiled site directory
source_dir = "source" # source file directory
blog_index_dir = 'source' # directory for your blog's index page (if you put your index in source/blog/index.html, set this to 'source/blog')
deploy_dir = "_deploy" # deploy directory (for Github pages deployment)
stash_dir = "_stash" # directory to stash posts for speedy generation
posts_dir = "_posts" # directory for blog files
themes_dir = ".themes" # directory for blog files
new_post_ext = "markdown" # default new post file extension when using the new_post task
new_page_ext = "markdown" # default new page file extension when using the new_page task
server_port = "4000" # port for preview server eg. localhost:4000


desc "Initial setup for Octopress: copies the default theme into the path of Jekyll's generator. Rake install defaults to rake install[classic] to install a different theme run rake install[some_theme_name]"
task :install, :theme do |t, args|
  if File.directory?(source_dir) || File.directory?("sass")
    abort("rake aborted!") if ask("A theme is already installed, proceeding will overwrite existing files. Are you sure?", ['y', 'n']) == 'n'
  end
  # copy theme into working Jekyll directories
  theme = args.theme || 'classic'
  puts "## Copying "+theme+" theme into ./#{source_dir} and ./sass"
  mkdir_p source_dir
  cp_r "#{themes_dir}/#{theme}/source/.", source_dir
  mkdir_p "sass"
  cp_r "#{themes_dir}/#{theme}/sass/.", "sass"
  mkdir_p "#{source_dir}/#{posts_dir}"
  mkdir_p public_dir
end

#######################
# Working with Jekyll #
#######################

def markdown(text)
  options = [:hard_wrap, :filter_html, :autolink, :no_intraemphasis, :fenced_code, :gh_blockcode]
  #syntax_highlighter(Redcarpet.new(text, *options).to_html).html_safe
  Redcarpet.new(text, *options).to_html
end

def syntax_highlighter(html)
  doc = Nokogiri::HTML(html)
  doc.search("//pre[@lang]").each do |pre|
    pre.replace Albino.colorize(pre.text.rstrip, pre[:lang])
  end
  doc.to_s
end

desc "Preprocessor Hacks"
task :preprocess do
  puts "## Pre-processing Source Files"
  Dir.glob(FILE_SEARCH_PATTERN) do |filename|
    original = File.read(filename)
    if original.include?("<div class=")
      puts "Found candidate in #{filename}"
      #File.open(filename).each do |line|
      #supported_classnames = %w(opinion note)
      #end
    end
    # doc = Nokogiri::HTML.parse(File.read(filename))
    # puts doc.to_yaml
    # doc.search('div.note, div.opinion').each do |node|
    # original = node.inner_html
    # md = markdown(node.inner_html)
    # node.inner_html = md
    # puts "Found in #{filename}:"
    # puts "Original: #{original}"
    # puts "Markdown: #{md}"
    # puts "Processed: #{node.inner_html}"
    # puts
    # end
    #doc.to_html
  end
  # Write the file
end

desc "Generate jekyll site"
task :generate do
  raise "### You haven't set anything up yet. First run `rake install` to set up an Octopress theme." unless File.directory?(source_dir)
  puts "## Generating Site with Jekyll"
  system "jekyll"
end

desc "Watch the site and regenerate when it changes"
task :watch do
  raise "### You haven't set anything up yet. First run `rake install` to set up an Octopress theme." unless File.directory?(source_dir)
  puts "Starting to watch source with Jekyll and Compass."
  jekyllPid = Process.spawn("jekyll --auto")
  compassPid = Process.spawn("compass watch")

  trap("INT") {
    [jekyllPid, compassPid].each { |pid| Process.kill(9, pid) rescue Errno::ESRCH }
    exit 0
  }

  [jekyllPid, compassPid].each { |pid| Process.wait(pid) }
end

desc "preview the site in a web browser"
task :preview do
  raise "### You haven't set anything up yet. First run `rake install` to set up an Octopress theme." unless File.directory?(source_dir)
  puts "Starting to watch source with Jekyll and Compass. Starting Rack on port #{server_port}"
  jekyllPid = Process.spawn("jekyll --auto")
  compassPid = Process.spawn("compass watch")
  rackupPid = Process.spawn("rackup --port #{server_port}")

  trap("INT") {
    [jekyllPid, compassPid, rackupPid].each { |pid| Process.kill(9, pid) rescue Errno::ESRCH }
    exit 0
  }

  [jekyllPid, compassPid, rackupPid].each { |pid| Process.wait(pid) }
end

# usage rake new_post[my-new-post] or rake new_post['my new post'] or rake new_post (defaults to "new-post")
desc "Begin a new post in #{source_dir}/#{posts_dir}"
task :new_post, :title do |t, args|
  raise "### You haven't set anything up yet. First run `rake install` to set up an Octopress theme." unless File.directory?(source_dir)
  require './plugins/titlecase.rb'
  mkdir_p "#{source_dir}/#{posts_dir}"
  args.with_defaults(:title => 'new-post')
  title = args.title
  filename = "#{source_dir}/#{posts_dir}/#{Time.now.strftime('%Y-%m-%d')}-#{title.to_url}.#{new_post_ext}"
  if File.exist?(filename)
    abort("rake aborted!") if ask("#{filename} already exists. Do you want to overwrite?", ['y', 'n']) == 'n'
  end
  puts "Creating new post: #{filename}"
  open(filename, 'w') do |post|
    system "mkdir -p #{source_dir}/#{posts_dir}/";
    post.puts "---"
    post.puts "layout: post"
    post.puts "title: \"#{title.gsub(/&/,'&amp;').titlecase}\""
    post.puts "date: #{Time.now.strftime('%Y-%m-%d %H:%M')}"
    post.puts "comments: true"
    post.puts "categories: "
    post.puts "---"
  end
end

# usage rake new_page[my-new-page] or rake new_page[my-new-page.html] or rake new_page (defaults to "new-page.markdown")
desc "Create a new page in #{source_dir}/(filename)/index.#{new_page_ext}"
task :new_page, :filename do |t, args|
  raise "### You haven't set anything up yet. First run `rake install` to set up an Octopress theme." unless File.directory?(source_dir)
  require './plugins/titlecase.rb'
  args.with_defaults(:filename => 'new-page')
  page_dir = source_dir
  if args.filename =~ /(^.+\/)?([\w_-]+)(\.)?(.+)?/
    page_dir += $4 ? "/#{$1}" : "/#{$1}#{$2}/"
    name = $4 ? $2 : "index"
    extension = $4 || "#{new_page_ext}"
    filename = "#{name}.#{extension}"
    mkdir_p page_dir
    file = page_dir + filename
    if File.exist?(file)
      abort("rake aborted!") if ask("#{file} already exists. Do you want to overwrite?", ['y', 'n']) == 'n'
    end
    puts "Creating new page: #{file}"
    open(file, 'w') do |page|
      page.puts "---"
      page.puts "layout: page"
      page.puts "title: \"#{$2.gsub(/[-_]/, ' ').titlecase}\""
      page.puts "date: #{Time.now.strftime('%Y-%m-%d %H:%M')}"
      page.puts "comments: true"
      page.puts "sharing: true"
      page.puts "footer: true"
      page.puts "---"
    end
  else
    puts "Syntax error: #{args.filename} contains unsupported characters"
  end
end

# usage rake isolate[my-post]
desc "Move all other posts than the one currently being worked on to a temporary stash location (stash) so regenerating the site happens much quicker."
task :isolate, :filename do |t, args|
  stash_dir = "#{source_dir}/#{stash_dir}"
  FileUtils.mkdir(stash_dir) unless File.exist?(stash_dir)
  Dir.glob("#{source_dir}/#{posts_dir}/*.*") do |post|
    FileUtils.mv post, stash_dir unless post.include?(args.filename)
  end
end

desc "Move all stashed posts back into the posts directory, ready for site generation."
task :integrate do
  FileUtils.mv Dir.glob("#{source_dir}/#{stash_dir}/*.*"), "#{source_dir}/#{posts_dir}/"
end

desc "Clean out caches: .pygments-cache, .gist-cache, .sass-cache"
task :clean do
  rm_rf [".pygments-cache/**", ".gist-cache/**", ".sass-cache/**", "source/stylesheets/screen.css"]
end

desc "Move sass to sass.old, install sass theme updates, replace sass/custom with sass.old/custom"
task :update_style, :theme do |t, args|
  theme = args.theme || 'classic'
  if File.directory?("sass.old")
    puts "removed existing sass.old directory"
    rm_r "sass.old", :secure=>true
  end
  mv "sass", "sass.old"
  puts "## Moved styles into sass.old/"
  cp_r "#{themes_dir}/"+theme+"/sass/", "sass"
  cp_r "sass.old/custom/.", "sass/custom"
  puts "## Updated Sass ##"
end

desc "Move source to source.old, install source theme updates, replace source/_includes/navigation.html with source.old's navigation"
task :update_source, :theme do |t, args|
  theme = args.theme || 'classic'
  if File.directory?("#{source_dir}.old")
    puts "## Removed existing #{source_dir}.old directory"
    rm_r "#{source_dir}.old", :secure=>true
  end
  cp_r "#{source_dir}/.", "#{source_dir}.old"
  puts "## Copied #{source_dir} into #{source_dir}.old/"
  cp_r "#{themes_dir}/"+theme+"/source/.", source_dir, :remove_destination=>true
  cp_r "#{source_dir}.old/_includes/custom/.", "#{source_dir}/_includes/custom/", :remove_destination=>true
  mv "#{source_dir}/index.html", "#{blog_index_dir}", :force=>true if blog_index_dir != source_dir
  cp "#{source_dir}.old/index.html", source_dir if blog_index_dir != source_dir
  puts "## Updated #{source_dir} ##"
end

##############
# Deploying #
##############

desc "Default deploy task"
task :deploy do
  Rake::Task[:copydot].invoke(source_dir, public_dir)
  Rake::Task["#{deploy_default}"].execute
end

desc "Generate website and deploy"
task :gen_deploy => [:integrate, :generate, :deploy] do
end

desc "copy dot files for deployment"
task :copydot, :source, :dest do |t, args|
  exclusions = [".", "..", ".DS_Store"]
  Dir["#{args.source}/**/.*"].each do |file|
    if !File.directory?(file) && !exclusions.include?(File.basename(file))
      cp(file, file.gsub(/#{args.source}/, "#{args.dest}"));
    end
  end
end

desc "Deploy website via rsync"
task :rsync do
  puts "## Deploying website via Rsync"
  ok_failed system("rsync -avz --delete #{public_dir}/ #{ssh_user}:#{document_root}")
end

desc "deploy public directory to github pages"
multitask :push do
  puts "## Deploying branch to Github Pages "
  (Dir["#{deploy_dir}/*"]).each { |f| rm_rf(f) }
  Rake::Task[:copydot].invoke(public_dir, deploy_dir)
  puts "\n## copying #{public_dir} to #{deploy_dir}"
  system "cp -R #{public_dir}/* #{deploy_dir}"
  cd "#{deploy_dir}" do
    system "git add ."
    system "git add -u"
    puts "\n## Commiting: Site updated at #{Time.now.utc}"
    message = "Site updated at #{Time.now.utc}"
    system "git commit -m \"#{message}\""
    puts "\n## Pushing generated #{deploy_dir} website"
    system "git push origin #{deploy_branch}"
    puts "\n## Github Pages deploy complete"
  end
end

desc "Update configurations to support publishing to root or sub directory"
task :set_root_dir, :dir do |t, args|
  puts ">>> !! Please provide a directory, eg. rake config_dir[publishing/subdirectory]" unless args.dir
  if args.dir
    if args.dir == "/"
      dir = ""
    else
      dir = "/" + args.dir.sub(/(\/*)(.+)/, "\\2").sub(/\/$/, '');
    end
    rakefile = IO.read(__FILE__)
    rakefile.sub!(/public_dir(\s*)=(\s*)(["'])[\w\-\/]*["']/, "public_dir\\1=\\2\\3public#{dir}\\3")
    File.open(__FILE__, 'w') do |f|
      f.write rakefile
    end
    compass_config = IO.read('config.rb')
    compass_config.sub!(/http_path(\s*)=(\s*)(["'])[\w\-\/]*["']/, "http_path\\1=\\2\\3#{dir}/\\3")
    compass_config.sub!(/http_images_path(\s*)=(\s*)(["'])[\w\-\/]*["']/, "http_images_path\\1=\\2\\3#{dir}/images\\3")
    compass_config.sub!(/http_fonts_path(\s*)=(\s*)(["'])[\w\-\/]*["']/, "http_fonts_path\\1=\\2\\3#{dir}/fonts\\3")
    compass_config.sub!(/css_dir(\s*)=(\s*)(["'])[\w\-\/]*["']/, "css_dir\\1=\\2\\3public#{dir}/stylesheets\\3")
    File.open('config.rb', 'w') do |f|
      f.write compass_config
    end
    jekyll_config = IO.read('_config.yml')
    jekyll_config.sub!(/^destination:.+$/, "destination: public#{dir}")
    jekyll_config.sub!(/^subscribe_rss:\s*\/.+$/, "subscribe_rss: #{dir}/atom.xml")
    jekyll_config.sub!(/^root:.*$/, "root: /#{dir.sub(/^\//, '')}")
    File.open('_config.yml', 'w') do |f|
      f.write jekyll_config
    end
    rm_rf public_dir
    mkdir_p "#{public_dir}#{dir}"
    puts "## Site's root directory is now '/#{dir.sub(/^\//, '')}' ##"
  end
end

desc "Set up _deploy folder and deploy branch for Github Pages deployment"
task :setup_github_pages do
  repo_url = get_stdin("Enter the read/write url for your repository: ")
  user = repo_url.match(/:([^\/]+)/)[1]
  branch = (repo_url.match(/\/\w+.github.com/).nil?) ? 'gh-pages' : 'master'
  project = (branch == 'gh-pages') ? repo_url.match(/\/([^\.]+)/)[1] : ''
  unless `git remote -v`.match(/origin.+?octopress.git/).nil?
    # If octopress is still the origin remote (from cloning) rename it to octopress
    system "git remote rename origin octopress"
    if branch == 'master'
      # If this is a user/organization pages repository, add the correct origin remote
      # and checkout the source branch for committing changes to the blog source.
      system "git remote add origin #{repo_url}"
      puts "Added remote #{repo_url} as origin"
      system "git config branch.master.remote origin"
      puts "Set origin as default remote"
      system "git branch -m master source"
      puts "Master branch renamed to 'source' for committing your blog source files"
    else
      unless !public_dir.match("#{project}").nil?
        system "rake set_root_dir[#{project}]"
      end
    end
  end
  url = "http://#{user}.github.com"
  url += "/#{project}" unless project == ''
  jekyll_config = IO.read('_config.yml')
  jekyll_config.sub!(/^url:.*$/, "url: #{url}")
  File.open('_config.yml', 'w') do |f|
    f.write jekyll_config
  end
  rm_rf deploy_dir
  mkdir deploy_dir
  cd "#{deploy_dir}" do
    system "git init"
    system "echo 'My Octopress Page is coming soon &hellip;' > index.html"
    system "git add ."
    system "git commit -m \"Octopress init\""
    system "git branch -m gh-pages" unless branch == 'master'
    system "git remote add origin #{repo_url}"
    rakefile = IO.read(__FILE__)
    rakefile.sub!(/deploy_branch(\s*)=(\s*)(["'])[\w-]*["']/, "deploy_branch\\1=\\2\\3#{branch}\\3")
    rakefile.sub!(/deploy_default(\s*)=(\s*)(["'])[\w-]*["']/, "deploy_default\\1=\\2\\3push\\3")
    File.open(__FILE__, 'w') do |f|
      f.write rakefile
    end
  end
  puts "\n---\n## Now you can deploy to #{url} with `rake deploy` ##"
end

def ok_failed(condition)
  if (condition)
    puts "OK"
  else
    puts "FAILED"
  end
end

def get_stdin(message)
  print message
  STDIN.gets.chomp
end

def ask(message, valid_options)
  if valid_options
    answer = get_stdin("#{message} #{valid_options.to_s.gsub(/"/, '').gsub(/, /,'/')} ") while !valid_options.include?(answer)
  else
    answer = get_stdin(message)
  end
  answer
end

desc "list tasks"
task :list do
  puts "Tasks: #{(Rake::Task.tasks - [Rake::Task[:list]]).join(', ')}"
  puts "(type rake -T for more detail)\n\n"
end
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