Merge pull request #1589 from imathis/jekyll-2

Jekyll 2.0 compatability

11 files changed, 94 insertions, 715 deletions

diff --git a/.themes/classic/source/index.html b/.themes/classic/source/index.html
index a114e5a8..64b665e4 100644
--- a/.themes/classic/source/index.html
+++ b/.themes/classic/source/index.html
@@ -12,11 +12,11 @@ layout: default
   {% endfor %}
   <div class="pagination">
     {% if paginator.next_page %}
-      <a class="prev" href="{{paginator.next_page}}">&larr; Older</a>
+      <a class="prev" href="{{paginator.next_page_path}}">&larr; Older</a>
     {% endif %}
     <a href="/blog/archives">Blog Archives</a>
     {% if paginator.previous_page %}
-    <a class="next" href="{{paginator.previous_page}}">Newer &rarr;</a>
+    <a class="next" href="{{paginator.previous_page_path}}">Newer &rarr;</a>
     {% endif %}
   </div>
 </div>
diff --git a/Gemfile b/Gemfile
index cd8ce578..9557d593 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,20 +1,19 @@
 source "https://rubygems.org"
 
 group :development do
-  gem 'rake', '~> 0.9'
-  gem 'jekyll', '~> 0.12'
-  gem 'rdiscount', '~> 2.0.7'
-  gem 'pygments.rb', '~> 0.3.4'
+  gem 'rake', '~> 10.0'
+  gem 'jekyll', '~> 2.0'
+  gem 'jekyll-page-hooks', '~> 1.2'
+  gem 'jekyll-date-format', '~> 1.0'
+  gem 'jekyll-sitemap'
+  gem 'rdiscount', '~> 2.0'
   gem 'RedCloth', '~> 4.2.9'
-  gem 'haml', '~> 3.1.7'
+  gem 'haml', '~> 4.0'
   gem 'compass', '~> 0.12.2'
-  gem 'sass', '~> 3.2'
   gem 'sass-globbing', '~> 1.0.0'
   gem 'rubypants', '~> 0.2.0'
   gem 'rb-fsevent', '~> 0.9'
   gem 'stringex', '~> 1.4.0'
-  gem 'liquid', '~> 2.3.0'
-  gem 'directory_watcher', '1.4.1'
 end
 
 gem 'sinatra', '~> 1.4.2'
diff --git a/Gemfile.lock b/Gemfile.lock
index 182c30bc..55a3c463 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,49 +2,86 @@ GEM
   remote: https://rubygems.org/
   specs:
     RedCloth (4.2.9)
-    chunky_png (1.2.5)
-    classifier (1.3.3)
+    blankslate (2.1.2.4)
+    celluloid (0.15.2)
+      timers (~> 1.1.0)
+    chunky_png (1.3.1)
+    classifier (1.3.4)
       fast-stemmer (>= 1.0.0)
-    compass (0.12.2)
+    coffee-script (2.2.0)
+      coffee-script-source
+      execjs
+    coffee-script-source (1.7.0)
+    colorator (0.1)
+    compass (0.12.6)
       chunky_png (~> 1.2)
       fssm (>= 0.2.7)
-      sass (~> 3.1)
-    directory_watcher (1.4.1)
-    fast-stemmer (1.0.1)
-    fssm (0.2.9)
-    haml (3.1.7)
-    jekyll (0.12.0)
+      sass (~> 3.2.19)
+    execjs (2.2.0)
+    fast-stemmer (1.0.2)
+    ffi (1.9.3)
+    fssm (0.2.10)
+    haml (4.0.5)
+      tilt
+    jekyll (2.0.3)
       classifier (~> 1.3)
-      directory_watcher (~> 1.1)
-      kramdown (~> 0.13.4)
-      liquid (~> 2.3)
-      maruku (~> 0.5)
-      pygments.rb (~> 0.3.2)
-    kramdown (0.13.8)
-    liquid (2.3.0)
-    maruku (0.6.1)
-      syntax (>= 1.0.0)
-    posix-spawn (0.3.6)
-    pygments.rb (0.3.4)
+      colorator (~> 0.1)
+      jekyll-coffeescript (~> 1.0)
+      jekyll-sass-converter (~> 1.0)
+      kramdown (~> 1.3)
+      liquid (~> 2.5.5)
+      listen (~> 2.5)
+      mercenary (~> 0.3.3)
+      pygments.rb (~> 0.5.0)
+      redcarpet (~> 3.1)
+      safe_yaml (~> 1.0)
+      toml (~> 0.1.0)
+    jekyll-coffeescript (1.0.0)
+      coffee-script (~> 2.2)
+    jekyll-date-format (1.0.0)
+      jekyll (>= 1.0.0)
+    jekyll-page-hooks (1.2.0)
+      jekyll (>= 2.0.0)
+    jekyll-sass-converter (1.0.0)
+      sass (~> 3.2)
+    jekyll-sitemap (0.4.1)
+      jekyll (~> 2.0)
+    kramdown (1.4.0)
+    liquid (2.5.5)
+    listen (2.7.9)
+      celluloid (>= 0.15.2)
+      rb-fsevent (>= 0.9.3)
+      rb-inotify (>= 0.9)
+    mercenary (0.3.3)
+    parslet (1.5.0)
+      blankslate (~> 2.0)
+    posix-spawn (0.3.8)
+    pygments.rb (0.5.4)
       posix-spawn (~> 0.3.6)
       yajl-ruby (~> 1.1.0)
     rack (1.5.2)
-    rack-protection (1.5.0)
+    rack-protection (1.5.3)
       rack
-    rake (0.9.2.2)
-    rb-fsevent (0.9.1)
+    rake (10.3.2)
+    rb-fsevent (0.9.4)
+    rb-inotify (0.9.5)
+      ffi (>= 0.5.0)
     rdiscount (2.0.7.3)
+    redcarpet (3.1.2)
     rubypants (0.2.0)
-    sass (3.2.9)
+    safe_yaml (1.0.3)
+    sass (3.2.19)
     sass-globbing (1.0.0)
       sass (>= 3.1)
-    sinatra (1.4.2)
-      rack (~> 1.5, >= 1.5.2)
+    sinatra (1.4.5)
+      rack (~> 1.4)
       rack-protection (~> 1.4)
       tilt (~> 1.3, >= 1.3.4)
     stringex (1.4.0)
-    syntax (1.0.0)
-    tilt (1.3.7)
+    tilt (1.4.1)
+    timers (1.1.0)
+    toml (0.1.1)
+      parslet (~> 1.5.0)
     yajl-ruby (1.1.0)
 
 PLATFORMS
@@ -53,16 +90,15 @@ PLATFORMS
 DEPENDENCIES
   RedCloth (~> 4.2.9)
   compass (~> 0.12.2)
-  directory_watcher (= 1.4.1)
-  haml (~> 3.1.7)
-  jekyll (~> 0.12)
-  liquid (~> 2.3.0)
-  pygments.rb (~> 0.3.4)
-  rake (~> 0.9)
+  haml (~> 4.0)
+  jekyll (~> 2.0)
+  jekyll-date-format (~> 1.0)
+  jekyll-page-hooks (~> 1.2)
+  jekyll-sitemap
+  rake (~> 10.0)
   rb-fsevent (~> 0.9)
-  rdiscount (~> 2.0.7)
+  rdiscount (~> 2.0)
   rubypants (~> 0.2.0)
-  sass (~> 3.2)
   sass-globbing (~> 1.0.0)
   sinatra (~> 1.4.2)
   stringex (~> 1.4.0)
diff --git a/Rakefile b/Rakefile
index 71fb44ea..7c15332e 100644
--- a/Rakefile
+++ b/Rakefile
@@ -57,7 +57,7 @@ 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 "compass compile --css-dir #{source_dir}/stylesheets"
-  system "jekyll"
+  system "jekyll build"
 end
 
 desc "Watch the site and regenerate when it changes"
@@ -65,7 +65,7 @@ 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."
   system "compass compile --css-dir #{source_dir}/stylesheets" unless File.exist?("#{source_dir}/stylesheets/screen.css")
-  jekyllPid = Process.spawn({"OCTOPRESS_ENV"=>"preview"}, "jekyll --auto")
+  jekyllPid = Process.spawn({"OCTOPRESS_ENV"=>"preview"}, "jekyll build --watch")
   compassPid = Process.spawn("compass watch")
 
   trap("INT") {
@@ -81,7 +81,7 @@ 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}"
   system "compass compile --css-dir #{source_dir}/stylesheets" unless File.exist?("#{source_dir}/stylesheets/screen.css")
-  jekyllPid = Process.spawn({"OCTOPRESS_ENV"=>"preview"}, "jekyll --auto")
+  jekyllPid = Process.spawn({"OCTOPRESS_ENV"=>"preview"}, "jekyll build --watch")
   compassPid = Process.spawn("compass watch")
   rackupPid = Process.spawn("rackup --port #{server_port}")
 
diff --git a/_config.yml b/_config.yml
index e51e7c38..2a7a8a7e 100644
--- a/_config.yml
+++ b/_config.yml
@@ -39,10 +39,10 @@ rdiscount:
     - autolink
     - footnotes
     - smart
-pygments: false # default python pygments have been replaced by pygments.rb
+highlighter: pygments # default python pygments have been replaced by pygments.rb
 
 paginate: 10          # Posts per page on the blog index
-pagination_dir: blog  # Directory base for pagination URLs eg. /blog/page/2/
+paginate_path: "posts/:num"  # Directory base for pagination URLs eg. /blog/page/2/
 recent_posts: 5       # Posts in the sidebar Recent Posts section
 excerpt_link: "Read on &rarr;"  # "Continue reading" link text at the bottom of excerpted articles
 
diff --git a/plugins/date.rb b/plugins/date.rb
index 01d94737..031e6736 100644
--- a/plugins/date.rb
+++ b/plugins/date.rb
@@ -63,8 +63,8 @@ module Jekyll
     # Convert this Convertible's data to a Hash suitable for use by Liquid.
     # Overrides the default return data and adds any date-specific liquid attributes
     alias :super_to_liquid :to_liquid
-    def to_liquid
-      super_to_liquid.deep_merge(liquid_date_attributes)
+    def to_liquid(attrs = nil)
+      Utils.deep_merge_hashes super_to_liquid(attrs), liquid_date_attributes
     end
   end
 
@@ -74,8 +74,8 @@ module Jekyll
     # Convert this Convertible's data to a Hash suitable for use by Liquid.
     # Overrides the default return data and adds any date-specific liquid attributes
     alias :super_to_liquid :to_liquid
-    def to_liquid
-      super_to_liquid.deep_merge(liquid_date_attributes)
+    def to_liquid(attrs = nil)
+      Utils.deep_merge_hashes super_to_liquid(attrs), liquid_date_attributes
     end
   end
 end
diff --git a/plugins/octopress_filters.rb b/plugins/octopress_filters.rb
index a2ed71f8..d88cd639 100644
--- a/plugins/octopress_filters.rb
+++ b/plugins/octopress_filters.rb
@@ -1,8 +1,9 @@
 #custom filters for Octopress
 require './plugins/backtick_code_block'
-require './plugins/post_filters'
+require 'jekyll-page-hooks'
+require 'jekyll-sitemap'
+require 'jekyll-date-format'
 require './plugins/raw'
-require './plugins/date'
 require 'rubypants'
 
 module OctopressFilters
@@ -21,7 +22,7 @@ module OctopressFilters
 end
 
 module Jekyll
-  class ContentFilters < PostFilter
+  class ContentFilters < PageHooks
     include OctopressFilters
     def pre_render(post)
       if post.ext.match('html|textile|markdown|md|haml|slim|xml')
diff --git a/plugins/pagination.rb b/plugins/pagination.rb
deleted file mode 100644
index a318754e..00000000
--- a/plugins/pagination.rb
+++ /dev/null
@@ -1,121 +0,0 @@
-module Jekyll
-
-  class Pagination < Generator
-    # This generator is safe from arbitrary code execution.
-    safe true
-
-    # Generate paginated pages if necessary.
-    #
-    # site - The Site.
-    #
-    # Returns nothing.
-    def generate(site)
-      site.pages.dup.each do |page|
-        paginate(site, page) if Pager.pagination_enabled?(site.config, page)
-      end
-    end
-
-    # Paginates the blog's posts. Renders the index.html file into paginated
-    # directories, e.g.: page2/index.html, page3/index.html, etc and adds more
-    # site-wide data.
-    #
-    # site - The Site.
-    # page - The index.html Page that requires pagination.
-    #
-    # {"paginator" => { "page" => <Number>,
-    #                   "per_page" => <Number>,
-    #                   "posts" => [<Post>],
-    #                   "total_posts" => <Number>,
-    #                   "total_pages" => <Number>,
-    #                   "previous_page" => <Number>,
-    #                   "next_page" => <Number> }}
-    def paginate(site, page)
-      all_posts = site.site_payload['site']['posts']
-      pages = Pager.calculate_pages(all_posts, site.config['paginate'].to_i)
-      page_dir = page.destination('').sub(/\/[^\/]+$/, '')
-      page_dir_config = site.config['pagination_dir']
-      dir = ((page_dir_config || page_dir) + '/').sub(/^\/+/, '')
-
-      (1..pages).each do |num_page|
-        pager = Pager.new(site.config, num_page, all_posts, page_dir+'/', '/'+dir, pages)
-        if num_page > 1
-          newpage = Page.new(site, site.source, page_dir, page.name)
-          newpage.pager = pager
-          newpage.dir = File.join(page.dir, "#{dir}page/#{num_page}")
-          site.pages << newpage
-        else
-          page.pager = pager
-        end
-      end
-    end
-  end
-
-  class Pager
-    attr_reader :page, :per_page, :posts, :total_posts, :total_pages, :previous_page, :next_page
-
-    # Calculate the number of pages.
-    #
-    # all_posts - The Array of all Posts.
-    # per_page  - The Integer of entries per page.
-    #
-    # Returns the Integer number of pages.
-    def self.calculate_pages(all_posts, per_page)
-      (all_posts.size.to_f / per_page.to_i).ceil
-    end
-
-    # Determine if pagination is enabled for a given file.
-    #
-    # config - The configuration Hash.
-    # file   - The String filename of the file.
-    #
-    # Returns true if pagination is enabled, false otherwise.
-    def self.pagination_enabled?(config, file)
-      file.name == 'index.html' && !config['paginate'].nil? && file.content =~ /paginator\./
-    end
-
-    # Initialize a new Pager.
-    #
-    # config    - The Hash configuration of the site.
-    # page      - The Integer page number.
-    # all_posts - The Array of all the site's Posts.
-    # num_pages - The Integer number of pages or nil if you'd like the number
-    #             of pages calculated.
-    def initialize(config, page, all_posts, index_dir, pagination_dir, num_pages = nil)
-      @page = page
-      @per_page = config['paginate'].to_i
-      @page_dir = pagination_dir + 'page/'
-      @total_pages = num_pages || Pager.calculate_pages(all_posts, @per_page)
-      @previous_page = nil
-
-      if @page > @total_pages
-        raise RuntimeError, "page number can't be greater than total pages: #{@page} > #{@total_pages}"
-      end
-
-      init = (@page - 1) * @per_page
-      offset = (init + @per_page - 1) >= all_posts.size ? all_posts.size : (init + @per_page - 1)
-
-      @total_posts = all_posts.size
-      @posts = all_posts[init..offset]
-      @previous_page = @page != 1 ? @page_dir + (@page - 1).to_s + '/' : nil
-      @previous_page = index_dir if @page - 1 == 1
-      @next_page = @page != @total_pages ? @page_dir + (@page + 1).to_s + '/' : nil
-    end
-
-    # Convert this Pager's data to a Hash suitable for use by Liquid.
-    #
-    # Returns the Hash representation of this Pager.
-    def to_liquid
-      {
-        'page' => page,
-        'per_page' => per_page,
-        'posts' => posts,
-        'total_posts' => total_posts,
-        'total_pages' => total_pages,
-        'previous_page' => previous_page,
-        'next_page' => next_page
-      }
-    end
-  end
-
-end
-
diff --git a/plugins/post_filters.rb b/plugins/post_filters.rb
deleted file mode 100644
index 08626802..00000000
--- a/plugins/post_filters.rb
+++ /dev/null
@@ -1,176 +0,0 @@
-module Jekyll
-
-  # Extended plugin type that allows the plugin
-  # to be called on varous callback methods.
-  #
-  # Examples:
-  # https://github.com/tedkulp/octopress/blob/master/plugins/post_metaweblog.rb
-  # https://github.com/tedkulp/octopress/blob/master/plugins/post_twitter.rb
-  class PostFilter < Plugin
-
-    #Called before post is sent to the converter. Allows
-    #you to modify the post object before the converter
-    #does it's thing
-    def pre_render(post)
-    end
-
-    #Called after the post is rendered with the converter.
-    #Use the post object to modify it's contents before the
-    #post is inserted into the template.
-    def post_render(post)
-    end
-
-    #Called after the post is written to the disk.
-    #Use the post object to read it's contents to do something
-    #after the post is safely written.
-    def post_write(post)
-    end
-  end
-
-  # Monkey patch for the Jekyll Site class. For the original class,
-  # see: https://github.com/mojombo/jekyll/blob/master/lib/jekyll/site.rb
-  class Site
-
-    # Instance variable to store the various post_filter
-    # plugins that are loaded.
-    attr_accessor :post_filters
-
-    # Instantiates all of the post_filter plugins. This is basically
-    # a duplication of the other loaders in Site#setup.
-    def load_post_filters
-      self.post_filters = Jekyll::PostFilter.subclasses.select do |c|
-        !self.safe || c.safe
-      end.map do |c|
-        c.new(self.config)
-      end
-    end
-  end
-
-  # Monkey patch for the Jekyll Post class. For the original class,
-  # see: https://github.com/mojombo/jekyll/blob/master/lib/jekyll/post.rb
-  class Post
-
-    # Copy the #write method to #old_write, so we can redefine #write
-    # method.
-    alias_method :old_write, :write
-
-    # Write the generated post file to the destination directory. It
-    # then calls any post_write methods that may exist.
-    #   +dest+ is the String path to the destination dir
-    #
-    # Returns nothing
-    def write(dest)
-      old_write(dest)
-      post_write if respond_to?(:post_write)
-    end
-  end
-
-  # Monkey patch for the Jekyll Page class. For the original class,
-  # see: https://github.com/mojombo/jekyll/blob/master/lib/jekyll/page.rb
-  class Page
-
-    # Copy the #write method to #old_write, so we can redefine #write
-    # method.
-    alias_method :old_write, :write
-
-    # Write the generated post file to the destination directory. It
-    # then calls any post_write methods that may exist.
-    #   +dest+ is the String path to the destination dir
-    #
-    # Returns nothing
-    def write(dest)
-      old_write(dest)
-      post_write if respond_to?(:post_write)
-    end
-  end
-
-  # Monkey patch for the Jekyll Convertible module. For the original class,
-  # see: https://github.com/mojombo/jekyll/blob/master/lib/jekyll/convertible.rb
-  module Convertible
-
-    def is_post?
-      self.class.to_s == 'Jekyll::Post'
-    end
-
-    def is_page?
-      self.class.to_s == 'Jekyll::Page'
-    end
-
-    def is_filterable?
-      is_post? or is_page?
-    end
-
-    # Call the #pre_render methods on all of the loaded
-    # post_filter plugins.
-    #
-    # Returns nothing
-    def pre_render
-      self.site.load_post_filters unless self.site.post_filters
-
-      if self.site.post_filters and is_filterable?
-        self.site.post_filters.each do |filter|
-          filter.pre_render(self)
-        end
-      end
-    end
-
-    # Call the #post_render methods on all of the loaded
-    # post_filter plugins.
-    #
-    # Returns nothing
-    def post_render
-      if self.site.post_filters and is_filterable?
-        self.site.post_filters.each do |filter|
-          filter.post_render(self)
-        end
-      end
-    end
-
-    # Call the #post_write methods on all of the loaded
-    # post_filter plugins.
-    #
-    # Returns nothing
-    def post_write
-      if self.site.post_filters and is_filterable?
-        self.site.post_filters.each do |filter|
-          filter.post_write(self)
-        end
-      end
-    end
-
-    # Copy the #transform method to #old_transform, so we can
-    # redefine #transform method.
-    alias_method :old_transform, :transform
-
-    # Transform the contents based on the content type. Then calls the
-    # #post_render method if it exists
-    #
-    # Returns nothing.
-    def transform
-      old_transform
-      post_render if respond_to?(:post_render)
-    end
-
-    # Copy the #do_layout method to #old_do_layout, so we can
-    # redefine #do_layout method.
-    alias_method :old_do_layout, :do_layout
-
-    # Calls the pre_render method if it exists and then adds any necessary
-    # layouts to this convertible document.
-    #
-    # payload - The site payload Hash.
-    # layouts - A Hash of {"name" => "layout"}.
-    #
-    # Returns nothing.
-    def do_layout(payload, layouts)
-      pre_render if respond_to?(:pre_render)
-      old_do_layout(payload, layouts)
-    end
-
-    # Returns the full url of the post, including the
-    # configured url
-    def full_url
-      self.site.config['url'] + self.url
-    end
-  end
-end
diff --git a/plugins/preview_unpublished.rb b/plugins/preview_unpublished.rb
deleted file mode 100644
index 28cbdfe7..00000000
--- a/plugins/preview_unpublished.rb
+++ /dev/null
@@ -1,48 +0,0 @@
-# Monkeypatch for Jekyll
-# Introduce distinction between preview/productive site generation
-# so posts with YAML attribute `published: false` can be previewed
-# on localhost without being published to the productive environment.
-
-module Jekyll
-
-  class Site
-    # Read all the files in <source>/<dir>/_posts and create a new Post
-    # object with each one.
-    #
-    # dir - The String relative path of the directory to read.
-    #
-    # Returns nothing.
-    def read_posts(dir)
-      base = File.join(self.source, dir, '_posts')
-      return unless File.exists?(base)
-      entries = Dir.chdir(base) { filter_entries(Dir['**/*']) }
-
-      # first pass processes, but does not yet render post content
-      entries.each do |f|
-        if Post.valid?(f)
-          post = Post.new(self, self.source, dir, f)
-
-          # Monkeypatch:
-          # On preview environment (localhost), publish all posts
-          if ENV.has_key?('OCTOPRESS_ENV') && ENV['OCTOPRESS_ENV'] == 'preview' && post.data.has_key?('published') && post.data['published'] == false
-            post.published = true
-            # Set preview mode flag (if necessary), `rake generate` will check for it
-            # to prevent pushing preview posts to productive environment
-            File.open(".preview-mode", "w") {}
-          end
-
-          if post.published && (self.future || post.date <= self.time)
-            self.posts << post
-            post.categories.each { |c| self.categories[c] << post }
-            post.tags.each { |c| self.tags[c] << post }
-          end
-        end
-      end
-
-      self.posts.sort!
-
-      # limit the posts if :limit_posts option is set
-      self.posts = self.posts[-limit_posts, limit_posts] if limit_posts
-    end
-  end
-end
diff --git a/plugins/sitemap_generator.rb b/plugins/sitemap_generator.rb
deleted file mode 100644
index a08590bf..00000000
--- a/plugins/sitemap_generator.rb
+++ /dev/null
@@ -1,312 +0,0 @@
-# Sitemap.xml Generator is a Jekyll plugin that generates a sitemap.xml file by
-# traversing all of the available posts and pages.
-#
-# How To Use:
-#   1) Copy source file into your _plugins folder within your Jekyll project.
-#   2) Change modify the url variable in _config.yml to reflect your domain name.
-#   3) Run Jekyll: jekyll --server to re-generate your site.
-#
-# Variables:
-#   * Change SITEMAP_FILE_NAME if you want your sitemap to be called something
-#     other than sitemap.xml.
-#   * Change the PAGES_INCLUDE_POSTS list to include any pages that are looping
-#     through your posts (e.g. "index.html", "archive.html", etc.). This will
-#     ensure that right after you make a new post, the last modified date will
-#     be updated to reflect the new post.
-#   * A sitemap.xml should be included in your _site folder.
-#   * If there are any files you don't want included in the sitemap, add them
-#     to the EXCLUDED_FILES list. The name should match the name of the source
-#     file.
-#   * If you want to include the optional changefreq and priority attributes,
-#     simply include custom variables in the YAML Front Matter of that file.
-#     The names of these custom variables are defined below in the
-#     CHANGE_FREQUENCY_CUSTOM_VARIABLE_NAME and PRIORITY_CUSTOM_VARIABLE_NAME
-#     constants.
-#
-# Notes:
-#   * The last modified date is determined by the latest from the following:
-#     system modified date of the page or post, system modified date of
-#     included layout, system modified date of included layout within that
-#     layout, ...
-#
-# Author: Michael Levin
-# Site: http://www.kinnetica.com
-# Distributed Under A Creative Commons License
-#   - http://creativecommons.org/licenses/by/3.0/
-#
-# Modified for Octopress by John W. Long
-#
-require 'rexml/document'
-require 'fileutils'
-
-module Jekyll
-
-  # Change SITEMAP_FILE_NAME if you would like your sitemap file
-  # to be called something else
-  SITEMAP_FILE_NAME = "sitemap.xml"
-
-  # Any files to exclude from being included in the sitemap.xml
-  EXCLUDED_FILES = ["atom.xml"]
-
-  # Any files that include posts, so that when a new post is added, the last
-  # modified date of these pages should take that into account
-  PAGES_INCLUDE_POSTS = ["index.html"]
-
-  # Custom variable names for changefreq and priority elements
-  # These names are used within the YAML Front Matter of pages or posts
-  # for which you want to include these properties
-  CHANGE_FREQUENCY_CUSTOM_VARIABLE_NAME = "change_frequency"
-  PRIORITY_CUSTOM_VARIABLE_NAME = "priority"
-
-  class Post
-    attr_accessor :name
-
-    def full_path_to_source
-      File.join(@base, @name)
-    end
-
-    def location_on_server
-      "#{site.config['url']}#{url}"
-    end
-  end
-
-  class Page
-    attr_accessor :name
-
-    def full_path_to_source
-      File.join(@base, @dir, @name)
-    end
-
-    def location_on_server
-      location = "#{site.config['url']}#{@dir}#{url}"
-      location.gsub(/index.html$/, "")
-    end
-  end
-
-  class Layout
-    def full_path_to_source
-      File.join(@base, @name)
-    end
-  end
-
-  # Recover from strange exception when starting server without --auto
-  class SitemapFile < StaticFile
-    def write(dest)
-      begin
-        super(dest)
-      rescue
-      end
-
-      true
-    end
-  end
-
-  class SitemapGenerator < Generator
-
-    # Valid values allowed by sitemap.xml spec for change frequencies
-    VALID_CHANGE_FREQUENCY_VALUES = ["always", "hourly", "daily", "weekly",
-      "monthly", "yearly", "never"]
-
-    # Goes through pages and posts and generates sitemap.xml file
-    #
-    # Returns nothing
-    def generate(site)
-      sitemap = REXML::Document.new << REXML::XMLDecl.new("1.0", "UTF-8")
-
-      urlset = REXML::Element.new "urlset"
-      urlset.add_attribute("xmlns",
-        "http://www.sitemaps.org/schemas/sitemap/0.9")
-
-      @last_modified_post_date = fill_posts(site, urlset)
-      fill_pages(site, urlset)
-
-      sitemap.add_element(urlset)
-
-      # File I/O: create sitemap.xml file and write out pretty-printed XML
-      unless File.exists?(site.dest)
-        FileUtils.mkdir_p(site.dest)
-      end
-      file = File.new(File.join(site.dest, SITEMAP_FILE_NAME), "w")
-      formatter = REXML::Formatters::Pretty.new(4)
-      formatter.compact = true
-      formatter.write(sitemap, file)
-      file.close
-
-      # Keep the sitemap.xml file from being cleaned by Jekyll
-      site.static_files << Jekyll::SitemapFile.new(site, site.dest, "/", SITEMAP_FILE_NAME)
-    end
-
-    # Create url elements for all the posts and find the date of the latest one
-    #
-    # Returns last_modified_date of latest post
-    def fill_posts(site, urlset)
-      last_modified_date = nil
-      site.posts.each do |post|
-        if !excluded?(post.name)
-          url = fill_url(site, post)
-          urlset.add_element(url)
-        end
-
-        path = post.full_path_to_source
-        date = File.mtime(path)
-        last_modified_date = date if last_modified_date == nil or date > last_modified_date
-      end
-
-      last_modified_date
-    end
-
-    # Create url elements for all the normal pages and find the date of the
-    # index to use with the pagination pages
-    #
-    # Returns last_modified_date of index page
-    def fill_pages(site, urlset)
-      site.pages.each do |page|
-        if !excluded?(page.name)
-          path = page.full_path_to_source
-          if File.exists?(path)
-            url = fill_url(site, page)
-            urlset.add_element(url)
-          end
-        end
-      end
-    end
-
-    # Fill data of each URL element: location, last modified,
-    # change frequency (optional), and priority.
-    #
-    # Returns url REXML::Element
-    def fill_url(site, page_or_post)
-      url = REXML::Element.new "url"
-
-      loc = fill_location(page_or_post)
-      url.add_element(loc)
-
-      lastmod = fill_last_modified(site, page_or_post)
-      url.add_element(lastmod) if lastmod
-
-      if (page_or_post.data[CHANGE_FREQUENCY_CUSTOM_VARIABLE_NAME])
-        change_frequency =
-          page_or_post.data[CHANGE_FREQUENCY_CUSTOM_VARIABLE_NAME].downcase
-
-        if (valid_change_frequency?(change_frequency))
-          changefreq = REXML::Element.new "changefreq"
-          changefreq.text = change_frequency
-          url.add_element(changefreq)
-        else
-          puts "ERROR: Invalid Change Frequency In #{page_or_post.name}"
-        end
-      end
-
-      if (page_or_post.data[PRIORITY_CUSTOM_VARIABLE_NAME])
-        priority_value = page_or_post.data[PRIORITY_CUSTOM_VARIABLE_NAME]
-        if valid_priority?(priority_value)
-          priority = REXML::Element.new "priority"
-          priority.text = page_or_post.data[PRIORITY_CUSTOM_VARIABLE_NAME]
-          url.add_element(priority)
-        else
-          puts "ERROR: Invalid Priority In #{page_or_post.name}"
-        end
-      end
-
-      url
-    end
-
-    # Get URL location of page or post
-    #
-    # Returns the location of the page or post
-    def fill_location(page_or_post)
-      loc = REXML::Element.new "loc"
-      loc.text = page_or_post.location_on_server
-
-      loc
-    end
-
-    # Fill lastmod XML element with the last modified date for the page or post.
-    #
-    # Returns lastmod REXML::Element or nil
-    def fill_last_modified(site, page_or_post)
-      path = page_or_post.full_path_to_source
-
-      lastmod = REXML::Element.new "lastmod"
-      date = File.mtime(path)
-      latest_date = find_latest_date(date, site, page_or_post)
-
-      if @last_modified_post_date == nil
-        # This is a post
-        lastmod.text = latest_date.iso8601
-      else
-        # This is a page
-        if posts_included?(page_or_post.name)
-          # We want to take into account the last post date
-          final_date = greater_date(latest_date, @last_modified_post_date)
-          lastmod.text = final_date.iso8601
-        else
-          lastmod.text = latest_date.iso8601
-        end
-      end
-      lastmod
-    end
-
-    # Go through the page/post and any implemented layouts and get the latest
-    # modified date
-    #
-    # Returns formatted output of latest date of page/post and any used layouts
-    def find_latest_date(latest_date, site, page_or_post)
-      layouts = site.layouts
-      layout = layouts[page_or_post.data["layout"]]
-      while layout
-        path = layout.full_path_to_source
-        date = File.mtime(path)
-
-        latest_date = date if (date > latest_date)
-
-        layout = layouts[layout.data["layout"]]
-      end
-
-      latest_date
-    end
-
-    # Which of the two dates is later
-    #
-    # Returns latest of two dates
-    def greater_date(date1, date2)
-      if (date1 >= date2)
-        date1
-      else
-        date2
-      end
-    end
-
-    # Is the page or post listed as something we want to exclude?
-    #
-    # Returns boolean
-    def excluded?(name)
-      EXCLUDED_FILES.include? name
-    end
-
-    def posts_included?(name)
-      PAGES_INCLUDE_POSTS.include? name
-    end
-
-    # Is the change frequency value provided valid according to the spec
-    #
-    # Returns boolean
-    def valid_change_frequency?(change_frequency)
-      VALID_CHANGE_FREQUENCY_VALUES.include? change_frequency
-    end
-
-    # Is the priority value provided valid according to the spec
-    #
-    # Returns boolean
-    def valid_priority?(priority)
-      begin
-        priority_val = Float(priority)
-        return true if priority_val >= 0.0 and priority_val <= 1.0
-      rescue ArgumentError
-      end
-
-      false
-    end
-  end
-end
-