Using the paginaton generator from Jekyll's repo.

plugins/pagination.rb

@@ -1,52 +1,55 @@
 module Jekyll
+  module Generators
+    class Pagination < Generator
+      # This generator is safe from arbitrary code execution.
+      safe true
 
-  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
+      # 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.name)
         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)
+        (1..pages).each do |num_page|
+          pager = Pager.new(site.config, num_page, all_posts, pages)
+          if num_page > 1
+            newpage = Page.new(site, site.source, page.dir, page.name)
+            newpage.pager = pager
+            newpage.dir = File.join(page.dir, paginate_path(site, num_page))
+            site.pages << newpage
+          else
+            page.pager = pager
+          end
+        end
+      end
+
+      private
+        def paginate_path(site, num_page)
+          format = site.config['paginate_path']
+          format.sub(':num', num_page.to_s)
+        end
     end
   end
 
@@ -70,7 +73,7 @@ module Jekyll
     #
     # Returns true if pagination is enabled, false otherwise.
     def self.pagination_enabled?(config, file)
-      file.name == 'index.html' && !config['paginate'].nil? && file.content =~ /paginator\./
+      file == 'index.html' && !config['paginate'].nil?
     end
 
     # Initialize a new Pager.
@@ -80,12 +83,10 @@ module Jekyll
     # 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)
+    def initialize(config, page, all_posts, 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}"
@@ -96,9 +97,8 @@ module Jekyll
 
       @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
+      @previous_page = @page != 1 ? @page - 1 : nil
+      @next_page = @page != @total_pages ? @page + 1 : nil
     end
 
     # Convert this Pager's data to a Hash suitable for use by Liquid.
@@ -116,5 +116,4 @@ module Jekyll
       }
     end
   end
-
 end