# Title: Render Partial Tag for Jekyll
 # Author: Brandon Mathis http://brandonmathis.com
 # Description: Import files on your filesystem into any blog post and render them inline.

 # Note: Paths are relative to the source directory, if you import a file with yaml front matter, the yaml will be stripped out.

 #
 # Syntax {% render_partial path/to/file %}
 #
 # Example 1:
 # {% render_partial about/_bio.markdown %}
 #
 # This will import source/about/_bio.markdown and render it inline.
 # In this example I used an underscore at the beginning of the filename to prevent Jekyll
 # from generating an about/bio.html (Jekyll doesn't convert files beginning with underscores)
 #
 # Example 2:
 # {% render_partial ../README.markdown %}
 #
 # You can use relative pathnames, to include files outside of the source directory.
 # This might be useful if you want to have a page for a project's README without having
 # to duplicated the contents
 #

 #

 
 require 'pathname'
 
 module Jekyll
 
   class RenderPartialTag < Liquid::Tag
     def initialize(tag_name, file, tokens)
       super
       @file = file.strip
     end
 
     def render(context)
       file_dir = (context.registers[:site].source || 'source')
       file_path = Pathname.new(file_dir).expand_path
       file = file_path + @file
 
       unless file.file?
         return "File #{file} could not be found"
       end
 
       Dir.chdir(file_path) do

         contents = file.read
         if contents =~ /\A-{3}.+[^\A]-{3}\n(.+)/m
           contents = $1.lstrip
         end
         partial = Liquid::Template.parse(contents)

         context.stack do
           partial.render(context)
         end
       end
     end
   end
 end
 
 Liquid::Template.register_tag('render_partial', Jekyll::RenderPartialTag)