# File lib/jekyll/site.rb, line 32
    def setup
      # Check to see if LSI is enabled.
      require 'classifier' if self.lsi

      # Set the Markdown interpreter (and Maruku self.config, if necessary)
      case self.config['markdown']
        when 'rdiscount'
          begin
            require 'rdiscount'

            def markdown(content)
              RDiscount.new(content).to_html
            end

          rescue LoadError
            puts 'You must have the rdiscount gem installed first'
          end
        when 'maruku'
          begin
            require 'maruku'

            def markdown(content)
              Maruku.new(content).to_html
            end

            if self.config['maruku']['use_divs']
              require 'maruku/ext/div'
              puts 'Maruku: Using extended syntax for div elements.'
            end

            if self.config['maruku']['use_tex']
              require 'maruku/ext/math'
              puts "Maruku: Using LaTeX extension. Images in `#{self.config['maruku']['png_dir']}`."

              # Switch off MathML output
              MaRuKu::Globals[:html_math_output_mathml] = false
              MaRuKu::Globals[:html_math_engine] = 'none'

              # Turn on math to PNG support with blahtex
              # Resulting PNGs stored in `images/latex`
              MaRuKu::Globals[:html_math_output_png] = true
              MaRuKu::Globals[:html_png_engine] =  self.config['maruku']['png_engine']
              MaRuKu::Globals[:html_png_dir] = self.config['maruku']['png_dir']
              MaRuKu::Globals[:html_png_url] = self.config['maruku']['png_url']
            end
          rescue LoadError
            puts "The maruku gem is required for markdown support!"
          end
        else
          raise "Invalid Markdown processor: '#{self.config['markdown']}' -- did you mean 'maruku' or 'rdiscount'?"
      end
    end