title: How to generate PDF from markdown using pure ruby
body: <p>I'm currently using Kramdown to generate HTML from Markdown in Ruby.
  I know that I can generate a latex file using kramdown and convert it to pdf usaing a command line utility. But I want a pure ruby solution.</p>
  
  <p>Is there a way to convert markdown to pdf using only ruby without using command-line utilities?</p>