title: Pretty print code to PDF
body: <p>I'm searching for a tool that will take a source directory and produce a single PDF containing the source code, preferably with syntax highlighting.</p>
  
  <p>I would like to read the PDF on my phone, in order to get familiar with a code-base, or just to see what I can learn by reading a lot of code. I will most often be reading Ruby.</p>
  
  <p>I would prefer if the tool ran on Linux. I don't mind paying for a tool if it is particularly good.</p>
  
  <p>Any suggestions?</p>