title: How do I add custom functions to Sass (via Sass::Script::Functions)?
body: <p>I am using vanilla Sass (no Compass/SUZY/Bourbon/etc.) and I'm having trouble figuring out where to put my *.rb file.  I am not a Ruby programmer, but I did find a function someone else wrote that does what I need.  I've tried searching, but the results I've come up with are dead ends.</p>
  
  <p>The official docs themselves offer no clues, only how to create a custom function:
  <a href="http://sass-lang.com/docs/yardoc/Sass/Script/Functions.html#adding_custom_functions" rel="nofollow noreferrer">http://sass-lang.com/docs/yardoc/Sass/Script/Functions.html#adding_custom_functions</a></p>
  
  <pre><code>sass styles.scss styles.css -r custom.rb
  </code></pre>
  
  <p>LoadError: no such file to load -- static/sass/modules/lib/custom.rb while trying this solution (despite being able to VI the file):
  <a href="http://www.seancolombo.com/2010/07/28/how-to-make-and-use-a-custom-sass-function/" rel="nofollow noreferrer">http://www.seancolombo.com/2010/07/28/how-to-make-and-use-a-custom-sass-function/</a></p>
  
  <p>This is the closest SO question I could find, but I'm not using Compass or Rails so the solutions don't make any sense to me:
  <a href="https://stackoverflow.com/questions/8690372/how-do-i-load-extensions-to-the-sassscriptfunctions-module">How do I load extensions to the Sass::Script::Functions module?</a></p>
  
  <p>I would like to keep my custom functions within my modules directory (which contains my own custom Bootstrap library).  But if it has to go elsewhere, I can live with that.</p>