A simple WordPress shortcode for embedding a GitHub Gist

github-gist-wp-shortcode.php

<?php
/**
 * Github Gists
 * Usage: [gist url="https://gist.github.com/corenominal/0efedf14eca28453a58e"]
 */
function corenominal_shortcode_gist( $atts, $content = null)
{
	$atts = shortcode_atts(
		array(
			'url' => 'https://gist.github.com/corenominal/0efedf14eca28453a58e'
		), $atts
	);
  return '<script src="' . $atts['url'] . '.js"></script>';
}
add_shortcode( 'gist', 'corenominal_shortcode_gist' );