Jekyll Syntax Highlighting Not Working - Classes Are Not Being Added

Question

I cannot get syntax highlighting to work on my Jekyll-powered blog.

The development files can be found here: https://github.com/StevenXL/stevenxl.github.io.

Answer 1

For me this seemed to be a casing issue for my language hints.

Did not work:

``` SQL

Worked:

``` sql

Answer 2

You must use the Jekyll highlight tag

{% highlight ruby %}
def foo
  puts 'foo'
end
{% endhighlight %}

Answer 3

I had the same issue using the monokai highlighting css from the jekyll-uno theme.

To solve the problem I had to update the CSS, using rouge itself is quite straightforward (taken from the docs):

rougify style monokai > css/monokai.css

There are other themes available, too.