This plugin is no longer maintained. If you are interested in taking over the plugin, please leave a notice in the issues.
Includes rainbow.js a syntax highlighting script written by Craig Campbell. Line numbering through rainbow.linenumbers by Ron Valstar.
This is the development repository. If you just want to use the plugin you can find it in the WordPress plugin repository.
In wp plugin directory:
git clone https://github.com/mcguffin/wp-rainbow-hilite
cd wp-rainbow-hilite
npm install
gulp
See the Project Wiki for details.