The author no longer uses Redmine and cannot effectively update and maintain this repo.
Redmine uses CodeRay for code syntax highlighting. The Redmine jsToolbar CodeRay Extension adds a button to the Redmine wiki and text editor toolbar for quick insert of all supported code syntax highlighting to make it easy to insert the code.
This plugin requires the Redmine jsToolbar Ext plugin to also be installed.
$ cd redmine/plugins
$ git clone https://github.com/tleish/redmine_jstoolbar_ext
$ git clone https://github.com/tleish/redmine_jstoolbar_ext_coderay
restart Redmine