[_ck_]

Ah there is probably a more developed guide on the WordPress side, let me see if I can find it for you.

update: here’s a few guides – essentially the process is identical to the WordPress side except the URL used is going to be https://plugins-svn.bbpress.org/

guides:

http://www.binarymoon.co.uk/2008/01/wordpress-plugin-subversion-guide/

https://wordpress.org/extend/plugins/about/svn/