How to use Radiant trunk in your subversion-managed project

If you are developing a project based around Radiant, and want to use Radiant trunk (or some other non-gem version), here is how to do that.

1. cd ~/src
2. svn co http://svn.radiantcms.org/radiant/trunk/radiant/ radiant_trunk
3. cd radiant_trunk/config
4. ln -s database.mysql.yml database.yml
5. script/generate instance -d mysql ~/your/project/trunk
6. cd ~/your/project; svn add trunk; svn commit -m"initial radiant file structure, without pointing to a custom radiant version (yet)"
7. cd vendor and set your Radiant version…
   1. With a subversion external:
      svn propset svn:externals 'radiant http://svn.radiantcms.org/radiant/trunk/radiant/ .'
   2. With piston:
      piston import http://svn.radiantcms.org/radiant/trunk/radiant/
8. svn commit -m"Fixing project to specific Radiant version."