For developer needs you may want to test the latest unstable version of R or try the stable version with recent patches. In that case the source code will be fetched from the official SVN server in the following ways.
For R stable + patches (SVN server):
$ ./roaster --set-branch
For R unstable (SVN server):
$ ./roaster --set-trunk
To switch back to stable:
$ ./roaster --set-stable
Easy.
Test a standard build as usual:
$ ./roaster --build-standard
Are available other commands:
Fetch latest 2 repositories (optional):
$ ./roaster --svn-repo-fetch
Update local svn repositories (optional):
$ ./roaster --svn-repo-update
List informations about the most recent repositories:
$ ./roaster --svn-repo-branches
Enjoy.