If you want to keep your project in Subversion, Google only gives you automated script for Sourceforge. In fact it is easy to migrate the repo to another host, e.g. Assembla
e.g.
OLDREPO=drupal-contrib svnrdump dump https://$OLDREPO.googlecode.com/svn | gzip -9 > ${OLDREPO}_dump.gz gzip -l ${OLDREPO}_dump.gz # find the original size
An open-source assembla space can be created here: www.assembla.com/…n_repository
And then import the zip directly into Assembla.
Now we need to relocate the repo information:
LOCAL=drupal-contrib OLDREPO=drupal-contrib NEWREPO=drupal_contrib svn up $LOCAL #cd to the directory above NEWHOST=https://subversion.assembla.com/svn svn relocate https://$OLDREPO.googlecode.com/svn $NEWHOST/$NEWREPO/ $LOCAL --username myname #or for old subversion svn sw --relocate https://$OLDREPO.googlecode.com/svn $NEWHOST/$NEWREPO/ $LOCAL --username myname #note that you might have to use http if that is how it is set up. svn up $LOCAL # check it works