Short answer: None. Each individual check has its own database. I am sure that if you understand the deep magic hidden inside the .svn directory, you can execute it to do what you want. However, unlike versions 1.1 - 1.6 of Subversion, the structure of this .svn directory .svn much more complicated and not so clear.
In your case, it is best to check everything, and do a new check to include both projects.
If you want to do this on a regular basis, then you should use --depth= in svn co and --set-depth= in svn update .
For example, I check the base directory, but I donβt need anything else:
$ svn co --depth=immediates http:
This checks the .settings and .classpath , as well as the foundation , client and server directories, but nothing else. It is fast and I do not check many things that I do not want.
Now I want to work on the server:
$ cd base_prod $ svn update --set-depth=infinity server
This will update my server directory, but will check the entire directory structure. Now I can work with server , but I do not have the foundation or client files taking up space.
Later I would like to do some work in the foundation :
$ svn update --set-depth = infinity base
Now I have a foundation directory. And I have only one .svn directory in my base_prod directory.