I would like to add a file to a remote svn repository without checking out the project.
svn add
requires the project to be checked out
sv
I think it got it. The secret is to include the file name on the url
svn import -m "Adding just a file" file_name http://path/to/svn/repo/file_name
This might not be what you are looking for but you can use -N flag to checkout a code non-recursively.
Example:
svn co -N http://svn.example.com/repo/trunk
This will not checkout all the sub-directories. Which is much faster if you are just trying to add a file.
You should be able to use svn import
:
$ svn help import
import: Commit an unversioned file or tree into the repository.
Import is able to add individual files and trees to a repository.
SCMs are meant to version your code. Perhaps you want to use an FTP server.