I've got a script, named s, on a remote server that activates a virtual environment like this:
source venv/bin/activate
When SSH-ed into the server, I'm able to activate the environment by
. s
And I SSH into the server as following:
ssh -t host@useruser@host "cd /path/to/dir ; /bin/bash"
 In addition to changing the working directory to /path/to/dir it would be nice if I could activate the environment right away each time I log into the server. But no matter where I put . s into the the SSH command, using -c for /bin/bash or not, the session always ends immediately.