Problem with Teamcity + Fabfile + Virtualenv?

Question

Python

The task is simple - create a virtual environment, clone the project from Github, install dependencies from req.txt and test the project.
The fabfile.py contains commands for creating a virtual environment, as well as installing dependencies from the req.txt file. An
environment is created, but it is not possible to install dependencies in a specific environment, they are installed in the global environment. I can't activate the environment, the source command does not work in the sh interpreter, and no matter how hard I try to indicate that I want to use the bash interpreter, this does not help.
How to work with source and activate (virtualenv) in sh?

Answer 1

In extreme cases, you can do it without activate:

virtualevn -p python2.7 path/to/your/env
path/to/your/env/bin/pip install -r req.txt