Enable virtualenv in git repos if .venv is available

bashrc.sh

## Put this in your .bashrc


function workon_cwd {
        if  git rev-parse --is-inside-work-tree > /dev/null 2>/dev/null
        then
                REPO_TOPLEVEL=`git rev-parse --show-cdup`
                if [ -f "./$REPO_TOPLEVEL/.venv" ]
                then
                        ENV_NAME=`cat "./$REPO_TOPLEVEL/.venv"`
                        # Activate the environment only if it is not already active
                        if [ "$VIRTUAL_ENV" != "$WORKON_HOME/$ENV_NAME" ]
                        then
                                workon "$ENV_NAME" && export CD_VIRTUAL_ENV="$ENV_NAME"
                        fi
                fi
        elif [ $CD_VIRTUAL_ENV ]; then
                # We've just left the repo, deactivate the environment
                # Note: this only happens if the virtualenv was activated automatically
                deactivate && unset CD_VIRTUAL_ENV
        fi
}


# Might conflict with other cd implemntations. Perhaps don't call builtin cd but whatever other cd implementation also exists
function cd {
        builtin cd "$@" && workon_cwd
}

workon_cwd