if [ ! -e venv ];then
    virtualenv venv
    source venv/bin/activate
    if pip -V | grep `pwd -P`; then
        pip install --upgrade pip
        pip_upgrade_all
        find . -name requirements.txt | xargs -L 1 pip install -r
        deactivate
    else
        echo Could not activate venv!
    fi
else
    echo Virtualenv already exists!
fi