Shell function to enable the "logical" virtualenv based on your current directory

venvnow.sh

function venvnow() {
    GREEN="\033[0;32m"
    NC='\033[0m' # No Color
    venv_default_root=~/dev/venvs

    function try_dotvenv {
        if [ -d '.venv' ]; then
            echo -e "  - found ${GREEN}.venv${NC} directory"
            if [ -f ".venv/bin/activate" ]; then
                source .venv/bin/activate
                echo -e "  - success (${GREEN}.venv${NC})"
                return 0
            fi
        fi

        if [ -f '.venv' ]; then
            venv_name=$(<.venv)
            echo -e "  - found .venv file (${GREEN}$venv_name${NC})"
            if [ -f "$venv_default_root/$venv_name/bin/activate" ]; then
                source $venv_default_root/$venv_name/bin/activate
                echo -e "  - success ($venv_default_root/${GREEN}$venv_name${NC})"
                return 0
            fi

            if [ -f "./$venv_name/bin/activate/" ]; then
                source ./$venv_name/bin/activate
                echo -e "  - success (./${GREEN}$venv_name${NC})"
                return 0
            fi
        fi
        return 1
    }

    function try_pipenv {
        if [ -f "Pipfile" ]; then
            source $(pipenv --venv)/bin/activate
            echo -e "  - success (${GREEN}pipenv${NC})"
            return 0
        fi
        return 1
    }

    function try_local_venv {
        if [ -d venv ]; then
            echo -e "  - found local ${GREEN}./venv/${NC}, using that"
            source ./venv/bin/activate
            return 0
        fi
        return 1
    }

    function try_dirname {
        cur_dir=`pwd`
        venv_name=$(basename "$cur_dir")
        if [ -d $venv_default_root/$venv_name ]; then
            echo "  - using current directory name: $venv_name"
            echo "  - $venv_default_root/${GREEN}$venv_name${NC}"
            source $venv_default_root/$venv_name/bin/activate
            return 0
        fi
        return 1
    }

    if try_pipenv ; then return 0; fi
    if try_dotvenv ; then return 0; fi
    if try_local_venv ; then return 0; fi
    if try_dirname ; then return 0; fi

    echo "  - unable to set venv"
    return 1
}