venv.sh

#!/bin/bash

# install by adding:
#   alias venv=". ~/location/venv.sh" 
# to .bashrc


help_string="venv [option] [VENV_NAME]
    VENV_NAME
        activates VENV_NAME is it exists
    -l
        DEFAULT
        Lists all virtualenvs and shows which is currently activated

    -c, --create
        create and activates new virtualenv VENV_NAME

    -q, --quit
        same as 'deactivate'
        deactivates current virtualenv
    -h, --help
        shows help string
"

[[ "$VIRTUAL_ENV" == "" ]]; INVENV=$?

arg=$1
typeset -l arg


if [[ "$arg" == "-l" ]] || [[ "$arg" == "" ]]
then
    # Listing
    for D in $(find ~/.virtualevns -mindepth 1 -maxdepth 1 -type d);
    do 
        directory=$(echo $D | cut -d'/' -f 5)
        if [[ "$D" == "$VIRTUAL_ENV" ]]
        then
            echo "[*] $directory"
        else
            echo "[ ] $directory"
        fi
    done

elif [[ "$arg" == "-q" ]] || [[ "$arg" == "--quit" ]]
then
    if [[ "$INVENV" == "1" ]]
    then
        echo "deactivating..."
        deactivate
    else
        echo "Not in a virtualenv"
    fi
    
elif [[ "$arg" == "-c" ]] || [[ "$arg" == "--create" ]]
then
    name=$2
    if [[ "$name" != "" ]]
    then
        curr_dir=$PWD
        echo "creating $name"
        cd ~/.virtualevns
        virtualenv $name
        echo "created $name"
        source ~/.virtualevns/$name/bin/activate
        echo "'deactivate' to exit"
        venv -l
        cd $curr_dir
    else
        echo "No name specified"
        echo "venv -c <name>"
    fi
elif [[ "$arg" == "-h" ]] || [[ "$arg" == "--help" ]]
then
    echo "$help_string"
else

    if [[ "$arg" != "" ]]
    then
        # setting
        # check if valid
        valid=0
        venv_path=""
        for D in $(find ~/.virtualevns -mindepth 1 -maxdepth 1 -type d);
        do 
            directory=$(echo $D | cut -d'/' -f 5)
            if [[ "$arg" == "$directory" ]]
            then
                valid=1
                venv_path=$D
            fi
        done
        if [[ "$valid" == "1" ]]
        then
            echo "activating '$arg'"
            curr_dir=$PWD
            source ~/.virtualevns/$arg/bin/activate
            echo "'deactivate' to exit"
            venv -l
        else
            echo "\"$arg\" not found"
        fi
    else
        echo $help_string
    fi
fi