A simple wrapper for virtualenv

ve.sh

#
# ve NAME           creates and activates venv
# ve wipe           remove and deactivate current venv
# ve wipe NAME...   remove multiple venvs
# ve list           print all venvs
#
function ve {
    local VE_DIR="$HOME/.ve"

    if [ ! -x "$(which virtualenv)" ]; then
        echo "virtualenv is not installed";
        return;
    fi;

    case $1 in 
    "" )
        echo "ve wipe [NAME...]  Erase virtual envs";
        echo "ve list   List all virtual envs";
        echo "ve NAME   Create or activate virtual env";
        ;;
    "wipe" )

        shift;

        #
        # ve wipe w/o arguments removes current venv
        #
        if [ "$#" -eq 0 -a -d "$VIRTUAL_ENV" ]; then
            rm -rf "$VIRTUAL_ENV";
        fi;

        #
        # ve wipe with arguments removes each argument
        #
        local VENVS="$(ve list)"
        for ENV in $@; do
            local DIR="$VE_DIR/$ENV";
            if [[ "$VENVS" =~ "$ENV" ]] && [ -d "$DIR" ]; then 
                rm -rf "$DIR";
            fi;
        done

        #
        # ve wipe deactivates an activated but deleted venv
        #
        if [ "$VIRTUAL_ENV" -a ! -d "$VIRTUAL_ENV" ]; then
            deactivate;
        fi;

        ;;
    "list" ) 
        if [ ! -d "$VE_DIR" ]; then
            mkdir "$VE_DIR";
        fi;
        ls -1 "$VE_DIR";
        ;;
    * )

        #
        # ve NAME deactivates, creates if necessary, then activates
        #
        if [ -d "$VIRTUAL_ENV" ]; then
            deactivate;
        fi;

        if [ ! -d "$VE_DIR/$1" ]; then
            virtualenv "$VE_DIR/$1"; 
        fi;

        if [ -e "$VE_DIR/$1/bin/activate" ]; then
            . "$VE_DIR/$1/bin/activate"; 
        fi
        ;;
    esac
}