Automatic environment set up and tear down. A zsh hook looks for .venv files and activates/deactivates them upon entering/leaving a directory.

.venv

#!/bin/bash
DIR=$(dirname $0)
REDISBIN="/usr/bin/redis-server"
REDISCONF="configs/redis-mine"
source $DIR/bin/activate

v_activate() {
    MANAGE="${VIRTUAL_ENV}/manage.py"

    function r() {
        ${DIR}/scripts/run
    }

    function s() {
        ${MANAGE} shell $@
    }

    function t() {
        sudo $REDISBIN "$REDISCONF/sumo-test.conf"
        pid=$!
        ${VIRTUAL_ENV}/manage.py test -s --noinput --logging-clear-handlers \
            --with-id --with-progressive $@
        kill $pid
    }
}

v_deactivate() {
    deactivate
    unfunction r
    unfunction s
    unfunction t
}

# vim: filetype=zsh

21_auto_venv

export AUTO_VENV_LAST_DIR=""

chpwd_auto_venv () {
    dir=$(pwd)
    last=""

    while true; do
        if [[ -f $dir/.venv ]]; then
            if [[ $dir = $AUTO_VENV_LAST_DIR ]]; then
                return 0
            fi
            source $dir/.venv
            v_activate
            export AUTO_VENV_LAST_DIR=$dir
            return 0
        fi
        if [[ -n $last ]]; then
            if [[ -n "$AUTO_VENV_LAST_DIR" ]]; then
                source "${AUTO_VENV_LAST_DIR}/.venv"
                v_deactivate
                export AUTO_VENV_LAST_DIR=""
                return 0
            fi
            return 0
        fi
        dir=$(dirname $dir)
        if [[ "/" = $dir ]]; then
            last=1
        fi
    done
}

add-zsh-hook chpwd chpwd_auto_venv

chpwd_auto_venv

#EOF vim: ft=zsh