run a command in virtualenv, useful for supervisord

runinenv.sh

#!/bin/bash
VENV=$1
if [ -z $VENV ]; then
    echo "usage: runinenv [virtualenv_path] CMDS"
    exit 1
fi
. ${VENV}/bin/activate
shift 1
echo "Executing $@ in ${VENV}"
exec "$@"
deactivate

supervisord.conf

; rest of conf omitted for brevity
[program:handlerbag]
command=sh runinenv /opt/envs/handlerbag handlerbag.py --port=5000
directory=/opt/envs/handlerbag