Continually execute mongo JS

mongoupdate.sh

#!/bin/bash

function error {
    echo -e "\033[91mAn error was encountered! $1\033[0m"
    exit 1
}

if [ "$#" -ne 2 ]; then
    error "Usage: mongoupdate DATABASE SCRIPT"
fi

MONGO_HOST="localhost"
DATABASE=$1
SCRIPT=$2

if [ ! -e $SCRIPT ]; then
    error "File $SCRIPT does not exist!"
fi

echo -e "\033[32mExecuting $SCRIPT on $DATABASE\033[0m"

COMMAND="mongo $MONGO_HOST/$DATABASE $SCRIPT"

watch -n0.5 $COMMAND