#!/bin/bash
#
# Place this script into your script folder and use like this:
#
#     ./script/wrap-env.sh .env $(npm bin grunt)/grunt serve
#
# Your .env file must have exports in it, not just a list of variable like Docker env files work
#
usage="$(basename "$0") [-h] .env_file command [arg ...]

where:
    first argument must be env variable file
    second argument must be a command you want to run, for example \`grunt\`
    optionally followed by the arguments to the command"

while getopts ':h' option; do
  case "$option" in
    h) echo "$usage"
       exit
       ;;
   \?) printf "illegal option: -%s\n" "$OPTARG" >&2
       echo "$usage" >&2
       exit 1
       ;;
  esac
done
shift $((OPTIND - 1))

if [ "$#" -le 1 ]; then
  printf "Must provide at least 2 arguments.\n" >&2
  printf "\n$usage";
  exit 1
fi

if ! [ -f "$1" ]; then
  printf "Environment file $1 does not exist.\n" >&2
  printf "\n$usage";
  exit 1
fi

source $1;

shift;

eval "$@";