ENVY - A poor man's dotenv

envy.sh

#!/bin/sh
usage="\e[44;1m ENVY \e[0m A poor man's dotenv for POSIX shells\n\n"

usage+="This script will \"source\" the provided .env file within a subshell, and then\n"
usage+="run the commands you pass within that subshell. This is a simple but effective way\n"
usage+="to get the basic advantages of dotenv in a shell. It uses a naive regexp to parse\n"
usage+="the provided .env, so it is not a full dotenv implementation.\n\n"
usage+="Usage: ./envy <dotenv> <commands>\n\n"

usage+="Options: \n"
usage+="  -d              Look for a .env in the current working directory\n"
usage+="\n"
usage+="Arguments: \n"
usage+="  <dotenv>        The path to your .env file\n"
usage+="  <commands>      The commands you want to run with the .env sourced\n\n"

_env=$1
_cmds=${@:2}

if [ -z "$_env" ] ||\
   [ "-h" =  "$_env" ] ||\
   [ "--help" = "$_env" ]; then
    printf "$usage"
    exit 1
fi

# flag that allows accepting the default ./.env file
if [ "-e" = $_env ]; then
    _env="./.env"
elif [ ! -f $_env ]; then
  printf "The environment file %s does not exist.\n\n" "$1"
  exit 1
fi

if ! command -v "$2" &> /dev/null
then
    printf "The command file %s does not exist.\n\n" "$2"
    exit 1
fi

(
  set -a
  echo "Sourcing: $_env"
  # shellcheck source=./.env
  . $_env;
  echo "Running: $_cmds"
  # shellcheck disable=SC2039
  eval "${@:2}"
  set +a
) 2>&1