Source .env file into new shell

dotenv.sh

#!/bin/sh

function dotenv() {
  dotfile="${1:-.env}"

  # Error if file does not exist
  if ! [ -f $dotfile ] ; then
    echo "$dotfile: No such file or directory" >&2
    return 1
  fi

  # Log
  tput setaf 209 ; printf 'source '  >&2
  tput setaf 69  ; printf "$dotfile" >&2
  tput sgr0      ; echo              >&2

  # Open new shell
  $SHELL -c "set -o allexport ; source $dotfile ; set +o allexport ; $SHELL"
}

dotenv "$@"