The first two statements of your BASH script should be

jjgreen · on April 15, 2020

  #!/bin/sh
  # don't need bash for this

linsomniac · on April 15, 2020

  /bin/dash: 2: set: Illegal option -o pipefail

gjvc · on April 15, 2020

Space between "#!" and the path lets the text breathe :-)

    #! /usr/bin/env bash
    set -euo pipefail

linsomniac · on April 15, 2020

A couple years ago I switched to doing "set -eu" in all my shell scripts and have been quite happy with it. While developing the script I'll also often add "set -xv" for debugging.