#!/bin/sh
# Print which of the relay vars are set, WITHOUT printing their values. Handy
# when a script dies with ":? not set" and you cannot tell which one.
for v in RELAY_ENDPOINT RELAY_USER RELAY_TOKEN CONTAINMENT_CODE; do
  eval "val=\${$v:-}"
  if [ -n "$val" ]; then echo "$v: set"; else echo "$v: MISSING"; fi
done