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

if [ $# -eq 0 ]; then
    echo "Usage: gen-env.sh <service.yml>"
    exit 1
fi

PREFIX="homelab"
out=""

for var in $(sed -n 's/.*\${{\([A-Z_]*\)}}.*/\1/p' "$1" | grep -v OVERLAY_NETWORK | sort -u); do
    val=$(pass "$PREFIX/$var" 2>/dev/null) || continue
    out+="$var=$val "
done

echo "$out"