Script to create a yaml file from a set of environment vars

env2yml.sh

#!/bin/bash

set -e

usage() {
  echo ""
  echo "Usage: env2yml <source.env> <template.yml>"
  echo ""
  echo "Required:"
  echo "  - source.env .... file containing env vars to source"
  echo "  - template.yml .. yaml template file to interpolate into"
  echo ""
  exit 1
}

if [ -z "$1" ] || [ -z "$2" ]; then
  usage
fi
envs=$1
template=$2

source "$envs"

( echo "cat > final.yml <<EOF";
  cat "${template}";
  echo "EOF";
) >temp.yml
. temp.yml
cat final.yml

rm final.yml
rm temp.yml