#!/usr/bin/env bash
# Terraform external data source entrypoint. Stdout must be JSON only.
set -euo pipefail

ROOT="$(cd "$(dirname "$0")" && pwd)"
bash "${ROOT}/build_lambda.sh" >&2

if command -v sha256sum >/dev/null 2>&1; then
  SHA=(sha256sum)
else
  SHA=(shasum -a 256)
fi

hash="$(
  {
    find -P "${ROOT}/build/function" -type f -print0 2>/dev/null \
      | sort -z \
      | xargs -0 "${SHA[@]}"
  } | "${SHA[@]}" | awk '{print $1}'
)"

printf '{"status":"ok","hash":"%s"}\n' "${hash}"