#!/usr/bin/env bash

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
OUTPUT_PATH="${1:-${SCRIPT_DIR}/upgrade-package.zip}"
SIGNATURE_PATH="${SCRIPT_DIR}/signature.sig"

if [[ ! -f "${SIGNATURE_PATH}" ]]; then
  echo "missing signature file: ${SIGNATURE_PATH}" >&2
  echo "generate a real signature.sig for manifest.json before building the package" >&2
  exit 1
fi

tmpdir="$(mktemp -d)"
trap 'rm -rf "${tmpdir}"' EXIT

cp "${SCRIPT_DIR}/manifest.json" "${tmpdir}/manifest.json"
cp "${SIGNATURE_PATH}" "${tmpdir}/signature.sig"
cp -R "${SCRIPT_DIR}/payload" "${tmpdir}/payload"

rm -f "${OUTPUT_PATH}"
(
  cd "${tmpdir}"
  zip -rq "${OUTPUT_PATH}" manifest.json signature.sig payload
)

echo "package built: ${OUTPUT_PATH}"