_docker

#!/usr/bin/env bash
#
# This script intentionally echoes the exact Docker commands it runs.
# Seeing the full command string helps keep the workflow transparent
# and avoids the "black box" feeling of wrapper scripts.

set -euo pipefail
IFS=$'\n\t'

# Enable BuildKit for faster and more efficient Docker builds.
# First run: docker buildx install
export DOCKER_BUILDKIT=1

if [[ ! -f ".env" ]]; then
  echo "Missing .env file. Copy .env-template and configure required values." >&2
  exit 1
fi

if ! command -v docker >/dev/null 2>&1; then
  echo "Docker command not found. Install Docker and try again." >&2
  exit 1
fi

highlight() {
  printf '\033[1;36m%s\033[0m\n' "$1"
}

# shellcheck disable=SC1091
source .env

required_vars=(DOCKER_IMAGE_NAME DOCKER_IMAGE_TAG TF_VAR_NODE_VERSION TF_VAR_LAMBDA_RUNTIME TF_VAR_LAMBDA_ARCHITECTURE)
for var in "${required_vars[@]}"; do
  if [[ -z "${!var:-}" ]]; then
    echo "${var} must be set in .env" >&2
    exit 1
  fi
done

lambda_arch="${TF_VAR_LAMBDA_ARCHITECTURE}"
build_platform="linux/amd64"
if [[ "${lambda_arch}" == "arm64" ]]; then
  build_platform="linux/arm64"
fi

project_dir="$(pwd)"
build_cmd="docker build --platform ${build_platform} --build-arg NODE_VERSION=\"${TF_VAR_NODE_VERSION}\" --build-arg LAMBDA_RUNTIME=\"${TF_VAR_LAMBDA_RUNTIME}\" --tag \"${DOCKER_IMAGE_NAME}:${DOCKER_IMAGE_TAG}\" --file docker/Dockerfile ."
run_cmd="docker run --rm --memory=4g --platform ${build_platform} --volume \"${project_dir}:/app\" \"${DOCKER_IMAGE_NAME}:${DOCKER_IMAGE_TAG}\" /app/docker/build.sh"

echo "The .env file has been sourced. Do you wish to proceed with these docker commands:"
highlight "${build_cmd}"
echo ""
highlight "${run_cmd}"
echo

read -r -p "Continue? [y/N] " confirmation
case "${confirmation}" in
  [Yy]|[Yy][Ee][Ss]) ;;
  *) echo "Aborted."; exit 0 ;;
esac

highlight "Executing: ${build_cmd}"
eval "${build_cmd}"

highlight "Executing: ${run_cmd}"
eval "${run_cmd}"

if [[ -f "lambda.zip" ]]; then
  rm lambda.zip
fi

if [[ ! -f "lambda-deployment.zip" ]]; then
  echo "Expected lambda-deployment.zip was not generated." >&2
  exit 1
fi

mv lambda-deployment.zip lambda.zip
echo "Lambda package created at lambda.zip"