#!/usr/bin/env bash

set -euo pipefail

project_dir=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)
cilium_version=${CILIUM_VERSION:-1.20.0}
output=${1:?Usage: render.sh OUTPUT_FILE}

for command in curl helm; do
  if ! command -v "${command}" >/dev/null 2>&1; then
    echo "Required command not found: ${command}" >&2
    exit 1
  fi
done

chart=$(mktemp)
trap 'rm -f "${chart}"' EXIT

curl --fail --silent --show-error --location \
  --output "${chart}" \
  "https://helm.cilium.io/cilium-${cilium_version}.tgz"

helm template cilium "${chart}" \
  --namespace kube-system \
  --values "${project_dir}/values.yaml" \
  > "${output}"