#!/usr/bin/env bash
# Build + push the site image to the public Gitea registry using rootless buildah.
# Bootstrap path for M1-M4 (before the Gitea Actions runner exists in M5).
#
# Usage:  scripts/build-image.sh [push]
#   (no arg) -> build only
#   push     -> build then push, and print the pushed digest to pin in home-ops
#
# Requires: buildah (rootless) on the host, and `buildah login` to the registry
# for the push step (anonymous pull, authenticated push).
set -euo pipefail

REGISTRY="${REGISTRY:-git.bztmon.com}"
IMAGE="${IMAGE:-jwrong96/bztmon-site}"
REF="${REGISTRY}/${IMAGE}"

cd "$(dirname "$0")/.."

# Tag with the short git sha when available, else 'dev'.
TAG="$(git rev-parse --short HEAD 2>/dev/null || echo dev)"

echo ">> building ${REF}:${TAG}"
buildah build --layers -t "${REF}:${TAG}" -t "${REF}:latest" .

if [[ "${1:-}" == "push" ]]; then
  echo ">> pushing ${REF}:${TAG}"
  buildah push --digestfile /tmp/bztmon-site.digest "${REF}:${TAG}"
  buildah push "${REF}:latest"
  DIGEST="$(cat /tmp/bztmon-site.digest)"
  echo
  echo ">> pin this in home-ops kubernetes/apps/bztmon-site/bztmon-site.yaml:"
  echo "   image: ${REF}:${TAG}@${DIGEST}"
else
  echo ">> built (not pushed). Re-run with: scripts/build-image.sh push"
fi