#!/usr/bin/env bash
# Sync the published apt tree to Cloudflare R2 (served as apt.nucleic.blakeslee.xyz;
# NAROS.md §3.2).
# Uses rclone's S3 backend with env-provided credentials (CI secrets):
#   R2_ACCOUNT_ID, R2_ACCESS_KEY_ID, R2_SECRET_ACCESS_KEY, R2_BUCKET (default naros-apt)
#   R2_JURISDICTION (optional: default, eu, or fedramp)
set -euo pipefail

OS_DIR="$(cd "$(dirname "$0")/.." && pwd)"
REPO="$OS_DIR/dist/repo"
: "${R2_ACCOUNT_ID:?}" "${R2_ACCESS_KEY_ID:?}" "${R2_SECRET_ACCESS_KEY:?}"
BUCKET="${R2_BUCKET:-naros-apt}"
[ -d "$REPO" ] || { echo "no repo at $REPO — run repo/publish.sh first" >&2; exit 2; }

if [[ ! "$R2_ACCOUNT_ID" =~ ^[[:xdigit:]]{32}$ ]]; then
  echo "R2_ACCOUNT_ID must be the 32-character Cloudflare account ID" >&2
  exit 2
fi

case "${R2_JURISDICTION:-default}" in
  default) ENDPOINT="https://${R2_ACCOUNT_ID}.r2.cloudflarestorage.com" ;;
  eu|fedramp) ENDPOINT="https://${R2_ACCOUNT_ID}.${R2_JURISDICTION}.r2.cloudflarestorage.com" ;;
  *) echo "R2_JURISDICTION must be default, eu, or fedramp" >&2; exit 2 ;;
esac

# /dev/null is intentional: this remote is configured entirely through environment
# variables, so rclone must not search for (and warn about) rclone.conf.
export RCLONE_CONFIG=/dev/null \
       RCLONE_CONFIG_R2_TYPE=s3 \
       RCLONE_CONFIG_R2_PROVIDER=Cloudflare \
       RCLONE_CONFIG_R2_ACCESS_KEY_ID="$R2_ACCESS_KEY_ID" \
       RCLONE_CONFIG_R2_SECRET_ACCESS_KEY="$R2_SECRET_ACCESS_KEY" \
       RCLONE_CONFIG_R2_ENDPOINT="$ENDPOINT" \
       RCLONE_CONFIG_R2_REGION=auto \
       RCLONE_CONFIG_R2_ACL=private \
       RCLONE_CONFIG_R2_NO_CHECK_BUCKET=true

# pool/ first, dists/ last: clients never see an index referencing a not-yet-uploaded deb.
rclone copy "$REPO/pool" "r2:$BUCKET/pool" --checksum
rclone sync "$REPO/dists" "r2:$BUCKET/dists" --checksum
echo "synced $REPO -> r2:$BUCKET"