#!/bin/sh
# rfs mount firmware flist over /lib/firmware (plain S3 route inside the .fl)
# Looks for firmware-latest.fl in known locations; can be overridden via FIRMWARE_FLIST env

set -eu

log() { echo "[rfs-firmware] $*"; }

RFS_BIN="${RFS_BIN:-rfs}"
TARGET="/lib/firmware"
BASE_URL="${FLISTS_BASE_URL:-https://zos.grid.tf/store/flists}"

# Allow override via env
if [ -n "${FIRMWARE_FLIST:-}" ] && [ -f "${FIRMWARE_FLIST}" ]; then
  FL="${FIRMWARE_FLIST}"
else
  # Candidate paths for the flist manifest
  for p in \
    /etc/rfs/firmware-latest.fl \
    /var/lib/rfs/firmware-latest.fl \
    /root/firmware-latest.fl \
    /firmware-latest.fl \
    ; do
    if [ -f "$p" ]; then
      FL="$p"
      break
    fi
  done
fi

if [ -z "${FL:-}" ]; then
  # Try remote fetch as a fallback
  mkdir -p /etc/rfs
  FL="/etc/rfs/firmware-latest.fl"
  URL="${BASE_URL}/firmware-latest.fl"
  log "firmware-latest.fl not found locally; fetching ${URL}"

  if command -v wget >/dev/null 2>&1; then
    wget -q -O "${FL}" "${URL}" || true
  elif command -v busybox >/dev/null 2>&1; then
    busybox wget -q -O "${FL}" "${URL}" || true
  else
    log "no wget available to fetch ${URL}"
  fi

  if [ ! -s "${FL}" ]; then
    log "failed to fetch ${URL}; skipping mount"
    exit 0
  fi
fi

# Ensure target directory exists
mkdir -p "$TARGET"

# Skip if already mounted
if mountpoint -q "$TARGET" 2>/dev/null; then
  log "already mounted: $TARGET"
  exit 0
fi

# Perform the mount
log "mounting ${FL} -> ${TARGET}"
exec "$RFS_BIN" mount -m "$FL" "$TARGET"