#!/bin/sh
# rfs mount modules flist over /lib/modules/$(uname -r) (plain S3 route embedded in the .fl)
# Looks for modules-$(uname -r).fl in known locations; can be overridden via MODULES_FLIST env.

set -eu

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

RFS_BIN="${RFS_BIN:-rfs}"
KVER="$(uname -r)"
TARGET="/lib/modules/${KVER}"

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

if [ -z "${FL:-}" ]; then
  log "modules-${KVER}.fl not found in known paths; skipping mount"
  exit 0
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"