#!/bin/sh
# post_image.sh - Common post-image script for Raspberry Pi
#
# Called by Buildroot after filesystem images (ext4, etc.) are generated.
# Arguments:
#   $1 = path to the images directory (e.g., output/images)
#
# Environment:
#   BR2_EXTERNAL_RPI_COMMON_PATH = path to this external tree
#   BINARIES_DIR                 = same as $1
#   BUILD_DIR                    = path to the build directory
#
# This script uses genimage to assemble the final SD card image
# from the boot files and root filesystem.

set -e

BOARD_DIR="${BR2_EXTERNAL_RPI_COMMON_PATH}/board/raspberrypi"

# Use project-specific genimage.cfg if it exists, otherwise use common one.
# Projects can override by setting GENIMAGE_CFG in their own post-image script.
GENIMAGE_CFG="${GENIMAGE_CFG:-${BOARD_DIR}/genimage.cfg}"

# genimage requires a temporary directory
GENIMAGE_TMP="${BUILD_DIR}/genimage.tmp"
rm -rf "${GENIMAGE_TMP}"

genimage \
    --rootpath "${TARGET_DIR}" \
    --tmppath "${GENIMAGE_TMP}" \
    --inputpath "${BINARIES_DIR}" \
    --outputpath "${BINARIES_DIR}" \
    --config "${GENIMAGE_CFG}"

echo ">>> SD card image generated: ${BINARIES_DIR}/sdcard.img"