kumquat-buildroot/board/raspberrypi/post-image.sh
Peter Korsgaard e37ee5acdc board/raspberrypi/post-image.sh: generate genimage config from template if not present
The rpi genimage configurations are all identical, except for the boot
partition files, which include:

- Device tree files (*.dtb)
- rpi-firmware files (rpi-firmware/*)
- Kernel image (Image/zImage)

All of these are quite simple to figure out programmatically based on the
content of BINARIES_DIR, so extend post-image.sh to fall back to generating
a genimage configuration based on genimage.cfg.in if a board specific one
does not exist.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2023-09-29 09:11:49 +02:00

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#!/bin/bash
set -e
BOARD_DIR="$(dirname $0)"
BOARD_NAME="$(basename ${BOARD_DIR})"
GENIMAGE_CFG="${BOARD_DIR}/genimage-${BOARD_NAME}.cfg"
GENIMAGE_TMP="${BUILD_DIR}/genimage.tmp"
# generate genimage from template if a board specific variant doesn't exists
if [ ! -e "${GENIMAGE_CFG}" ]; then
GENIMAGE_CFG="${BINARIES_DIR}/genimage.cfg"
FILES=()
for i in "${BINARIES_DIR}"/*.dtb "${BINARIES_DIR}"/rpi-firmware/*; do
FILES+=( "${i#${BINARIES_DIR}/}" )
done
KERNEL=$(sed -n 's/^kernel=//p' "${BINARIES_DIR}/rpi-firmware/config.txt")
FILES+=( "${KERNEL}" )
BOOT_FILES=$(printf '\\t\\t\\t"%s",\\n' "${FILES[@]}")
sed "s|#BOOT_FILES#|${BOOT_FILES}|" "${BOARD_DIR}/genimage.cfg.in" \
> "${GENIMAGE_CFG}"
fi
# Pass an empty rootpath. genimage makes a full copy of the given rootpath to
# ${GENIMAGE_TMP}/root so passing TARGET_DIR would be a waste of time and disk
# space. We don't rely on genimage to build the rootfs image, just to insert a
# pre-built one in the disk image.
trap 'rm -rf "${ROOTPATH_TMP}"' EXIT
ROOTPATH_TMP="$(mktemp -d)"
rm -rf "${GENIMAGE_TMP}"
genimage \
--rootpath "${ROOTPATH_TMP}" \
--tmppath "${GENIMAGE_TMP}" \
--inputpath "${BINARIES_DIR}" \
--outputpath "${BINARIES_DIR}" \
--config "${GENIMAGE_CFG}"
exit $?