build-image.sh

#!/bin/bash
# Copyright (C) 2021  optiMEAS GmbH. All rights reserved.
#
# SPDX-License-Identifier: GPL-2.0-only

set -ex

OPT_CREATE_COMPRESSED_IMAGE=0
OPT_INCREMENTAL_BUILD=0
while getopts "xif:d:" opt
do
    case $opt in
    x) OPT_CREATE_COMPRESSED_IMAGE=1;;
    i) OPT_INCREMENTAL_BUILD=1;;
    f) VMDB2_YAML_FILE=$(realpath "${OPTARG}") ;;
    d) OUTPUT_PATH=$(realpath "${OPTARG}") ;;
    esac
done


MYDIR="$(pwd)"

VMDB2_DIR="${MYDIR}/vmdb2"
VMDB2_LATEST_DIR="vmdb2-latest"

DEB_DIR="debian-packages"
VMDB2_YAML_FILE_WITHOUT_EXTENSION=$(basename "$VMDB2_YAML_FILE")
VMDB2_YAML_FILE_WITHOUT_EXTENSION="${VMDB2_YAML_FILE_WITHOUT_EXTENSION%.*}"

VMDB2_LOG_FILE="${OUTPUT_PATH}/${VMDB2_YAML_FILE_WITHOUT_EXTENSION}-$(date +"%Y_%m_%d__%H_%M_%S").log"
VMDB2_ROOTFS_CACHE_FILE="${OUTPUT_PATH}/${VMDB2_YAML_FILE_WITHOUT_EXTENSION}-rootfs-cache.tar.gz"
VMDB2_IMAGE_FILE="${OUTPUT_PATH}/${VMDB2_YAML_FILE_WITHOUT_EXTENSION}.img"
VMDB2_COMPRESSED_IMAGE_FILE="${VMDB2_IMAGE_FILE}.xz"

ROOTFS="${VMDB2_DIR}/rootfs"

if [ ! -d "$OUTPUT_PATH" ]; then
	echo "creating output directory $OUTPUT_PATH"
    mkdir "${OUTPUT_PATH}"
fi

cd "${VMDB2_DIR}"


if ! compgen -G "${DEB_DIR}/linux-image-*.deb" > /dev/null; then
    echo "downloading kernel"
    cd "${DEB_DIR}"
    
	wget https://buildserver.optimeas.de/artifacts/debian/linux-image-tx6-latest.deb
	
	cd "${VMDB2_DIR}"
fi

if [ ! -d ${VMDB2_LATEST_DIR} ]; then 
    git clone git://git.liw.fi/vmdb2 "${VMDB2_LATEST_DIR}"
    cd "${VMDB2_LATEST_DIR}"
    git reset --hard f2c2863f 

    cd "${VMDB2_DIR}"
fi

if [ $OPT_INCREMENTAL_BUILD = 0 ]; then
    [ -f "${VMDB2_ROOTFS_CACHE_FILE}" ] && rm -f "${VMDB2_ROOTFS_CACHE_FILE}"
fi

# generate imageinfo.txt for this build
BRANCHNAME=$(git symbolic-ref HEAD | awk -F'/' '{print $3}')
GITVERSION=$(git describe)
IMAGE_RELEASE=bullseye

BUILD_DATE=$(date -Iseconds)
IMAGE_NAME="vmdb2-${VMDB2_YAML_FILE_WITHOUT_EXTENSION}"
IMAGE_VERSION="debian-${IMAGE_RELEASE}-${BRANCHNAME}-${GITVERSION}"

echo -e "BUILD_DATE=${BUILD_DATE}
IMAGE=${IMAGE_NAME}
MACHINE=${MACHINE}
VERSION=${IMAGE_VERSION}
" > "${ROOTFS}/etc/imageinfo.txt"

# u-boot script creation
UBOOT_SCRIPT="${MYDIR}/scripts/u-boot.script"
SCRIPT_DEST_DIR="${MYDIR}/vmdb2/rootfs/boot"

mkimage -A arm -T "script" -C none -n "Boot Script" -d "${UBOOT_SCRIPT}" u-boot.scr
mkdir -p "${SCRIPT_DEST_DIR}"
rm -f "${SCRIPT_DEST_DIR}/u-boot.scr"
mv u-boot.scr "${SCRIPT_DEST_DIR}"

rm -f "${VMDB2_IMAGE_FILE}" "${VMDB2_COMPRESSED_IMAGE_FILE}"
time "${VMDB2_LATEST_DIR}/vmdb2" --verbose --rootfs-tarball="${VMDB2_ROOTFS_CACHE_FILE}" --output "${VMDB2_IMAGE_FILE}" "${VMDB2_YAML_FILE}" --log "${VMDB2_LOG_FILE}"

mv rootfs.tar "${OUTPUT_PATH}"


if [ $OPT_CREATE_COMPRESSED_IMAGE = 1 ]  ; then
    xz -k ${VMDB2_IMAGE_FILE}
fi