kas-container

#!/bin/sh
#
# kas - setup tool for bitbake based projects
#
# Copyright (c) Siemens AG, 2018-2022
#
# Authors:
#  Jan Kiszka <jan.kiszka@siemens.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

set -e

usage()
{
	SELF="${KAS_CONTAINER_SELF_NAME}"
	printf "%b" "Usage: ${SELF} [OPTIONS] { build | shell } [KASOPTIONS] [KASFILE]\n"
	printf "%b" "       ${SELF} [OPTIONS] { checkout | dump } [KASOPTIONS] [KASFILE]\n"
	printf "%b" "       ${SELF} [OPTIONS] for-all-repos [KASOPTIONS] [KASFILE] COMMAND\n"
	printf "%b" "       ${SELF} [OPTIONS] { clean | cleansstate | cleanall} [KASFILE]\n"
	printf "%b" "       ${SELF} [OPTIONS] menu [KCONFIG]\n"
	printf "%b" "\nPositional arguments:\n"
	printf "%b" "build\t\t\tCheck out repositories and build target.\n"
	printf "%b" "checkout\t\tCheck out repositories but do not build.\n"
	printf "%b" "dump\t\t\tCheck out repositories and write flat version\n"
	printf "%b" "    \t\t\tof config to stdout.\n"
	printf "%b" "shell\t\t\tRun a shell in the build environment.\n"
	printf "%b" "for-all-repos\t\tRun specified command in each repository.\n"
	printf "%b" "clean\t\t\tClean build artifacts, keep sstate cache and " \
		    "downloads.\n"
	printf "%b" "cleansstate\t\tClean build artifacts and sstate cache, " \
		    "keep downloads.\n"
	printf "%b" "cleanall\t\tClean build artifacts, sstate cache and " \
		    "downloads.\n"
	printf "%b" "menu\t\t\tProvide configuration menu and trigger " \
		    "configured build.\n"
	printf "%b" "\nOptional arguments:\n"
	printf "%b" "--isar\t\t\tUse kas-isar container to build Isar image.\n"
	printf "%b" "--with-loop-dev		Pass a loop device to the " \
		    "container. Only required if\n"
	printf "%b" "\t\t\tloop-mounting is used by recipes.\n"
	printf "%b" "--runtime-args\t\tAdditional arguments to pass to the " \
			"container runtime\n"
	printf "%b" "\t\t\tfor running the build.\n"
	printf "%b" "-d\t\t\tPrint debug output (deprecated, use -l debug).\n"
	printf "%b" "-l, --log-level\t\tSet log level (default=info).\n"
	printf "%b" "-v\t\t\tSame as -d (deprecated).\n"
	printf "%b" "--version\t\tprint program version.\n"
	printf "%b" "--ssh-dir\t\tDirectory containing SSH configurations.\n"
	printf "%b" "\t\t\tAvoid \$HOME/.ssh unless you fully trust the " \
		    "container.\n"
	printf "%b" "--ssh-agent\t\tForward ssh-agent socket to the container.\n"
	printf "%b" "--aws-dir\t\tDirectory containing AWScli configuration.\n"
	printf "%b" "--git-credential-store\tFile path to the git credential " \
		    "store\n"
	printf "%b" "--no-proxy-from-env\tDo not inherit proxy settings from " \
		    "environment.\n"
	printf "%b" "--repo-ro\t\tMount current repository read-only\n" \
		    "\t\t\t(default for build command)\n"
	printf "%b" "--repo-rw\t\tMount current repository writeable\n" \
		    "\t\t\t(default for shell command)\n"
	printf "%b" "\n"
	printf "%b" "You can force the use of podman over docker using " \
		    "KAS_CONTAINER_ENGINE=podman.\n"
	exit 1
}

fatal_error(){
	echo "${KAS_CONTAINER_SELF_NAME}: Error: $*" >&2
	exit 1
}

warning(){
	echo "${KAS_CONTAINER_SELF_NAME}: Warning: $*" >&2
}

trace()
{
	[ -n "${KAS_VERBOSE}" ] && echo "+ $*" >&2
	"$@"
}

enable_isar_mode() {
	if [ -n "${ISAR_MODE}" ]; then
		return
	fi
	ISAR_MODE=1

	KAS_CONTAINER_IMAGE_NAME_DEFAULT="kas-isar"
	KAS_ISAR_ARGS="--privileged"

	if [ "${KAS_CONTAINER_ENGINE}" = "podman" ]; then
		# sudo is needed for a privileged podman container
		KAS_CONTAINER_COMMAND="sudo --preserve-env ${KAS_CONTAINER_COMMAND}"
		# preserved user PATH may lack sbin needed by privileged podman
		export PATH="${PATH}:/usr/sbin"
	fi
}

enable_oe_mode() {
	if [ "${KAS_CONTAINER_ENGINE}" = "podman" ]; then
		# The container entry point expects that the current userid
		# calling "podman run" has a 1:1 mapping
		KAS_RUNTIME_ARGS="${KAS_RUNTIME_ARGS} --userns=keep-id"
	fi
}

run_clean() {
	if [ -n "${KAS_ISAR_ARGS}" ]; then
		# SC2086: Double quote to prevent globbing and word splitting.
		# shellcheck disable=2086
		trace ${KAS_CONTAINER_COMMAND} run -v "${KAS_BUILD_DIR}":/build:rw \
				--workdir=/build --rm ${KAS_ISAR_ARGS} \
				${KAS_CONTAINER_IMAGE} \
				sudo rm -rf tmp
	else
		trace rm -rf "${KAS_BUILD_DIR}"/tmp*
	fi

	if [ "$1" != "clean" ]; then
		SSTATE_DIR=${SSTATE_DIR:-${KAS_BUILD_DIR}/sstate-cache}
		trace rm -rf "${SSTATE_DIR}"

		if [ "$1" = "cleanall" ]; then
			DL_DIR=${DL_DIR:-${KAS_BUILD_DIR}/downloads}
			trace rm -rf "${DL_DIR}"
		fi
	fi
}

KAS_IMAGE_VERSION_DEFAULT="4.3.2"
KAS_CONTAINER_IMAGE_PATH_DEFAULT="ghcr.io/siemens/kas"
KAS_CONTAINER_IMAGE_NAME_DEFAULT="kas"
KAS_CONTAINER_SELF_NAME="$(basename "$0")"

set_container_image_var() {
	KAS_IMAGE_VERSION="${KAS_IMAGE_VERSION:-${KAS_IMAGE_VERSION_DEFAULT}}"
	KAS_CONTAINER_IMAGE_NAME="${KAS_CONTAINER_IMAGE_NAME:-${KAS_CONTAINER_IMAGE_NAME_DEFAULT}}"
	KAS_CONTAINER_IMAGE_PATH="${KAS_CONTAINER_IMAGE_PATH:-${KAS_CONTAINER_IMAGE_PATH_DEFAULT}}"
	KAS_CONTAINER_IMAGE_DEFAULT="${KAS_CONTAINER_IMAGE_PATH}/${KAS_CONTAINER_IMAGE_NAME}:${KAS_IMAGE_VERSION}"
	KAS_CONTAINER_IMAGE="${KAS_CONTAINER_IMAGE:-${KAS_CONTAINER_IMAGE_DEFAULT}}"
}

KAS_WORK_DIR=$(readlink -fv "${KAS_WORK_DIR:-$(pwd)}")
# KAS_WORK_DIR needs to exist for the subsequent code
trace mkdir -p "${KAS_WORK_DIR}"
KAS_BUILD_DIR=$(readlink -fv "${KAS_BUILD_DIR:-${KAS_WORK_DIR}/build}")
trace mkdir -p "${KAS_BUILD_DIR}"

KAS_CONTAINER_ENGINE="${KAS_CONTAINER_ENGINE:-${KAS_DOCKER_ENGINE}}"
if [ -z "${KAS_CONTAINER_ENGINE}" ]; then
	# Try to auto-detect a container engine
	if command -v docker >/dev/null; then
		case $(docker -v 2>/dev/null) in
		podman*)
			# The docker command is an alias for podman
			KAS_CONTAINER_ENGINE=podman
			;;
		Docker*)
			# The docker command is the real docker
			KAS_CONTAINER_ENGINE=docker
			;;
		*)
			# The docker command is an unknown engine
			fatal_error "docker command found, but unknown engine detected"
		esac
	elif command -v podman >/dev/null; then
		KAS_CONTAINER_ENGINE=podman
	else
		fatal_error "no container engine found, need docker or podman"
	fi
fi

KAS_RUNTIME_ARGS="--log-driver=none --user=root"

case "${KAS_CONTAINER_ENGINE}" in
docker)
	KAS_CONTAINER_COMMAND="docker"
	;;
podman)
	KAS_CONTAINER_COMMAND="podman"
	KAS_RUNTIME_ARGS="${KAS_RUNTIME_ARGS} --security-opt label=disable"
	;;
*)
	fatal_error "unknown container engine '${KAS_CONTAINER_ENGINE}'"
	;;
esac

# parse kas-container options
while [ $# -gt 0 ]; do
	case "$1" in
	--isar)
		enable_isar_mode
		shift 1
		;;
	--with-loop-dev)
		if ! KAS_LOOP_DEV=$(/sbin/losetup -f 2>/dev/null); then
			if [ "$(id -u)" -eq 0 ]; then
				fatal_error "loop device not available!"
			fi
			sudo_command="/sbin/losetup -f"
			sudo_message="[sudo] enter password to setup loop"
			sudo_message="$sudo_message devices by calling"
			sudo_message="$sudo_message '$sudo_command': "
			# SC2086: Double quote to prevent globbing and word splitting.
			# shellcheck disable=2086
			if ! KAS_LOOP_DEV=$(sudo -p "$sudo_message" $sudo_command \
				2>/dev/null); then
				fatal_error "loop device setup unsuccessful!" \
				            "try calling '$sudo_command' with root" \
				            "permissions manually."
			fi
		fi
		KAS_WITH_LOOP_DEV="--device ${KAS_LOOP_DEV}"
		shift 1
		;;
	--runtime-args|--docker-args)
		[ $# -gt 0 ] || usage
		KAS_RUNTIME_ARGS="${KAS_RUNTIME_ARGS} $2"
		shift 2
		;;
	--ssh-dir)
		[ $# -gt 2 ] || usage
		KAS_SSH_DIR="$2"
		shift 2
		;;
	--ssh-agent)
		if [ -z "${SSH_AUTH_SOCK}" ]; then
			fatal_error "no SSH agent running"
		fi
		KAS_SSH_AUTH_SOCK=$(readlink -fv "$SSH_AUTH_SOCK")
		shift 1
		;;
	--aws-dir)
		[ $# -gt 2 ] || usage
		KAS_AWS_DIR="$2"
		shift 2
		;;
	--git-credential-store)
		[ $# -gt 2 ] || usage
		KAS_GIT_CREDENTIAL_STORE="$2"
		shift 2
		;;
	--no-proxy-from-env)
		KAS_NO_PROXY_FROM_ENV=1
		shift 1
		;;
	--repo-ro)
		KAS_REPO_MOUNT_OPT="ro"
		shift 1
		;;
	--repo-rw)
		KAS_REPO_MOUNT_OPT="rw"
		shift 1
		;;
	-v | -d)
		KAS_VERBOSE=1
		KAS_OPTIONS_DIRECT="${KAS_OPTIONS_DIRECT} -d"
		shift 1
		;;
	-l | --log-level)
		if [ "$2" = "debug" ]; then
			KAS_VERBOSE=1
		fi
		KAS_OPTIONS_DIRECT="${KAS_OPTIONS_DIRECT} -l $2"
		shift 2
		;;
	--version)
		echo "${KAS_CONTAINER_SELF_NAME} $KAS_IMAGE_VERSION_DEFAULT"
		exit 0
		;;
	--*)
		usage
		;;
	clean|cleansstate|cleanall)
		KAS_CMD=$1
		shift 1
		break
		;;
	shell)
		KAS_REPO_MOUNT_OPT_DEFAULT="rw"
		KAS_CMD=$1
		shift 1
		break
		;;
	build|checkout|for-all-repos|menu)
		KAS_REPO_MOUNT_OPT_DEFAULT="ro"
		KAS_CMD=$1
		shift 1
		break
		;;
	dump)
		if printf '%s\0' "$@" | grep -xqz -- '--inplace\|-i'; then
			KAS_REPO_MOUNT_OPT_DEFAULT="rw"
		else
			KAS_REPO_MOUNT_OPT_DEFAULT="ro"
		fi
		KAS_CMD=$1
		shift 1
		break
		;;
	*)
		usage
		;;
	esac
done

[ -n "${KAS_CMD}" ] || usage

KAS_EXTRA_BITBAKE_ARGS=0

# parse kas sub-command options
while [ $# -gt 0 ] && [ $KAS_EXTRA_BITBAKE_ARGS -eq 0 ]; do
	case "$1" in
	--skip|--target|--task)
		KAS_OPTIONS="${KAS_OPTIONS} $1 $2"
		shift 2
		;;
	-c|--cmd|--command)
		KAS_BITBAKE_C_OPTION_ARGS="$2"
		shift 2
		;;
	-E|--preserve-env)
		fatal_error "$1 is not supported with ${KAS_CONTAINER_SELF_NAME}"
		;;
	--)
		KAS_EXTRA_BITBAKE_ARGS=$#
		;;
	-*)
		KAS_OPTIONS="${KAS_OPTIONS} $1"
		shift 1
		;;
	*)
		KAS_FILES=
		# SC2086: Double quote to prevent globbing and word splitting.
		# shellcheck disable=2086
		for FILE in $(IFS=':'; echo $1); do
			if ! KAS_REAL_FILE="$(realpath -qe "$FILE")"; then
				fatal_error "configuration file '${FILE}' not found"
			fi
			if [ -z "${KAS_FILES}" ]; then
				KAS_FIRST_FILE="${KAS_REAL_FILE}"
				KAS_FILES="${KAS_REAL_FILE}"
			else
				KAS_FILES="${KAS_FILES}:${KAS_REAL_FILE}"
			fi
		done
		shift 1
		if [ "$KAS_CMD" = "for-all-repos" ]; then
			KAS_REPO_CMD="$1"
			shift 1
		fi
		;;
	esac
done

if [ -n "${KAS_FIRST_FILE}" ]; then
	KAS_FILE_DIR="$(dirname "${KAS_FIRST_FILE}")"
	KAS_REPO_DIR=$(git -C "${KAS_FILE_DIR}" rev-parse --show-toplevel 2>/dev/null) \
		|| KAS_REPO_DIR=$(hg --cwd "${KAS_FILE_DIR}" root 2>/dev/null) \
		|| KAS_REPO_DIR=${KAS_FILE_DIR}
else
	KAS_REPO_DIR=$(pwd)
fi

SOURCE_DIR_HOST=$(
	grep -e "^_source_dir_host: " "${KAS_WORK_DIR}/.config.yaml" 2>/dev/null | \
	sed 's/_source_dir_host:[ ]\+//')
if [ -n "${SOURCE_DIR_HOST}" ]; then
	KAS_REPO_DIR="${SOURCE_DIR_HOST}"
fi

if [ "${KAS_CMD}" = "menu" ]; then
	if [ -z "${KAS_FIRST_FILE}" ]; then
		KAS_FIRST_FILE="Kconfig"
	fi

	# When using the menu plugin, we need to track the KAS_REPO_DIR outside
	# of the container to later allow a simple `kas-container build`. For
	# that, we tell the kas menu plugin via an env-var about the location
	# on the host. This data is then added to the .config.yaml where it can
	# be evaluated by the next invocation of kas-container.

	if ! [ "$(realpath -qe "${KAS_REPO_DIR}")" = "$(realpath -qe "${KAS_WORK_DIR}")" ]; then
		set -- "$@" -e _KAS_REPO_DIR_HOST="$(readlink -fv "${KAS_REPO_DIR}")"
	fi

	BUILD_SYSTEM=$(tr '\n' '\f' 2>/dev/null < "${KAS_FIRST_FILE}" | \
		sed -e 's/\(.*\fconfig KAS_BUILD_SYSTEM\f\(.*\)\|.*\)/\2/' \
		    -e 's/\f\([[:alpha:]].*\|$\)//' \
		    -e 's/.*default \"\(.*\)\".*/\1/')
else
	if [ -z "${KAS_FIRST_FILE}" ]; then
		KAS_FIRST_FILE="${KAS_WORK_DIR}/.config.yaml"
	fi

	BUILD_SYSTEM=$(grep -e "^build_system: " "${KAS_FIRST_FILE}" 2>/dev/null | \
		sed 's/build_system:[ ]\+//')
fi

if [ "${BUILD_SYSTEM}" = "isar" ]; then
	enable_isar_mode
elif [ -z "${ISAR_MODE}" ]; then
	enable_oe_mode
fi

set_container_image_var

# short circuit for clean* commands. We just need
# the build-system information, but no repo mounts, etc...
if echo "${KAS_CMD}" | grep -qe "^clean"; then
	run_clean "${KAS_CMD}"
	exit 0
fi

KAS_REPO_MOUNT_OPT="${KAS_REPO_MOUNT_OPT:-${KAS_REPO_MOUNT_OPT_DEFAULT}}"

KAS_FILES="$(echo "${KAS_FILES}" | sed 's|'"${KAS_REPO_DIR}"'/|/repo/|g')"

if [ "$(id -u)" -eq 0 ] && [ "${KAS_ALLOW_ROOT}" != "yes" ] ; then
	fatal_error "Running as root - may break certain recipes." \
	            "Better give a regular user docker access. Set" \
	            "KAS_ALLOW_ROOT=yes to override."
fi

set -- "$@" -v "${KAS_REPO_DIR}:/repo:${KAS_REPO_MOUNT_OPT}" \
	-v "${KAS_WORK_DIR}":/work:rw -e KAS_WORK_DIR=/work \
	-v "${KAS_BUILD_DIR}":/build:rw \
	--workdir=/repo \
	-e KAS_BUILD_DIR=/build \
	-e USER_ID="$(id -u)" -e GROUP_ID="$(id -g)" --rm --init

if [ -n "${KAS_SSH_DIR}" ] ; then
	if [ ! -d "${KAS_SSH_DIR}" ]; then
		fatal_error "passed KAS_SSH_DIR '${KAS_SSH_DIR}' is not a directory"
	fi
	set -- "$@" -v "$(readlink -fv "${KAS_SSH_DIR}")":/var/kas/userdata/.ssh:ro
fi

if [ -n "${KAS_SSH_AUTH_SOCK}" ]; then
	if [ ! -S "${KAS_SSH_AUTH_SOCK}" ]; then
		fatal_error "passed SSH_AUTH_SOCK '${KAS_SSH_AUTH_SOCK}' is not a socket"
	fi
	set -- "$@" -v "${KAS_SSH_AUTH_SOCK}":/ssh-agent/ssh-auth-sock \
		-e SSH_AUTH_SOCK=/ssh-agent/ssh-auth-sock
fi

if [ -n "${KAS_AWS_DIR}" ] ; then
	if [ ! -d "${KAS_AWS_DIR}" ]; then
		fatal_error "passed KAS_AWS_DIR '${KAS_AWS_DIR}' is not a directory"
	fi
	set -- "$@" -v "$(readlink -fv "${KAS_AWS_DIR}")":/var/kas/userdata/.aws:ro \
		-e AWS_CONFIG_FILE="${AWS_CONFIG_FILE:-/var/kas/userdata/.aws/config}" \
		-e AWS_SHARED_CREDENTIALS_FILE="${AWS_SHARED_CREDENTIALS_FILE:-/var/kas/userdata/.aws/credentials}"
fi
if [ -n "${AWS_WEB_IDENTITY_TOKEN_FILE}" ] ; then
	if [ ! -f "${AWS_WEB_IDENTITY_TOKEN_FILE}" ]; then
		echo "Passed AWS_WEB_IDENTITY_TOKEN_FILE '${AWS_WEB_IDENTITY_TOKEN_FILE}' is not a directory"
		exit 1
	fi
	set -- "$@" -v "$(readlink -fv "${AWS_WEB_IDENTITY_TOKEN_FILE}")":/var/kas/userdata/.aws/web_identity_token:ro \
		-e AWS_WEB_IDENTITY_TOKEN_FILE="${AWS_CONFIG_FILE:-/var/kas/userdata/.aws/web_identity_token}" \
		-e AWS_ROLE_ARN="${AWS_ROLE_ARN}"
fi

KAS_GIT_CREDENTIAL_HELPER_DEFAULT=""

if [ -n "${KAS_GIT_CREDENTIAL_STORE}" ] ; then
	if [ ! -f "${KAS_GIT_CREDENTIAL_STORE}" ]; then
		fatal_error "passed KAS_GIT_CREDENTIAL_STORE '${KAS_GIT_CREDENTIAL_STORE}' is not a file"
	fi
	KAS_GIT_CREDENTIAL_HELPER_DEFAULT="store --file=/var/kas/userdata/.git-credentials"
	set -- "$@" -v "$(readlink -fv "${KAS_GIT_CREDENTIAL_STORE}")":/var/kas/userdata/.git-credentials:ro
fi

GIT_CREDENTIAL_HELPER="${GIT_CREDENTIAL_HELPER:-${KAS_GIT_CREDENTIAL_HELPER_DEFAULT}}"

if [ -n "${GIT_CREDENTIAL_HELPER}" ] ; then
	set -- "$@" -e GIT_CREDENTIAL_HELPER="${GIT_CREDENTIAL_HELPER}"
fi

if [ -f "${NETRC_FILE}" ]; then
	set -- "$@" -v "$(readlink -fv "${NETRC_FILE}")":/var/kas/userdata/.netrc:ro \
		-e NETRC_FILE="/var/kas/userdata/.netrc"
fi

if [ -f "${GITCONFIG_FILE}" ]; then
	set -- "$@" -v "$(readlink -fv "${GITCONFIG_FILE}")":/var/kas/userdata/.gitconfig:ro \
		-e GITCONFIG_FILE="/var/kas/userdata/.gitconfig"
fi

if [ -t 1 ]; then
	set -- "$@" -t -i
fi

if [ -n "${DL_DIR}" ]; then
	trace mkdir -p "${DL_DIR}"
	set -- "$@" \
		-v "$(readlink -fv "${DL_DIR}")":/downloads:rw \
		-e DL_DIR=/downloads
fi

if [ -n "${SSTATE_DIR}" ]; then
	trace mkdir -p "${SSTATE_DIR}"
	set -- "$@" \
		-v "$(readlink -fv "${SSTATE_DIR}")":/sstate:rw \
		-e SSTATE_DIR=/sstate
fi
if [ -n "${SSTATE_MIRRORS}" ]; then
	if echo "${SSTATE_MIRRORS}" | grep -q "file:///"; then
		warning "SSTATE_MIRRORS contains a local path." \
		        "Make sure to make this path available inside the container."
	fi
	set -- "$@" -e "SSTATE_MIRRORS=${SSTATE_MIRRORS}"
fi

if [ -n "${KAS_REPO_REF_DIR}" ]; then
	if [ ! -d "${KAS_REPO_REF_DIR}" ]; then
		fatal_error "Passed KAS_REPO_REF_DIR '${KAS_REPO_REF_DIR}' is not a directory"
	fi
	set -- "$@" \
		-v "$(readlink -fv "${KAS_REPO_REF_DIR}")":/repo-ref:rw \
		-e KAS_REPO_REF_DIR=/repo-ref
fi

for var in TERM KAS_DISTRO KAS_MACHINE KAS_TARGET KAS_TASK \
           KAS_PREMIRRORS DISTRO_APT_PREMIRRORS BB_NUMBER_THREADS PARALLEL_MAKE \
           GIT_CREDENTIAL_USEHTTPPATH; do
	if [ -n "$(eval echo \$${var})" ]; then
		set -- "$@" -e "${var}=$(eval echo \"\$${var}\")"
	fi
done

# propagate only supported SHELL settings
case "$SHELL" in
/bin/sh|/bin/bash|/bin/dash)
	set -- "$@" -e "SHELL=$SHELL"
	;;
*)
	set -- "$@" -e "SHELL=/bin/bash"
	;;
esac

if [ -z "${KAS_NO_PROXY_FROM_ENV+x}" ]; then
	for var in http_proxy https_proxy ftp_proxy no_proxy NO_PROXY; do
		if [ -n "$(eval echo \$${var})" ]; then
			set -- "$@" -e "${var}=$(eval echo \$${var})"
		fi
	done
fi

# SC2086: Double quote to prevent globbing and word splitting.
# shellcheck disable=2086
set -- "$@" ${KAS_ISAR_ARGS} ${KAS_WITH_LOOP_DEV} ${KAS_RUNTIME_ARGS} \
    ${KAS_CONTAINER_IMAGE} ${KAS_OPTIONS_DIRECT} ${KAS_CMD} ${KAS_OPTIONS}
if [ -n "${KAS_BITBAKE_C_OPTION_ARGS}" ]; then
	set -- "$@" -c "${KAS_BITBAKE_C_OPTION_ARGS}"
fi
# SC2086: Double quote to prevent globbing and word splitting.
# shellcheck disable=2086
set -- "$@" ${KAS_FILES}
if [ "$KAS_CMD" = "for-all-repos" ]; then
	set -- "$@" "${KAS_REPO_CMD}"
fi

# rotate any extra bitbake args from the front to the end of the argument list
while [ $KAS_EXTRA_BITBAKE_ARGS -gt 0 ]; do
	arg="$1"
	shift 1
	set -- "$@" "$arg"
	KAS_EXTRA_BITBAKE_ARGS=$((KAS_EXTRA_BITBAKE_ARGS - 1))
done

# shellcheck disable=SC2086
trace ${KAS_CONTAINER_COMMAND} run "$@"