add initial loong64 support

lib/functions/compilation/kernel-debs.sh

@@ -385,6 +385,7 @@ function kernel_package_callback_linux_headers() {
 	[[ "${SRC_ARCH}" == "amd64" ]] && SRC_ARCH="x86"
 	[[ "${SRC_ARCH}" == "armhf" ]] && SRC_ARCH="arm"
 	[[ "${SRC_ARCH}" == "riscv64" ]] && SRC_ARCH="riscv"
+	[[ "${SRC_ARCH}" == "loong64" ]] && SRC_ARCH="loongarch"
 	# @TODO: added KERNEL_SRC_ARCH to each arch'es .config file; let's make sure they're sane. Just use KERNEL_SRC_ARCH after confirmed.
 	# Lets check and warn if it isn't. If warns don't popup over time we remove and just use ARCHITECTURE later.
 	if [[ "${SRC_ARCH}" != "${KERNEL_SRC_ARCH}" ]]; then

lib/functions/configuration/main-config.sh

@@ -318,7 +318,8 @@ function do_main_configuration() {
 	esac
 
         # enable APA extension for Debian Unstable release
-        [ "$RELEASE" = "sid" ] && enable_extension "apa"
+	# loong64 is not supported now
+        [ "$RELEASE" = "sid" ] && [ "$ARCH" != "loong64" ] && enable_extension "apa"
 
 	## Extensions: at this point we've sourced all the config files that will be used,
 	##             and (hopefully) not yet invoked any extension methods. So this is the perfect
@@ -370,6 +371,8 @@ function do_extra_configuration() {
 	fi
 
 	DEBIAN_MIRROR='deb.debian.org/debian'
+	# loong64 is using debian-ports repo now
+	[[ "${ARCH}" == "loong64" ]] && DEBIAN_MIRROR='deb.debian.org/debian-ports'
 	DEBIAN_SECURITY='security.debian.org/'
 	[[ "${ARCH}" == "amd64" ]] &&
 		UBUNTU_MIRROR='archive.ubuntu.com/ubuntu/' ||

lib/functions/general/apt-utils.sh

@@ -39,6 +39,8 @@ function apt_find_upstream_package_version_and_download_url() {
 	fi
 
 	declare base_down_url="http://${mirror_with_slash}pool/main/${first_letter_of_sought_package_name}/${sought_package_name}"
+	# loong64 is using debian-ports repo, and download from pool-loong64
+	[[ "${ARCH}" == "loong64" ]] && declare base_down_url="http://${mirror_with_slash}pool-loong64/main/${first_letter_of_sought_package_name}/${sought_package_name}"
 
 	# get json with latest pacakge info generated by GHA
 	case "${GITHUB_MIRROR}" in

lib/functions/general/oci-oras.sh

@@ -52,6 +52,11 @@ function run_tool_oras() {
 			ORAS_ARCH="riscv64"
 			ORAS_VERSION="1.2.0-beta.1" # Only v1.2.0-beta.1+ has risv64 support
 			;;
+		*loongarch64*)
+			ORAS_ARCH="loong64"
+			ORAS_VERSION="1.3.0-beta.3-loong64" # Only v1.3.0-beta.3-loong64+ has loong64 support
+			ORAS_REPO="amazingfate" # This is my fork repo, we can delete it if oras releases official loong64 binary in the future
+			;;
 		*)
 			exit_with_error "unknown arch: $MACHINE"
 			;;
@@ -59,7 +64,7 @@ function run_tool_oras() {
 
 	declare ORAS_FN="oras_${ORAS_VERSION}_${ORAS_OS}_${ORAS_ARCH}"
 	declare ORAS_FN_TARXZ="${ORAS_FN}.tar.gz"
-	declare DOWN_URL="${GITHUB_SOURCE:-"https://github.com"}/oras-project/oras/releases/download/v${ORAS_VERSION}/${ORAS_FN_TARXZ}"
+	declare DOWN_URL="${GITHUB_SOURCE:-"https://github.com"}/${ORAS_REPO:-"oras-project"}/oras/releases/download/v${ORAS_VERSION}/${ORAS_FN_TARXZ}"
 	declare ORAS_BIN="${DIR_ORAS}/${ORAS_FN}"
 	declare ACTUAL_VERSION
 

lib/functions/general/shellcheck.sh

@@ -92,6 +92,11 @@ function run_tool_shellcheck() {
 			display_alert "No RISC-V riscv64 support for SHELLCHECK" "SHELLCHECK will not run" "wrn"
 			return 0
 			;;
+		*loongarch64*)
+			# check https://github.com/koalaman/shellcheck in the future, build might be possible
+			display_alert "No LoongArch support for SHELLCHECK" "SHELLCHECK will not run" "wrn"
+			return 0
+			;;
 		*)
 			exit_with_error "unknown arch: $MACHINE"
 			;;

lib/functions/host/host-release.sh

@@ -18,7 +18,7 @@ function obtain_and_check_host_release_and_arch() {
 
 	case "${HOSTARCH}" in
 		amd64 | arm64) ;; # officially supported
-		armhf | riscv64)  # experimental
+		armhf | riscv64 | loong64)  # experimental
 			display_alert "EXPERIMENTAL build host support" "${HOSTARCH}" "wrn"
 			;;
 		*)

lib/functions/host/prepare-host.sh

@@ -269,6 +269,11 @@ function adaptative_prepare_host_dependencies() {
 		host_dependencies+=("debian-archive-keyring")
 	fi
 
+	if [[ "${wanted_arch}" == "loong64" || "${wanted_arch}" == "all" ]]; then
+		host_dependencies+=("gcc-loongarch64-linux-gnu") # crossbuild-essential-loongarch64 is not even available "yet"
+		host_dependencies+=("debian-ports-archive-keyring")
+	fi
+
 	if [[ "${wanted_arch}" != "amd64" ]]; then
 		host_dependencies+=("libc6-amd64-cross") # Support for running x86 binaries (under qemu on other arches)
 	fi

lib/functions/rootfs/distro-specific.sh

@@ -121,13 +121,19 @@ function create_sources_list_and_deploy_repo_key() {
 		sid | unstable)
 			distro="debian"
 
+			if [[ "${ARCH}" == loong64 ]]; then
+				# loong64 is using debian-ports repo, we can change it to default after debian supports it officially
+				keyring_filename=/usr/share/keyrings/debian-ports-archive-keyring.gpg
+			else
+				keyring_filename=/usr/share/keyrings/debian-archive-keyring.gpg
+			fi
 			# sid is permanent unstable development and has no such thing as updates or security
 			cat <<- EOF > "${basedir}/etc/apt/sources.list.d/${distro}.sources"
 			Types: deb
 			URIs: http://${DEBIAN_MIRROR}
 			Suites: ${release}
 			Components: main contrib non-free non-free-firmware
-			Signed-By: /usr/share/keyrings/debian-archive-keyring.gpg
+			Signed-By: ${keyring_filename}
 			EOF
 
 			# Required for some packages on riscv64.

lib/functions/rootfs/rootfs-create.sh

@@ -98,6 +98,8 @@ function create_new_rootfs_cache_via_debootstrap() {
 		"'--components=${AGGREGATED_DEBOOTSTRAP_COMPONENTS_COMMA}'" # from aggregation.py
 	)
 
+	# This is necessary to debootstrap from a non-official repo
+	[[ $ARCH == loong64 ]] && deboostrap_arguments+=("--keyring=/usr/share/keyrings/debian-ports-archive-keyring.gpg")
 	# Small detour for local apt caching option.
 	local_apt_deb_cache_prepare "before debootstrap" # sets LOCAL_APT_CACHE_INFO
 	if [[ "${LOCAL_APT_CACHE_INFO[USE]}" == "yes" ]]; then