[kernel] remember last built version and if new kernel is detected, ask what to do. WARNING: KVERSION file will be missing, write the old (uname -r) under remote/modules/ksrc/KVERSION to be safe :)

1 files changed, 37 insertions, 17 deletions

diff --git a/remote/setup_target b/remote/setup_target
index 1638f392..f5df66ad 100755
--- a/remote/setup_target
+++ b/remote/setup_target
@@ -227,6 +227,30 @@ generate_target() {
 	pinfo "Activated modules in '${TARGET}':"
 	pinfo "\t$(echo ${MODULES})"
 
+	# we need a bit of special logic for kernel specifically
+	# to check if the built version is corresponding to the
+	# current kernel version. If not we had a kernel update
+	# and need to ask the user what to do
+	if [[ "$MODULES" == *kernel* ]]; then
+		# if so, check what kernels have been built
+		if [ -e "${MODULES_DIR}/kernel/ksrc/KVERSION" ]; then
+			local BUILT_KERNEL_VERSION=$(cat "${MODULES_DIR}/kernel/ksrc/KVERSION")
+			if [[ "${BUILT_KERNEL_VERSION}" != "${KERNEL_CURRENT_VERSION}" ]]; then
+				pinfo "The built kernel (${BUILT_KERNEL_VERSION}) is older than the running one (${KERNEL_CURRENT_VERSION})!"
+				pinfo "Do you want to clean the old kernel and re-build for the new version? (Y/n)"
+				read USER_INPUT
+				if [ "x$USER_INPUT" == "xy" -o "x$USER_INPUT" == "xY" -o "x$USER_INPUT" == "x" ]; then
+					clean_kernel_module --force
+					# cleaning the module is enough as it forces to rebuild.
+				fi
+			fi
+		else
+			# KVERSION is not found.
+			pdebug "KVERSION not found under remote/modules/kernel/ksrc/KVERSION"
+			pdebug "Ignoring. If errors arise, either write your KVERSION manually or clean the kernel."
+		fi
+	fi
+
 	# copy basic libs
 	pinfo "Copying libc and ld-linux used by ${SHELL}"
 	tarcopy "$(list_basic_libs)" "${TARGET_BUILD_DIR}"
@@ -255,11 +279,6 @@ process_module() {
 	pinfo ">>>>>>>>>>>>>>>>> Processing module [ $MODULE ]"
 	TOOL_STR="[${MODULE}]"
 	if [ -d "${MODULE_DIR}" ]; then
-
-		#[ "x$DEBUG" != "x1" ] \
-		#	&& echo "Logging to ${TOOL_DIR}/${TOOL}/stage32.log" \
-		#	&& exec 6>&1 > ${TOOL_DIR}/${TOOL}/stage32.log
-		# TODO: Make above work with the new logging system (add function to logging.inc to switch logfile)
 		cd "${MODULE_DIR}" || perror "Module dir '${MODULE_DIR}' seems to exist, but cd to it failed."
 		pinfo "## Reading config"
 		read_config
@@ -299,10 +318,8 @@ process_module() {
 		copy_static_data
 		pinfo "## Post copy"
 		post_copy
-		# reset pipes
-		#[ "x$DEBUG" != "x1" ] && exec 1>&6 6>&- 
-		# TODO
-		calc_size #sets MODULE_BUILD_SIZE
+		# set MODULE_BUILD_SIZE
+		calc_size
 		pinfo "Module completed. Total size: ${MODULE_BUILD_SIZE}"
 	else
 		pwarning "Module directory for '$MODULE' not found."
@@ -310,10 +327,8 @@ process_module() {
 }
 
 post_process_target() {
-
 	local TOOL_STR="$TOOL_STR post_process_target:"
-
-	#move systemd files from /lib to /etc/lib
+	# move systemd files from /lib to /etc/lib
 	pinfo "move systemd files from /lib/systemd to /etc/systemd"
 	if [ -d "${TARGET_BUILD_DIR}/lib/systemd" ]; then
 		cd "${TARGET_BUILD_DIR}/lib"
@@ -404,12 +419,17 @@ clean_module() {
 }
 
 clean_kernel_module() {
+	local CLEAN=0
+	if [ "x$1" == "x--force" ]; then
+		CLEAN=1
+	else
+		pinfo "It will take a long time to rebuild, are you sure? [y/N]"
+		read USER_INPUT
+		[ "x$USER_INPUT" == "xy" ] && CLEAN=1
+	fi
+
 	pinfo "Cleaning kernel module (including sources and compiled stuff)."
-	pinfo "It will take a long time to rebuild, are you sure? [y/N]"
-	read USER_INPUT
-	if [ "x$USER_INPUT" == "xy" ]; then
-		pinfo "Confirmed, going on..."
-		# clean kernel module
+	if [[ $CLEAN == 1 ]]; then
 		cd "${TARGET_DIR}/kernel" || perror "Could not cd to ${TARGET_DIR}/kernel"
 		if [ -e build ]; then
 			rm -rf build || perror "Could not delete ${TARGET_DIR}/kernel/build"