From a0bd2b22b8db8e5d16333852467d07a1cf2f8c82 Mon Sep 17 00:00:00 2001
From: Jonathan Bauer
Date: Wed, 24 Apr 2013 17:15:47 +0200
Subject: compile kernel on the reference system with our config requirements

---
 remote/modules/kernel/.gitignore   |  5 ++-
 remote/modules/kernel/kernel.build | 81 ++++++++++++++++++++++++++++++++++++++
 remote/modules/kernel/kernel.conf  |  3 ++
 3 files changed, 87 insertions(+), 2 deletions(-)
 create mode 100644 remote/modules/kernel/kernel.build
 create mode 100644 remote/modules/kernel/kernel.conf

(limited to 'remote/modules/kernel')

diff --git a/remote/modules/kernel/.gitignore b/remote/modules/kernel/.gitignore
index 5e077cd8..56c69270 100644
--- a/remote/modules/kernel/.gitignore
+++ b/remote/modules/kernel/.gitignore
@@ -1,2 +1,3 @@
-ksrc/
-linux-*/
+ksrc
+linux*
+openslx.config
diff --git a/remote/modules/kernel/kernel.build b/remote/modules/kernel/kernel.build
new file mode 100644
index 00000000..8b238abf
--- /dev/null
+++ b/remote/modules/kernel/kernel.build
@@ -0,0 +1,81 @@
+fetch_source() {
+	# get the source according to the distro
+        if [ "x$PACKET_MANAGER" == "xapt" ]; then
+		pdebug "apt-ing kernel source"
+                apt-get source linux-image-${KERNEL_VERSION}
+		[ ! -e ksrc ] && ln -s  $(ls -d linux-*/) ksrc
+        elif [ "x$PACKET_MANAGER" == "xzypper" ]; then
+		pdebug "zypping kernel source"
+                zypper si kernel-source
+
+		# find src directory
+		local SOURCE_DIR=$(rpm -ql kernel-source |grep -E -o '^/.*src/linux-[^/]+/' |head -1)
+		[ -z "${SOURCE_DIR}" ] && perror "Could not determine directory of kernel source..."
+		ln -sf "${SOURCE_DIR}" ksrc
+		
+        else
+		pdebug "Packet manager not determined!"
+	fi
+}
+
+build() {
+	local TARGET_CONFIG_FILE="openslx.config"
+	[ -e "${TARGET_CONFIG_FILE}" ] && rm -f "${TARGET_CONFIG_FILE}"
+	# update config and copy to ksrc
+	pinfo "Updating kernel config..."
+	update_config
+	cp "${TARGET_CONFIG_FILE}" ksrc/.config
+	
+	# make kernel with the new config
+	cd ksrc || perror "Could not cd to ksrc, was the kernel source fetched properly?"
+	pinfo "Preparing kernel for new config ('make oldconfig')"
+	yes n | make oldconfig || perror "make oldconfig failed"
+	pinfo "Compiling kernel... (this will take some time)"
+	make || perror "make failed"
+	
+	# install modules to build directory
+	pinfo "Installing kernel modules..."
+	make INSTALL_MOD_PATH="${MODULE_BUILD_DIR}" INSTALL_MOD_STRIP=1 modules_install || perror "make modules_install failed in ${MODULE_BUILD_DIR}"
+	cd - 2> /dev/null
+
+	# copy kernel to build
+	cp ksrc/arch/x86/boot/bzImage "${MODULE_BUILD_DIR}/${KERNEL_TARGET_NAME}"
+	pinfo "Kernel was successfully built at ${MODULE_BUILD_DIR}/${KERNEL_TARGET_NAME}"
+	[ -z "${KERNEL_BUILD_DIR}" ] && KERNEL_BUILD_DIR="${MODULE_BUILD_DIR}"
+}
+
+post_copy() {
+	:
+}
+
+# helper function to update the current kernel config with our parameters
+update_config() {
+
+	# first we need to update the current config
+	local BASE_CONFIG_FILE="/boot/config-$(uname -r)"
+	[ -e "${BASE_CONFIG_FILE}" ] || perror "$BASE_CONFIG_FILE could not be found! This should not happen."
+	
+	# check for our wanted config parameter
+	local OPENSLX_WANTED_CONFIG="${ROOT_DIR}/data/kernel.wanted.config"
+	[ -e "${OPENSLX_WANTED_CONFIG}" ] || perror "$OPENSLX_WANTED_CONFIG does not exist! Please add a list of wanted kernel config parameters."
+
+	# copy basic config file
+	cp "$BASE_CONFIG_FILE" "$TARGET_CONFIG_FILE"
+
+	for WANTED_CONFIG in $(cat $OPENSLX_WANTED_CONFIG|sort -u); do
+		local CONFIG_PARAM_NAME=$(echo $WANTED_CONFIG | awk -F "=" '{print $1}')
+		local SEARCH_RESULT=$(grep "^$CONFIG_PARAM_NAME=" "$BASE_CONFIG_FILE")
+
+		#echo "Process: $SEARCH_RESULT"
+		# analyse results
+		if [ "x$SEARCH_RESULT" == "x" ]; then
+			# no match, add it
+			echo $WANTED_CONFIG >> $TARGET_CONFIG_FILE
+		else
+			# match, change to our setting if they differ
+			if [ "x${SEARCH_RESULT: -1}" != "x${WANTED_CONFIG: -1}" ]; then
+				sed -i "s/$SEARCH_RESULT/$WANTED_CONFIG/" "$TARGET_CONFIG_FILE"
+			fi
+		fi
+	done
+}
diff --git a/remote/modules/kernel/kernel.conf b/remote/modules/kernel/kernel.conf
new file mode 100644
index 00000000..0cd03752
--- /dev/null
+++ b/remote/modules/kernel/kernel.conf
@@ -0,0 +1,3 @@
+REQUIRED_BINARIES=""
+REQUIRED_LIBRARIES=""
+REQUIRED_DIRECTORIES=""
-- 
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