mkramdisk

#! /usr/bin/env bash
# $1=model $2=version $3=config
MODEL="$1"
VER="$2"
CONFIG="$3"
shift 3
MV=${MODEL}_${VER}
SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}"  )" && pwd  )"
ROOT=$(dirname ${SCRIPT_DIR})
OUTDIR=$ROOT/build/$MV
PREFIX_PATH=$ROOT/install/$MV
SRCDIR=$ROOT/linux
WORKDIR=$ROOT/$MV
NEWRD=$WORKDIR/ramdisk


mkdir -p $OUTDIR
mkdir -p $PREFIX_PATH
mkdir -p $WORKDIR
mkdir -p $NEWRD

# 3rd party prebuilt modules
UPDATE_MOD_PATH=$ROOT/3rdparty/$MV/modules
UPDATE_FW_PATH=$ROOT/3rdparty/$MV/firmware
# from synology rootfs
RELEASE_MOD_PATH=$ROOT/rootfs/$MV/lib/modules
RELEASE_FW_PATH=$ROOT/rootfs/$MV/lib/firmware
# synology rd.gz
RAMDISK_MOD_PATH=$ROOT/ramdisk/$MV/lib/modules
RAMDISK_FW_PATH=$ROOT/ramdisk/$MV/lib/firmware
# built with beta source
BETA_MOD_PATH=$ROOT/install/$MV/lib/modules
BETA_FW_PATH=$ROOT/install/$MV/lib/firmware

TOOL_PATH=$ROOT/tool
TOOLCHAIN=$ROOT/toolchain/$MV/x86_64-pc-linux-gnu
cat  $SRCDIR/synoconfigs/$CONFIG $WORKDIR/config.override > $OUTDIR/.config
export CROSS_COMPILE=${TOOLCHAIN}/bin/x86_64-pc-linux-gnu-
#cat $WORKDIR/config.override >> $OUTDIR/.config

if [ "x$1" = "xmenuconfig" ]; then
	make -C $SRCDIR O=$OUTDIR menuconfig
	exit 0
fi

if [ "x$1" = "xsavedefconfig" ]; then
	make -C $SRCDIR O=$OUTDIR savedefconfig
	cp $OUTDIR/defconfig .
	exit 0
fi

make -C $SRCDIR O=$OUTDIR oldconfig

if [ "x$1" = "xpass" ]; then
	shift
	make -C $SRCDIR O=$OUTDIR $@
	exit 0
fi

if [ "x$1" = "xsymbol" ]; then
	make -C $SRCDIR O=$OUTDIR -j5 bzImage EXTRA_CFLAGS=-g
	exit 0
fi

if [ "x$1" = "xkernel"  -o "x$1" = "xall" ]; then
	make -C $SRCDIR O=$OUTDIR -j5 bzImage
	exit 0
fi

mkdir -p $NEWRD/usr/sbin
mkdir -p $NEWRD/usr/bin
mkdir -p $NEWRD/etc

InstallFirmware()
{
	local fw="$1"
	local fwbase=$(basename $fw)
	local update=$(find $UPDATE_FW_PATH -name $fwbase -type f | fgrep "$fw")
	local release=$(find $RELEASE_FW_PATH -name $fwbase -type f | fgrep "$fw")
	local ramdisk=$(find $RAMDISK_FW_PATH -name $fwbase -type f | fgrep "$fw")
	local beta=$(find $BETA_FW_PATH -name $fwbase -type f | fgrep "$fw")
	local src=""
	[ -z "$src" -a -n "$update" ] && src="$update"
	[ -z "$src" -a -n "$release" -a -z "$ramdisk" ] && src="$release";
	[ -z "$src" -a -n "$ramdisk" ] && src="nop";
	[ -z "$src" -a -n "$beta" ] && src="$beta";
	[ -z "$src" ] && echo "$fw not found any where"
	if [ -n "$src" -a "x$src" != "xnop" ]; then
		install -DTm 0755 "$src" "$NEWRD/usr/lib/firmware/$fw"
	else
		return 1
	fi
}

InstallModule()
{
	local mod="$1"
	local update=$(find $UPDATE_MOD_PATH -name  ${mod}.ko)
	local release=$(find $RELEASE_MOD_PATH -name  ${mod}.ko)
	local ramdisk=$(find $RAMDISK_MOD_PATH -name  ${mod}.ko)
	local beta=$(find $BETA_MOD_PATH -name  ${mod}.ko)
	local src=""
	[ -z "$src" -a -n "$update" ] && src="$update"
	[ -z "$src" -a -n "$release" -a -z "$ramdisk" ] && src="$release";
	[ -z "$src" -a -n "$ramdisk" ] && src="nop";
	[ -z "$src" -a -n "$beta" ] && src="$beta";
	[ -z "$src" ] && echo "$mod not found any where"
	if [ -n "$src" -a "x$src" != "xnop" ]; then
		install -DTm 0644 "$src" "$NEWRD/usr/lib/modules/${mod}.ko"
		for fw in $(modinfo $src |grep ^firmware | cut -d: -f2); do
			if InstallFirmware $fw; then
				[ -n  "$firmwares" ] && firmwares="$firmwares "
				firmwares="$firmwares$fw"
			fi
		done
	fi
}

if [ "x$1" = "xmodule" -o "x$1" = "xall" -o "x$1" = "x" ]; then
	make -C $SRCDIR O=$OUTDIR -j5 modules
	make -C $SRCDIR INSTALL_MOD_PATH=$PREFIX_PATH O=$OUTDIR -j5 modules_install
	make -C $SRCDIR INSTALL_MOD_PATH=$PREFIX_PATH O=$OUTDIR -j5 firmware_install

	firmwares=""

	source $WORKDIR/modules.conf

	#disk modules are loaded early
	for mod in $DISK_MODULES $EXTRA_MODULES $OPTIONAL_MODULES; do
		InstallModule $mod
	done

	echo 'EXTRA_MODULES="'$EXTRA_MODULES'"' > $NEWRD/etc/rc.modules
	echo 'DISK_MODULES="'$DISK_MODULES'"' >> $NEWRD/etc/rc.modules
	echo 'EXTRA_FIRMWARES="'$firmwares'"' >> $NEWRD/etc/rc.modules
fi

if [ "x$1" = "xtool" -o "x$1" = "xall" -o "x$1" = "x" ]; then
	make -C $SRCDIR O=$OUTDIR M=$TOOL_PATH
	make -C $TOOL_PATH
	cp -a $TOOL_PATH/modprobe  $NEWRD/usr/sbin/
fi

if [ "x$1" = "xoverlay" ]; then
	cp $WORKDIR/vmlinux.bin ${OUTDIR}/arch/x86/boot/compressed/vmlinux.bin
	$SCRIPT_DIR/genzImage
	exit 0
fi

cp $SCRIPT_DIR/patch $NEWRD/usr/bin/
cp $SCRIPT_DIR/init $NEWRD/
git -C $ROOT/ramdisk/$MV diff baseline > $NEWRD/etc/jun.patch
#single core machine may suffer a text busy issue due to fd lazy close during initramfs populating
pushd $NEWRD
(find . -name modprobe && find . \! -name modprobe) | cpio --owner root:root -oH newc | lzma -9 > $WORKDIR/jun.lzma
popd