#!/bin/sh
#############################################################################
#
#	This script gets called in two ways,  the first is to set the
#	default config up.  The second "final" pass is to save any settings
#	back to the vendors directory for permanent inclusion.
#
#	Copyright (C) 2001       Lineo    <davidm@snapgear.com>
#	Copyright (C) 2001-2002  SnapGear <davidm@snapgear.com>
#
#############################################################################
#
# Some basic starting points
#

CONFIG=.config
if [ -f ./.oldconfig ]
then
	. ./.oldconfig
fi

PASS="$1"
VENDOR=""
PRODUCT=""
LINUXDIR=""
LIBCDIR=""
LIBCBASEDIR=""

#############################################################################
#
# this code closely matches that in mkconfig,  it has to !
#

get_kernel()
{
	KERNEL="`grep '^CONFIG_DEFAULTS_KERNEL_.*=y' ${CONFIG}`"
	if [ -z "${KERNEL}" ]; then
		return 1
	fi
	KERNEL=${KERNEL##CONFIG_DEFAULTS_KERNEL_}
	KERNEL=${KERNEL%%=y}
	KERNEL="`echo ${KERNEL} | sed -e 's/_/./g'`"
	# the old behaviour
	[ -d linux-${KERNEL} ] || KERNEL="${KERNEL}.x"
	return 0
}

var_isset() # because of make evironment inheritance,  we must look in the file
{
	if grep "$1=y" $CONFIG > /dev/null
	then
		return 0
	fi
	return 1
}

fix_name()
{
	echo $1 | tr '[\-\.\/\+a-z]' '[____A-Z]'
}

#
# remove line containing $1 append line $2 to file in $3
#
replace_line()
{
	TMPR="/tmp/setconfig.$$"
	if [ -f "$3" ]
	then
		cat "$3" | grep -v "$1" > "$TMPR"
	else
		touch "$TMPR"
	fi
	echo "$2" >> "$TMPR"
	cp "$TMPR" "$3"
	rm -f "$TMPR"
}

fix_conf_files()
{
	#
	# add some bits for convienence, must be done after each stage
	#

	replace_line CONFIG_VENDOR= "CONFIG_VENDOR=$VENDOR"       .config
	replace_line CONFIG_PRODUCT= "CONFIG_PRODUCT=$PRODUCT"    .config
	replace_line CONFIG_LINUXDIR= "CONFIG_LINUXDIR=$LINUXDIR" .config
	replace_line CONFIG_LIBCDIR= "CONFIG_LIBCDIR=$LIBCDIR"    .config

	replace_line CONFIG_VENDOR "#define CONFIG_VENDOR \"$VENDOR\"" \
		 autoconf.h
	replace_line CONFIG_PRODUCT "#define CONFIG_PRODUCT \"$PRODUCT\"" \
		 autoconf.h
	replace_line CONFIG_LINUXDIR "#define CONFIG_LINUXDIR \"$LINUXDIR\"" \
		 autoconf.h
	replace_line CONFIG_LIBCDIR "#define CONFIG_LIBCDIR \"$LIBCDIR\"" \
		 autoconf.h
	replace_line VENDORS_AUTOCONF_INCLUDED \
		 "#define VENDORS_AUTOCONF_INCLUDED" autoconf.h
	replace_line "#undef AUTOCONF_INCLUDED" "#undef AUTOCONF_INCLUDED" \
		 autoconf.h

	replace_line OLD_VENDOR   "OLD_VENDOR=\"$VENDOR\""   ./.oldconfig
	replace_line OLD_PRODUCT  "OLD_PRODUCT=\"$PRODUCT\"" ./.oldconfig
	replace_line OLD_LINUXDIR "OLD_LINUXDIR=\"$LINUXDIR\"" ./.oldconfig
	replace_line OLD_LIBCDIR  "OLD_LIBCDIR=\"$LIBCDIR\"" ./.oldconfig
}

#############################################################################

for i in vendors/*/*/config.arch
do
	IFS=/
	set -- $i
	IFS=" 
	"
	VDIR="`dirname $i`"
	if [ -f "$VDIR/config.languages" ]
	then
		for j in `cat "$VDIR/config.languages"`
		do
			if var_isset "CONFIG_DEFAULTS_`fix_name $2`_`fix_name $3`_`fix_name $j`"
			then
				VENDOR="$2"
				PRODUCT="$3"
				break 2
			fi
		done
	fi
	if var_isset "CONFIG_DEFAULTS_`fix_name $2`_`fix_name $3`"
	then
		VENDOR="$2"
		PRODUCT="$3"
		break
	fi
done

#############################################################################

if [ "$VENDOR$PRODUCT" = "" ]; then
	echo "You have not selected a Vendor/Product in the config." >&2
	exit 1
fi

#############################################################################
#
# kernel version
#

# get_kernel defines KERNEL for us
if get_kernel; then
	LINUXDIR="linux-${KERNEL}"
else
	echo "Unknown kernel configuration." >&2
	exit 1
fi

if [ ! -d ${LINUXDIR} ]; then
	echo "Missing kernel directory ${LINUXDIR}." >&2
	exit 1
fi

#############################################################################
#
# libc verions (uC-libc is a special case to prevent confusion)
#

for i in uC-libc uClibc uClibc-* glibc glibc-*
do
	if var_isset "CONFIG_DEFAULTS_LIBC_`fix_name $i`"
	then
		LIBCNAME="`echo ${i} | sed 's/-[0-9].*$//g'`"
		LIBCBASEDIR=${i}
		case "$i" in
		None)    LIBCDIR=""; LIBCBASEDIR="$LIBCDIR" ;;
		uC-libc) LIBCDIR="libc"; LIBCBASEDIR="$LIBCDIR" ;;
		*)       LIBCDIR="$LIBCBASEDIR" ;;
		esac
		break
	fi
done

#############################################################################
#
# Now install the configs,  careful not dump on them unless they asked us to
#

if [ "$PASS" != "final" ]; then

	#
	# if the user touches any important settings then force a clean
	# otherwise bad things can happen in the tree
	#
	if [ "$OLD_PRODUCT$OLD_VENDOR$OLD_LINUXDIR$OLD_LIBCDIR" != \
			"$PRODUCT$VENDOR$LINUXDIR$LIBCDIR" ]; then
		if [ -f .oldconfig ]; then
			cp .config .config.save
			cp .oldconfig .config
			echo; echo; echo; echo
			if [ $NO_CLEAN ]
			then
				echo "**** Not cleaning tree ****"
				echo; echo; echo; echo
				sleep 3;
			else
				echo "**** Cleaning tree for old settings ****"
				echo "rm -rf romfs; make clean > /dev/null 2>&1"
				echo; echo; echo; echo
				rm -rf romfs
				make clean > /dev/null 2>&1
			fi
			cp .config.save .config
			rm -f .config.save

			[ "$LIBCDIR" ] && rm -f $LIBCDIR/.config
			rm -f $LINUXDIR/.config
			rm -f config/.config
			rm -f config.arch
			[ ! -d modules ] || rm -f modules/.config
		fi
	fi

    # once before the oldconfig stuff is run
	fix_conf_files

	rm -f config.arch
	ln -s "vendors/$VENDOR/$PRODUCT/config.arch" config.arch

	# make sure any auto config files are created now !
	make -C config VENDOR="$VENDOR" PRODUCT="$PRODUCT" autoconf

	if [ ! -f $LINUXDIR/.config ] || var_isset CONFIG_DEFAULTS_OVERRIDE; then
		ARCH=$(echo -e "e:\\n\\t@echo \$(ARCH)\\ninclude config.arch" | \
		       ROOTDIR=$PWD make --no-print-directory -s -f - 2>/dev/null)
		if [ -f "vendors/$VENDOR/$PRODUCT/config.$LINUXDIR" ]; then
			cp "vendors/$VENDOR/$PRODUCT/config.$LINUXDIR" $LINUXDIR/.config
		elif [ -f "vendors/$VENDOR/$PRODUCT/config.linux" ]; then
			cp "vendors/$VENDOR/$PRODUCT/config.linux" $LINUXDIR/.config

		elif [ -f "$LINUXDIR/arch/$ARCH/configs/${PRODUCT}_defconfig" ]; then
			cp "$LINUXDIR/arch/$ARCH/configs/${PRODUCT}_defconfig" $LINUXDIR/.config
		else
			echo; echo; echo; echo
			echo "*********************** NOTICE ****************************"
			echo "There is no preset config for $LINUXDIR on platform $VENDOR/$PRODUCT." 
			echo "If you choose to continue you will have to setup a linux"
			echo "config from scratch which is a very complex task."
			echo "You will find it easier if you can copy a config.$LINUXDIR"
			echo "from another platform that is similar."
			echo
			echo "If you know what you are doing press <ENTER> otherwise"
			echo "Type ^C to abort."
			read dummy
		fi
		make oldconfig_linux
	fi

	#
	# everything about modules is optional,  optional modules dir
	# and optional modules config files
	#
	if [ -d modules ]; then
		TMP=`expr $LINUXDIR : "[^-][^-]*\(-.*\)"`
		if [ -f "vendors/$VENDOR/$PRODUCT/config.modules$TMP" ]
		then
			TMP="vendors/$VENDOR/$PRODUCT/config.modules$TMP"
		else
			TMP="vendors/$VENDOR/$PRODUCT/config.modules"
		fi
		if [ ! -f modules/.config ] || var_isset CONFIG_DEFAULTS_OVERRIDE; then
			if [ -f "$TMP" ]; then
				cp "$TMP" modules/.config
			fi
			make oldconfig_modules
		fi
	fi

	if [ ! -f config/.config ] || var_isset CONFIG_DEFAULTS_OVERRIDE; then
		TMP=`expr $LINUXDIR : "[^-][^-]*\(-.*\)"`
		if [ -f "vendors/$VENDOR/$PRODUCT/config.vendor$TMP" ]
		then
			cp "vendors/$VENDOR/$PRODUCT/config.vendor$TMP" config/.config
		elif [ -f "vendors/$VENDOR/$PRODUCT/config.vendor" ]
		then
			cp "vendors/$VENDOR/$PRODUCT/config.vendor" config/.config
		else
			echo; echo; echo; echo
			echo "*********************** NOTICE ****************************"
			echo "There is no preset config for applications on platform $VENDOR/$PRODUCT." 
			echo "If you choose to continue you will have to setup your"
			echo "application config from scratch.  You will find it easier"
			echo "if you can copy a config.vendor file from another platform"
			echo "that is similar."
			echo
			echo "If you press <ENTER> you will be forced into the application"
			echo "config screen as part of the config process."
			echo "You may type ^C to abort."
			read dummy
			#
			# force config of user apps
			#
			replace_line CONFIG_DEFAULTS_VENDOR= \
					"CONFIG_DEFAULTS_VENDOR=y" .config
		fi
		make oldconfig_config
	fi

	if [ -L lib/$LIBCBASEDIR ]; then
		rm -f lib/$LIBCBASEDIR
	fi

	if [ ! -e lib/$LIBCBASEDIR -a -e $LIBCBASEDIR/. ] ; then
		ln -s "`pwd`/$LIBCBASEDIR" "lib/$LIBCBASEDIR"
	fi

	case "$LIBCBASEDIR" in
	uClibc*)
		if [ ! -f lib/$LIBCDIR/.config ] || var_isset CONFIG_DEFAULTS_OVERRIDE; then
			TMP=`expr $LINUXDIR : "[^-][^-]*\(-.*\)"`
			if [ -f "vendors/$VENDOR/$PRODUCT/config.$LIBCBASEDIR$TMP" ]; then
				cp "vendors/$VENDOR/$PRODUCT/config.$LIBCBASEDIR$TMP" \
						lib/$LIBCDIR/.config
			elif [ -f "vendors/$VENDOR/$PRODUCT/config.$LIBCNAME$TMP" ]; then
				cp "vendors/$VENDOR/$PRODUCT/config.$LIBCNAME$TMP" \
						lib/$LIBCDIR/.config
			elif [ -f "vendors/$VENDOR/$PRODUCT/config.$LIBCBASEDIR" ]; then
				cp "vendors/$VENDOR/$PRODUCT/config.$LIBCBASEDIR" \
						lib/$LIBCDIR/.config
			elif [ -f "vendors/$VENDOR/$PRODUCT/config.$LIBCNAME" ]; then
				cp "vendors/$VENDOR/$PRODUCT/config.$LIBCNAME" \
						lib/$LIBCDIR/.config
			else
				echo; echo; echo; echo
				echo "********************** NOTICE ***************************"
				echo "There is no preset config for $LIBCBASEDIR on platform" 
				echo "$VENDOR/$PRODUCT.  $LIBCBASEDIR cannot build without this."
				echo "You should copy a config.$LIBCBASEDIR from another"
				echo "target that is similar to yours to your chosen"
				echo "vendor/../.. directory and check that it is correct."
				echo
				echo "Once you have done that start the config process again."
				exit 1
			fi
			make oldconfig_uClibc
		fi
		;;
	esac

	# and once after to clean up
	fix_conf_files
fi

#############################################################################
#
# The override config option is always turned off when we are done so that
# someone doesn't get all upset that they lost their config files.
#
# Always add the VENDOR/PRODUCT dir for the build to work
#

if [ "$PASS" = "final" ]; then

	fix_conf_files

	#
	# check for other config options
	#

	if var_isset CONFIG_DEFAULTS_OVERRIDE; then
		sed 's/^\(CONFIG_DEFAULTS_OVERRIDE\)=y/# \1 is not set/' < .config \
				> .config.tmp
		cp .config.tmp .config
		rm -f .config.tmp
	fi

	if var_isset CONFIG_DEFAULTS_VENDOR_UPDATE; then

		if [ -f "vendors/$VENDOR/$PRODUCT/config.$LINUXDIR" ]
		then
			cp $LINUXDIR/.config "vendors/$VENDOR/$PRODUCT/config.$LINUXDIR"
		else
			cp $LINUXDIR/.config "vendors/$VENDOR/$PRODUCT/config.linux"
		fi
		TMP=`expr $LINUXDIR : "[^-][^-]*\(-.*\)"`
		if [ -f "vendors/$VENDOR/$PRODUCT/config.vendor$TMP" ]
		then
			cp config/.config "vendors/$VENDOR/$PRODUCT/config.vendor$TMP"
		else
			cp config/.config "vendors/$VENDOR/$PRODUCT/config.vendor"
		fi
		if [ -f modules/.config ]; then
			if [ -f "vendors/$VENDOR/$PRODUCT/config.modules$TMP" ]
			then
				cp modules/.config "vendors/$VENDOR/$PRODUCT/config.modules$TMP"
			else
				cp modules/.config "vendors/$VENDOR/$PRODUCT/config.modules"
			fi
		fi
		if [ -f "$LIBCDIR/.config" ]; then
			if [ "$LIBCBASEDIR" = "$LIBCNAME" ]; then
				if [ -f "vendors/$VENDOR/$PRODUCT/config.$LIBCNAME$TMP" ]; then
					cp $LIBCDIR/.config "vendors/$VENDOR/$PRODUCT/config.$LIBCNAME$TMP"
				else
					cp $LIBCDIR/.config "vendors/$VENDOR/$PRODUCT/config.$LIBCNAME"
				fi
			else
				if [ -f "vendors/$VENDOR/$PRODUCT/config.$LIBCBASEDIR$TMP" ]; then
					cp $LIBCDIR/.config "vendors/$VENDOR/$PRODUCT/config.$LIBCBASEDIR$TMP"
				else
					cp $LIBCDIR/.config "vendors/$VENDOR/$PRODUCT/config.$LIBCBASEDIR"
				fi
			fi
		fi

		sed 's/^\(CONFIG_DEFAULTS_VENDOR_UPDATE\)=y/# \1 is not set/' <.config\
				> .config.tmp
		cp .config.tmp .config
		rm -f .config.tmp

		if [ -f "vendors/$VENDOR/$PRODUCT/config.device" ]
		then
			cp .config "vendors/$VENDOR/$PRODUCT/config.device"
		fi
	fi

	grep -v CONFIG_DEFAULTS_VENDOR= < .config | \
		grep -v CONFIG_DEFAULTS_MODULES= | \
		grep -v CONFIG_DEFAULTS_KERNEL= > .config.tmp

	cp .config.tmp .config
	rm -f .config.tmp
fi

#############################################################################
exit 0