creat_defconfig.sh

if [ $# -ne 6 ]
then
	echo "useage: $0 kernel_arch target_product qcom_defconfig kernel_defconfig diff kernel_path"
	exit -1
fi

echo =======================================
echo =======start creat defconfig ==========
echo =======================================
#echo $#
#echo $@

config_path="$6/arch/$1/configs"
diff_config=$config_path"/"$5
#diff_config=$config_path"/"$2"_diff"
qcom_config=$config_path"/"$3
defconfig=$config_path"/"$4

echo config_path=$config_path
echo diff_config=$diff_config
echo qcom_config=$qcom_config
echo defconfig=$defconfig

if [ ! -e $qcom_config ]
then
	echo error: $qcom_config not exist
	exit -1
fi

if [ -e $defconfig ]
then
	echo $defconfig exist,must delete
	rm $defconfig
fi

if [ ! -e $diff_config ]
then
	echo $diff_config not exist,creat a new diff config
	echo "#diff config for $2" >$diff_config
fi


# we only support 3 format item in diff file
# 1. not '#' head and include '='
# 2. '#' head and end of " is not set"
# 3. '-' head
# if this 3 format item in diff file ,and still in qcom defconfig
# we must delete the item in qcom defconfig

cp $qcom_config temp0
cat $diff_config | while read line
do
#	if [[ ("$line" != '#'*) && ("$line" == *'='*) ]]
#	if [[ ("$line" != '#'*) && ("$line" != '@'*) && ("$line" == *'='*) ]]
	if [[ ("$line" != '#'*) && ("$line" != '-'*) && ("$line" == *'='*) ]]
	then
		config_name=${line%%=*}
#		echo $config_name
	elif [[ ("$line" == "# CONFIG"*) && ("$line" == *" is not set") ]]
	then
		config_name=${line:0:0-11}
		config_name=${config_name:2}
#		echo not set: $config_name
#	elif [[ ("$line" == '#'*) && ("$line" == *"=default_value") ]]
#	elif [[ ("$line" == '@'*) && ("$line" == *"=default_value") ]]
	elif [[ "$line" == '-'* ]]
	then
#		config_name=${line##*#}
#		config_name=${line##*@}
		config_name=${line##*-}
		config_name=${config_name%%=*}
#		echo del @: $config_name
	else
		continue
	fi

	sort_string=$config_name'='
	sed '/'"$sort_string"'/'d temp0 > temp1
	mv temp1 temp0

	sort_string=$config_name" is not set"
	sed '/'"$sort_string"'/'d temp0 > temp1
	mv temp1 temp0
done

mv temp0 $defconfig
echo merge the $diff_config to $defconfig
#echo '#diff config' > temp0
#when copy diff to defconfig we will skip the line of head is '@'
cat $diff_config | while read line
do
#	if [[ "$line" == '@'* ]]
	if [[ "$line" == '-'* ]]
	then
		continue
	fi

	echo $line >> $defconfig
done

#cat $diff_config >> $defconfig