#!/bin/sh

if [ ! -d "./BUILD" ]; then
	echo "Please run this script from the same level where the BUILD dir is contained"
	exit 1
fi

pushd $(ls -d BUILD/kernel-*/linux* | tail -n1)
cp -a $(ls ../../../SOURCES/defconfig-* | grep -v .sh$) .
first=1
for arch in x86_64 i386 arm64 arm; do
    for config in $(ls defconfig-$arch-* | grep -v .sh$); do
	echo "updating config: $config"
	mv $config .config
	yes '' | make oldconfig ARCH=$arch
	mv .config $config
	if [ $first == 1 ]; then
	    first=0
	    # First time reuse the selections from first one to avoid answering same questions many times
	    # This means ithe user needs to remember when something is specific to x86_64-desktop to disable it in others
	    for arch2 in x86_64 i386 arm64 arm; do
		for config2 in $(ls defconfig-$arch2-* | grep -v .sh$); do
		    [ "$config" != "$config2" ] && diff -u ../../../SOURCES/$config $config | sed -n 's/^\+//p'
		done
	    done
	fi
    done
done
cp -af $(ls defconfig-* | grep -v .sh$) ../../../SOURCES/
popd