#!/bin/sh
set -e

B="$(dirname $0)"

if [ "$1" = "amd" ]; then
	BASE="archbase.config"
	CONFIG="overlay.config amd.config"
elif [ "$1" = "intel" ]; then
	BASE="archbase.config"
	CONFIG="overlay.config intel.config"
elif [ "$1" = "virt" ]; then
	BASE=""
	CONFIG="virt.config"
else
	BASE="archbase.config"
	CONFIG="overlay.config"
fi
#################################################################################

# First just deploy base configuration (provided or just kernel default)
if [ -z  "$BASE" ]; then
	make defconfig
else
	cp "$B/$BASE" .config
fi

# Apply changes in config
for CNF in $CONFIG; do
	while read L; do
		echo "$L" | grep -qE "^[[:space:]]*$" && continue # ignore empty lines
		echo "$L" | grep -qE "#.*" && continue # Ignore comments
		# Remove lines with changed settings
		sed -i "#^$(echo "$L" | grep -oE '^CONFIG_.*=')#d" .config
		# Put config
		echo "$L" >> .config
	done < "$B/$CNF"
done

# As next step run olddefconfig (note: stderr contains some output about overrided
# options so I am ignoring it)
make olddefconfig 2>/dev/null

# Now let's check that configuration
for CNF in $CONFIG; do
	EC=0
	while read L; do
		echo "$L" | grep -qE "^[[:space:]]*$" && continue # ignore empty lines
		echo "$L" | grep -qE "#.*" && continue # Ignore comments
		OPTION="$(echo "$L" | grep -oE '^CONFIG_.*=')"
		VALUE="$(echo "$L" | grep -oE '=.*$')"
		if [ "$VALUE" = "=n" ]; then
			# Handle =n and "not set" as being same
			if grep -qE "^$OPTION=y" .config; then
				EC=1
				echo -e "\e[1;31m$CNF:\e[0m$L"
			fi
		else
			if ! grep -qE "^$L$" .config; then
				EC=1
				echo -e "\e[1;31m$CNF:\e[0m$L"
			fi
		fi
	done < "$B/$CNF"
done

exit $EC