kernel_config

#!/bin/sh

set -eu

readonly CONFIG="$1"

cp "$CONFIG" .config
make olddefconfig

fail=false
while read line
do
	line_without_leading_spaces="$(echo $line)"
	[ "$line_without_leading_spaces" = '' ] && continue
	[ "$(echo "$line_without_leading_spaces" | cut -c 1)" = '#' ] && continue

	option="${line%%=*}"
	case "$line" in
		$option=n) line_match="$(printf "$line\n# $option is not set")";;
		$option=*) line_match="$line";;
	esac

	if ! grep -qF "$line_match" .config
	then
		echo "missing $line in resulting config"
		fail=true
	fi

done < "$CONFIG"

if $fail
then
	exit 1
fi