#!/bin/sh
  # Copyright (c) 2016 Google, Inc
  # Written by Simon Glass <sjg@chromium.org>
  #
  # Check that the u-boot.cfg file provided does not introduce any new
  # ad-hoc CONFIG options
  #

  # Use scripts/build-whitelist.sh to generate the list of current ad-hoc
  # CONFIG options (those which are not in Kconfig).

  
  # Usage
  #    check-config.sh <path to u-boot.cfg> <path to whitelist file> <source dir>
  #
  # For example:
  #   scripts/check-config.sh b/chromebook_link/u-boot.cfg kconfig_whitelist.txt .
  
  path="$1"
  whitelist="$2"
  srctree="$3"
  
  # Temporary files
  configs="${path}.configs"
  suspects="${path}.suspects"
  ok="${path}.ok"
  new_adhoc="${path}.adhoc"
  
  export LC_ALL=C
  export LC_COLLATE=C
  
  cat ${path} |sed -n 's/^#define \(CONFIG_[A-Za-z0-9_]*\).*/\1/p' |sort |uniq \
  	>${configs}
  
  comm -23 ${configs} ${whitelist} > ${suspects}
  
  cat `find ${srctree} -name "Kconfig*"` |sed -n \

  	-e 's/^\s*config *\([A-Za-z0-9_]*\).*$/CONFIG_\1/p' \
  	-e 's/^\s*menuconfig \([A-Za-z0-9_]*\).*$/CONFIG_\1/p' \
  	|sort |uniq > ${ok}

  comm -23 ${suspects} ${ok} >${new_adhoc}
  if [ -s ${new_adhoc} ]; then

  	echo >&2 "Error: You must add new CONFIG options using Kconfig"
  	echo >&2 "The following new ad-hoc CONFIG options were detected:"
  	cat >&2 ${new_adhoc}
  	echo >&2
  	echo >&2 "Please add these via Kconfig instead. Find a suitable Kconfig"
  	echo >&2 "file and add a 'config' or 'menuconfig' option."

  	# Don't delete the temporary files in case they are useful
  	exit 1
  else
  	rm ${suspects} ${ok} ${new_adhoc}
  fi