#!/bin/sh
  # Copyright (c) 2016 Google, Inc
  # Written by Simon Glass <sjg@chromium.org>
  #
  
  # This script creates the configuration whitelist file. This file contains
  # all the config options which are allowed to be used outside Kconfig.
  # Please do not add things to the whitelist. Instead, add your new option
  # to Kconfig.
  #
  export LC_ALL=C LC_COLLATE=C
  
  # There are two independent greps. The first pulls out the component parts
  # of CONFIG_SYS_EXTRA_OPTIONS. An example is:
  #

  #	SUN7I_GMAC,AHCI,SATAPWR=SUNXI_GPB(8)

  #
  # We want this to produce:

  #	CONFIG_SUN7I_GMAC

  #	CONFIG_AHCI
  #	CONFIG_SATAPWR
  #
  # The second looks for the rest of the CONFIG options, but excludes those in
  # Kconfig and defconfig files.
  #
  (
  git grep CONFIG_SYS_EXTRA_OPTIONS |sed -n \
  	's/.*CONFIG_SYS_EXTRA_OPTIONS="\(.*\)"/\1/ p' \
  	| tr , '
  ' \
  	| sed 's/ *\([A-Za-z0-9_]*\).*/CONFIG_\1/'
  
  git grep CONFIG_ | \
  	egrep -vi "(Kconfig:|defconfig:|README|\.py|\.pl:)" \
  	| tr ' \t' '
  
  ' \
  	| sed -n 's/^\(CONFIG_[A-Za-z0-9_]*\).*/\1/p'
  ) \
  	|sort |uniq >scripts/config_whitelist.txt.tmp1;
  
  # Finally, we need a list of the valid Kconfig options to exclude these from
  # the whitelist.
  cat `find . -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 >scripts/config_whitelist.txt.tmp2
  
  # Use only the options that are present in the first file but not the second.
  comm -23 scripts/config_whitelist.txt.tmp1 scripts/config_whitelist.txt.tmp2 \

  	|sort |uniq >scripts/config_whitelist.txt.tmp3
  
  # If scripts/config_whitelist.txt already exists, take the intersection of the
  # current list and the new one.  We do not want to increase whitelist options.
  if [ -r scripts/config_whitelist.txt ]; then
  	comm -12 scripts/config_whitelist.txt.tmp3 scripts/config_whitelist.txt \
  		> scripts/config_whitelist.txt.tmp4
  	mv scripts/config_whitelist.txt.tmp4 scripts/config_whitelist.txt
  else
  	mv scripts/config_whitelist.txt.tmp3 scripts/config_whitelist.txt
  fi
  
  rm scripts/config_whitelist.txt.tmp*

  
  unset LC_ALL LC_COLLATE