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#!/bin/bash
#
# Copyright 2021 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# Taken from U-Boot and modified.
# This grubby little script creates the list of allowed configurations. This
# file contains all the config options which are allowed to be used outside
# Kconfig. Please do not add things to the list. Instead, add your new option to
# Kconfig.
#
# Usage:
# build_allowed.sh [-u]
#
# -u : Update the existing allowed file
export LC_ALL=C LC_COLLATE=C
# Current list of allowed ad-hoc CONFIGs
allowed=util/config_allowed.txt
[ "$1" == "-u" ] && update=1
tmp=$(mktemp -d)
#
# Look for the CONFIG options, excluding those in Kconfig and defconfig files.
#
git grep CONFIG_ | \
grep -E -vi "(Kconfig:|defconfig:|README|\.py|\.pl:)" \
| tr ' \t' '\n' \
| sed -n 's/^\(CONFIG_[A-Za-z0-9_]*\).*/\1/p' \
| sort | uniq >"${tmp}/allowed.tmp1";
# We need a list of the valid Kconfig options to exclude these from the allowed
# list.
find . -name "Kconfig*" -exec cat {} \; | sed -n \
-e 's/^\s*config *\([A-Za-z0-9_]*\).*$/CONFIG_\1/p' \
-e 's/^\s*menuconfig *\([A-Za-z0-9_]*\).*$/CONFIG_\1/p' \
| sort | uniq >"${tmp}/allowed.tmp2"
# Use only the options that are present in the first file but not the second.
# These comprise new ad-hoc CONFIG options.
comm -23 "${tmp}/allowed.tmp1" "${tmp}/allowed.tmp2" \
| sort | uniq >"${tmp}/allowed.tmp3"
# If ${allowed} already exists, take the intersection of the current
# list and the new one. We do not want to increase the allowed options.
if [ -r "${allowed}" ]; then
comm -12 "${tmp}/allowed.tmp3" "${allowed}" > "${tmp}/allowed.tmp4"
# Find any ad-hoc configs that now have Kconfig options
comm -13 "${tmp}/allowed.tmp4" "${allowed}" > "${tmp}/allowed.tmp5"
if [ -n "${update}" ]; then
echo >&2 "Removing these CONFIG options from the allowed list:"
comm -13 "${tmp}/allowed.tmp4" "${allowed}"
mv "${tmp}/allowed.tmp4" "${allowed}"
elif [ -s "${tmp}/allowed.tmp5" ]; then
echo >&2 "Congratulations! The following options are now in"
echo >&2 "Kconfig:"
cat "${tmp}/allowed.tmp5"
echo >&2
echo >&2 "Please run this to update the list of allowed ad-hoc"
echo >&2 "CONFIGs and include this update in your CL."
echo >&2
echo -e >&2 "\t./util/build_allowed.sh -u"
fi
else
# If there is no file yet, add one. This allows it to be regenerated
# from scratch if needed.
mv "${tmp}/allowed.tmp3" "${allowed}"
fi
rm -rf "${tmp}"
unset LC_ALL LC_COLLATE
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