1#!/bin/sh
2# Copyright (c) 2016 Google, Inc
3# Written by Simon Glass <sjg@chromium.org>
4#
5# Check that the u-boot.cfg file provided does not introduce any new
6# ad-hoc CONFIG options
7#
8# Use scripts/build-whitelist.sh to generate the list of current ad-hoc
9# CONFIG options (those which are not in Kconfig).
10
11# Usage
12#    check-config.sh <path to u-boot.cfg> <path to whitelist file> <source dir>
13#
14# For example:
15#   scripts/check-config.sh b/chromebook_link/u-boot.cfg kconfig_whitelist.txt .
16
17set -e
18set -u
19
20PROG_NAME="${0##*/}"
21
22usage() {
23	echo "$PROG_NAME <path to u-boot.cfg> <path to whitelist file> <source dir>"
24	exit 1
25}
26
27[ $# -ge 3 ] || usage
28
29path="$1"
30whitelist="$2"
31srctree="$3"
32
33# Temporary files
34configs="${path}.configs"
35suspects="${path}.suspects"
36ok="${path}.ok"
37new_adhoc="${path}.adhoc"
38
39export LC_ALL=C
40export LC_COLLATE=C
41
42cat ${path} |sed -n 's/^#define \(CONFIG_[A-Za-z0-9_]*\).*/\1/p' |sort |uniq \
43	>${configs}
44
45comm -23 ${configs} ${whitelist} > ${suspects}
46
47cat `find ${srctree} -name "Kconfig*"` |sed -n \
48	-e 's/^\s*config *\([A-Za-z0-9_]*\).*$/CONFIG_\1/p' \
49	-e 's/^\s*menuconfig \([A-Za-z0-9_]*\).*$/CONFIG_\1/p' \
50	|sort |uniq > ${ok}
51comm -23 ${suspects} ${ok} >${new_adhoc}
52if [ -s ${new_adhoc} ]; then
53	echo >&2 "Error: You must add new CONFIG options using Kconfig"
54	echo >&2 "The following new ad-hoc CONFIG options were detected:"
55	cat >&2 ${new_adhoc}
56	echo >&2
57	echo >&2 "Please add these via Kconfig instead. Find a suitable Kconfig"
58	echo >&2 "file and add a 'config' or 'menuconfig' option."
59	# Don't delete the temporary files in case they are useful
60	exit 1
61else
62	rm ${suspects} ${ok} ${new_adhoc}
63fi
64