1 files changed, 99 insertions, 0 deletions
diff --git a/util/check_allowed.sh b/util/check_allowed.sh
new file mode 100755
index 0000000000..5212a55a14
--- /dev/null
+++ b/util/check_allowed.sh
@@ -0,0 +1,99 @@
+#!/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.
+#
+# Check that the .config file provided does not introduce any new ad-hoc CONFIG
+# options
+#
+# Use util/build_allowed.sh to generate the list of current ad-hoc
+# CONFIG options (those which are not in Kconfig).
+
+# Usage
+#    check_allowed.sh <path to .config> <path to allow file> <source dir>
+#
+# For example:
+#   scripts/check_allowed.sh build/volteer/.config config_allowed.txt .
+
+set -e
+set -u
+
+PROG_NAME="${0##*/}"
+
+usage() {
+	echo >&2 "Check that a build does not introduce new ad-hoc CONFIGs"
+	echo >&2 "Usage:"
+	echo -e >&2 "\t${PROG_NAME} <.config file> <allow file> <source dir>"
+	exit 1
+}
+
+die() {
+	echo >&2 "$1"
+	exit 2
+}
+
+[ $# -ge 3 ] || usage
+
+config="$1"
+allow="$2"
+srctree="$3"
+
+tmp=$(mktemp -d)
+
+# Temporary files
+new_configs="${tmp}/configs"
+suspects="${tmp}/suspects"
+kconfigs="${tmp}/kconfigs"
+ok="${tmp}/ok"
+new_adhoc="${tmp}/adhoc"
+
+export LC_ALL=C LC_COLLATE=C
+
+# Get a sorted list of CONFIG options in the .config file
+sed -n 's/^\(CONFIG_[A-Za-z0-9_]*\).*/\1/p' "${config}" | sort | uniq \
+	>"${new_configs}"
+
+# Find any not mentioned in the allowed file
+comm -23 --check-order "${new_configs}" "${allow}" > "${suspects}" || \
+	die "${allow} must be sorted"
+
+# Find all the Kconfig options so far defined
+find "${srctree}" -type f -name "Kconfig*" -exec cat {} \; | sed -n -e \
+	's/^\s*\(config\|menuconfig\) *\([A-Za-z0-9_]*\)$/CONFIG_\2/p' \
+	| sort | uniq > "${kconfigs}"
+
+# Most Kconfigs follow the pattern of CONFIG_PLATFORM_EC_*.  Strip PLATFORM_EC_
+# from the config name to match the cros-ec namespace.
+sed -e 's/^CONFIG_PLATFORM_EC_/CONFIG_/p' "${kconfigs}" | sort | uniq > "${ok}"
+
+# Complain about any new ad-hoc CONFIGs
+comm -23 "${suspects}" "${ok}" >"${new_adhoc}"
+if [ -s "${new_adhoc}" ]; then
+	echo >&2 "Error: The EC is in the process of migrating to Zephyr."
+	echo -e >&2 "\tZephyr uses Kconfig for configuration rather than"
+	echo -e >&2 "\tad-hoc #defines."
+	echo -e >&2 "\tAny new EC CONFIG options must ALSO be added to Zephyr"
+	echo -e >&2 "\tso that new functionality is available in Zephyr also."
+	echo -e >&2 "\tThe following new ad-hoc CONFIG options were detected:"
+	echo >&2
+	cat >&2 "${new_adhoc}"
+	echo >&2
+	echo >&2 "Please add these via Kconfig instead. Find a suitable Kconfig"
+	echo >&2 "file in zephyr/ and add a 'config' or 'menuconfig' option."
+	echo >&2 "Also see details in http://issuetracker.google.com/181253613"
+	echo >&2
+	echo >&2 "To temporarily disable this, use: ALLOW_CONFIG=1 make ..."
+	rm -rf "${tmp}"
+	exit 1
+else
+	# If we are running in a git repo, check if we can remove some things
+	# from the allowed file
+	if git status 2>/dev/null; then
+		./util/build_allowed.sh
+	fi
+fi
+
+rm -rf "${tmp}"