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#!/bin/bash
# Copyright 2020 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.
# Tool to compare two commits and make sure that the resulting build output is
# exactly the same.
. /usr/share/misc/shflags
DEFINE_string 'board' "nocturne_fp" 'Board to build (\"all\" for all boards)' \
'b'
DEFINE_string 'ref1' "HEAD" 'Git reference (commit, branch, etc)'
DEFINE_string 'ref2' "HEAD^" 'Git reference (commit, branch, etc)'
# Process commandline flags.
FLAGS "${@}" || exit 1
eval set -- "${FLAGS_ARGV}"
set -e
BOARD="${FLAGS_board}"
BOARDS_TO_SKIP="$(grep -E '^skip_boards =' Makefile.rules)"
BOARDS_TO_SKIP="${BOARDS_TO_SKIP//skip_boards = /}"
# Cr50 doesn't have reproducible builds.
# The following fails:
# git commit --allow-empty -m "Test" &&
# ./util/compare_build.sh --board cr50 --ref1 HEAD --ref2 HEAD^
BOARDS_TO_SKIP+=" cr50"
# Can specify any valid git ref (e.g., commits or branches).
OLD_REF="$(git rev-parse --short "${FLAGS_ref1}")"
NEW_REF="$(git rev-parse --short "${FLAGS_ref2}")"
# Save current cute branch name
SAVED_BRANCH="$(git rev-parse --abbrev-ref HEAD)"
# If we are in a detached HEAD state, grab the exact commit hash
if [[ "${SAVED_BRANCH}" == "HEAD" ]]; then
SAVED_BRANCH="$(git rev-parse HEAD)"
fi
on_exit() {
# Intentionally not removing TMP_DIR on failure so that it can be
# inspected.
git checkout "${SAVED_BRANCH}" >/dev/null 2>&1
}
trap on_exit EXIT
do_build() {
local ref="$1"
local result_dir="$2"
local board="$3"
git checkout "${ref}" >/dev/null 2>&1
echo "Testing commit: $(git rev-parse --short HEAD)"
rm -rf "build/${board}"
# STATIC_VERSION makes sure the generated ec_version.h is constant.
# See util/getversion.sh.
make STATIC_VERSION=1 V=1 BOARD="${board}" -j >./build.out 2>&1
rm -rf "${result_dir}"
mv "build/${board}" "${result_dir}"
mv build.out "${result_dir}"
}
compare_board() {
local board="$1"
local old_ref="$2"
local new_ref="$3"
local tmp_dir="$4"
local old_build_dir="${tmp_dir}/build.${board}_${old_ref}"
local new_build_dir="${tmp_dir}/build.${board}_${new_ref}"
echo "BOARD: ${board}, ${old_build_dir}, ${new_build_dir}"
do_build "${old_ref}" "${old_build_dir}" "${board}"
do_build "${new_ref}" "${new_build_dir}" "${board}"
if ! diff "${old_build_dir}/ec.bin" "${new_build_dir}/ec.bin" >/dev/null 2>&1;
then
echo "ec.bin FAILURE"
exit 1
fi
rm -rf "${old_build_dir}"
rm -rf "${new_build_dir}"
}
if [[ "${BOARD}" == "all" ]]; then
BOARD=""
echo "Skipping boards: ${BOARDS_TO_SKIP}"
for b in board/*; do
b=${b//board\//}
skipped=0
echo "b: ${b}"
for skip in ${BOARDS_TO_SKIP}; do
if [[ "${skip}" == "${b}" ]]; then
skipped=1
break
fi
done
if [[ ${skipped} == 0 ]]; then
BOARD+=" ${b}"
fi
done
fi
echo "BOARD: ${BOARD}"
TMP_DIR="$(mktemp -d)"
for board in ${BOARD}; do
compare_board "${board}" "${OLD_REF}" "${NEW_REF}" "${TMP_DIR}"
done
rm -rf "${TMP_DIR}"
echo "ec.bin MATCH"
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