clang-format-show-diff.sh

# Copyright 2020 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Runs clang-format and show diff.

set -e

EXIT_CODE=0

# Recursively covers the same paths as clang-format-apply.sh. Breaks on
# whitespace.
for FILE in $(find . -name '*.h' -o -name '*.cc' -o \
                     -path './third_party' -prune -false); do
  # Run clang-format, then compare the output.
  clang-format-15 --verbose "${FILE}" |
      { cat ; echo "" ; } |
      git diff --no-index --exit-code -- "${FILE}" -
  # Indicate formatting issues through the script exit code.
  [ $? -eq 0 ] || EXIT_CODE=1
done

exit $EXIT_CODE