check_format.sh

#!/bin/bash
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EXIT_CODE=0
echo "\
############################################################################
Checking formatting of modified files. It is expected that the files were
formatted with clang-format 12.0.0. It is also expected that clang-format
version 12.0.0 is used for the check. Otherwise the result can ne unexpected.
############################################################################"

CLANG_FORMAT="clang-format"
[[ ! -z $1 ]] && CLANG_FORMAT=$1
which "$CLANG_FORMAT" || { echo "No $CLANG_FORMAT found in PATH" && exit 1; }
REQUIRED_VERSION="12.0.0"
VERSION_STRING="clang-format version $REQUIRED_VERSION.*"
CURRENT_VERSION="$($CLANG_FORMAT --version)"
if ! [[ $CURRENT_VERSION =~ $VERSION_STRING ]] ; then
    echo WARNING: clang-format version $REQUIRED_VERSION is required but $CURRENT_VERSION is used.
    echo The results can be unexpected.
fi

# Check all source files.
# For benchmarks folder do not check 03_complex, as these tests come from real projects with their formatting.
FILES=`ls src/*.cpp src/*.h src/opt/*.cpp src/opt/*.h *.cpp builtins/builtins-c-* benchmarks/{01,02}*/*{cpp,ispc} common/*.h stdlib.ispc`
for FILE in $FILES; do
    diff -uN --label original/$FILE --label formatted/$FILE <(cat $FILE) <($CLANG_FORMAT $FILE)
    if [ $? -ne 0 ]; then
        echo "[!] INCORRECT FORMATTING! $FILE" >&2
            EXIT_CODE=1
        fi
    done
if [ $EXIT_CODE -eq 0 ]; then 
    echo "No formatting issues found"
fi
exit $EXIT_CODE