#!/usr/bin/env bash

GIT_CLANG_FORMAT=${GIT_CLANG_FORMAT:-git-clang-format}

if [ ${CLANG_FORMAT_BINARY} ]; then
   GIT_CLANG_FORMAT_BINARY="--binary ${CLANG_FORMAT_BINARY}"
fi
GIT_CLANG_FORMAT_BINARY=${GIT_CLANG_FORMAT_BINARY:-}

# Run git-clang-format to check for violations
CLANG_FORMAT_OUTPUT=/tmp/clvk-clang-format-output.txt
${GIT_CLANG_FORMAT} ${GIT_CLANG_FORMAT_BINARY} --diff origin/main --extensions cpp,hpp >$CLANG_FORMAT_OUTPUT

# Check for no-ops
grep '^no modified files to format$' "$CLANG_FORMAT_OUTPUT" && exit 0
grep '^clang-format did not modify any files$' "$CLANG_FORMAT_OUTPUT" && exit 0

# Dump formatting diff and signal failure
echo -e "\n==== FORMATTING VIOLATIONS DETECTED ====\n"
cat "$CLANG_FORMAT_OUTPUT"
exit 1