#!/bin/bash
# Simple script to check for clang-format compliance

# Ensure we are at the project root
cd "$(dirname $0)"/..

wget -Nq https://llvm.org/svn/llvm-project/cfe/trunk/tools/clang-format/git-clang-format

if chmod +x git-clang-format; then
  if [[ "$1" == "--pre-commit" ]]; then
    # used via .git/hooks/pre-commit:
    # exec "$(dirname $0)"/../../scripts/format-check.sh --pre-commit
    ./git-clang-format
    exit
  fi
  CLANG_FORMAT_OUTPUT=$(./git-clang-format HEAD^ HEAD --diff)
  if [[ ! ${CLANG_FORMAT_OUTPUT} == "no modified files to format" ]] && [[ ! -z ${CLANG_FORMAT_OUTPUT} ]]; then
    echo "Failed clang format check:"
    echo "${CLANG_FORMAT_OUTPUT}"
    exit 1
  else
    echo "Passed clang format check"
  fi
else
  echo "git-clang-format not downloaded"
  exit 1
fi