#!/bin/bash

# If CLANG_FORMAT_EXE exists in the environment,
# it is used instead of 'clang-format'.
CLANG_FORMAT_EXECUTABLE=${CLANG_FORMAT_EXE:-clang-format}

if ! [ -x "$(command -v ${CLANG_FORMAT_EXECUTABLE})" ]; then
  echo "***   ${CLANG_FORMAT_EXECUTABLE} could not be found."
  exit 1
fi

CLANG_FORMAT_VERSION="$(${CLANG_FORMAT_EXECUTABLE} --version)"
CLANG_FORMAT_MAJOR_VERSION=$(echo "${CLANG_FORMAT_VERSION}" | sed 's/^[^0-9]*\([0-9]*\).*$/\1/g')
CLANG_FORMAT_MINOR_VERSION=$(echo "${CLANG_FORMAT_VERSION}" | sed 's/^[^0-9]*[0-9]*\.\([0-9]*\).*$/\1/g')

if [ "${CLANG_FORMAT_MAJOR_VERSION}" -ne 16 ] || [ "${CLANG_FORMAT_MINOR_VERSION}" -ne 0 ]; then
  echo "***   This indent script requires clang-format version 16.0,"
  echo "***   but version ${CLANG_FORMAT_MAJOR_VERSION}.${CLANG_FORMAT_MINOR_VERSION} was found instead."
  exit 1
fi

BASE_DIR="$(git rev-parse --show-toplevel)"
cd $BASE_DIR
if [ ! -f "scripts/apply-clang-format" ]; then
  echo "***   The indenting script must be executed from within the Kokkos clone!"
  exit 1
fi

echo "***   Running clang-format"
git ls-files | grep "\.\(hpp\|cpp\|cppm\|h\|cc\)$" | xargs ${CLANG_FORMAT_EXECUTABLE} -i
echo "***   Running clang-format - done"

echo "***   Running trailing whitespaces check"
# BSD sed does not have a --version flag, while GNU sed does.
if sed --version >/dev/null 2>&1; then
  # GNU
  git ls-files | grep "\.\(md\)$" | xargs sed -i -r 's/[[:blank:]]+$//g'
else
  # BSD
  git ls-files | grep "\.\(md\)$" | xargs sed -i '' -r 's/[[:blank:]]+$//g'
fi
echo "***   Running trailing whitespaces check - done"