#!/bin/bash

exec 1>&2

# paths to check and re-format
sources="src unittests"
formatter="clang-format -i"
version=$($formatter --version | grep -o '[0-9\.]*')

if [[ "16.0.0" > "$version" ]]; then
    cat <<EOF

                                    ERROR
-----------------------------------------------------------------------------
            A minimum of version 16 of `clang-format` is required.
            Your version is $version.
            Please fix paths and run again.
-----------------------------------------------------------------------------

EOF
    exit 2
fi

first=$(git diff $sources)
find $sources -type f \( -name '*.cpp' -o -name '*.h' -o -name '*.ipp' \) -print0 | xargs -0 $formatter
second=$(git diff $sources)
changes=$(diff <(echo "$first") <(echo "$second") | wc -l | sed -e 's/^[[:space:]]*//')

if [ "$changes" != "0" ]; then
    cat <<\EOF

                                   WARNING
-----------------------------------------------------------------------------
  Automatically re-formatted code with `clang-format` - commit was aborted.
  Please manually add any updated files and commit again.
-----------------------------------------------------------------------------

EOF
    exit 1
fi

.githooks/ensure_release_tag