Bash script for efficiently running clang-format on Linux

srcfmt

if [[ "$(uname)" != Linux ]] ; then
    echo "This script only runs on Linux"
    exit 1
fi

if [[ ! -d .git ]] ; then
    echo "Not at root of repo"
    exit 1
fi

DID_IT=N

if [[ ! -f .srcfmt ]] ; then

    make -j clang-format

    if [[ "$?" != 0 ]] ; then
        echo "FAILURE running clang-format"
        exit 1
    fi

    find . -type f | while read F
    do
        file $F | grep -F "with CRLF line terminators"
    done
else

    FMT="$( find . -name clang-format.linux | tail -n 1 )"

    if [[ "$FMT" = "" ]] ; then
        echo "can't find clang-format.linux"
    fi

    find . -iname \*.[ch] -o -iname \*.cc -o -iname \*.h.in | while read F
    do
        if [[ "$F" -nt .srcfmt ]] ; then
            echo $F
            $FMT -i $F
            if [[ "$?" != 0 ]] ; then
                echo "FAILURE running clang-format"
                exit 1
            fi
        fi
    done

    find . -type f |  while read F
    do
        if [[ "$F" -nt .srcfmt ]] ; then
            file $F | grep -F "with CRLF line terminators"
        fi
    done
fi

date >| .srcfmt
echo "ran clang-format" >> .srcfmt

exit 0