pre-commit git hook prevent binaries from commiting

pre-commit

#!/bin/sh

staginlist=(`git diff --name-only --cached`)
binarylist=()

for filelist in ${staginlist[*]}
do
    grep -Iq . ${filelist}
    if [ $? -ne 0 ]
    then
      binarylist+=(${filelist})
    fi
done


if [ ${#binarylist[@]} -ne 0 ]
then
    echo "# Binary files were found, remove them from the staging before commiting."

    for filelist in ${binarylist[*]}
    do
        echo ${filelist}
    done
fi