Git pre-commit script to run code formatter automatically

pre-commit

#!/bin/env bash

set -e

files=$((git diff --cached --name-only --diff-filter=ACMR | grep -Ei "\.rs$") || true)
if [ ! -z "${files}" ]; then
    comma_files=$(echo "$files" | paste -s -d "," -)
    make fmt
    git add $(echo "$files" | paste -s -d " " -)
fi