pre-commit hook to check size of the image, to show list of it and prompt user to continue

pre-commit.sh

#!/usr/bin/env bash

declare -r MAX_IMAGE_SIZE_MB=1
declare -r CURRENT_DIR="$(pwd)"
declare -r IMAGES_MASK=".*\.(webp|png|jpg|jpeg|gif)$"
HAS_ERROR=""

OIFS="$IFS"
IFS=$'\n'

for file in $(git diff --cached --name-only | uniq | grep -E $IMAGES_MASK); do
	file_size=$(du -m $CURRENT_DIR/$file | awk '{print $1}')
	if [ "$file_size" -gt $MAX_IMAGE_SIZE_MB ]; then
		echo "WARNING: $file is over $MAX_IMAGE_SIZE_MB MB."
		HAS_ERROR="1"
	fi
done

IFS="$OIFS"

if [ "$HAS_ERROR" != "" ]; then
    exec < /dev/tty

while true; do
  read -p "[PRE-COMMIT HOOK]: WARNING: some files exceeds file size limit.\n Do you want to proceed? (Y/n) " yn
  if [ "$yn" = "" ]; then
    yn='Y'
  fi
  case $yn in
      [Yy] ) exit 0;;
      [Nn] ) exit 1;;
  esac
done
    
fi