bash:resize and upload to s3

gistfile1.txt

#!/bin/bash
cd "$(dirname "$0")"

shopt -s nocaseglob

rm -frv ./optimized_images/*
mkdir -p ./optimized_images/400w

AWS_PATH="<s3-uri>"
for f in ./unoptimized_images/*.{jpg,jpeg,png}
do
  if [ -f "$f" ]; then
    ext="${f##*.}"
    fn=$(basename "$f")

    fn_optimized="./optimized_images/$fn"
    fn_optimized_webp="${fn_optimized%.*}".webp

    fn_optimized_400w="./optimized_images/400w/$fn"
    fn_optimized_webp_400w="${fn_optimized_400w%.*}".webp

    ff=( "$fn_optimized" "$fn_optimized_400w" "$fn_optimized_webp" "$fn_optimized_webp_400w" )

    # resize into given dimensions keeping ratio or original dimensions in case the image fits entirely into given dimensions
    for img in "${ff[@]}"; do
      resize="700x1240>"
      if [[ "$img" == */400w/* ]]; then
        resize="400x"
      fi
      extimg="${img##*.}" 
      case "$ext" in 
        jpg|jpeg)
          if [ "$extimg" != "webp" ]; then
            img="${img%.*}".jpg
            convert "$f" -resize "$resize" -sampling-factor 4:2:0 -strip -quality 80 -interlace JPEG -colorspace sRGB -sigmoidal-contrast 5,50% "$img"
          else
            convert "$f" -resize "$resize" -define webp:lossless=false "$img"
          fi
          ;;
        png)
          if [ "$extimg" != "webp" ]; then
            optipng "$f" -out "$fn_optimized"
            mogrify -resize "$resize" -sigmoidal-contrast 5,50% "$img"
          else
            convert "$f" -resize "$resize" -define webp:lossless=false "$img"
          fi
          ;;
        *)
          echo "Skypping unknown extension ["$ext"]"
          ;;
      esac
      aws_file="${img##*/}"
      if [[ "$img" == */400w/* ]]; then
        aws_file=400w/"$aws_file"
      fi

      aws s3 cp $img $AWS_PATH/$aws_file --acl public-read --metadata "Cache-Control=max-age=2592000"
    done
  fi
done

shopt -u nocaseglob