compress_images_linux

compress_images_linux.sh

#!/usr/bin/env bash
set -euo pipefail

usage() {
  echo "Usage: $0 [root_directory]" >&2
  exit 1
}

command -v magick >/dev/null 2>&1 || {
  echo "magick (ImageMagick) is required." >&2
  exit 1
}

ROOT="${1:-.}"
[[ -d "$ROOT" ]] || usage

TMP_DIR="$(mktemp -d)"
cleanup() { rm -rf "$TMP_DIR"; }
trap cleanup EXIT

find "$ROOT" -type f \( -iname '*.jpg' -o -iname '*.jpeg' -o -iname '*.png' -o -iname '*.webp' \) -print0 |
  while IFS= read -r -d '' file; do
    ext="${file##*.}"
    tmp_file="$TMP_DIR/compress.$$.$ext"

    if magick "$file" -strip -quality 80 "$tmp_file"; then
      original_size=$(stat -c %s "$file")
      compressed_size=$(stat -c %s "$tmp_file")

      if ((compressed_size < original_size)); then
        mv "$tmp_file" "$file"
        echo "Compressed: $file (${original_size} -> ${compressed_size} bytes)"
      else
        rm -f "$tmp_file"
        echo "Skipped (no gain): $file"
      fi
    else
      rm -f "$tmp_file"
      echo "Compression failed: $file" >&2
    fi
  done