.bin/imgcrush

   1 #!/bin/bash
   2
   3 usage() {
   4         cat <<EOF
   5 Usage: imgcrush [options] <files>
   6 EOF
   7         exit ${1:-0}
   8 }
   9
  10 crush_jpg() {
  11         jpegoptim "$1"
  12 }
  13
  14 crush_png() {
  15         # apngopt likes to corrupt images.
  16         pngcrush -e .png.new "$1"
  17         mv "${png}.new" "${png}"
  18 }
  19
  20 crush() {
  21         case $1 in
  22         *.jpg|*.jpeg) crush_jpg "$1" ;;
  23         *.png)        crush_png "$1" ;;
  24         *) echo "${0##*/}: unsupported format: $1" >&2 ;;
  25         esac
  26 }
  27
  28 main() {
  29         set -e
  30
  31         while [[ $# -ne 0 ]] ; do
  32                 case $1 in
  33                 -h) usage ;;
  34                 -*) usage 1 ;;
  35                 *)  crush "$1"; shift ;;
  36                 esac
  37         done
  38 }
  39 main "$@"