compress-scanned pdf files

compress-pdf

#!/bin/bash

if [ -z "${1}" ]; then
  echo "please use it as 'compress-pdf <filename>'"
else
  FILE=$1
  NEW_FILE=${FILE}.new.pdf
  echo compressing $FILE
  gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/ebook -dNOPAUSE -dQUIET -dBATCH -sOutputFile="${NEW_FILE}" "${FILE}"
  ORIG_SIZE=$(ls "$FILE" -s | cut -d " " -f 1)
  NEW_SIZE=$(ls "${NEW_FILE}" -s | cut -d " " -f 1)
  if [ $ORIG_SIZE -lt $NEW_SIZE ]; then
    rm "${NEW_FILE}"
  else
    mv "${FILE}" "${FILE}.original"
    mv "${NEW_FILE}" "${FILE}"
  fi
fi