iankelling.org Git - distro-setup/blob - ziva-screen

   1 #!/bin/bash
   2
   3 # Get screenshots from bow, discard them if they dont change much.
   4
   5 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
   6
   7 set -e; . /usr/local/lib/bash-bear; set +e
   8
   9 dest_dir=/d/ziva-log
  10 case $HOSTNAME in
  11   sy)
  12     dest_dir=/t/zlog
  13     ;;
  14 esac
  15
  16 f=/run/user/1000/ziva-tmp.jpg
  17
  18 install -g 1000 -o 1000 -m 700 $dest_dir
  19 cd $dest_dir
  20 shopt -s nullglob
  21 jpgs=( 20*jpg )
  22 if (( ${#jpgs[@]} >= 1 )); then
  23   # shellcheck disable=SC2048 # intentional
  24   lastf=$(ls -1 20*jpg  | tail -n1)
  25 fi
  26
  27 ssh bow DISPLAY=:0 scrot -z $f 2>/dev/null || exit 0
  28 rsync --inplace bow:$f $dest_dir 2>/dev/null || exit 0
  29 ssh bow rm -f $f
  30
  31 same=false
  32 if [[ $lastf ]]; then
  33   # returns 2 on error, but maybe in that case we want to ignore, file the image away
  34   # and then it can go away in a subsequent comparison. going with that for now.
  35   diff=$(compare -metric MSE $lastf ziva-tmp.jpg /dev/null |& sed 's/[^0-9].*//') ||:
  36   if printf "%s\n" "$diff" | grep -E '^[0-9]+$' &>/dev/null && (( diff < 200 )); then
  37     same=true
  38   fi
  39 fi
  40
  41 if $same; then
  42   rm -f ziva-tmp.jpg
  43 else
  44   mv ziva-tmp.jpg "$(date +%F.%R)".jpg
  45 fi