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