surprisingly decent image sorter in a few lines of shell

#!/bin/sh
# canything can be found here: https://github.com/keiji0/canything
focus=$(xdotool getwindowfocus)
list="./folders"
tosort=$1

if [ -z "$tosort" ]
then
  echo "read script source."
  exit 1
fi

for file in "$tosort/"*; do
  feh -d. "$file" &
  sleep 0.3
  xdotool windowfocus "$focus"
  dest=$(sort "$list" |uniq -c |sort -nr |sed 's/^ *//' |canything |sed 's/^[0-9]* *//' |tee -a "$list")
  mv -v -n -t "$dest" "$file"
  killall feh
done