Automatically delete old screenshots. Run as a systemd timer or cron job.

delete-old-screenshots.rb

#!/usr/bin/env ruby

SCREENSHOTS_DIR = ENV['SCREENSHOTS_DIR'] ||
  ENV['HOME'] + '/Pictures/Screenshots'

MAXIMUM_TIME = ENV['MAXIMUM_TIME'] ||
  60 * 60 * 24 # 1 day

#######################################
#
# WARNING
# This script may misbehave if SCREENSHOTS_DIR contains glob special characters.
#

if ENV['XDG_SESSION_DESKTOP'] != 'KDE'
  exit 1
end

files = Dir.glob(SCREENSHOTS_DIR + '/**/*')

files.each do |file|
  time = [File.ctime(file), File.mtime(file)].max
  elapsed = Time.now - time

  if elapsed > MAXIMUM_TIME
    puts "Deleting file #{file[(SCREENSHOTS_DIR.length + 1)..-1]} ..."
    system 'kioclient5', 'move', file, 'trash:/'
  end
end