Dirrotate is a small application which continuously monitors a directory for new files and moves them to a monthly archive directory after a specific timespan. It uses the exif time (if present) or mtime to decide how old a file is. You can also use it together with file synchronization software like Syncthing to remove old pictures from your mobile.
docker-compose example (base-directory/current will be monitored):
version: "3"
services:
dirrotate:
image: dirrotate
restart: always
environment:
- 'TZ=Europe/Berlin'
volumes:
- 'base-directory:/mnt'
- '/usr/share/zoneinfo:/usr/share/zoneinfo:ro'
Important note: Dirrotate just waits three seconds after it detects a new file before reading it. Especially if dirrotate moves those new files immediately, they might be incomplete.