This is gallery software designed to maintain a shadow structure
of your filesystem, in which you can attach metadata to your media,
and query your collections in various ways.

All media is content-addressed by its SHA-1 hash value, and at your option
also perceptually hashed.  Duplicate search is an essential feature.

Prerequisites: Go, ImageMagick, xdg-utils

The gallery is designed for simplicity, and easy interoperability.
sqlite3, curl, jq, and the filesystem will take you a long way.

The intended mode of use is running daily automated sync/thumbnail/dhash/tag
batches in a cron job, or from a system timer.  See test.sh for usage hints.