recidiffist

recidiffist takes structured values over time and tells you how they change.

This produces an immutable log of diffs. Diffs are maps with ::added, ::removed and ::changed keys.

This lets you efficiently tie changing data (say, off a REST API) to a system that expects immutable data. That immutable data can go into a log manager, or a database like a la Datalog like Datomic and Datascript that lets you query not just the current state, but also the evolution of that state efficiently. It supports arbitrarily nested and structured data automatically by inspecting its structure, with no code to write.

For example, if you want to monitor a JSON REST API (which you pull as a cron job, or gets pushed to you via webhooks) and log changes to a log processor or dump them into Datascript to see how it changed, recidiffist is for you. If you have an audit tool and any kind of change is intrinsically interesting, recidiffist will make you happy.

License

Copyright © Latacora, LLC

Distributed under the Eclipse Public License either version 1.0 or (at your option) any later version.

This is a fork of an earlier project named kegan which was authored by the same principal author at a previous employer. To the best of our knowledge, kegan is no longer maintained.