This code has been moved to https://github.com/KodrAus/antlog
This is a rough-and-ready experimental API for enriching logs with contextual properties without having to pass explicit loggers through your application. It works with the log crate, currently using a custom env_logger format. Property enrichment is a feature that works naturally with structured logging.
See the examples for more details.
slog supports enriching logs with properties drawn from a context, but requires you pass a logger as an explicit argument. Passing loggers is the most flexible and only universal way to ensure the context you expect to be available actually is. But because logging is a cross-cutting concern, it can be noisy to see logger arguments peppered throughout your API, and tedious to try and introduce logging deep into a logical call context where it isn't already available. The seanmonstar method of stuffing extra context in arbitrary self types is a potentially less intrusive way to thread loggers and other bits of cross-cutting context around. slog also doesn't prevent a user from building their own mechanism for ambient loggers if they want (there already is a slog-scope library).
This library is a compromise between the flexibility of explicit loggers for property enrichment, and the convenience of just calling info! anywhere and having ambient context available. The compromise is in additional background plumbing and a potential loss of context if threads are spawned without passing a context to them. It works on the assumption that anything is better than nothing and less friction (with a few tactical changes to capture context before passing to threads) makes it more likely that logs will exist and carry useful information.