This repository is here to provide some examples of logging in Rust. There are two separate rust projects. The first is a basic example using the env_logger crate. It is designed to show the basics of how the log crate works. The second example, file-logging is there to provide an example of working with a more advanced logging backend.
- Use the log crate
- provides a backend-agnostic logging interface
- Really easy to use different backends in different scenarios
- defaults to a no-op backend with a really low overhead
- The env_logger crate is by far the most popular logging backend
- Just prints to stdout
- Can set different log levels by setting the
RUST_LOGenvironment variable - Built in filtering of log messages using regex
- Can customize the format using a closure to format log messages
- Can customize the name of the environment variable that's used for filtering
- Best choice for use in tests
- log4rs is a good choice if you need to log to files
- Basically a Rust clone of log4j
- Configuration can be done either in code or using one of several file formats
- Can handle all the crazy logging configurations you're likely to need
- Extensible, can write your own appender if you want
- The only Rust logging library that has a rolling file appender as far as I can tell
- Fern is also somewhat popular, but I have not used it myself
- Appears nearly on par with lo4rs in terms of features
- No commits in over a year :(