Crate

env_logger

Logger backend for the log crate, configured via RUST_LOG.

What it is

env_logger is the simplest logging backend for the log facade. It reads RUST_LOG to configure per-module log levels, then writes formatted output to stderr. Initialization is a single env_logger::init() call at program startup.

Why it is commonly used

The default logger in Rust CLI tools and test suites. Zero configuration in code, runtime-controllable with RUST_LOG=debug or RUST_LOG=myapp=trace, and requiring no setup beyond one line in main().

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