Radar · Rust · Archive · Week 23 · Jun 2 – 8, 2025

Crate of the week: context‑logger

Nice to knowecosystem

What changed: context‑logger, a lightweight, ergonomic library for adding structured context to logs, was highlighted.
Production impact: The source does not say.
Try it: Add context-logger to a project and log a message with context.
Source: this-week-in-rust.org/blog/2025/06/04/this-week-in-rust-602/

Understand it, then run it

Run it now

Todayrust

// This program demonstrates how you might add structured context to logs
// using only the standard library, since the `context_logger` crate is not
// available in Rust 1.98.1 (edition 2024). It prints a simple log line
// with key/value pairs to illustrate the idea.

fn main() {
    // Define some context data
    let user = "alice";
    let action = "login";

    // Build a log message with structured context
    let log = format!("INFO: user={} action={}", user, action);

    // Output the log
    println!("{}", log);
}

What it printed when we ran it on Rust 1.98.1 (edition 2024)

INFO: user=alice action=login

Run sends this program (for Solidity, the contract and its tests) to our own sandbox, where it is compiled and run once, with no network, and what it printed or the test report comes back here. Nothing is kept. Runs are counted per visitor for the day so everyone gets a turn; the details are on the legal page.

Written by gpt-oss-20b from the linked source · claims checked against the sources · archive, not individually reviewed