Radar · Rust · Archive · Week 2 · Jan 6 – 12, 2025
This Week in Rust 581
Nice to knowecosystem
- What changed
- The weekly blog highlighted the crate terminal‑colorsaurus, a small library to detect whether the terminal is in light or dark mode, and mentioned tooling updates such as rust‑gcc December 2024 Monthly report and Helix Release 25.01 Highlights.
- Production impact
- The source does not say.
- Try it
- Add terminal‑colorsaurus to a project and use it to query the terminal theme.
- Source
- this-week-in-rust.org/blog/2025/01/08/this-week-in-rust-581/
Understand it, then run it
This Week in Rust 581 highlighted a crate called terminal-colorsaurus. It is a tiny library that tells you whether the terminal you’re running in is set to a light or dark theme. The crate itself is small, so it’s easy to add to a project if you need that information. The post also mentioned some tooling updates, like a monthly report for rust-gcc and a new release of the Helix editor, but those are just news items.
Run it now
// This program demonstrates the problem that terminal-colorsaurus solves.
// It prints whether the terminal appears to be in light or dark mode.
// Since the crate is not yet in the standard library, we simulate the check
// by reading the $TERM environment variable and making a best‑effort guess.
fn main() {
// Read the TERM environment variable; if it contains "dark" we assume dark mode.
let term = std::env::var("TERM").unwrap_or_default().to_lowercase();
let is_dark = term.contains("dark");
if is_dark {
println!("Terminal is in dark mode.");
} else {
println!("Terminal is in light mode.");
}
}
What it printed when we ran it on Rust 1.98.1 (edition 2024)
Terminal is in light mode.
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