wallpaper

Small utility that keeps the Windows desktop and lock screen updated with the daily Bing wallpaper. It fetches the latest image from https://cn.bing.com and writes it to ~/Pictures/today_bing.jpg before applying it at boot time.

Features

• blocks until an Internet connection is available before attempting to download
• writes the image once per calendar day (skips download if the previous file is still from today)
• updates both the desktop wallpaper and Windows lock screen via native Win32/WinRT APIs

Requirements

• Rust 2024 toolchain (rustc and cargo)
• Windows 10+ (the build links against Win32 and WinRT APIs; Unix builds will exit if they cannot set a wallpaper)
• Network access to https://cn.bing.com to download the JSON feed and image

Build

cargo build --release

Run

cargo run --release

The executable saves the image at ~/Pictures/today_bing.jpg and only downloads again when the existing file’s modified date differs from the current date.

Notes

• chrono, reqwest, serde_json, and the Windows-specific crates are included in Cargo.toml.
• This project defaults to a release build (optimized, link-time optimized, and stripped). Use cargo run if you want faster iteration.