day-toolchain

One crate that knows where developer toolchains and SDKs live on your machine.

The Android SDK, NDK, and a usable JDK; Windows kits and C++/WinRT; the OpenHarmony NDK; NSIS; rustup homes — every lookup checks the conventional environment variables first (ANDROID_HOME, JAVA_HOME, and so on) and only then probes the places installers put things. The day CLI, the backend build scripts, and generated projects all ask this crate instead of hard-coding paths, so when a vendor moves something, there is one place to fix it.

Part of Day

This crate is one piece of Day, a Rust framework for building apps out of each platform's real native widgets — AppKit, UIKit, Android's Material widgets, GTK 4, Qt 6, WinUI, and ArkUI — from one codebase. There is no web view and no bundled rendering engine: when you write button("Save"), macOS shows an NSButton and Android shows a Material button.

New to Day? Start at daybrite.dev, or browse the source repository.