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AsteroidOS/asteroid
Build script for AsteroidOS, an open-source operating system for smartwatches
AsteroidOS is a Linux-based OS for smartwatches, built on OpenEmbedded/Yocto with libhybris for Android hardware compatibility and Qt5 for the UI layer. It's for hardware hackers who want to replace the proprietary firmware on older smartwatches like the LG G Watch, Moto 360, etc. Not for anyone expecting a polished daily driver.
Yocto-based build gives you a real, reproducible embedded Linux image rather than a hacked-together Android mod. libhybris bridging lets it run on watches designed for Android without needing mainline kernel drivers for every peripheral. The project has been alive for over a decade with active commits, which is remarkable for niche smartwatch hardware. Docker support for the build environment means you don't have to trash your host system with a Yocto toolchain.
The README is five lines pointing you to external docs — if asteroidos.org goes down, you have almost no onboarding material in the repo itself. Device support is narrow and frozen in time; most supported watches are 10+ year old hardware nobody can buy cheaply anymore. Qt5 is the UI framework, and Qt5 is EOL — this is technical debt that hasn't been addressed. Build times of 'several hours' with no incremental build guidance will burn newcomers who don't know Yocto.