Not what was mentioned by parent but I've been working on an embedded Linux build system that uses rootfs from container images: https://makrocosm.github.io/makrocosm/

The example project uses Alpine base container images, but I'm using a Debian base container for something else I'm working on.

I've been eyeing off the Radxa ROCK 5 ITX with the Rockchip RK3588. There are two variants, one gives you 4x SATA, the other gives you 1x PCIe.

There’s also the Orion O6 if you need more IO/perf - https://radxa.com/products/orion/o6#techspec

I think it's an adaptation of sorts from the podcast "Expanse: Nowhere Man", which may explain the style.

I've been working on something recently that you might find interesting: https://github.com/makrocosm/makrocosm

It's not a shell script, but it has makefile rules that make it relatively simple to build a Docker image for your architecture, export it and turn into a filesystem image, build a kernel, u-boot, etc The referenced "example project" repo builds a basic Alpine image for the Raspberry Pi (https://github.com/makrocosm/example-project/tree/main/platf...) and others

It was motivated by frustrations with Yocto at a new job after 8 or so years working on firmware for network equipment using an offshoot of uClinux. Hoping to convince new job to use Makrocosm before we settle on Yocto.