Just a minimal Linux initramfs written in Rust. The magic is in the Makefile.
Use this project as a starting point for more complicated projects that act as their own Linux initramfs (no systemd).
To build, start with a working rust environment. Install the musl target:
rustup target add x86_64-unknown-linux-musl
Then:
make
Now, you've got a file, initramfs_minimal that can be used as an initramfs for Linux.