On Mon, 20 Oct 2014 09:50:15 +0200 Eelco Dolstra <eelco.dols...@logicblox.com> wrote:
> > The basic idea is this: To build a system, you use a standard > > function from Nixpkgs and pass it a configuration module. The > > result is a derivation that represents a complete self-contained > > system. > > How does that differ from how NixOS is currently implemented? You can > do: > > $ nix-build '<nixpkgs/nixos>' -A system > > which gives you a complete system in ./result, where > e.g. ./result/init is the stage 2 init script that runs the activation > script and invokes systemd. How would I refer to multiple systems with different configurations from within a Nix expression? The change would allow this: { system1 = import <nixos/build-system.nix> module1; system2 = import <nixos/build-system.nix> module2; system3 = import <nixos/build-system.nix> module3; } > Programs like nixos-rebuild, nixos-install, nixos-container and even > NixOps are really just wrappers around this (except that they add > various levels of provisioning). They all make the assumption that there is exactly one current system configuration. > > In other words a container-based NixOS system is really just a Nix > > store, nothing more. It doesn't need to contain any additional > > files or directories and building it does not require us to > > understand the complexity of nixos-install, because it will all be > > moved to the system initialisation phase. > > I don't think nixos-install is that complex. Almost all of the > initialisation it does in the target file system is to make nix-build > work in the chroot. The NixOS initialisation is done by the activation > script. > > Check out "nixos-container create" - it does almost no initialisation > of the container file system, since everything is done by the > activation script during the first boot of the container. That's already most of what I need. What remains is a way to build multiple configurations and deploy them to different systems in a functional way, in particular without environment variables. Greets, Ertugrul -- Ertugrul Söylemez <ert...@gmx.de> _______________________________________________ nix-dev mailing list nix-dev@lists.science.uu.nl http://lists.science.uu.nl/mailman/listinfo/nix-dev