# This builds a rootfs image (ext4) from the current configuration. { config, lib, pkgs, ... }: let inherit (config.boot) growPartition; inherit (lib) optionalString; in { boot.loader.grub.enable = false; boot.loader.generic-extlinux-compatible.enable = false; boot.growPartition = lib.mkDefault true; system.build.rootfs = pkgs.imageBuilder.fileSystem.makeExt4 { name = "NIXOS_SYSTEM"; partitionID = "44444444-4444-4444-8888-888888888888"; populateCommands = let closureInfo = pkgs.buildPackages.closureInfo { rootPaths = config.system.build.toplevel; }; in '' mkdir -p ./nix/store echo "Copying system closure..." while IFS= read -r path; do echo " Copying $path" cp -prf "$path" ./nix/store done < "${closureInfo}/store-paths" echo "Done copying system closure..." cp -v ${closureInfo}/registration ./nix-path-registration ''; # Give some headroom for initial mounting. extraPadding = pkgs.imageBuilder.size.MiB 20; } ; # FIXME: this is not a rootfs! system.build.diskImage = pkgs.imageBuilder.diskImage.makeMBR { name = "mobile-nixos"; diskID = "01234567"; partitions = [ # FIXME : initrd how? config.system.build.rootfs ]; } ; boot.postBootCommands = '' # On the first boot do some maintenance tasks if [ -f /nix-path-registration ]; then # Register the contents of the initial Nix store ${config.nix.package.out}/bin/nix-store --load-db < /nix-path-registration # nixos-rebuild also requires a "system" profile and an /etc/NIXOS tag. touch /etc/NIXOS ${config.nix.package.out}/bin/nix-env -p /nix/var/nix/profiles/system --set /run/current-system # Prevents this from running on later boots. rm -f /nix-path-registration fi ''; fileSystems = { "/" = { # Expected to be installed as `system` partition on android-like. # Thus the name. # TODO: move into the android system type. device = "/dev/disk/by-label/NIXOS_SYSTEM"; fsType = "ext4"; autoResize = true; }; }; }