nixpkgs/nixos/modules/installer/tools/tools.nix
obadz 24f8cf08cc nixos/lib/make-disk-image: refactor to use nixos-install
- Replace hand-rolled version of nixos-install in make-disk-image by an
  actual call to nixos-install
- Required a few cleanups of nixos-install
- nixos-install invokes an activation script which the hand-rolled version
  in make-disk-image did not do. We remove /etc/machine-id as that's
  a host-specific, impure, output of the activation script

Testing:

nix-build '<nixpkgs/nixos/release.nix>' -A tests.installer.simple passes

Also tried generating an image with:

nix-build -E 'let
    pkgs = import <nixpkgs> {};
    lib = pkgs.lib;
    nixos = import <nixpkgs/nixos> {
      configuration = {
        fileSystems."/".device = "/dev/disk/by-label/nixos";
        boot.loader.grub.devices = [ "/dev/sda" ];
        boot.loader.grub.extraEntries = '"''"'
          menuentry "Ubuntu" {
             insmod ext2
             search --set=root --label ubuntu
             configfile /boot/grub/grub.cfg
          }
        '"''"';
      };
    };
  in import <nixpkgs/nixos/lib/make-disk-image.nix> {
    inherit pkgs lib;
    config = nixos.config;
    diskSize = 2000;
    partitioned = false;
    installBootLoader = false;
  }'

Then installed the image:
$ sudo df if=./result/nixos.img of=/dev/sdaX bs=1M
$ sudo resize2fs /dev/disk/by-label/nixos
$ sudo mount /dev/disk/by-label/nixos /mnt
$ sudo mount --rbind /proc /mnt/proc
$ sudo mount --rbind /dev /mnt/dev
$ sudo chroot /mnt /nix/var/nix/profiles/system/bin/switch-to-configuration boot

[ … optionally do something about passwords … ]

and successfully rebooted to that image.

Was doing all this from inside a Ubuntu VM with a single user nix install.
2016-08-16 15:31:16 +01:00

82 lines
1.8 KiB
Nix

# This module generates nixos-install, nixos-rebuild,
# nixos-generate-config, etc.
{ config, pkgs, modulesPath, ... }:
let
cfg = config.installer;
makeProg = args: pkgs.substituteAll (args // {
dir = "bin";
isExecutable = true;
});
nixos-build-vms = makeProg {
name = "nixos-build-vms";
src = ./nixos-build-vms/nixos-build-vms.sh;
};
nixos-install = makeProg {
name = "nixos-install";
src = ./nixos-install.sh;
inherit (pkgs) perl pathsFromGraph rsync;
nix = config.nix.package.out;
cacert = "${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt";
root_uid = config.ids.uids.root;
nixbld_gid = config.ids.gids.nixbld;
nixClosure = pkgs.runCommand "closure"
{ exportReferencesGraph = ["refs" config.nix.package.out]; }
"cp refs $out";
};
nixos-rebuild = makeProg {
name = "nixos-rebuild";
src = ./nixos-rebuild.sh;
nix = config.nix.package.out;
};
nixos-generate-config = makeProg {
name = "nixos-generate-config";
src = ./nixos-generate-config.pl;
path = [ pkgs.btrfs-progs ];
perl = "${pkgs.perl}/bin/perl -I${pkgs.perlPackages.FileSlurp}/lib/perl5/site_perl";
inherit (config.system) nixosRelease;
};
nixos-option = makeProg {
name = "nixos-option";
src = ./nixos-option.sh;
};
nixos-version = makeProg {
name = "nixos-version";
src = ./nixos-version.sh;
inherit (config.system) nixosVersion nixosCodeName nixosRevision;
};
in
{
config = {
environment.systemPackages =
[ nixos-build-vms
nixos-install
nixos-rebuild
nixos-generate-config
nixos-option
nixos-version
];
system.build = {
inherit nixos-install nixos-generate-config nixos-option nixos-rebuild;
};
};
}