pyrox.dev
1# This module creates a bootable ISO image containing the given NixOS
2# configuration. The derivation for the ISO image will be placed in
3# config.system.build.tarball.
4
5{ config, lib, pkgs, ... }:
6
7with lib;
8
9let
10
11 versionFile = pkgs.writeText "nixos-version" config.system.nixosVersion;
12
13in
14
15{
16 options = {
17 tarball.contents = mkOption {
18 example = literalExample ''
19 [ { source = pkgs.memtest86 + "/memtest.bin";
20 target = "boot/memtest.bin";
21 }
22 ]
23 '';
24 description = ''
25 This option lists files to be copied to fixed locations in the
26 generated ISO image.
27 '';
28 };
29
30 tarball.storeContents = mkOption {
31 example = literalExample "[ pkgs.stdenv ]";
32 description = ''
33 This option lists additional derivations to be included in the
34 Nix store in the generated ISO image.
35 '';
36 };
37
38 };
39
40 config = {
41
42 # In stage 1 of the boot, mount the CD/DVD as the root FS by label
43 # so that we don't need to know its device.
44 fileSystems = [ ];
45
46 # boot.initrd.availableKernelModules = [ "mvsdio" "reiserfs" "ext3" "ext4" ];
47
48 # boot.initrd.kernelModules = [ "rtc_mv" ];
49
50 # Closures to be copied to the Nix store on the CD, namely the init
51 # script and the top-level system configuration directory.
52 tarball.storeContents =
53 [ { object = config.system.build.toplevel;
54 symlink = "/run/current-system";
55 }
56 ];
57
58 # Individual files to be included on the CD, outside of the Nix
59 # store on the CD.
60 tarball.contents =
61 [ { source = config.system.build.initialRamdisk + "/initrd";
62 target = "/boot/initrd";
63 }
64 { source = versionFile;
65 target = "/nixos-version.txt";
66 }
67 ];
68
69 # Create the tarball
70 system.build.tarball = import ../../../lib/make-system-tarball.nix {
71 inherit (pkgs) stdenv perl xz pathsFromGraph;
72
73 inherit (config.tarball) contents storeContents;
74 };
75
76 boot.postBootCommands =
77 ''
78 # After booting, register the contents of the Nix store on the
79 # CD in the Nix database in the tmpfs.
80 if [ -f /nix-path-registration ]; then
81 ${config.nix.package.out}/bin/nix-store --load-db < /nix-path-registration &&
82 rm /nix-path-registration
83 fi
84
85 # nixos-rebuild also requires a "system" profile and an
86 # /etc/NIXOS tag.
87 touch /etc/NIXOS
88 ${config.nix.package.out}/bin/nix-env -p /nix/var/nix/profiles/system --set /run/current-system
89 '';
90
91 };
92
93}