nixpkgs/nixos/modules/installer/cd-dvd/system-tarball.nix
Eelco Dolstra 29027fd1e1 Rewrite ‘with pkgs.lib’ -> ‘with lib’
Using pkgs.lib on the spine of module evaluation is problematic
because the pkgs argument depends on the result of module
evaluation. To prevent an infinite recursion, pkgs and some of the
modules are evaluated twice, which is inefficient. Using ‘with lib’
prevents this problem.
2014-04-14 16:26:48 +02:00

93 lines
2.5 KiB
Nix

# This module creates a bootable ISO image containing the given NixOS
# configuration. The derivation for the ISO image will be placed in
# config.system.build.tarball.
{ config, lib, pkgs, ... }:
with lib;
let
versionFile = pkgs.writeText "nixos-version" config.system.nixosVersion;
in
{
options = {
tarball.contents = mkOption {
example =
[ { source = pkgs.memtest86 + "/memtest.bin";
target = "boot/memtest.bin";
}
];
description = ''
This option lists files to be copied to fixed locations in the
generated ISO image.
'';
};
tarball.storeContents = mkOption {
example = [pkgs.stdenv];
description = ''
This option lists additional derivations to be included in the
Nix store in the generated ISO image.
'';
};
};
config = {
# In stage 1 of the boot, mount the CD/DVD as the root FS by label
# so that we don't need to know its device.
fileSystems = [ ];
# boot.initrd.availableKernelModules = [ "mvsdio" "mmc_block" "reiserfs" "ext3" "ext4" ];
# boot.initrd.kernelModules = [ "rtc_mv" ];
# Closures to be copied to the Nix store on the CD, namely the init
# script and the top-level system configuration directory.
tarball.storeContents =
[ { object = config.system.build.toplevel;
symlink = "/run/current-system";
}
];
# Individual files to be included on the CD, outside of the Nix
# store on the CD.
tarball.contents =
[ { source = config.system.build.initialRamdisk + "/initrd";
target = "/boot/initrd";
}
{ source = versionFile;
target = "/nixos-version.txt";
}
];
# Create the tarball
system.build.tarball = import ../../../lib/make-system-tarball.nix {
inherit (pkgs) stdenv perl xz pathsFromGraph;
inherit (config.tarball) contents storeContents;
};
boot.postBootCommands =
''
# After booting, register the contents of the Nix store on the
# CD in the Nix database in the tmpfs.
if [ -f /nix-path-registration ]; then
${config.nix.package}/bin/nix-store --load-db < /nix-path-registration &&
rm /nix-path-registration
fi
# nixos-rebuild also requires a "system" profile and an
# /etc/NIXOS tag.
touch /etc/NIXOS
${config.nix.package}/bin/nix-env -p /nix/var/nix/profiles/system --set /run/current-system
'';
};
}