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|
# 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-label" config.system.nixos.label;
in
{
options = {
tarball.contents = mkOption {
example = literalExpression ''
[ { 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 = literalExpression "[ 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" "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 + "/" + config.system.boot.loader.initrdFile;
target = "/boot/" + config.system.boot.loader.initrdFile;
}
{ source = versionFile;
target = "/nixos-version.txt";
}
];
# Create the tarball
system.build.tarball = import ../../../lib/make-system-tarball.nix {
inherit (pkgs) stdenv closureInfo pixz;
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.out}/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.out}/bin/nix-env -p /nix/var/nix/profiles/system --set /run/current-system
'';
};
}
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