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nixpkgs/modules/installer/cd-dvd/iso-image.nix
Eelco Dolstra 0a0260514d * Renamed boot.localCommands to boot.postBootCommands since it wasn't
such a good name (local to what?).

svn path=/nixos/branches/modular-nixos/; revision=15879
2009-06-05 16:02:58 +00:00

97 lines
2.7 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.isoImage.
{config, pkgs, ...}:
let
cdLabel = "NIXOS_INSTALLATION_CD";
# The configuration file for Grub.
grubCfg =
''
default 0
timeout 10
splashimage /boot/background.xpm.gz
title Boot from hard disk
root (hd0)
chainloader +1
title NixOS Installer / Rescue
kernel /boot/vmlinuz init=/init ${toString config.boot.kernelParams}
initrd /boot/initrd
'';
in
{
# In stage 1 of the boot, mount the CD/DVD as the root FS by label
# so that we don't need to know its device.
fileSystems =
[ { mountPoint = "/";
label = cdLabel;
}
];
# We need AUFS in the initrd to make the CD appear writable.
boot.extraModulePackages = [config.boot.kernelPackages.aufs];
boot.initrd.extraKernelModules = ["aufs"];
# Tell stage 1 of the boot to mount a tmpfs on top of the CD using
# AUFS. !!! It would be nicer to make the stage 1 init pluggable
# and move that bit of code here.
boot.isLiveCD = true;
# Create the ISO image.
system.build.isoImage = import ../../../lib/make-iso9660-image.nix {
inherit (pkgs) stdenv perl cdrkit pathsFromGraph;
#isoName = "${relName}-${platform}.iso";
bootable = true;
bootImage = "boot/grub/stage2_eltorito";
#compressImage = ...;
volumeID = cdLabel;
# Single files to be copied to fixed locations on the CD.
contents =
[ { source = "${pkgs.grub}/lib/grub/${if pkgs.stdenv.system == "i686-linux" then "i386-pc" else "x86_64-unknown"}/stage2_eltorito";
target = "boot/grub/stage2_eltorito";
}
{ source = pkgs.writeText "menu.lst" grubCfg;
target = "boot/grub/menu.lst";
}
{ source = config.boot.kernelPackages.kernel + "/vmlinuz";
target = "boot/vmlinuz";
}
{ source = config.system.build.initialRamdisk + "/initrd";
target = "boot/initrd";
}
{ source = config.boot.grubSplashImage;
target = "boot/background.xpm.gz";
}
];
# Closures to be copied to the Nix store on the CD.
storeContents =
[ { object = config.system.build.bootStage2;
symlink = "/init";
}
{ object = config.system.build.system;
symlink = "/system";
}
];
};
# After booting, register the contents of the Nix store on the CD in
# the Nix database in the tmpfs.
boot.postBootCommands =
''
${config.environment.nix}/bin/nix-store --load-db < /nix-path-registration
rm /nix-path-registration
'';
}