nixpkgs/test/rescue-cd.nix

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let
# The label used to identify the installation CD.
cdromLabel = "NIXOS";
in
# Build boot scripts for the CD that find the CD-ROM automatically.
with import ./rescue-system.nix {
autoDetectRootDevice = true;
rootLabel = cdromLabel;
stage2Init = "/init";
readOnlyRoot = true;
};
rec {
inherit nixosInstaller bootStage1; # !!! debug
# Since the CD is read-only, the mount points must be on disk.
cdMountPoints = pkgs.stdenv.mkDerivation {
name = "mount-points";
builder = builtins.toFile "builder.sh" "
source $stdenv/setup
mkdir $out
cd $out
mkdir proc sys tmp etc dev var mnt nix nix/var
touch $out/${cdromLabel}
";
};
# Create an ISO image containing the isolinux boot loader, the
# kernel, the initrd produced above, and the closure of the stage 2
# init.
rescueCD = import ./make-iso9660-image.nix {
inherit (pkgs) stdenv cdrtools nix;
isoName = "nixos.iso";
contents = [
{ source = pkgs.syslinux + "/lib/syslinux/isolinux.bin";
target = "isolinux/isolinux.bin";
}
{ source = ./isolinux.cfg;
target = "isolinux/isolinux.cfg";
}
{ source = pkgs.kernel + "/vmlinuz";
target = "isolinux/vmlinuz";
}
{ source = initialRamdisk + "/initrd";
target = "isolinux/initrd";
}
{ source = cdMountPoints;
target = "/";
}
];
init = bootStage2;
bootable = true;
bootImage = "isolinux/isolinux.bin";
};
}