101 lines
2.6 KiB
Nix
101 lines
2.6 KiB
Nix
let
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# The label used to identify the installation CD.
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cdromLabel = "NIXOS";
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in
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# Build boot scripts for the CD that find the CD-ROM automatically.
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with import ./boot-environment.nix {
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autoDetectRootDevice = true;
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rootLabel = cdromLabel;
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stage2Init = "/init";
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readOnlyRoot = true;
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};
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rec {
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inherit nixosInstaller bootStage1 upstartJobs; # !!! debug
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# Since the CD is read-only, the mount points must be on disk.
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cdMountPoints = pkgs.stdenv.mkDerivation {
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name = "mount-points";
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builder = builtins.toFile "builder.sh" "
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source $stdenv/setup
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ensureDir $out
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cd $out
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mkdir proc sys tmp etc dev var mnt nix nix/var
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touch $out/${cdromLabel}
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";
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};
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# We need a copy of the Nix expressions for Nixpkgs and NixOS on the
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# CD. We put them in a tarball because accessing that many small
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# files from a slow device like a CD-ROM takes too long.
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makeTarball = tarName: input: pkgs.stdenv.mkDerivation {
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name = "tarball";
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inherit tarName input;
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builder = builtins.toFile "builder.sh" "
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source $stdenv/setup
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ensureDir $out
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(cd $input && tar cvfj $out/$tarName . \\
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--exclude '*~' --exclude '.svn' \\
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--exclude 'pkgs' --exclude 'result')
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";
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};
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# Put the current directory in the tarball. !!! This gives us a lot
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# of crap (like .svn if this is a working copy). An "svn export"
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# would be better, but that's impure.
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nixosTarball = makeTarball "nixos.tar.bz2" ./.;
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nixpkgsTarball = pkgs.fetchurl {
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url = http://nix.cs.uu.nl/dist/nix/nixpkgs-0.11pre7060/nixpkgs-0.11pre7060.tar.bz2;
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md5 = "67163e7a71f7b8cb01461e1d0467a6e1";
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};
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# Create an ISO image containing the isolinux boot loader, the
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# kernel, the initrd produced above, and the closure of the stage 2
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# init.
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rescueCD = import ./make-iso9660-image.nix {
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inherit (pkgs) stdenv cdrtools;
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isoName = "nixos.iso";
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contents = [
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{ source = pkgs.syslinux + "/lib/syslinux/isolinux.bin";
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target = "isolinux/isolinux.bin";
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}
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{ source = ./isolinux.cfg;
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target = "isolinux/isolinux.cfg";
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}
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{ source = pkgs.kernel + "/vmlinuz";
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target = "isolinux/vmlinuz";
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}
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{ source = initialRamdisk + "/initrd";
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target = "isolinux/initrd";
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}
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{ source = cdMountPoints;
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target = "/";
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}
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{ source = nixosTarball + "/" + nixosTarball.tarName;
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target = "/" + nixosTarball.tarName;
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}
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{ source = nixpkgsTarball;
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target = "/nixpkgs.tar.bz2";
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}
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];
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init = bootStage2;
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bootable = true;
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bootImage = "isolinux/isolinux.bin";
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};
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}
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