Added configurable Rescue CD expression. Untested. Testing and fixes extremely welcome.
svn path=/nixos/trunk/; revision=10090
This commit is contained in:
Michael Raskin
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commit
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1 changed files with 308 additions and 0 deletions
308
configuration/rescue-cd-configurable.nix
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308
configuration/rescue-cd-configurable.nix
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/*
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platform ? __currentSystem
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lib
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*/
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args: with args;
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let
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arg = name: def: lib.getAttr [name] def args;
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platform = arg "platform" __currentSystem;
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networkNixpkgs = arg "networkNixpkgs" "";
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nixpkgsMd5 = arg "nixpkgsMd5" "";
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manualEnabled = arg "manualEnabled" true;
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rogueEnabled = arg "rogueEnabled" true;
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ttyCount = lib.fold builtins.add 0 [
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(if rogueEnabled then 1 else 0)
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(if manualEnabled then 1 else 0)
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];
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sshdEnabled = arg "sshdEnabled" false;
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fontConfigEnabled = arg "fontConfigEnabled" false;
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sudoEnable = arg "sudoEnable" false;
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packages = arg "packages" [];
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includeMemtest = arg "includeMemtest" true;
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includeStdenv = arg "includeStdenv" true;
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includeBuildDeps = arg "includeBuildDeps" false;
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in
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rec {
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nixpkgsRel = "nixpkgs" + (if networkNixpkgs != "" then "-" + networkNixpkgs else "");
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configuration = {
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boot = {
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autoDetectRootDevice = true;
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readOnlyRoot = true;
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# The label used to identify the installation CD.
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rootLabel = "NIXOS";
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extraTTYs = [] ++ (lib.optional manualEnabled 7) ++
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(lib.optional rogueEnabled 8);
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};
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services = {
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sshd = {
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enable = sshdEnabled;
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};
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xserver = {
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enable = false;
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};
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extraJobs = [
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# Unpack the NixOS/Nixpkgs sources to /etc/nixos.
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{ name = "unpack-sources";
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job = "
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start on startup
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script
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export PATH=${pkgs.gnutar}/bin:${pkgs.bzip2}/bin:$PATH
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mkdir -p /etc/nixos/nixos
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tar xjf /nixos.tar.bz2 -C /etc/nixos/nixos
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tar xjf /nixpkgs.tar.bz2 -C /etc/nixos
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mv /etc/nixos/nixpkgs-* /etc/nixos/nixpkgs || true
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ln -sfn ../nixpkgs/pkgs /etc/nixos/nixos/pkgs
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chown -R root.root /etc/nixos
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end script
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";
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}]
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++
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(lib.optional manualEnabled
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# Show the NixOS manual on tty7.
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{ name = "manual";
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job = "
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start on udev
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stop on shutdown
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respawn ${pkgs.w3m}/bin/w3m ${manual} < /dev/tty7 > /dev/tty7 2>&1
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";
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})
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++
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(lib.optional rogueEnabled
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# Allow the user to do something useful on tty8 while waiting
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# for the installation to finish.
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{ name = "rogue";
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job = "
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start on udev
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stop on shutdown
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respawn ${pkgs.rogue}/bin/rogue < /dev/tty8 > /dev/tty8 2>&1
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";
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})
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;
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# And a background to go with that.
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ttyBackgrounds = {
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specificThemes = []
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++
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(lib.optional manualEnabled
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{ tty = 7;
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# Theme is GPL according to http://kde-look.org/content/show.php/Green?content=58501.
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theme = pkgs.fetchurl {
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url = http://www.kde-look.org/CONTENT/content-files/58501-green.tar.gz;
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sha256 = "0sdykpziij1f3w4braq8r8nqg4lnsd7i7gi1k5d7c31m2q3b9a7r";
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};
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})
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++
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(lib.optional rogueEnabled
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{ tty = 8;
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theme = pkgs.fetchurl {
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url = http://www.bootsplash.de/files/themes/Theme-GNU.tar.bz2;
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md5 = "61969309d23c631e57b0a311102ef034";
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};
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})
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;
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};
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mingetty = {
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helpLine = ''
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Log in as "root" with an empty password.
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''+(if manualEnabled then " Press <Alt-F7> for help." else "");
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};
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};
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fonts = {
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enableFontConfig = fontConfigEnabled;
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};
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installer = {
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nixpkgsURL =
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(if networkNixpkgs != "" then http://nix.cs.uu.nl/dist/nix/ + nixpkgsRel
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else file:///mnt/ );
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};
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security = {
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sudo = {
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enable = sudoEnable;
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};
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};
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environment = {
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extraPackages = pkgs: [
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pkgs.vim
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pkgs.subversion # for nixos-checkout
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pkgs.w3m # needed for the manual anyway
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] ++ packages;
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};
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};
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system = import ../system/system.nix {
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inherit configuration platform;
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stage2Init = "/init";
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};
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pkgs = system.pkgs;
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# The NixOS manual, with a backward compatibility hack for Nix <=
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# 0.11 (you won't get the manual).
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manual =
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if builtins ? unsafeDiscardStringContext
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then "${import ../doc/manual}/manual.html"
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else pkgs.writeText "dummy-manual" "Manual not included in this build!";
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# Since the CD is read-only, the mount points must be on disk.
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cdMountPoints = pkgs.runCommand "mount-points" {} "
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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 root bin
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touch $out/${configuration.boot.rootLabel}
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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.runCommand "tarball" {inherit tarName;} "
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ensureDir $out
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(cd ${input} && tar cvfj $out/${tarName} . \\
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--exclude '*~' \\
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--exclude 'pkgs' --exclude 'result')
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";
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makeNixPkgsTarball = tarName: input: ((pkgs.runCommand "tarball" {inherit tarName;} "
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ensureDir $out
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(cd ${input}/.. && tar cvfj $out/${tarName} nixpkgs \\
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--exclude '*~' \\
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--exclude 'result')
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")+"/${tarName}");
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# Put the current directory in a tarball (making sure to filter
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# out crap like the .svn directories).
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nixosTarball =
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let filter = name: type:
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let base = baseNameOf (toString name);
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in base != ".svn" && base != "result";
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in
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makeTarball "nixos.tar.bz2" (builtins.filterSource filter ./..);
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# Get a recent copy of Nixpkgs.
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nixpkgsTarball = if networkNixpkgs != "" then pkgs.fetchurl {
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url = configuration.installer.nixpkgsURL + "/" + nixpkgsRel + ".tar.bz2";
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md5 = "6a793b877e2a4fa79827515902e1dfd8";
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} else makeNixPkgsTarball "nixpkgs.tar.bz2" /etc/nixos/nixpkgs;
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# The configuration file for Grub.
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grubCfg = pkgs.writeText "menu.lst" ''
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default 0
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timeout 10
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splashimage /boot/background.xpm.gz
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title NixOS Installer / Rescue
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kernel /boot/vmlinuz ${toString system.config.boot.kernelParams}
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initrd /boot/initrd
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''
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+ (if includeMemtest then
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''
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title Memtest86+
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kernel /boot/memtest.bin
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'' else "");
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# Create an ISO image containing the Grub boot loader, the kernel,
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# the initrd produced above, and the closure of the stage 2 init.
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rescueCD = import ../helpers/make-iso9660-image.nix {
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inherit (pkgs) stdenv perl cdrkit;
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isoName = "nixos-${platform}.iso";
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# Single files to be copied to fixed locations on the CD.
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contents = [
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{ source = "${pkgs.grub}/lib/grub/i386-pc/stage2_eltorito";
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target = "boot/grub/stage2_eltorito";
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}
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{ source = grubCfg;
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target = "boot/grub/menu.lst";
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}
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{ source = pkgs.kernel + "/vmlinuz";
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target = "boot/vmlinuz";
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}
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{ source = system.initialRamdisk + "/initrd";
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target = "boot/initrd";
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}
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{ source = system.config.boot.grubSplashImage;
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target = "boot/background.xpm.gz";
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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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++
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(lib.optional includeMemtest
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{ source = pkgs.memtest86 + "/memtest.bin";
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target = "boot/memtest.bin";
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}
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)
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;
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# Closures to be copied to the Nix store on the CD.
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storeContents = [
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{ object = system.bootStage2;
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symlink = "/init";
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}
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{ object = system.system;
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symlink = "/system";
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}
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]
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++
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(lib.optional includeStdenv
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# To speed up the installation, provide the full stdenv.
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{ object = pkgs.stdenv;
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symlink = "none";
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}
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)
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;
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buildStoreContents = []
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++
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(lib.optional includeBuildDeps
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{
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object = system.system.drvPath;
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symlink = "none";
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}
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)
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bootable = true;
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bootImage = "boot/grub/stage2_eltorito";
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};
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}
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