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disko/README.md
Jörg Thalheim 20bfa32750 disko: get rid of impure imports 
This is a backwards-incompatible change but it allows to pin nixpkgs,
which is desirable especially in professional environments where
reproduciblity is important.
2022-08-17 14:53:43 +02:00

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disko

nix-powered automatic disk partitioning

Usage

Master Boot Record

This is how your iso configuation may look like

/etc/nixos/tsp-disk.json (TODO: find the correct disk)

{
  "type": "devices",
  "content": {
    "sda": {
      "type": "table",
      "format": "msdos",
      "partitions": [{
        "type": "partition",
        "start": "1M",
        "end": "100%",
        "bootable": true,
        "content": {
          "type": "filesystem",
          "format": "ext4",
          "mountpoint": "/"
        }
      }]
    }
  }
}

/etc/nixos/configuration.nix

{ pkgs, modulesPath, ... }:
let
  disko = builtins.fetchGit {
    url = https://cgit.lassul.us/disko/;
    rev = "88f56a0b644dd7bfa8438409bea5377adef6aef4";
  };
  cfg = builtins.fromJSON ./tsp-disk.json;
in {
  imports = [
    (modulesPath + "/installer/cd-dvd/installation-cd-minimal.nix")
  ];
  environment.systemPackages = with pkgs;[
    (pkgs.writeScriptBin "tsp-create" (disko.create cfg))
    (pkgs.writeScriptBin "tsp-mount" (disko.mount cfg))
  ];
  ## Optional: Automatically creates a service which runs at startup to perform the partitioning
  #systemd.services.install-to-hd = {
  #  enable = true;
  #  wantedBy = ["multi-user.target"];
  #  after = ["getty@tty1.service" ];
  #  serviceConfig = {
  #    Type = "oneshot";
  #    ExecStart = [ (disko.create cfg) (disk.mount cfg) ];
  #    StandardInput = "null";
  #    StandardOutput = "journal+console";
  #    StandardError = "inherit";
  #  };
  #};
}

After nixos-rebuild switch this will add a tsp-create and a tsp-mount command:

  • tsp-create: creates & formats the partitions according to tsp-disk.json
  • tsp-mount: mounts the partitions to /mnt

GUID Partition Table, LVM and dm-crypt

See examples/