flake.nix

   1 {
   2 # Pin down nixpkgs from github, instead of using global, system or user registries.
   3 inputs.nixpkgs.url = "github:NixOS/nixpkgs/6b342809b1b66dce758364f763b64c6a1a9e6211";
   4 #inputs.nixpkgs.url = "flake:nixpkgs";
   5 inputs.flake-utils.url = "github:numtide/flake-utils";
   6 inputs.shell = { type = "path"; path = "./shell"; flake = false; };
   7 inputs.secrets = { type = "path"; path = "./sec"; flake = false; };
   8 inputs.pass = { type = "path"; path = "./pass"; flake = false; };
   9 outputs = inputs: let
  10   remoteNixpkgsPatches = import nixpkgs/patches.nix;
  11   localNixpkgsPatches = [
  12     nixpkgs/patches/apparmor.diff
  13     #nixpkgs/patches/public-inbox.diff
  14     #nixpkgs/patches/zerobin.diff
  15     #nixpkgs/patches/gitolite.diff
  16     #nixpkgs/patches/tor.diff
  17     #nixpkgs/patches/freeciv.diff
  18     #nixpkgs/patches/fix-ld-nix.diff
  19     #nixpkgs/patches/fix-ld-nix-apparmor.diff
  20   ];
  21   originPkgs = inputs.nixpkgs.legacyPackages."x86_64-linux";
  22   nixpkgs = originPkgs.applyPatches {
  23     name = "nixpkgs-patched";
  24     src = inputs.nixpkgs;
  25     patches = map originPkgs.fetchpatch remoteNixpkgsPatches ++ localNixpkgsPatches;
  26     postPatch = ''
  27       patch=$(printf '%s\n' ${builtins.concatStringsSep " "
  28          (map (p: p.sha256) remoteNixpkgsPatches ++ localNixpkgsPatches)} |
  29         sort | sha256sum | cut -c -7)
  30       echo "+patch-$patch" >.version-suffix
  31     '';
  32   };
  33   lib = originPkgs.lib;
  34   machines = builtins.mapAttrs (machineName: machineConfig:
  35     let cfg = import machineConfig { inherit inputs; }; in
  36     import (nixpkgs + "/nixos/lib/eval-config.nix") (cfg // {
  37       extraArgs = {
  38         inherit machineName inputs;
  39         machines = inputs.self.nixosConfigurations;
  40       } // (cfg.extraArgs or {});
  41       modules = cfg.modules ++ [({pkgs, ...}: {
  42         nix.registry.nixpkgs.flake = nixpkgs;
  43         nix.package = pkgs.nixUnstable;
  44         nix.extraOptions = "experimental-features = nix-command flakes";
  45         nixpkgs.overlays = import nixpkgs/overlays.nix;
  46         system.nixos.versionSuffix = ".${
  47           lib.substring 0 8 (inputs.self.lastModifiedDate or inputs.self.lastModified)}.${
  48           inputs.self.shortRev or "dirty"}";
  49         system.nixos.revision = lib.mkIf (inputs.self ? rev) inputs.self.rev;
  50         # Let 'nixos-version --json' know about the Git revision of this flake.
  51         system.configurationRevision = lib.mkIf (inputs.self ? rev) inputs.self.rev;
  52         boot.initrd.network.ssh.hostKeys = [ "/root/initrd/ssh.key" ];
  53         security.gnupg.agent.enable = true;
  54         security.gnupg.store = inputs.pass + "/machines/${machineName}";
  55         /*
  56         system.configurationRevision =
  57           if inputs.self ? rev
  58           then inputs.self.rev
  59           else throw "Refusing to build from a dirty Git tree!";
  60         */
  61         programs.ssh.knownHosts = {
  62           mermet = {
  63             hostNames = [ "mermet" "mermet.sourcephile.fr" ];
  64             publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIFvKN2sIpH782MFjaOpcty1Hs/T/TPNJpXI08H3O3oxl";
  65           };
  66           losurdo = {
  67             hostNames = [ "losurdo" "losurdo.sourcephile.fr" ];
  68             publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIHJkAq1T0Dxozt4RPylvWrUmeuejiG+n/owb3ucnWP9F";
  69           };
  70         };
  71       })];
  72     }));
  73   in
  74   {
  75     # nix -L build .#nixosConfigurations.${machineName}.config.system.build.toplevel
  76     nixosConfigurations = machines {
  77       losurdo = machines/losurdo.nix;
  78       mermet  = machines/mermet.nix;
  79     };
  80     #nixosModule = import nixos/modules.nix;
  81   }
  82   // inputs.flake-utils.lib.eachDefaultSystem (system:
  83     #let pkgs = inputs.nixpkgs.legacyPackages.${system}; in
  84     let
  85       pkgs = import nixpkgs {
  86         inherit system;
  87         overlays = import nixpkgs/overlays.nix;
  88       };
  89     in {
  90     legacyPackages = pkgs;
  91     devShell = import ./shell.nix { inherit inputs pkgs; };
  92     apps = builtins.mapAttrs (machineName: { config, ... }: let
  93       system = config.system.build.toplevel;
  94       target = "root@${config.networking.hostName}.${config.networking.domain}";
  95       profile = "/nix/var/nix/profiles/system";
  96       in rec {
  97       # Example: nix run .#losurdo.switch
  98       "switch" = {
  99         type = "app";
 100         program = (pkgs.writeShellScript "switch" ''
 101           set -eux
 102           set -o pipefail
 103           nix-store --add-root machines/${machineName}.root --indirect --realise ${system}
 104           nix copy --to ssh://'${target}' --substitute-on-destination ${system}
 105           ${sendkeys.program}
 106           # Send the SSH key of the initrd
 107           gpg --decrypt '${config.security.gnupg.store}/initrd/ssh.key.gpg' |
 108           ssh '${target}' install -D -m 400 -o root -g root /dev/stdin /root/initrd/ssh.key
 109           # Send the Wireguard key of the initrd
 110           gpg --decrypt '${config.security.gnupg.store}/wireguard/wg-intra/privateKey.gpg' |
 111           ssh '${target}' install -D -m 400 -o root -g root /dev/stdin /root/initrd/wg-intra.key
 112           ssh '${target}' \
 113             nix-env --profile '${profile}' --set '${system}' '&&' \
 114             '${profile}'/bin/switch-to-configuration switch
 115         '').outPath;
 116       };
 117       # Example: nix run .#losurdo.sendkeys
 118       "sendkeys" = {
 119         type = "app";
 120         program = config.security.gnupg.agent.sendKeys + "/bin/gnupg-agent-sendKeys";
 121       };
 122     }) inputs.self.nixosConfigurations;}
 123   );
 124 }