flake.nix

   1 {
   2 # Pin down nixpkgs from github, instead of using global, system or user registries.
   3 inputs.nixpkgs.url = "github:NixOS/nixpkgs/3a8d7958a610cd3fec3a6f424480f91a1b259185";
   4 #inputs.nixpkgs.url = "flake:nixpkgs";
   5 inputs.flake-utils.url = "github:numtide/flake-utils";
   6 inputs.home-manager.follows = "julm-nix/home-manager";
   7 inputs.julm-nix.url = "git://git.sourcephile.fr/julm/julm-nix?ref=master";
   8 #inputs.julm-nix.url = "path:julm-nix"; # XXX: this puts the whole folder in the Nix store
   9 inputs.julm-nix.inputs.flake-utils.follows = "flake-utils";
  10 inputs.julm-nix.inputs.nixpkgs.follows = "nixpkgs";
  11 inputs.shell = { type = "path"; path = "./shell"; flake = false; };
  12 inputs.secrets = { type = "path"; path = "./sec"; flake = false; };
  13 inputs.pass = { type = "path"; path = "./pass"; flake = false; };
  14 outputs = inputs: let
  15   remoteNixpkgsPatches = import nixpkgs/patches.nix;
  16   localNixpkgsPatches = [
  17     #nixpkgs/patches/transmission.diff
  18     #nixpkgs/patches/apparmor.diff
  19     #nixpkgs/patches/ifcopenshell.diff
  20     #nixpkgs/patches/public-inbox.diff
  21     #nixpkgs/patches/zerobin.diff
  22     #nixpkgs/patches/gitolite.diff
  23     #nixpkgs/patches/tor.diff
  24     #nixpkgs/patches/freeciv.diff
  25     #nixpkgs/patches/fix-ld-nix.diff
  26     #nixpkgs/patches/fix-ld-nix-apparmor.diff
  27   ];
  28   originPkgs = inputs.nixpkgs.legacyPackages."x86_64-linux";
  29   nixpkgs = originPkgs.applyPatches {
  30     name = "nixpkgs-patched";
  31     src = inputs.nixpkgs;
  32     patches = map originPkgs.fetchpatch remoteNixpkgsPatches ++ localNixpkgsPatches;
  33     postPatch = ''
  34       patch=$(printf '%s\n' ${builtins.concatStringsSep " "
  35          (map (p: p.sha256) remoteNixpkgsPatches ++ localNixpkgsPatches)} |
  36         sort | sha256sum | cut -c -7)
  37       echo "+patch-$patch" >.version-suffix
  38     '';
  39   };
  40   lib = originPkgs.lib;
  41   hosts = builtins.mapAttrs (hostName: hostConfig:
  42     let cfg = import hostConfig { inherit inputs; }; in
  43     import (nixpkgs + "/nixos/lib/eval-config.nix") (cfg // {
  44       extraArgs = {
  45         inherit hostName inputs;
  46         hosts = inputs.self.nixosConfigurations;
  47         host = inputs.self.nixosConfigurations.${hostName}.extraArgs;
  48       } // (cfg.extraArgs or {});
  49       modules = cfg.modules ++ [
  50         inputs.home-manager.nixosModules.home-manager
  51         {
  52           home-manager.useGlobalPkgs = true;
  53           home-manager.useUserPackages = true;
  54         }
  55         ({pkgs, ...}: {
  56           nix.registry.nixpkgs.flake = nixpkgs;
  57           nix.package = pkgs.nixUnstable;
  58           nix.extraOptions = "experimental-features = nix-command flakes";
  59           nixpkgs.overlays =
  60             import nixpkgs/overlays.nix ++
  61             import (inputs.julm-nix + "/nixpkgs/overlays.nix");
  62           system.nixos.versionSuffix = ".${
  63             lib.substring 0 8 (inputs.self.lastModifiedDate or inputs.self.lastModified)}.${
  64             inputs.self.shortRev or "dirty"}";
  65           system.nixos.revision = lib.mkIf (inputs.self ? rev) inputs.self.rev;
  66           # Let 'nixos-version --json' know about the Git revision of this flake.
  67           system.configurationRevision = lib.mkIf (inputs.self ? rev) inputs.self.rev;
  68           boot.initrd.network.ssh.hostKeys = [ "/root/initrd/ssh.key" ];
  69           security.gnupg.agent.enable = true;
  70           security.gnupg.store = inputs.pass + "/hosts/${hostName}";
  71           /*
  72           system.configurationRevision =
  73             if inputs.self ? rev
  74             then inputs.self.rev
  75             else throw "Refusing to build from a dirty Git tree!";
  76           */
  77           programs.ssh.knownHosts = {
  78             mermet = {
  79               hostNames = [ "mermet" "mermet.sourcephile.fr" ];
  80               publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIFvKN2sIpH782MFjaOpcty1Hs/T/TPNJpXI08H3O3oxl";
  81             };
  82             losurdo = {
  83               hostNames = [ "losurdo" "losurdo.sourcephile.fr" ];
  84               publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIHJkAq1T0Dxozt4RPylvWrUmeuejiG+n/owb3ucnWP9F";
  85             };
  86           };
  87         })
  88       ];
  89     }));
  90   in
  91   {
  92     # nix -L build .#nixosConfigurations.${hostName}.config.system.build.toplevel
  93     nixosConfigurations = hosts {
  94       losurdo = hosts/losurdo.nix;
  95       mermet  = hosts/mermet.nix;
  96     };
  97     #nixosModule = import nixos/modules.nix;
  98   }
  99   // inputs.flake-utils.lib.eachDefaultSystem (system:
 100     #let pkgs = inputs.nixpkgs.legacyPackages.${system}; in
 101     let
 102       pkgs = import nixpkgs {
 103         inherit system;
 104         overlays =
 105           import nixpkgs/overlays.nix ++
 106           import (inputs.julm-nix + "/nixpkgs/overlays.nix");
 107       };
 108     in {
 109     legacyPackages = pkgs;
 110     devShell = import ./shell.nix { inherit inputs pkgs; };
 111     apps = builtins.mapAttrs (hostName: { config, ... }: let
 112       system = config.system.build.toplevel;
 113       target = "root@${config.networking.hostName}.${config.networking.domain}";
 114       profile = "/nix/var/nix/profiles/system";
 115       in rec {
 116       # Example: nix run .#losurdo.switch
 117       "switch" = {
 118         type = "app";
 119         program = (pkgs.writeShellScript "switch" ''
 120           set -eux
 121           set -o pipefail
 122           nix-store --add-root hosts/${hostName}.root --indirect --realise ${system}
 123           nix copy --to ssh://'${target}' --substitute-on-destination ${system}
 124           ${sendkeys.program}
 125           # Send the SSH key of the initrd
 126           gpg --decrypt '${config.security.gnupg.store}/initrd/ssh.key.gpg' |
 127           ssh '${target}' install -D -m 400 -o root -g root /dev/stdin /root/initrd/ssh.key
 128           # Send the Wireguard key of the initrd
 129           gpg --decrypt '${config.security.gnupg.store}/wireguard/wg-intra/privateKey.gpg' |
 130           ssh '${target}' install -D -m 400 -o root -g root /dev/stdin /root/initrd/wg-intra.key
 131           ssh '${target}' \
 132             nix-env --profile '${profile}' --set '${system}' '&&' \
 133             '${profile}'/bin/switch-to-configuration switch
 134         '').outPath;
 135       };
 136       # Example: nix run .#losurdo.sendkeys
 137       "sendkeys" = {
 138         type = "app";
 139         #program = config.security.gnupg.agent.sendKeys + "/bin/gnupg-agent-sendKeys";
 140         program = (pkgs.writeShellScript "sendkeys" ''
 141           set -eux
 142           ${pkgs.bash}/bin/bash -eux ${config.security.gnupg.agent.sendKeys + "/bin/gnupg-agent-sendKeys"}
 143         '').outPath;
 144       };
 145     }) inputs.self.nixosConfigurations;}
 146   );
 147 }