flake.nix

   1 {
   2   inputs = {
   3     doom-emacs.follows = "julm-nix/doom-emacs";
   4     home-manager.follows = "julm-nix/home-manager";
   5     julm-nix.inputs.nixpkgs.follows = "nixpkgs";
   6     julm-nix.url = "git+file:///home/julm/work/sourcephile/nix/julm-nix?ref=main";
   7     nix-formatter-pack.follows = "julm-nix/nix-formatter-pack";
   8     #nixpkgs.follows = "julm-nix/nixpkgs";
   9     nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.11";
  10     pre-commit-hooks.follows = "julm-nix/pre-commit-hooks";
  11   };
  12
  13   outputs = inputs:
  14     let
  15       remoteNixpkgsPatches = import (inputs.julm-nix + "/nixpkgs/patches.nix");
  16       localNixpkgsPatches = [
  17         #nixpkgs/patches/systemd-coredump.diff
  18       ];
  19       originPkgs = inputs.nixpkgs.legacyPackages."x86_64-linux";
  20       nixpkgsPath = originPkgs.applyPatches {
  21         name = "nixpkgs-patched";
  22         src = inputs.nixpkgs;
  23         patches = map originPkgs.fetchpatch remoteNixpkgsPatches ++ localNixpkgsPatches;
  24         postPatch = ''
  25           patch=$(printf '%s\n' ${builtins.concatStringsSep " "
  26              (map (p: p.sha256) remoteNixpkgsPatches ++ localNixpkgsPatches)} |
  27             sort | sha256sum | cut -c -7)
  28           echo "-patch-$patch" >.version-suffix
  29         '';
  30       };
  31       profile = "/nix/var/nix/profiles/system";
  32       inherit (inputs.nixpkgs) lib;
  33       #nixosSystem = lib.nixosSystem;
  34       nixosSystem = import (nixpkgsPath + "/nixos/lib/eval-config.nix");
  35       forAllSystems = f: lib.genAttrs lib.systems.flakeExposed (system: f rec {
  36         inherit system;
  37         #pkgs = inputs.nixpkgs.legacyPackages.${system};
  38         pkgs = import nixpkgsPath {
  39           inherit system;
  40           overlays =
  41             import nixpkgs/overlays.nix ++
  42             import (inputs.julm-nix + "/nixpkgs/overlays.nix");
  43         };
  44       });
  45     in
  46     {
  47       # nix -L build .#hello
  48       packages = forAllSystems (args: with args; pkgs);
  49
  50       # nix -L build .#nixosConfigurations.mermet.config.system.build.toplevel
  51       # nix -L build .#nixosConfigurations.mermet.config.boot.kernelPackages.kernel.configfile
  52       # nix -L build .#nixosConfigurations.mermet.pkgs.hello
  53       # nix eval --raw .#nixosConfigurations.mermet.config.networking.nftables.ruleset
  54       nixosConfigurations = lib.genAttrs
  55         (builtins.attrNames (lib.filterAttrs (_n: v: v == "directory") (builtins.readDir (inputs.self + "/hosts"))))
  56         (hostName: nixosSystem
  57           {
  58             system = null;
  59             specialArgs = {
  60               # Required to avoid infinite recursion
  61               # when `inputs` is used in `imports`.
  62               inherit inputs;
  63             };
  64             modules = [
  65               nixos/default.nix
  66               (inputs.self + "/hosts/${hostName}.nix")
  67               {
  68                 _module.args = {
  69                   inherit hostName;
  70                   hosts = inputs.self.nixosConfigurations;
  71                   host = inputs.self.nixosConfigurations.${hostName}._module.args;
  72                   info = import ./info.nix;
  73                 };
  74                 nixpkgs.overlays =
  75                   import nixpkgs/overlays.nix ++
  76                   import (inputs.julm-nix + "/nixpkgs/overlays.nix");
  77                 #nixpkgs.buildPlatform = "x86_64-linux";
  78                 nixpkgs.config.allowUnfreePredicate = pkg: builtins.elem (lib.getName pkg) [ "hplip" ];
  79               }
  80               inputs.nixpkgs.nixosModules.notDetected
  81               inputs.home-manager.nixosModules.home-manager
  82               {
  83                 home-manager.useGlobalPkgs = true;
  84                 home-manager.useUserPackages = true;
  85                 home-manager.verbose = true;
  86                 home-manager.backupFileExtension = null;
  87                 home-manager.extraSpecialArgs = {
  88                   inherit hostName inputs;
  89                 };
  90               }
  91               {
  92                 programs.ssh.knownHosts = {
  93                   carotte = {
  94                     extraHostNames = [ "carotte" "carotte.sourcephile.fr" ];
  95                     publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKnnS0w9zm5KuWwlfJu+qEXC0asESQySPp76szyMTE3J";
  96                   };
  97                   mermet = {
  98                     extraHostNames = [ "mermet" "mermet.sourcephile.fr" ];
  99                     publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIFvKN2sIpH782MFjaOpcty1Hs/T/TPNJpXI08H3O3oxl";
 100                   };
 101                   losurdo = {
 102                     extraHostNames = [ "losurdo" "losurdo.sourcephile.fr" ];
 103                     publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIHJkAq1T0Dxozt4RPylvWrUmeuejiG+n/owb3ucnWP9F";
 104                   };
 105                 };
 106               }
 107             ];
 108           }
 109         );
 110
 111       # nix -L develop  or  direnv allow
 112       devShell = forAllSystems ({ pkgs, system, ... }: pkgs.callPackage ./shell.nix
 113         {
 114           inherit pkgs inputs system nixpkgsPath;
 115           inherit (inputs.self.checks.${system}.pre-commit-check) shellHook;
 116         });
 117
 118       # nix -L run .#mermet.switch
 119       apps = forAllSystems ({ pkgs, system, ... }:
 120         with builtins;
 121         mapAttrs
 122           (hostName: { config, pkgs, ... }:
 123             let
 124               inherit (config.system) build;
 125               scriptApp = scriptName: ps: script: {
 126                 type = "app";
 127                 program = (pkgs.writeShellScript "${hostName}-${scriptName}" ''
 128                   export PATH="${lib.makeBinPath ([ pkgs.coreutils ] ++ ps)}:$PATH"
 129                   set -eux
 130                   ${script}
 131                 '').outPath;
 132               };
 133             in
 134             {
 135               # Example: nix run .#mermet.switch
 136               "switch" = scriptApp "switch" [ ] (
 137                 ''
 138                   set -o pipefail
 139                   shopt -s globstar
 140
 141                   chmod -R g-rwx,o-rwx **/*.gpg
 142                   trap 'git reset **/*.gpg' EXIT
 143                   git rm -rf --cached --ignore-unmatch **/*.gpg # prevent copying to /nix/store
 144
 145                   nix-store --add-root hosts/${hostName}.nixpkgs --indirect --realise ${nixpkgsPath}
 146                   nix-store --add-root hosts/${hostName}.root --indirect --realise ${build.toplevel}
 147
 148                   nix copy --to ssh://${config.install.target}${lib.optionalString config.install.substituteOnDestination " --substitute-on-destination"} ${build.toplevel}
 149
 150                   ${config.security.initrd.install}
 151
 152                   if ssh ${config.install.target} set -x ';' \
 153                     systemctl reset-failed nixos-fallback '2>/dev/null' ';' \
 154                     test "''${NO_NIXOS_FALLBACK:+set}" '||' \
 155                     systemd-run -u nixos-fallback --description=nixos-fallback /bin/sh -xc '''\'''
 156                       PATH=${with pkgs; lib.makeBinPath [ coreutils nix systemd ]}
 157                       sleep $((10 * 60))
 158                       ${profile}/bin/switch-to-configuration switch
 159                       systemctl reboot
 160                     '\'''' '&&' \
 161                     ${build.toplevel}/bin/switch-to-configuration test
 162                   then
 163                     ssh ${config.install.target} -o ControlPath=none set -x ';' \
 164                       systemctl stop nixos-fallback.service ';' \
 165                       nix-env --profile ${profile} --set '${build.toplevel}' ';' \
 166                       ${build.toplevel}/bin/switch-to-configuration boot '&&' \
 167                       nix-env --delete-generations 7d --profile ${profile}
 168                   else
 169                     tput rev
 170                     echo WARNING: switch-to-configuration was not registered at boot
 171                     tput sgr0
 172                     ssh ${config.install.target} -o ControlPath=none set -x ';' \
 173                       systemctl stop nixos-fallback.service
 174                     false
 175                   fi
 176                 ''
 177               );
 178               # Example: nix run .#carotte.install-sd
 179               # DELETEME: quite useless, better to use nixos-install
 180               "install-sd" = scriptApp "install-sd" [ pkgs.zstd ] ''
 181                 set -o pipefail
 182                 nix-store --add-root hosts/${hostName}.root --indirect --realise ${build.sdImage}
 183                 unzstd --stdout ${build.sdImage}/sd-image/*.img.zst |
 184                 sudo -k dd conv=notrunc oflag=direct,sync status=progress of="''${1:-/dev/mmcblk0}"
 185               '';
 186             }
 187           )
 188           inputs.self.nixosConfigurations
 189       );
 190
 191       # nix flake check
 192       checks = forAllSystems (args: with args; {
 193         pre-commit-check = inputs.pre-commit-hooks.lib.${system}.run {
 194           src = inputs.self;
 195           hooks = {
 196             nixpkgs-fmt.enable = true;
 197           };
 198         };
 199       });
 200
 201       # nix fmt
 202       formatter = forAllSystems ({ pkgs, ... }:
 203         inputs.nix-formatter-pack.lib.mkFormatter {
 204           inherit pkgs;
 205           config = {
 206             tools = {
 207               deadnix.enable = true;
 208               nixpkgs-fmt.enable = true;
 209               statix.enable = true;
 210             };
 211           };
 212         }
 213       );
 214
 215     };
 216 }