package nixos-facter for stable as well

nix/installer.nix

@@ -34,7 +34,9 @@
     # for copying extra files of nixos-anywhere
     pkgs.rsync
     # alternative to nixos-generate-config
-  ] ++ lib.optional (pkgs ? nixos-facter) pkgs.nixos-facter;
+    # TODO: use nixpkgs again after next nixos release
+    (pkgs.callPackage ./nixos-facter.nix {})
+  ];
 
   # Don't add nixpkgs to the image to save space, for our intended use case we don't need it
   system.installer.channel.enable = false;

nix/nixos-facter.nix

@@ -0,0 +1,72 @@
+{
+  lib,
+  buildGoModule,
+  fetchFromGitHub,
+  hwinfo,
+  libusb1,
+  gcc,
+  pkg-config,
+  util-linux,
+  pciutils,
+  stdenv,
+}:
+let
+  # We are waiting on some changes to be merged upstream: https://github.com/openSUSE/hwinfo/pulls
+  hwinfoOverride = hwinfo.overrideAttrs {
+    src = fetchFromGitHub {
+      owner = "numtide";
+      repo = "hwinfo";
+      rev = "a559f34934098d54096ed2078e750a8245ae4044";
+      hash = "sha256-3abkWPr98qXXQ17r1Z43gh2M5hl/DHjW2hfeWl+GSAs=";
+    };
+  };
+in
+buildGoModule rec {
+  pname = "nixos-facter";
+  version = "0.1.0pre";
+
+  # https://github.com/numtide/nixos-facter/pull/120
+  src = fetchFromGitHub {
+    owner = "numtide";
+    repo = "nixos-facter";
+    rev = "f16b36d8d4c80db4b8bc96be090749bbeeb66364";
+    hash = "sha256-5Gnn2ta/xuht6K8M9weVC0yPw5Wq8AK6wAHmjd1m2i0=";
+  };
+
+  vendorHash = "sha256-5leiTNp3FJmgFd0SKhu18hxYZ2G9SuQPhZJjki2SDVs=";
+
+  CGO_ENABLED = 1;
+
+  buildInputs = [
+    libusb1
+    hwinfoOverride
+  ];
+
+  nativeBuildInputs = [
+    gcc
+    pkg-config
+  ];
+
+  runtimeInputs = [
+    libusb1
+    util-linux
+    pciutils
+  ];
+
+  ldflags = [
+    "-s"
+    "-w"
+    "-X git.numtide.com/numtide/nixos-facter/build.Name=nixos-facter"
+    "-X git.numtide.com/numtide/nixos-facter/build.Version=v${version}"
+    "-X github.com/numtide/nixos-facter/pkg/build.System=${stdenv.hostPlatform.system}"
+  ];
+
+  meta = {
+    description = "Declarative hardware configuration for NixOS";
+    homepage = "https://github.com/numtide/nixos-facter";
+    license = lib.licenses.gpl3Plus;
+    maintainers = [ lib.maintainers.brianmcgee ];
+    mainProgram = "nixos-facter";
+    platforms = lib.platforms.linux;
+  };
+}