From 5643877cc1700ac3ea97a9940a423ce9e5dac920 Mon Sep 17 00:00:00 2001
From: Alexander Tomokhov <alexoundos@gmail.com>
Date: Wed, 27 Sep 2023 23:43:45 +0400
Subject: [PATCH] flake: embed NixOS configuration git commit sha1 into
 nixos.label

---
 flake.nix | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/flake.nix b/flake.nix
index 6e83088..05c23d1 100644
--- a/flake.nix
+++ b/flake.nix
@@ -22,6 +22,10 @@
     }:
     let
       system = "x86_64-linux";
+      cfgShortRev =
+        if self ? rev then builtins.substring 0 7 self.rev else "dirty";
+      nixosLabel = config:
+        "${cfgShortRev}.${config.system.nixos.release}.${nixpkgs.shortRev}";
       userdata = builtins.fromJSON (builtins.readFile userdata-json);
       hardware-configuration = import hardware-configuration-nix;
     in
@@ -30,9 +34,14 @@
         just-nixos = nixpkgs.lib.nixosSystem {
           specialArgs = { inherit system userdata; };
           modules = [
+            # SelfPrivacy overlay
             { nixpkgs.overlays = [ selfprivacy-overlay.overlay ]; }
+            # machine specifics
             hardware-configuration
+            # main configuration part
             ./configuration.nix
+            # we need to embed NixOS repository git commit sha1
+            ({ config, ... }: { system.nixos.label = nixosLabel config; })
           ];
         };
       };