From f9c77b433ac00fd7d267f875f7f2a70b77cbdf0e Mon Sep 17 00:00:00 2001
From: Rodrigo Arias Mallo <rodrigo.arias@bsc.es>
Date: Sat, 2 Sep 2023 23:37:11 +0200
Subject: [PATCH] Store nixos config in /etc/nixos/config.rev

---
 m/common/main.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/m/common/main.nix b/m/common/main.nix
index f9141aa..25a209c 100644
--- a/m/common/main.nix
+++ b/m/common/main.nix
@@ -33,6 +33,9 @@
     then theFlake.rev
     else throw ("Refusing to build from a dirty Git tree!");
 
+  # Save the commit of the config in /etc/nixos/config.rev
+  environment.etc."nixos/config.rev".text = system.configurationRevision;
+
   environment.systemPackages = with pkgs; [
     vim wget git htop tmux pciutils tcpdump ripgrep nix-index nixos-option
     nix-diff ipmitool freeipmi ethtool lm_sensors ix cmake gnumake file tree