From 3b04de3a1dfd8ffe16021626570c430be1c37207 Mon Sep 17 00:00:00 2001
From: Himadri Bhattacharjee <107522312+lavafroth@users.noreply.github.com>
Date: Fri, 5 Apr 2024 12:17:33 +0530
Subject: [PATCH] feat: add flake autoupgrade support for rahu

---
 flake.nix                    |  3 ++-
 hosts/rahu/configuration.nix | 15 +++++++++++++--
 2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/flake.nix b/flake.nix
index e4623b3..d852125 100644
--- a/flake.nix
+++ b/flake.nix
@@ -13,7 +13,7 @@
     };
   };
 
-  outputs = { nixpkgs, home-manager, lanzaboote, ... }: {
+  outputs = inputs@{ self, nixpkgs, home-manager, lanzaboote, ... }: {
     formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.nixpkgs-fmt;
     nixosConfigurations = {
       cafe-nosecureboot = nixpkgs.lib.nixosSystem {
@@ -36,6 +36,7 @@
 
       rahu = nixpkgs.lib.nixosSystem {
         system = "x86_64-linux";
+        specialArgs = {inherit inputs;};
         modules = [
           ./hosts/rahu/configuration.nix
         ];
diff --git a/hosts/rahu/configuration.nix b/hosts/rahu/configuration.nix
index c98ad0d..f01c9eb 100644
--- a/hosts/rahu/configuration.nix
+++ b/hosts/rahu/configuration.nix
@@ -1,4 +1,4 @@
-{ config, pkgs, ... }:
+{ inputs, config, pkgs, ... }:
 
 {
   imports =
@@ -68,13 +68,24 @@
     "d /media/seed 1777 transmission transmission"
   ];
 
+  nix.settings.experimental-features = [ "nix-command" "flakes" ];
   nix.gc = {
     automatic = true;
     dates = "weekly";
     options = "--delete-older-than 14d";
   };
 
-  system.autoUpgrade.enable = true;
+  # system.autoUpgrade.enable = true;
+  system.autoUpgrade = {
+    enable = true;
+    flake = inputs.self.outPath;
+    flags = [
+      "--update-input"
+      "nixpkgs"
+      "--no-write-lock-file"
+      "-L"
+    ];
+  };
 
   # Define a user account. Don't forget to set a password with ‘passwd’.
   users.users.user = {