Add automatic NVIDIA package builder

.github/workflows/nvidia.yaml

@@ -0,0 +1,42 @@
+name: Build NVIDIA stuff every day at 3:00
+
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: "0 3 * * *"
+
+jobs:
+  main:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name: Checkout the repo
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.head_ref }}
+
+      - name: Install Nix
+        uses: cachix/install-nix-action@v25
+        with:
+          extra_nix_config: |
+            substituters = https://42loco42.cachix.org https://cache.nixos.org
+            trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY= 42loco42.cachix.org-1:6HvWFER3RdTSqEZDznqahkqaoI6QCOiX2gRpMMsThiQ=
+
+      - name: Update, build, push
+        run: |
+          old="$(sha256sum flake.lock)"
+          nix flake update nixpkgs-new
+          new="$(sha256sum flake.lock)"
+
+          if [ "$old" != "$new" ]; then
+            export NIXPKGS_ALLOW_UNFREE=1
+            nix run -L --impure .#nvidia
+          fi
+        env:
+          CACHIX_AUTH_TOKEN: ${{ secrets.CACHIX_AUTH_TOKEN }}
+
+      - name: Commit flake updates
+        uses: stefanzweifel/git-auto-commit-action@v5
+        with:
+          commit_message: "Automatic update of nixpkgs-new"

flake.nix

@@ -7,9 +7,12 @@
 
     # nsc.url = "github:snowfallorg/nix-software-center";
     # nsc.inputs.nixpkgs.follows = "nixpkgs";
+
+    nixpkgs.url = "github:nixos/nixpkgs/a0c9e3aee1000ac2bfb0e5b98c94c946a5d180a9";
+    nixpkgs-new.url = "github:nixos/nixpkgs/nixpkgs-unstable";
   };
 
-  outputs = { self, nixpkgs }:
+  outputs = { self, nixpkgs, nixpkgs-new }:
     let
       inherit (nixpkgs.lib) mapAttrsToList pipe recursiveUpdate;
 
@@ -173,6 +176,33 @@
             | cachix push 42loco42
           '';
         };
+
+        nvidia =
+          let
+            targets = with (import nixpkgs-new { inherit (pkgs) system; }); [
+              linuxPackages.nvidiaPackages.stable
+              linuxPackages.nvidiaPackages.stable.persistenced
+              linuxPackages.nvidiaPackages.stable.settings
+              nvtopPackages.nvidia
+            ];
+
+            paths = pipe targets [
+              (pkgs.linkFarmFromDrvs "nvidia")
+              (x: pipe x [
+                builtins.readDir
+                builtins.attrNames
+                (map (n: x + "/" + n))
+                (builtins.concatStringsSep " ")
+              ])
+            ];
+          in
+          pkgs.writeShellApplication {
+            name = "nvidia";
+            runtimeInputs = with pkgs; [ cachix ];
+            text = ''
+              cachix push 42loco42 ${paths}
+            '';
+          };
       }
     ];
 }