feat: experimental k3s + nix-snapshotter snippet

this allows them to be reused more easily

nix/os/devices/steveej-x13s/configuration.nix

@@ -157,40 +157,7 @@
 
     ../../snippets/holo-zerotier.nix
 
-    # experiment with k3s, nix-snapshotter, and nixos images
-    {
-      # (1) Import nixos module.
-      imports = [
-        nodeFlake.inputs.nix-snapshotter.nixosModules.default
-      ];
-
-      # (2) Add overlay.
-      nixpkgs.overlays = [nodeFlake.inputs.nix-snapshotter.overlays.default];
-
-      # (3) Enable service.
-      virtualisation.containerd = {
-        enable = true;
-        k3sIntegration = false;
-        nixSnapshotterIntegration = true;
-
-        # TODO: understand if this has an influence on the systemd LoadCredential issue
-        settings.plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc.options.SystemdCgroup = lib.mkForce true;
-      };
-      services.nix-snapshotter = {
-        enable = true;
-      };
-
-      # (4) Add a containerd CLI like nerdctl.
-      environment.systemPackages = [
-        pkgs.nerdctl
-        nodeFlake.inputs.nix-snapshotter.packages.${system}.nix-snapshotter
-      ];
-
-      services.k3s = {
-        enable = false;
-        setKubeConfig = true;
-      };
-    }
+    ../../snippets/k3s-w-nix-snapshotter.nix
   ];
 
   networking.hostName = nodeName;

nix/os/devices/steveej-x13s/flake.lock

@@ -1,21 +1,5 @@
 {
   "nodes": {
-    "ath11k-firmware": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1720482684,
-        "narHash": "sha256-p6ifwtRNUOyQ2FN2VhSXS6dcrvrtiFZawu/iVXQ4uR0=",
-        "ref": "refs/heads/main",
-        "rev": "bb527dcebac835c47ed4f5428a7687769fa9b1b2",
-        "revCount": 152,
-        "type": "git",
-        "url": "https://git.codelinaro.org/clo/ath-firmware/ath11k-firmware.git"
-      },
-      "original": {
-        "type": "git",
-        "url": "https://git.codelinaro.org/clo/ath-firmware/ath11k-firmware.git"
-      }
-    },
     "crane": {
       "inputs": {
         "nixpkgs": [
@@ -178,22 +162,6 @@
         "type": "github"
       }
     },
-    "mobile-nixos": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1722056346,
-        "narHash": "sha256-50fcuCppaLMfSOTFO4IkCBs4folToCwlhTgc6IdZFHg=",
-        "owner": "NixOS",
-        "repo": "mobile-nixos",
-        "rev": "717ce90cfadffa449480bae2e155185c651e9993",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "repo": "mobile-nixos",
-        "type": "github"
-      }
-    },
     "mycelium": {
       "inputs": {
         "crane": "crane",
@@ -350,11 +318,9 @@
     },
     "root": {
       "inputs": {
-        "ath11k-firmware": "ath11k-firmware",
         "disko": "disko",
         "get-flake": "get-flake",
         "home-manager": "home-manager",
-        "mobile-nixos": "mobile-nixos",
         "mycelium": "mycelium",
         "nix-snapshotter": "nix-snapshotter",
         "nixos-x13s": "nixos-x13s",

nix/os/devices/steveej-x13s/flake.nix

@@ -26,19 +26,12 @@
       # url = "github:pdtpartners/nix-snapshotter";
       inputs.nixpkgs.follows = "nixpkgs";
     };
-
-    nix-snapshotter = {
-      url = "github:yu-re-ka/nix-snapshotter";
-      # url = "github:pdtpartners/nix-snapshotter";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
   };
 
   outputs = {
     self,
     get-flake,
     nixpkgs,
-    ath11k-firmware,
     ...
   }: let
     targetPlatform = "aarch64-linux";

nix/os/snippets/k3s-w-nix-snapshotter.nix

@@ -0,0 +1,41 @@
+# experiment with k3s, nix-snapshotter, and nixos images
+{
+  nodeFlake,
+  nodeFlakeInputs',
+  pkgs,
+  lib,
+  system,
+  ...
+}: {
+  # (1) Import nixos module.
+  imports = [
+    nodeFlake.inputs.nix-snapshotter.nixosModules.default
+  ];
+
+  # (2) Add overlay.
+  nixpkgs.overlays = [nodeFlake.inputs.nix-snapshotter.overlays.default];
+
+  # (3) Enable service.
+  virtualisation.containerd = {
+    enable = true;
+    k3sIntegration = false;
+    nixSnapshotterIntegration = true;
+
+    # TODO: understand if this has an influence on the systemd LoadCredential issue
+    settings.plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc.options.SystemdCgroup = lib.mkForce true;
+  };
+  services.nix-snapshotter = {
+    enable = true;
+  };
+
+  # (4) Add a containerd CLI like nerdctl.
+  environment.systemPackages = [
+    pkgs.nerdctl
+    nodeFlake.inputs.nix-snapshotter.packages.${system}.default
+  ];
+
+  services.k3s = {
+    enable = false;
+    setKubeConfig = true;
+  };
+}