added checks and formatting pre-commit hooks

.gitignore

@@ -0,0 +1 @@
+.pre-commit-config.yaml

flake.lock

@@ -1,24 +1,114 @@
 {
   "nodes": {
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1767039857,
+        "narHash": "sha256-vNpUSpF5Nuw8xvDLj2KCwwksIbjua2LZCqhV1LNRDns=",
+        "owner": "NixOS",
+        "repo": "flake-compat",
+        "rev": "5edf11c44bc78a0d334f6334cdaf7d60d732daab",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "git-hooks": {
+      "inputs": {
+        "flake-compat": "flake-compat",
+        "gitignore": "gitignore",
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "lastModified": 1772024342,
+        "narHash": "sha256-+eXlIc4/7dE6EcPs9a2DaSY3fTA9AE526hGqkNID3Wg=",
+        "owner": "cachix",
+        "repo": "git-hooks.nix",
+        "rev": "6e34e97ed9788b17796ee43ccdbaf871a5c2b476",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cachix",
+        "repo": "git-hooks.nix",
+        "type": "github"
+      }
+    },
+    "gitignore": {
+      "inputs": {
+        "nixpkgs": [
+          "git-hooks",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1709087332,
+        "narHash": "sha256-HG2cCnktfHsKV0s4XW83gU3F57gaTljL9KNSuG6bnQs=",
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "rev": "637db329424fd7e46cf4185293b9cc8c88c95394",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "gitignore.nix",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1771848320,
+        "lastModified": 1770073757,
-        "narHash": "sha256-0MAd+0mun3K/Ns8JATeHT1sX28faLII5hVLq0L3BdZU=",
+        "narHash": "sha256-Vy+G+F+3E/Tl+GMNgiHl9Pah2DgShmIUBJXmbiQPHbI=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "47472570b1e607482890801aeaf29bfb749884f6",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1772047000,
+        "narHash": "sha256-7DaQVv4R97cii/Qdfy4tmDZMB2xxtyIvNGSwXBBhSmo=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "2fc6539b481e1d2569f25f8799236694180c0993",
+        "rev": "1267bb4920d0fc06ea916734c11b0bf004bbe17e",
         "type": "github"
       },
       "original": {
         "owner": "nixos",
-        "ref": "nixos-unstable",
+        "ref": "nixos-25.11",
         "repo": "nixpkgs",
         "type": "github"
       }
     },
     "root": {
       "inputs": {
-        "nixpkgs": "nixpkgs"
+        "git-hooks": "git-hooks",
+        "nixpkgs": "nixpkgs_2",
+        "systems": "systems"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
       }
     }
   },

flake.nix

@@ -1,12 +1,54 @@
 {
   inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-25.11";
+    systems.url = "github:nix-systems/default";
+    git-hooks.url = "github:cachix/git-hooks.nix";
   };
 
   outputs =
-    { self, nixpkgs }:
     {
-      # hydraJobs = nixpkgs.lib.mapAttrs (_: value: value.config.system.build.toplevel) self.nixosConfigurations;
+      self,
+      systems,
+      nixpkgs,
+      ...
+    }@inputs:
+    let
+      forEachSystem = inputs.nixpkgs.lib.genAttrs (import systems);
+    in
+    {
+      formatter = forEachSystem (
+        system:
+        let
+          pkgs = inputs.nixpkgs.legacyPackages.${system};
+        in
+        pkgs.treefmt
+      );
+
+      checks = forEachSystem (system: {
+        pre-commit-check = inputs.git-hooks.lib.${system}.run {
+          src = ./.;
+          hooks = {
+            treefmt.enable = true;
+            treefmt.settings.formatters = [ inputs.nixpkgs.legacyPackages.${system}.nixfmt ];
+            statix.enable = true;
+            deadnix.enable = true;
+            nil.enable = true;
+          };
+        };
+      });
+
+      devShells = forEachSystem (system: {
+        default =
+          let
+            pkgs = nixpkgs.legacyPackages.${system};
+            inherit (self.checks.${system}.pre-commit-check) shellHook enabledPackages;
+          in
+          pkgs.mkShell {
+            inherit shellHook;
+            buildInputs = enabledPackages;
+          };
+      });
+
       nixosConfigurations = {
         vm = nixpkgs.lib.nixosSystem { modules = [ ./systems/vm/configuration.nix ]; };
       };

modules/boot.nix

@@ -1,7 +1,9 @@
-{ config, pkgs, ... }:
+_:
 
 {
-  boot.loader.grub.enable = true;
+  boot.loader.grub = {
-  boot.loader.grub.device = "/dev/vda";
+    enable = true;
-  boot.loader.grub.useOSProber = true;
+    device = "/dev/vda";
+    useOSProber = true;
+  };
 }

modules/default-packages.nix

@@ -1,4 +1,4 @@
-{ config, pkgs, ... }:
+{ pkgs, ... }:
 
 {
   programs = {

modules/k3s.nix

@@ -1,9 +1,4 @@
-{
+{ config, lib, ... }:
-  config,
-  pkgs,
-  lib,
-  ...
-}:
 
 let
   cfg = config.modules.k3s;

modules/networkManager.nix

@@ -1,5 +1 @@
-{ config, pkgs, ... }:
+_: { networking.networkmanager.enable = true; }
-
-{
-  networking.networkmanager.enable = true;
-}

systems/vm/configuration.nix

@@ -1,4 +1,4 @@
-{ config, pkgs, ... }:
+_:
 
 {
   imports = [

systems/vm/hardware-configuration.nix

@@ -1,22 +1,20 @@
-{
+{ lib, modulesPath, ... }:
-  config,
-  lib,
-  pkgs,
-  modulesPath,
-  ...
-}:
 {
   imports = [ (modulesPath + "/profiles/qemu-guest.nix") ];
 
-  boot.initrd.availableKernelModules = [
+  boot = {
+    initrd = {
+      availableKernelModules = [
         "ahci"
         "xhci_pci"
         "virtio_pci"
         "sr_mod"
         "virtio_blk"
       ];
-  boot.initrd.kernelModules = [ ];
+      kernelModules = [ ];
-  boot.extraModulePackages = [ ];
+    };
+    extraModulePackages = [ ];
+  };
 
   fileSystems."/" = {
     device = "/dev/disk/by-uuid/ed56e12e-55cc-42e0-b94f-9a6d6bb2bdad";

treefmt.toml

@@ -46,7 +46,7 @@
 # Env $TREEFMT_WALK
 # walk = "filesystem"
 
-[formatter.mylanguage]
+[formatter.nixfmt]
 # Command to execute
 command = "nixfmt"
 # Command-line arguments for the command