added checks and formatting pre-commit hooks

.gitignore

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

all-modules.nix

@@ -1,5 +1,5 @@
-{lib, ...}:
+{ lib, ... }:
 
 {
-	imports = lib.fileset.toList (lib.fileset.fileFilter (f: f.hasExt "nix") ./modules);
+  imports = lib.fileset.toList (lib.fileset.fileFilter (f: f.hasExt "nix") ./modules);
 }

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,
-        "narHash": "sha256-0MAd+0mun3K/Ns8JATeHT1sX28faLII5hVLq0L3BdZU=",
+        "lastModified": 1770073757,
+        "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

@@ -1,16 +1,56 @@
 {
   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;
-    nixosConfigurations = {
-      vm = nixpkgs.lib.nixosSystem {
-        modules = [
-          ./systems/vm/configuration.nix
-        ];
+  outputs =
+    {
+      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.device = "/dev/vda";
-  boot.loader.grub.useOSProber = true;
+  boot.loader.grub = {
+    enable = true;
+    device = "/dev/vda";
+    useOSProber = true;
+  };
 }

modules/default-packages.nix

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

modules/graphical.nix

@@ -1,32 +1,35 @@
-{config, pkgs, lib, ...}:
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
 
 let
-	cfg = config.modules.graphical;
-  quickshell-packages = lib.mkIf cfg.quickshell (with pkgs; [quickshell]);
+  cfg = config.modules.graphical;
 in
 
 {
-	options = {
-		modules.graphical = {
+  options = {
+    modules.graphical = {
       enable = lib.mkEnableOption "Enable the GUI";
-
       waybar = lib.mkEnableOption "Enable waybar";
-
       quickshell = lib.mkEnableOption "Enable quickshell";
     };
-	};
+  };
 
-	config = lib.mkIf cfg.enable {
-		programs.niri.enable = true;
-		services.displayManager.ly.enable = true;
+  config = lib.mkIf cfg.enable {
+    programs.niri.enable = true;
+    services.displayManager.ly.enable = true;
 
-    environment.systemPackages = with pkgs; [
-      alacritty
-      wl-clipboard
-      
-    ]
-    ++ quickshell-packages;
+    environment.systemPackages =
+      with pkgs;
+      [
+        alacritty
+        wl-clipboard
+      ]
+      ++ lib.optional cfg.quickshell quickshell;
 
     programs.waybar.enable = lib.mkIf cfg.waybar true;
-	};
+  };
 }

modules/k3s.nix

@@ -1,4 +1,4 @@
-{config, pkgs, lib, ...}:
+{ config, lib, ... }:
 
 let
   cfg = config.modules.k3s;
@@ -7,7 +7,5 @@ in
 {
   options.modules.k3s.enable = lib.mkEnableOption "Enable the k3s service";
 
-  config = lib.mkIf cfg.enable {
-    services.k3s.enable = true;
-  };
+  config = lib.mkIf cfg.enable { services.k3s.enable = true; };
 }

modules/kubernetes.nix

@@ -1,11 +1,16 @@
-{config, pkgs, lib, ...}:
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
 
 let
   cfg = config.modules.kubernetes;
 in
 
 {
-  options.modules.kubernetes.enable =  lib.mkEnableOption "Enable MiniKube and Kubectl";
+  options.modules.kubernetes.enable = lib.mkEnableOption "Enable MiniKube and Kubectl";
 
   config = lib.mkIf cfg.enable {
     environment.systemPackages = with pkgs; [

modules/locale.nix

@@ -1,5 +1,4 @@
-_:
-{
+_: {
   services.automatic-timezoned.enable = true;
   i18n.defaultLocale = "en_GB.UTF-8";
   i18n.extraLocaleSettings = {
@@ -13,5 +12,5 @@ _:
     LC_TELEPHONE = "en_GB.UTF-8";
     LC_TIME = "en_GB.UTF-8";
   };
-	console.keyMap = "uk";
+  console.keyMap = "uk";
 }

modules/networkManager.nix

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

modules/prismLauncher.nix

@@ -1,4 +1,9 @@
-{config, pkgs, lib, ...}:
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
 
 let
   cfg = config.modules.prismLauncher;
@@ -6,9 +11,5 @@ in
 {
   options.modules.prismLauncher.enable = lib.mkEnableOption "Enables the prism minecraft launcher";
 
-  config = lib.mkIf cfg.enable {
-    environment.systemPackages = with pkgs; [
-      prismlauncher
-    ];
-  };
+  config = lib.mkIf cfg.enable { environment.systemPackages = with pkgs; [ prismlauncher ]; };
 }

modules/yazi.nix

@@ -1,8 +1,26 @@
-{config, pkgs, lib, ...}:
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
 
 let
   cfg = config.modules.yazi;
-  optional-packages = lib.mkIf cfg.optional-programs (with pkgs; [
+in
+{
+  options.modules.yazi = {
+    enable = lib.mkEnableOption "Enable Yazi file manager";
+  };
+
+  config = lib.mkIf cfg.enable {
+    programs = {
+      yazi.enable = true;
+    };
+
+    fonts.packages = builtins.filter lib.attrsets.isDerivation (builtins.attrValues pkgs.nerd-fonts);
+
+    environment.systemPackages = with pkgs; [
       ffmpeg_7
       p7zip
       jq
@@ -13,22 +31,6 @@ let
       zoxide
       resvg
       imagemagick
-    ]);
-in
-{
-  options.modules.yazi = {
-    enable = lib.mkEnableOption "Enable Yazi file manager";
-    optional-programs = lib.mkEnableOption "Enable optional extra packages";
-  };
-
-  config = lib.mkIf cfg.enable {
-    programs = {
-      yazi.enable = true;
-    };
-
-    environment.systemPackages = with pkgs; [
-      nerd-fonts.ubuntu
-      nerd-fonts.ubuntu-mono
-    ] ++ optional-packages;
+    ];
   };
 }

shell.nix

@@ -0,0 +1,11 @@
+{
+  pkgs ? import <nixpkgs> { },
+}:
+pkgs.mkShell {
+  nativeBuildInputs = with pkgs.buildPackages; [
+    deadnix
+    statix
+    treefmt
+    nixfmt-rfc-style
+  ];
+}

systems/vm/configuration.nix

@@ -1,27 +1,25 @@
-{ config, pkgs, ...}:
+_:
 
 {
-	imports = [
-		../../all-modules.nix
-		./hardware-configuration.nix
-	];
+  imports = [
+    ../../all-modules.nix
+    ./hardware-configuration.nix
+  ];
 
-	users.users.riley = {
-		isNormalUser = true;
-		extraGroups = ["wheel"];
-	};
+  users.users.riley = {
+    isNormalUser = true;
+    extraGroups = [ "wheel" ];
+  };
 
   networking.hostName = "vm";
 
-	modules.graphical = {
+  modules.graphical = {
     enable = true;
     waybar = true;
+    quickshell = true;
   };
 
-  modules.yazi = {
-    enable = true;
-    optional-programs = true;
-  };
+  modules.yazi.enable = true;
 
-	system.stateVersion = "25.11";
+  system.stateVersion = "25.11";
 }

systems/vm/hardware-configuration.nix

@@ -1,19 +1,27 @@
-{ config, lib, pkgs, modulesPath, ...}:
+{ lib, modulesPath, ... }:
 {
-  imports = [
-    (modulesPath + "/profiles/qemu-guest.nix")
-  ];
+  imports = [ (modulesPath + "/profiles/qemu-guest.nix") ];
 
-  boot.initrd.availableKernelModules = ["ahci" "xhci_pci" "virtio_pci" "sr_mod" "virtio_blk" ];
-  boot.initrd.kernelModules = [];
-  boot.extraModulePackages = [];
+  boot = {
+    initrd = {
+      availableKernelModules = [
+        "ahci"
+        "xhci_pci"
+        "virtio_pci"
+        "sr_mod"
+        "virtio_blk"
+      ];
+      kernelModules = [ ];
+    };
+    extraModulePackages = [ ];
+  };
 
   fileSystems."/" = {
     device = "/dev/disk/by-uuid/ed56e12e-55cc-42e0-b94f-9a6d6bb2bdad";
     fsType = "ext4";
   };
 
-  swapDevices = [];
+  swapDevices = [ ];
 
   nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
 }

treefmt.toml

@@ -0,0 +1,61 @@
+# One CLI to format the code tree - https://github.com/numtide/treefmt
+
+# Do not exit with error if a configured formatter is missing
+# Env $TREEFMT_ALLOW_MISSING_FORMATTER
+# allow-missing-formatter = true
+
+# The file into which a cpu profile will be written
+# Env $TREEFMT_CPU_PROFILE
+# cpu-profile = ./cpu.pprof
+
+# Exclude files or directories matching the specified globs
+# Env $TREEFMT_EXCLUDES
+# excludes = ["*.md", "*.gif"]
+
+# Exit with error if any changes were made during execution
+# Useful for CI
+# Env $TREEFMT_FAIL_ON_CHANGE
+# fail-on-change = true
+
+# A list of formatters to apply
+# Defaults to all configured formatters
+# Env $TREEFMT_FORMATTERS
+# formatters = ["gofmt", "prettier"]
+
+# Log paths that did not match any formatters at the specified log level
+# Possible values are <debug|info|warn|error|fatal>
+# Env $TREEFMT_ON_UNMATCHED
+# on-unmatched = "info"
+
+# The root directory from which treefmt will start walking the filesystem
+# Defaults to the directory containing the config file
+# Env $TREEFMT_TREE_ROOT
+# tree-root = "/tmp/foo"
+
+# File to search for to find the tree root (if tree-root is not set)
+# Env $TREEFMT_TREE_ROOT_FILE
+# tree-root-file = ".git/config"
+
+# Set the verbosity of logs
+# 0 = warn, 1 = info, 2 = debug
+# Env $TREEFMT_VERBOSE
+# verbose = 2
+
+# The method used to traverse the files within the tree root
+# Currently, we support 'auto', 'git' or 'filesystem'
+# Env $TREEFMT_WALK
+# walk = "filesystem"
+
+[formatter.nixfmt]
+# Command to execute
+command = "nixfmt"
+# Command-line arguments for the command
+options = ["-s", "-v", "-w150"]
+# Glob pattern of files to include
+includes = ["*.nix"]
+# Glob patterns of files to exclude
+excludes = []
+# Controls the order of application when multiple formatters match the same file
+# Lower the number, the higher the precedence
+# Default is 0
+priority = 0