Added git hooks

flake.nix

@@ -5,6 +5,7 @@
     inputs.flake-parts.lib.mkFlake {inherit inputs;} {
       systems = ["x86_64-linux"];
       imports = [
+        inputs.git-hooks-nix.flakeModule
         ./hosts
       ];
 
@@ -13,6 +14,13 @@
         pkgs,
         ...
       }: {
+        pre-commit.settings.hooks = {
+          alejandra.enable = true;
+          flake-checker.enable = true;
+          nil.enable = true;
+        };
+
+        formatter = pkgs.alejandra;
         devShells.default = pkgs.mkShell {
           packages = [
             pkgs.alejandra
@@ -20,9 +28,11 @@
           ];
           name = "dots";
           DIRENV_LOG_FORMAT = "";
-        };
 
-        formatter = pkgs.alejandra;
+          shellHook = ''
+            ${config.pre-commit.installationScript}
+          '';
+        };
       };
     };
 
@@ -31,6 +41,10 @@
     nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable"; # build error unrelated to config.
     nixpkgs-stable.url = "github:nixos/nixpkgs/nixos-24.11-small"; # build error unrelated to config.
     flake-parts.url = "github:hercules-ci/flake-parts";
+    git-hooks-nix = {
+      url = "github:cachix/git-hooks.nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
 
     hm = {
       url = "github:nix-community/home-manager/master";