feat: add pre-commit-hooks devShell and checks

flake.nix

@@ -20,11 +20,16 @@
       url = "github:nlewo/comin";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+
+    pre-commit-hooks = {
+      url = "github:cachix/pre-commit-hooks.nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
   outputs = inputs@{
     self, nixpkgs,
-    flake-utils, sops-nix, utils, comin,
+    flake-utils, sops-nix, utils, comin, pre-commit-hooks,
     ...
   }:
   let
@@ -33,6 +38,27 @@
   utils.lib.mkFlake {
     inherit self inputs;
 
+    outputsBuilder = channels: let
+      pkgs = channels.nixpkgs;
+      system = pkgs.system;
+      pre-commit-check = pre-commit-hooks.lib.${system}.run {
+        src = ./.;
+        hooks = {
+          nixfmt-rfc-style.enable = true;
+          statix.enable = true;
+          terraform-format.enable = true;
+        };
+      };
+    in {
+      checks = {
+        inherit pre-commit-check;
+      };
+      devShells.default = pkgs.mkShell {
+        inherit (pre-commit-check) shellHook;
+        buildInputs = pre-commit-check.enabledPackages;
+      };
+    };
+
     hostDefaults = {
       inherit system;