feat: add devshell and pre-commit

.envrc

@@ -0,0 +1 @@
+use flake;

.gitignore

@@ -1,3 +1,2 @@
 result
-
+.direnv
-

.pre-commit-config.yaml

@@ -0,0 +1,20 @@
+default_install_hook_types:
+  - pre-commit
+  - commit-msg
+
+repos:
+  - repo: https://github.com/gitleaks/gitleaks
+    rev: v8.18.2
+    hooks:
+      - id: gitleaks
+        stages: [commit]
+
+  - repo: local
+    hooks:
+      - id: nixpkgs-fmt
+        name: Check formatting
+        entry: nixfmt
+        language: system
+        files: .*\.nix$
+        args: [-c]
+        stages: [commit]

flake.nix

@@ -40,6 +40,15 @@
         };
       };
 
+      devShell."${system}" = pkgs.mkShell {
+        buildInputs = with pkgs; [
+          pre-commit
+          nixfmt-rfc-style
+        ];
+        shellHook = ''
+          ${pkgs.pre-commit}/bin/pre-commit install -f
+        '';
+      };
       templates = import ./templates;
     };
 }

modules/system/mime.nix

@@ -0,0 +1 @@
+{ }