Add shell.nix

.gitignore

@@ -1 +1,3 @@
 .hugo_build.lock
+.direnv
+.pre-commit-config.yaml

flake.nix

@@ -0,0 +1,17 @@
+{
+  description = "cronyakatsuki.xyz";
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+    pre-commit-hooks.url = "github:cachix/pre-commit-hooks.nix";
+  };
+
+  outputs = { self, nixpkgs, flake-utils, pre-commit-hooks, ... }:
+    let
+      system = "x86_64-linux";
+      pkgs = nixpkgs.legacyPackages.${system};
+    in {
+      devShells.x86_64-linux.default =
+        (import ./shell.nix { inherit pkgs pre-commit-hooks; });
+    };
+}

shell.nix

@@ -0,0 +1,15 @@
+{ pkgs ? import <nixpkgs> { }, pre-commit-hooks }:
+let
+  pre-commit-check = pre-commit-hooks.lib.${pkgs.system}.run {
+    src = ./.;
+    hooks = {
+        shfmt.enable = true;
+        html-tidy.enable = true;
+        taplo.enable = true;
+    };
+  };
+in pkgs.mkShell {
+  inherit (pre-commit-check) shellHook;
+  name = "cronyakatsuki.xyz";
+  nativeBuildInputs = [ pkgs.hugo ];
+}