feat: enable pre-commit checks

.nix/flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "A flake editing flake";
+
+  inputs.nixpkgs.url = "https://flakehub.com/f/NixOS/nixpkgs/0.1.*.tar.gz";
+
+  outputs = { nixpkgs, ... }:
+    let
+      supportedSystems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
+      forEachSupportedSystem = f: nixpkgs.lib.genAttrs supportedSystems (system: f {
+        pkgs = import nixpkgs { inherit system; };
+      });
+    in
+    {
+      devShells = forEachSupportedSystem ({ pkgs }: {
+        default = pkgs.mkShell.override
+          {
+            # Override stdenv in order to change compiler:
+            # stdenv = pkgs.clangStdenv;
+          }
+          {
+            packages = with pkgs; [
+              pre-commit
+              commitizen
+            ];
+
+            shellHook = ''
+              pre-commit install --allow-missing-config --hook-type pre-commit --hook-type commit-msg
+            '';
+          };
+      });
+    };
+}