flake.nix

{
  description = "A flake with pre-commit hooks";

  inputs = {
    flake-parts.url = "github:hercules-ci/flake-parts";
    git-hooks-nix.inputs.nixpkgs.follows = "nixpkgs";
    git-hooks-nix.url = "github:cachix/git-hooks.nix";
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
  };

  outputs = inputs@{ self, flake-parts, ... }:
    flake-parts.lib.mkFlake
      { inherit inputs; }
      {
        imports = [
          inputs.git-hooks-nix.flakeModule
        ];
        systems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
        perSystem = { config, self', inputs', pkgs, ... }: {
          # Per-system attributes can be defined here. The self' and inputs'
          # module parameters provide easy access to attributes of the same
          # system.

          # Equivalent to  inputs'.nixpkgs.legacyPackages.hello;
          packages.hello = pkgs.hello;
          pre-commit.settings.hooks.nixpkgs-fmt.enable = true;
          # NOTE: You can also use `config.pre-commit.devShell`
          devShells.default = pkgs.mkShell {
            shellHook = ''
              ${config.pre-commit.installationScript}
              echo 1>&2 "Welcome to the development shell!"
            '';
          };
        };
        flake = {
          # The usual flake attributes can be defined here, including system-
          # agnostic ones like nixosModule and system-enumerating ones, although
          # those are more easily expressed in perSystem.

        };
      };
}