Fediversity/flake.nix

{
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.05";
    flake-parts.url = "github:hercules-ci/flake-parts";
    git-hooks.url = "github:cachix/git-hooks.nix";
  };

  outputs =
    inputs@{ flake-parts, ... }:
    flake-parts.lib.mkFlake { inherit inputs; } {
      systems = [
        "x86_64-linux"
        "aarch64-linux"
        "x86_64-darwin"
        "aarch64-darwin"
      ];

      imports = [ inputs.git-hooks.flakeModule ];

      perSystem =
        { config, pkgs, ... }:
        {
          formatter = pkgs.nixfmt-rfc-style;

          pre-commit.settings.hooks =
            ## Not everybody might want pre-commit hooks, so we make them
            ## opt-in. Maybe one day we will decide to have them everywhere.
            let
              inherit (builtins) concatStringsSep;
              optin = [ "deployment" ];
              files = "^((" + concatStringsSep "|" optin + ")/.*\\.nix|[^/]*\\.nix)$";
            in
            {
              nixfmt-rfc-style = {
                enable = true;
                inherit files;
              };
              deadnix = {
                enable = true;
                inherit files;
              };
            };

          devShells.default = pkgs.mkShell { shellHook = config.pre-commit.installationScript; };
        };
    };
}