flake.nix

{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.05";

    naersk = {
      url = "github:nix-community/naersk";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    fenix = {
      url = "github:nix-community/fenix";
    };

    utils = {
      url = "github:numtide/flake-utils";
    };
  };

  outputs = { self, nixpkgs, naersk, fenix, utils, ... }:
    utils.lib.eachDefaultSystem
      (system:
        let
          pkgs = nixpkgs.legacyPackages.${system};
          toolchain = with fenix.packages.${system}; combine [
            latest.cargo
            latest.rustc
          ];

          package = pkgs.callPackage ./derivation.nix {
            buildPackage = (naersk.lib.${system}.override {
              cargo = toolchain;
              rustc = toolchain;
            }).buildPackage;
          };

        in
        rec {
          checks = packages;
          packages = {
            data-accumulator = package;
            default = package;
            docs = (pkgs.nixosOptionsDoc {
              options = (nixpkgs.lib.nixosSystem {
                inherit system;
                modules = [ self.nixosModules.default ];
              }).options.TLMS;
            }).optionsCommonMark;
          };
          devShells.default = pkgs.mkShell {
            nativeBuildInputs = (with packages.data-accumulator; buildInputs ++ nativeBuildInputs);
          };
        }
      ) // {
      overlays.default = final: prev: {
        inherit (self.packages.${prev.system})
          data-accumulator;
      };

      nixosModules = rec {
        default = data-accumulator;
        data-accumulator = import ./nixos-module;
      };

      hydraJobs =
        let
          hydraSystems = [
            "x86_64-linux"
            "aarch64-linux"
          ];
        in
        builtins.foldl'
          (hydraJobs: system:
            builtins.foldl'
              (hydraJobs: pkgName:
                nixpkgs.lib.recursiveUpdate hydraJobs {
                  ${pkgName}.${system} = self.packages.${system}.${pkgName};
                }
              )
              hydraJobs
              (builtins.attrNames self.packages.${system})
          )
          { }
          hydraSystems;
    };
}