home-manager/modules/default.nix

{ configuration, pkgs, lib ? pkgs.lib

  # Whether to check that each option has a matching declaration.
, check ? true
  # Extra arguments passed to specialArgs.
, extraSpecialArgs ? { } }:

with lib;

let

  collectFailed = cfg:
    map (x: x.message) (filter (x: !x.assertion) cfg.assertions);

  showWarnings = res:
    let f = w: x: builtins.trace "warning: ${w}" x;
    in fold f res res.config.warnings;

  extendedLib = import ./lib/stdlib-extended.nix lib;

  hmModules = import ./modules.nix {
    inherit check pkgs;
    lib = extendedLib;
  };

  rawModule = extendedLib.evalModules {
    modules = [ configuration ] ++ hmModules;
    specialArgs = { modulesPath = builtins.toString ./.; } // extraSpecialArgs;
  };

  module = showWarnings (let
    failed = collectFailed rawModule.config;
    failedStr = concatStringsSep "\n" (map (x: "- ${x}") failed);
  in if failed == [ ] then
    rawModule
  else
    throw ''

      Failed assertions:
      ${failedStr}'');

in {
  inherit (module) options config;

  activationPackage = module.config.home.activationPackage;

  # For backwards compatibility. Please use activationPackage instead.
  activation-script = module.config.home.activationPackage;

  newsDisplay = rawModule.config.news.display;
  newsEntries = sort (a: b: a.time > b.time)
    (filter (a: a.condition) rawModule.config.news.entries);

  inherit (module._module.args) pkgs;
}