26e72d85e6
This enables a module system feature documented here: https://nixos.org/manual/nixpkgs/stable/index.html#module-system-lib-evalModules-param-class For example, it allows a mistake to be caught, which is loading a NixOS module into home-manager. This only works when the offending module declares what it's for with a `_class` attribute. It is not expected that users declare the `_type`, because the payoff is small. It is only expected to be set by generic code, such as functions or libraries that help with the "publishing" of modules (e.g. flake-parts, flake-utils). The class feature has been available in the module system since https://github.com/NixOS/nixpkgs/pull/197547, merged May 6, 2023. It has been part of all releases since 23.05-beta. The last NixOS release that did _not_ support it has been end-of-life for close to a year now. Example: (lib.homeManagerConfiguration { pkgs = nixpkgs.legacyPackages.x86_64-linux; modules = [{ _class = "nixos"; imports = [ ./foo.nix ]; }]; }).activation-script Corresponding error: error: The module <unknown-file> was imported into homeManager instead of nixos. (`<unknown-file>` can be improved by also setting `_file`, if known; a much older feature) PR #5339
63 lines
1.6 KiB
Nix
63 lines
1.6 KiB
Nix
{ configuration, pkgs, lib ? pkgs.lib
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# Whether to check that each option has a matching declaration.
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, check ? true
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# Extra arguments passed to specialArgs.
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, extraSpecialArgs ? { } }:
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with lib;
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let
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collectFailed = cfg:
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map (x: x.message) (filter (x: !x.assertion) cfg.assertions);
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showWarnings = res:
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let f = w: x: builtins.trace "[1;31mwarning: ${w}[0m" x;
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in fold f res res.config.warnings;
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extendedLib = import ./lib/stdlib-extended.nix lib;
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hmModules = import ./modules.nix {
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inherit check pkgs;
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lib = extendedLib;
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};
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rawModule = extendedLib.evalModules {
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modules = [ configuration ] ++ hmModules;
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class = "homeManager";
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specialArgs = { modulesPath = builtins.toString ./.; } // extraSpecialArgs;
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};
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moduleChecks = raw:
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showWarnings (let
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failed = collectFailed raw.config;
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failedStr = concatStringsSep "\n" (map (x: "- ${x}") failed);
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in if failed == [ ] then
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raw
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else
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throw ''
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Failed assertions:
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${failedStr}'');
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withExtraAttrs = rawModule:
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let module = moduleChecks rawModule;
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in {
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inherit (module) options config;
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activationPackage = module.config.home.activationPackage;
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# For backwards compatibility. Please use activationPackage instead.
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activation-script = module.config.home.activationPackage;
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newsDisplay = rawModule.config.news.display;
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newsEntries = sort (a: b: a.time > b.time)
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(filter (a: a.condition) rawModule.config.news.entries);
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inherit (module._module.args) pkgs;
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extendModules = args: withExtraAttrs (rawModule.extendModules args);
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};
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in withExtraAttrs rawModule
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