lib/modules: Check against importing things with a _type

      # Like unifyModuleSyntax, but also imports paths and calls functions if necessary

      loadModule = args: fallbackFile: fallbackKey: m:

        if isFunction m || isAttrs m then

        if isFunction m then

          unifyModuleSyntax fallbackFile fallbackKey (applyModuleArgsIfFunction fallbackKey m args)

        else if isAttrs m then

          if m._type or "module" == "module" then

            unifyModuleSyntax fallbackFile fallbackKey (applyModuleArgsIfFunction fallbackKey m args)

          else if m._type == "if" || m._type == "override" then

            loadModule args fallbackFile fallbackKey { config = m; }

          else

            throw "Could not load a value as a module, because it is of type ${lib.strings.escapeNixString m._type}${lib.optionalString (fallbackFile != null) ", in file ${toString fallbackFile}."}"

        else if isList m then

          let defs = [{ file = fallbackFile; value = m; }]; in

          throw "Module imports can't be nested lists. Perhaps you meant to remove one level of lists? Definitions: ${showDefs defs}"

checkConfigError 'The module .*/module-class-is-darwin.nix was imported into nixos instead of darwin.' config.fail.config ./class-check.nix

checkConfigError 'The module foo.nix#darwinModules.default was imported into nixos instead of darwin.' config.fail-anon.config ./class-check.nix

# _type check

checkConfigError 'Could not load a value as a module, because it is of type "flake", in file .*/module-imports-_type-check.nix' config.ok.config ./module-imports-_type-check.nix

checkConfigOutput '^true$' "$@" config.enable ./declare-enable.nix ./define-enable-with-top-level-mkIf.nix

# doRename works when `warnings` does not exist.

checkConfigOutput '^1234$' config.c.d.e ./doRename-basic.nix

# doRename adds a warning.

{ lib, ... }:

# I think this might occur more realistically in a submodule

{

  imports = [ (lib.mkIf true { enable = true; }) ];

}

{

  imports = [ { _type = "flake"; } ];

}