diff options
Diffstat (limited to 'nixos/lib/eval-config-minimal.nix')
-rw-r--r-- | nixos/lib/eval-config-minimal.nix | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/nixos/lib/eval-config-minimal.nix b/nixos/lib/eval-config-minimal.nix new file mode 100644 index 0000000000000..d45b9ffd42618 --- /dev/null +++ b/nixos/lib/eval-config-minimal.nix @@ -0,0 +1,49 @@ + +# DO NOT IMPORT. Use nixpkgsFlake.lib.nixos, or import (nixpkgs + "/nixos/lib") +{ lib }: # read -^ + +let + + /* + Invoke NixOS. Unlike traditional NixOS, this does not include all modules. + Any such modules have to be explicitly added via the `modules` parameter, + or imported using `imports` in a module. + + A minimal module list improves NixOS evaluation performance and allows + modules to be independently usable, supporting new use cases. + + Parameters: + + modules: A list of modules that constitute the configuration. + + specialArgs: An attribute set of module arguments. Unlike + `config._module.args`, these are available for use in + `imports`. + `config._module.args` should be preferred when possible. + + Return: + + An attribute set containing `config.system.build.toplevel` among other + attributes. See `lib.evalModules` in the Nixpkgs library. + + */ + evalModules = { + prefix ? [], + modules ? [], + specialArgs ? {}, + }: + # NOTE: Regular NixOS currently does use this function! Don't break it! + # Ideally we don't diverge, unless we learn that we should. + # In other words, only the public interface of nixos.evalModules + # is experimental. + lib.evalModules { + inherit prefix modules; + specialArgs = { + modulesPath = builtins.toString ../modules; + } // specialArgs; + }; + +in +{ + inherit evalModules; +} |