mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-11-18 11:40:45 +00:00
0a0a29fd0b
Ideally the module system could be configured pretty much completely by the contents of the modules themselves, so add comments about avoiding complicating it further and possibly removing now-redundant configurability from the existing interface.
79 lines
2.6 KiB
Nix
79 lines
2.6 KiB
Nix
# From an end-user configuration file (`configuration'), build a NixOS
|
||
# configuration object (`config') from which we can retrieve option
|
||
# values.
|
||
|
||
# !!! Please think twice before adding to this argument list!
|
||
# Ideally eval-config.nix would be an extremely thin wrapper
|
||
# around lib.evalModules, so that modular systems that have nixos configs
|
||
# as subcomponents (e.g. the container feature, or nixops if network
|
||
# expressions are ever made modular at the top level) can just use
|
||
# types.submodule instead of using eval-config.nix
|
||
{ # !!! system can be set modularly, would be nice to remove
|
||
system ? builtins.currentSystem
|
||
, # !!! is this argument needed any more? The pkgs argument can
|
||
# be set modularly anyway.
|
||
pkgs ? null
|
||
, # !!! what do we gain by making this configurable?
|
||
baseModules ? import ../modules/module-list.nix
|
||
, # !!! See comment about args in lib/modules.nix
|
||
extraArgs ? {}
|
||
, modules
|
||
, # !!! See comment about check in lib/modules.nix
|
||
check ? true
|
||
, prefix ? []
|
||
, lib ? import ../../lib
|
||
}:
|
||
|
||
let extraArgs_ = extraArgs; pkgs_ = pkgs; system_ = system;
|
||
extraModules = let e = builtins.getEnv "NIXOS_EXTRA_MODULE_PATH";
|
||
in if e == "" then [] else [(import (builtins.toPath e))];
|
||
in
|
||
|
||
let
|
||
pkgsModule = rec {
|
||
_file = ./eval-config.nix;
|
||
key = _file;
|
||
config = {
|
||
nixpkgs.system = lib.mkDefault system_;
|
||
};
|
||
};
|
||
|
||
in rec {
|
||
|
||
# Merge the option definitions in all modules, forming the full
|
||
# system configuration.
|
||
inherit (lib.evalModules {
|
||
inherit prefix check;
|
||
modules = modules ++ extraModules ++ baseModules ++ [ pkgsModule ];
|
||
args = extraArgs;
|
||
}) config options;
|
||
|
||
# These are the extra arguments passed to every module. In
|
||
# particular, Nixpkgs is passed through the "pkgs" argument.
|
||
# FIXME: we enable config.allowUnfree to make packages like
|
||
# nvidia-x11 available. This isn't a problem because if the user has
|
||
# ‘nixpkgs.config.allowUnfree = false’, then evaluation will fail on
|
||
# the 64-bit package anyway. However, it would be cleaner to respect
|
||
# nixpkgs.config here.
|
||
extraArgs = extraArgs_ // {
|
||
inherit pkgs modules baseModules;
|
||
modulesPath = ../modules;
|
||
pkgs_i686 = import ./nixpkgs.nix { system = "i686-linux"; config.allowUnfree = true; };
|
||
utils = import ./utils.nix pkgs;
|
||
};
|
||
|
||
pkgs =
|
||
if pkgs_ != null
|
||
then pkgs_
|
||
else import ./nixpkgs.nix (
|
||
let
|
||
system = if nixpkgsOptions.system != "" then nixpkgsOptions.system else system_;
|
||
nixpkgsOptions = config.nixpkgs;
|
||
in
|
||
{
|
||
inherit system;
|
||
inherit (nixpkgsOptions) config;
|
||
});
|
||
|
||
}
|