mirror of
https://github.com/SebastianWendel/nixpkgs.git
synced 2024-11-06 02:06:46 +01:00
100 lines
3.3 KiB
Nix
100 lines
3.3 KiB
Nix
# From an end-user configuration file (`configuration.nix'), 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
|
|
evalConfigArgs@
|
|
{ # !!! 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 ? {}
|
|
, # !!! See comment about args in lib/modules.nix
|
|
specialArgs ? {}
|
|
, modules
|
|
, # !!! See comment about check in lib/modules.nix
|
|
check ? true
|
|
, prefix ? []
|
|
, lib ? import ../../lib
|
|
, extraModules ? let e = builtins.getEnv "NIXOS_EXTRA_MODULE_PATH";
|
|
in if e == "" then [] else [(import e)]
|
|
}:
|
|
|
|
let pkgs_ = pkgs;
|
|
in
|
|
|
|
let
|
|
evalModulesMinimal = (import ./default.nix {
|
|
inherit lib;
|
|
# Implicit use of feature is noted in implementation.
|
|
featureFlags.minimalModules = { };
|
|
}).evalModules;
|
|
|
|
pkgsModule = rec {
|
|
_file = ./eval-config.nix;
|
|
key = _file;
|
|
config = {
|
|
# Explicit `nixpkgs.system` or `nixpkgs.localSystem` should override
|
|
# this. Since the latter defaults to the former, the former should
|
|
# default to the argument. That way this new default could propagate all
|
|
# they way through, but has the last priority behind everything else.
|
|
nixpkgs.system = lib.mkDefault system;
|
|
|
|
# Stash the value of the `system` argument. When using `nesting.children`
|
|
# we want to have the same default value behavior (immediately above)
|
|
# without any interference from the user's configuration.
|
|
nixpkgs.initialSystem = system;
|
|
|
|
_module.args.pkgs = lib.mkIf (pkgs_ != null) (lib.mkForce pkgs_);
|
|
};
|
|
};
|
|
|
|
withWarnings = x:
|
|
lib.warnIf (evalConfigArgs?extraArgs) "The extraArgs argument to eval-config.nix is deprecated. Please set config._module.args instead."
|
|
lib.warnIf (evalConfigArgs?check) "The check argument to eval-config.nix is deprecated. Please set config._module.check instead."
|
|
x;
|
|
|
|
legacyModules =
|
|
lib.optional (evalConfigArgs?extraArgs) {
|
|
config = {
|
|
_module.args = extraArgs;
|
|
};
|
|
}
|
|
++ lib.optional (evalConfigArgs?check) {
|
|
config = {
|
|
_module.check = lib.mkDefault check;
|
|
};
|
|
};
|
|
allUserModules = modules ++ legacyModules;
|
|
|
|
noUserModules = evalModulesMinimal ({
|
|
inherit prefix specialArgs;
|
|
modules = baseModules ++ extraModules ++ [ pkgsModule modulesModule ];
|
|
});
|
|
|
|
# Extra arguments that are useful for constructing a similar configuration.
|
|
modulesModule = {
|
|
config = {
|
|
_module.args = {
|
|
inherit noUserModules baseModules extraModules modules;
|
|
};
|
|
};
|
|
};
|
|
|
|
nixosWithUserModules = noUserModules.extendModules { modules = allUserModules; };
|
|
|
|
in
|
|
withWarnings nixosWithUserModules // {
|
|
inherit extraArgs;
|
|
inherit (nixosWithUserModules._module.args) pkgs;
|
|
}
|