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mirror of https://github.com/NixOS/mobile-nixos.git synced 2024-12-17 21:11:34 +03:00
mobile-nixos/modules/system-target.nix
Andy Chun 692544a5ef Fix attribute 'selectBySystem' missing with lib.systems.elaborate
Closes #252.

This uses the `lib.systems.elaborate` function which builds the
complete attrset as preferred by Nixpkgs by using
`lib.systems.elaborate`, rather than building a partial equivalent.

@noneucat originally implemented it the simplest way possible, re-using
parts of the now unneeded custom functions. We can, instead, simply
pass a system name to `elaborate`, which ends up doing the right thing.

Co-authored-by: Andy Chun <andy@lolc.at>
Co-authored-by: Samuel Dionne-Riel <samuel@dionne-riel.com>
2020-12-24 18:25:13 -05:00

53 lines
1.3 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.mobile.system;
inherit (config.nixpkgs) localSystem;
# The platform selected by the configuration
selectedPlatform = lib.systems.elaborate cfg.system;
in
{
options.mobile = {
system.system = mkOption {
# Known supported target types for Mobile NixOS
type = types.enum [
"aarch64-linux"
"armv7l-linux"
"x86_64-linux"
];
description = ''
Defines the kind of target architecture system the device is.
This will automagically setup cross-compilation where possible.
'';
};
};
config = {
assertions = [
{
assertion = pkgs.targetPlatform.system == cfg.system;
message = "pkgs.targetPlatform.system expected to be `${cfg.system}`, is `${pkgs.targetPlatform.system}`";
}
];
nixpkgs.crossSystem = lib.mkIf
(
let
result = selectedPlatform.system != localSystem.system;
in
builtins.trace
"Building with crossSystem?: ${selectedPlatform.system} != ${localSystem.system} ${if result then "we are" else "we're not"}."
result
)
(
builtins.trace
" crossSystem: config: ${selectedPlatform.config}"
selectedPlatform
)
;
};
}