mirror of
https://github.com/NixOS/mobile-nixos.git
synced 2024-12-15 11:03:37 +03:00
67 lines
1.7 KiB
Nix
67 lines
1.7 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.mobile.system;
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inherit (config.nixpkgs) localSystem;
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# Mapping from system types to config types
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# A simplified view of <nixpkgs/lib/systems/examples.nix>
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config_types = {
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aarch64-linux = "aarch64-unknown-linux-gnu";
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armv7l-linux = "armv7l-unknown-linux-gnueabihf";
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x86_64-linux = "x86_64-unknown-linux-gnu";
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};
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# Derived from config_types
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target_types = lib.attrNames config_types;
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# Builds the expected "platform" set for cross-compilation from the given
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# system name.
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selectPlatform = system: {
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inherit system;
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platform = lib.systems.platforms.selectBySystem system;
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config = config_types.${system};
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};
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# The platform selected by the configuration
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selectedPlatform = selectPlatform cfg.system;
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in
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{
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options.mobile = {
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system.system = mkOption {
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type = types.enum target_types;
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description = ''
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Defines the kind of target architecture system the device is.
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This will automagically setup cross-compilation where possible.
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'';
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};
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};
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config = {
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assertions = [
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{
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assertion = pkgs.targetPlatform.system == cfg.system;
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message = "pkgs.targetPlatform.system expected to be `${cfg.system}`, is `${pkgs.targetPlatform.system}`";
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}
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];
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nixpkgs.crossSystem = lib.mkIf
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(
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let
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result = selectedPlatform.system != localSystem.system;
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in
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builtins.trace
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"Building with crossSystem?: ${selectedPlatform.system} != ${localSystem.system} → ${if result then "we are" else "we're not"}."
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result
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)
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(
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builtins.trace
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" crossSystem: config: ${selectedPlatform.config}"
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selectedPlatform
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)
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;
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};
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}
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