2cd7c1f198
This is primarily to ensure that -I nixpkgs=https://nixos.org/channels/nixos-unstable/nixexprs.tar.xz and -I nixpkgs=https://github.com/NixOS/nixpkgs-channels/archive/nixos-unstable.tar.gz and -I nixpkgs=https://nixos.org/channels/nixpkgs-unstable/nixexprs.tar.xz behave consistently. It also allows installing packages via "nix-env -iA nixos.<pkg>" rather than "nixos.pkgs.<pkg>". It would be even better to allow "nixpkgs.<pkg>", but that requires a change to nix-channel. Fixes #7659.
82 lines
2.1 KiB
Nix
82 lines
2.1 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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isConfig = x:
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builtins.isAttrs x || builtins.isFunction x;
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optCall = f: x:
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if builtins.isFunction f
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then f x
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else f;
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mergeConfig = lhs_: rhs_:
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let
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lhs = optCall lhs_ { inherit pkgs; };
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rhs = optCall rhs_ { inherit pkgs; };
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in
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lhs // rhs //
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optionalAttrs (lhs ? packageOverrides) {
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packageOverrides = pkgs:
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optCall lhs.packageOverrides pkgs //
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optCall (attrByPath ["packageOverrides"] ({}) rhs) pkgs;
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};
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configType = mkOptionType {
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name = "nixpkgs config";
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check = traceValIfNot isConfig;
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merge = args: fold (def: mergeConfig def.value) {};
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};
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in
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{
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options = {
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nixpkgs.config = mkOption {
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default = {};
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example = literalExample
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''
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{ firefox.enableGeckoMediaPlayer = true;
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packageOverrides = pkgs: {
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firefox60Pkgs = pkgs.firefox60Pkgs.override {
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enableOfficialBranding = true;
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};
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};
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}
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'';
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type = configType;
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description = ''
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The configuration of the Nix Packages collection. (For
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details, see the Nixpkgs documentation.) It allows you to set
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package configuration options, and to override packages
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globally through the <varname>packageOverrides</varname>
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option. The latter is a function that takes as an argument
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the <emphasis>original</emphasis> Nixpkgs, and must evaluate
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to a set of new or overridden packages.
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'';
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};
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nixpkgs.system = mkOption {
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type = types.str;
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example = "i686-linux";
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description = ''
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Specifies the Nix platform type for which NixOS should be built.
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If unset, it defaults to the platform type of your host system.
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Specifying this option is useful when doing distributed
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multi-platform deployment, or when building virtual machines.
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'';
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};
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};
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config = {
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_module.args.pkgs = import ../../.. {
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system = config.nixpkgs.system;
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inherit (config.nixpkgs) config;
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};
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};
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}
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