94 lines
2.6 KiB
Nix
94 lines
2.6 KiB
Nix
# Copyright 2025-2026 _cry64 (Emile Clark-Boman)
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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{
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base,
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lib,
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system,
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config,
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contextName,
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...
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}: let
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inherit
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(builtins)
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mapAttrs
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;
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cfg = config.nixpkgs.channels;
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in {
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options.nixpkgs.channels = lib.mkOption {
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type = lib.types.attrs;
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default = {};
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description = "Declare package repositories";
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example = {
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"pkgs" = {
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source = "inputs.nixpkgs";
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system = "x86-64-linux";
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config = {
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allowUnfree = true;
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allowBroken = false;
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};
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};
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"upkgs" = {
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source = "inputs.nixpkgs-unstable";
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system = "x86-64-linux";
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config = {
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allowUnfree = false;
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allowBroken = true;
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};
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};
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};
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};
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config = let
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repos =
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cfg
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|> (xs: removeAttrs xs ["default"])
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|> mapAttrs (
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name: args:
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lib.mkForce (
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assert args ? source
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|| abort ''
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`nixpkgs.channels.${name}` missing required attribute "source"
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'';
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import args.source ({inherit system;} // (removeAttrs args ["source"]))
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)
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);
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# XXX: TODO: would it work to use `base` instead of having default?
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defaultPkgs =
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cfg.default or (throw ''
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Your `nixpkgs.nix` file does not declare a default package source.
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Ensure you set `nixpkgs.channels.*.default = ...;`
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'');
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in {
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# NOTE: _module.args is a special option that allows us to
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# NOTE: set extend specialArgs from inside the modules.
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# WARNING: pkgs is a reserved specialArg
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_module.args = removeAttrs repos ["pkgs" "default"];
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nixpkgs =
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if contextName == "hosts"
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then {
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flake.source = lib.mkForce base; # DEBUG: temp while getting base to work
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overlays = lib.mkForce (defaultPkgs.overlays or {});
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config = lib.mkForce (defaultPkgs.config or {});
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}
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else if contextName == "homes"
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then {
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config = lib.mkForce (defaultPkgs.config or {});
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overlays = lib.mkForce (defaultPkgs.overlays or []);
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}
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else {};
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};
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}
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