114 lines
3.2 KiB
Nix
114 lines
3.2 KiB
Nix
# Copyright 2026 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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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.attrsOf (lib.types.attrs);
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default = {};
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description = "Declare package repositories per module context (nixos, home-manager, etc)";
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example = {
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"homes" = {
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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 = true;
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allowBroken = false;
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};
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};
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};
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};
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};
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# or abort ''
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# `nixpkgs.channels.${contextName}` does not exist, but neither does `nixpkgs.channels.default`!
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# A channel configuration must be declared for module context "${contextName}".
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# ''
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config = let
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# TODO: use lib.types.submodule to restrict what options
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# TODO: can be given to `nixpkgs.channels.${moduleName}.${name}`
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decl =
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cfg.${contextName} or cfg.default;
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repos =
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decl
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|> mapAttrs (
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name: args:
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lib.mkForce (
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# builtins.trace "SAVE ME GOT NAME: ${name}" (
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assert args ? source
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|| abort ''
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${toString ./.}
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`nixpkgs.channels.${contextName}.${name}` missing required attribute "source"
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'';
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((removeAttrs args ["source"])
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// {inherit system;})
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|> import args.source
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# DEBUG: |> lib.mkOverride 200
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)
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# )
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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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# "pkgs" is unique since the nix module system already handles it
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# DEBUG: _module.args = lib.mkOverride 200 (
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# _module.args = (
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# if contextName == "hosts"
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# then repos
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# else
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# assert (
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# repos
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# |> builtins.attrNames
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# |> map (x: "\"${x}\"")
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# |> builtins.concatStringsSep " "
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# |> (x: "FUCK YOU SO BAD: { ${x} }")
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# |> abort
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# );
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# removeAttrs repos ["pkgs"]
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# );
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_module.args = repos;
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nixpkgs =
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if contextName == "hosts"
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then {flake.source = lib.mkIf (decl ? pkgs) (lib.mkOverride 200 decl.pkgs.source);}
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else if contextName == "homes"
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then {
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config = decl.pkgs.config or {};
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overlays = decl.pkgs.overlays or {};
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}
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else {};
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};
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}
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