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543e3aaa4d
`nullOr`'s merge function requires definitions to all be null or all be non-null. It was being used where the intent was that null be used as a value representing unset, and as such the merge should return null if all definitions are null and ignore nulls otherwise. This adds a type with that merge semantics.
34 lines
757 B
Nix
34 lines
757 B
Nix
# flakelight -- Framework for simplifying flake setup
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# Copyright (C) 2023 Archit Gupta <archit@accelbread.com>
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# SPDX-License-Identifier: MIT
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{ config, lib, flakelight, moduleArgs, ... }:
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let
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inherit (lib) mkMerge mkOption mkIf;
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inherit (lib.types) lazyAttrsOf;
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inherit (flakelight.types) nullable optCallWith overlay;
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in
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{
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options = {
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overlay = mkOption {
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type = nullable overlay;
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default = null;
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};
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overlays = mkOption {
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type = optCallWith moduleArgs (lazyAttrsOf overlay);
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default = { };
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};
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};
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config = mkMerge [
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(mkIf (config.overlay != null) {
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overlays.default = config.overlay;
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})
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(mkIf (config.overlays != { }) {
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outputs = { inherit (config) overlays; };
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})
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];
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}
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