forked from extern/flakelight
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.
40 lines
972 B
Nix
40 lines
972 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, genSystems, ... }:
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let
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inherit (lib) isFunction mapAttrs mkMerge mkOption mkIf;
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inherit (lib.types) lazyAttrsOf;
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inherit (flakelight.types) function nullable optFunctionTo;
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wrapBundler = pkgs: bundler: drv:
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if isFunction (bundler (pkgs // drv))
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then bundler pkgs drv
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else bundler drv;
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in
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{
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options = {
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bundler = mkOption {
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type = nullable function;
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default = null;
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};
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bundlers = mkOption {
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type = nullable (optFunctionTo (lazyAttrsOf function));
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default = null;
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};
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};
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config = mkMerge [
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(mkIf (config.bundler != null) {
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bundlers.default = config.bundler;
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})
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(mkIf (config.bundlers != null) {
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outputs.bundlers = genSystems (pkgs:
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mapAttrs (_: wrapBundler pkgs) (config.bundlers pkgs));
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})
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];
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}
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