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.
41 lines
1011 B
Nix
41 lines
1011 B
Nix
# flakelight -- Framework for simplifying flake setup
|
|
# Copyright (C) 2023 Archit Gupta <archit@accelbread.com>
|
|
# SPDX-License-Identifier: MIT
|
|
|
|
{ config, lib, flakelight, genSystems, ... }:
|
|
let
|
|
inherit (lib) isFunction mapAttrs mkIf mkMerge mkOption;
|
|
inherit (lib.types) lazyAttrsOf raw;
|
|
inherit (flakelight.types) nullable optFunctionTo;
|
|
|
|
isApp = x: (x ? type) && (x.type == "app") && (x ? program);
|
|
|
|
mkApp = pkgs: app:
|
|
let app' = if isFunction app then app pkgs else app; in
|
|
if isApp app' then app' else { type = "app"; program = "${app'}"; };
|
|
in
|
|
{
|
|
options = {
|
|
app = mkOption {
|
|
type = nullable raw;
|
|
default = null;
|
|
};
|
|
|
|
apps = mkOption {
|
|
type = nullable (optFunctionTo (lazyAttrsOf raw));
|
|
default = null;
|
|
};
|
|
};
|
|
|
|
config = mkMerge [
|
|
(mkIf (config.app != null) {
|
|
apps.default = config.app;
|
|
})
|
|
|
|
(mkIf (config.apps != null) {
|
|
outputs.apps = genSystems (pkgs:
|
|
mapAttrs (_: mkApp pkgs) (config.apps pkgs));
|
|
})
|
|
];
|
|
}
|