dotfiles/modules/lib_overlays.nix
Magic_RB 3b5a09f9cb
Enable the extension of lib
Signed-off-by: Magic_RB <magic_rb@redalder.org>
2023-06-18 20:07:47 +02:00

39 lines
1.3 KiB
Nix

{ lib, flake-parts-lib, ... }:
let
inherit (lib)
mkOption
types
;
inherit (flake-parts-lib)
mkSubmoduleOptions
;
in
{
options = {
flake = mkSubmoduleOptions {
libOverlays = mkOption {
# uniq -> ordered: https://github.com/NixOS/nixpkgs/issues/147052
# also update description when done
type = types.lazyAttrsOf (types.uniq (types.functionTo (types.functionTo (types.lazyAttrsOf types.unspecified))));
# This eta expansion exists for the sole purpose of making nix flake check happy.
apply = lib.mapAttrs (_k: f: final: prev: f final prev);
default = { };
example = lib.literalExpression or lib.literalExample ''
{
default = final: prev: {};
}
'';
description = ''
An attribute set of lib overlays, they're similar to normal
[overlays](https://nixos.org/manual/nixpkgs/stable/#chap-overlays).
Note that the overlays themselves are not mergeable. While overlays
can be composed, the order of composition is significant, but the
module system does not guarantee sufficiently deterministic
definition ordering, across versions and when changing `imports`.
'';
};
};
};
}