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