45 lines
1.0 KiB
Nix
45 lines
1.0 KiB
Nix
{
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inputs,
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pkgs,
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lib,
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...
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}: rec {
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# Convenience wrapper for "mkOption" with boolean type.
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mkBoolOption = def: desc:
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lib.mkOption {
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type = lib.types.bool;
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default = def;
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description = desc;
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};
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# Like "lib.mkIf" but the predicate is inverted.
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# Returns "do" if "pred" is false.
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mkElse = pred: do: (lib.mkIf (!pred) do);
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# Returns "true" if "base" contains "element".
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contains = base: element:
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lib.any (x: x == element) base;
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# Returns "base" without occurences of elements that are also in "remove".
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without = base: remove:
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lib.filter (x: !(contains remove x)) base;
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# Used with attrSets with a single element.
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# Returns the name of the single attr.
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attrName = set: let
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names = lib.attrNames set;
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in
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if (names != [])
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then (lib.head names)
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else null;
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# Used with attrSets with a single element.
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# Returns the value of the single attr.
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attrValue = set: let
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values = lib.attrValues set;
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in
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if (values != [])
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then (lib.head values)
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else null;
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}
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