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cf0aad391c
Because `extraPackages` and `overrides` expect functions as values it has not been possible to perform merges. This adds suitable types for these options that allow reasonable merging.
29 lines
709 B
Nix
29 lines
709 B
Nix
{ lib }:
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with lib;
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{
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selectorFunction = mkOptionType {
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name = "selectorFunction";
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description =
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"Function that takes an attribute set and returns a list"
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+ " containing a selection of the values of the input set";
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check = isFunction;
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merge = _loc: defs:
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as: concatMap (select: select as) (getValues defs);
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};
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overlayFunction = mkOptionType {
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name = "overlayFunction";
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description =
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"An overlay function, takes self and super and returns"
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+ " an attribute set overriding the desired attributes.";
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check = isFunction;
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merge = _loc: defs:
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self: super:
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foldl' (res: def: mergeAttrs res (def.value self super)) {} defs;
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};
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}
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