58 lines
1.4 KiB
Nix
58 lines
1.4 KiB
Nix
{ lib, ... }:
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let
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inherit (lib)
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filterAttrs
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foldl
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listToAttrs
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mapAttrs'
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nameValuePair
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recursiveUpdate
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;
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in
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{
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# Filter a generated set of attrs using a predicate function.
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#
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# mapFilterAttrs ::
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# (name -> value -> bool)
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# (name -> value -> { name = any; value = any; })
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# attrs
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mapFilterAttrs = pred: f: attrs: filterAttrs pred (mapAttrs' f attrs);
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# Generate an attribute set by mapping a function over a list of values.
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#
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# genAttrs' ::
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# [ values ]
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# (value -> { name = any; value = any; })
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# attrs
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genAttrs' = values: f: listToAttrs (map f values);
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# Merge a list of attrs non-recursively, later values override previous ones.
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#
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# merge ::
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# [ attrs ]
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# attrs
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merge = foldl (a: b: a // b) { };
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# Merge a list of attrs recursively, later values override previous ones.
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#
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# recursiveMerge ::
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# [ attrs ]
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# attrs
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recursiveMerge = foldl recursiveUpdate { };
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# Rename each of the attributes in an attribute set using the mapping function
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#
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# renameAttrs ::
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# (name -> new name)
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# attrs
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renameAttrs = f: mapAttrs' (name: value: nameValuePair (f name) value);
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# Rename each of the attributes in an attribute set using a function which
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# takes the attribute's name and value as inputs.
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#
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# renameAttrs' ::
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# (name -> value -> new name)
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# attrs
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renameAttrs' = f: mapAttrs' (name: value: nameValuePair (f name value) value);
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}
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