bonfire/lib/attrs.nix

23 lines
764 B
Nix
Raw Normal View History

2023-06-06 23:18:09 +05:00
{ lib, ... }:
with builtins;
with lib;
rec {
# attrsToList
attrsToList = attrs: mapAttrsToList (name: value: { inherit name value; }) attrs;
# mapFilterAttrs ::
# (name -> value -> bool)
# (name -> value -> { name = any; value = any; })
# attrs
mapFilterAttrs = pred: f: attrs: filterAttrs pred (mapAttrs' f attrs);
# Generate an attribute set by mapping a function over a list of values.
genAttrs' = values: f: listToAttrs (map f values);
# anyAttrs :: (name -> value -> bool) attrs
anyAttrs = pred: attrs: any (attr: pred attr.name attr.value) (attrsToList attrs);
# countAttrs :: (name -> value -> bool) attrs
countAttrs = pred: attrs: count (attr: pred attr.name attr.value) (attrsToList attrs);
}