lib.attrsets.collect

Recursively collect sets that verify a given predicate named pred from the set attrs. The recursion is stopped when the predicate is verified.

Inputs

pred

Given an attribute's value, determine if recursion should stop.

attrs

The attribute set to recursively collect.

Type

collect :: (AttrSet -> Bool) -> AttrSet -> [x]

Examples

collect isList { a = { b = ["b"]; }; c = [1]; }
=> [["b"] [1]]

collect (x: x ? outPath)
   { a = { outPath = "a/"; }; b = { outPath = "b/"; }; }
=> [{ outPath = "a/"; } { outPath = "b/"; }]

Noogle detected

• lib.collect

collect =
    pred:
    attrs:
    if pred attrs then
      [ attrs ]
    else if isAttrs attrs then
      concatMap (collect pred) (attrValues attrs)
    else
      [];