Use toString on attrs having outPath

[vic]

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[Copilot]

Pull Request Overview

This PR extends the import-tree logic to recognize attribute sets that provide an outPath, treating them like file trees. It introduces a new hasOutPath predicate and updates tests to verify this behavior.

• Add a branch in default.nix to call listFilesRecursive on x.outPath when hasOutPath x is true.
• Define a helper hasOutPath predicate.
• Add a new test case in checkmate.nix to cover attr-sets with outPath.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
default.nix	Add hasOutPath helper and branch to handle attrs with outPath.
checkmate.nix	Add test verifying import-tree works on attr-sets with outPath.

Comments suppressed due to low confidence (2)

default.nix:74

• [nitpick] Consider adding a brief comment above hasOutPath to explain its purpose (detecting attr-sets with an outPath) for future maintainers.

  hasOutPath = and (x: x ? outPath) builtins.isAttrs;

checkmate.nix:197

• [nitpick] The test name is a bit vague—consider renaming it to something more descriptive like test import-tree accepts attr-set with outPath.

        import-tree."test take as arg anything path convertible" = {