lib.sources.assertEqual for migrating source filters

[roberth]

Project description

We have upcoming changes in the source filtering library.
Lazy trees will motivate users to make changes to their source filtering expressions.
We could facilitate this by suggesting a simple process and providing a function that supports it.

1. nix eval .#packages.foo.src
2. src = lib.sources.assertEqual <paste original source path here> (<new filtered source, perhaps written from scratch>)
3. iterate and nix eval .#packages.foo.src. When it returns no more relevant differences, remove the lib.assertEqualSourceFilter <path> part.

Refs

• Lazy trees nix#6530
• source combinators: extend, trace, cutAt, focusAt and more #112083
• possibly Path library functions #210426

Metadata

• homepage URL:
• source URL:
• license: mit, bsd, gpl2+ , ...
• platforms: unix, linux, darwin, ...