lix/doc/manual/src/release-notes/rl-next.md

# Release X.Y (202?-??-??)

* The Nix cli now searches for a flake.nix up until the root of the current git repository or a filesystem boundary rather than just in the current directory
* The TOML parser used by `builtins.fromTOML` has been replaced by [a
  more compliant one](https://github.com/ToruNiina/toml11).
* Added `:st`/`:show-trace` commands to nix repl, which are used to
  set or toggle display of error traces.
* New builtin function `builtins.zipAttrsWith` with same functionality
  as `lib.zipAttrsWith` from nixpkgs, but much more efficient.
Move rl-next.md to rl-2.5.md 2021-12-13 15:48:44 +00:00			`# Release X.Y (202?-??-??)`
Update release notes 2021-12-21 13:19:21 +00:00
Apply suggestions from code review Co-authored-by: Théophane Hufschmitt <7226587+thufschmitt@users.noreply.github.com> 2022-01-14 14:16:34 +00:00			`* The Nix cli now searches for a flake.nix up until the root of the current git repository or a filesystem boundary rather than just in the current directory`
Update release notes 2021-12-21 13:19:21 +00:00			* The TOML parser used by `builtins.fromTOML` has been replaced by [a
			`more compliant one](https://github.com/ToruNiina/toml11).`
Add ability to toggle show-trace from within the repl 2021-12-28 13:13:07 +00:00			* Added `:st`/`:show-trace` commands to nix repl, which are used to
			`set or toggle display of error traces.`
add zipAttrsWith primop nixpkgs can save a good bit of eval memory with this primop. zipAttrsWith is used quite a bit around nixpkgs (eg in the form of recursiveUpdate), but the most costly application for this primop is in the module system. it improves the implementation of zipAttrsWith from nixpkgs by not checking an attribute multiple times if it occurs more than once in the input list, allocates less values and set elements, and just avoids many a temporary object in general. nixpkgs has a more generic version of this operation, zipAttrsWithNames, but this version is only used once so isn't suitable for being the base of a new primop. if it were to be used more we should add a second primop instead. 2021-12-25 14:29:49 +00:00			* New builtin function `builtins.zipAttrsWith` with same functionality
			as `lib.zipAttrsWith` from nixpkgs, but much more efficient.