Nix Release 2.6 (2022-01-24) - New Features and Improvements

doc/manual/source/release-notes/rl-2.6.md

4f201b8b7ca0bda3a6fd5e34ba6c3a3cb6abb41641c984ef000000030000042c

# Release 2.6 (2022-01-24)

* 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* The TOML parser used by `builtins.fromTOML` has been replaced by [a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 the same
  functionality as `lib.zipAttrsWith` from Nixpkgs, but much more
  efficient.
* New command `nix store copy-log` to copy build logs from one store
  to another.
* The `commit-lockfile-summary` option can be set to a non-empty
  string to override the commit summary used when committing an updated
  lockfile.  This may be used in conjunction with the `nixConfig`
  attribute in `flake.nix` to better conform to repository
  conventions.
* `docker run -ti nixos/nix:master` will place you in the Docker
  container with the latest version of Nix from the `master` branch.

Chunks

3eedc8ce (1st chunk of `doc/manual/source/release-notes/rl-2.6.md`)

Title: Nix Release 2.6 (2022-01-24) - New Features and Improvements

Summary

Release 2.6 of the Nix package manager introduces several new features and improvements, including enhanced flake.nix searching, a more compliant TOML parser, new commands for the Nix REPL, a more efficient `builtins.zipAttrsWith` function, a `nix store copy-log` command, and the ability to customize commit summaries for lockfile updates. Additionally, the Nix Docker image now uses the latest version from the master branch.