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27th chunk of `nixos/doc/manual/release-notes/rl-2411.section.md`
255031f4b10032e18685087ff77fda3f998e32fab2def95a0000000100000c4e
- [`lib.getLicenseFromSpdxIdOr`](https://nixos.org/manual/nixpkgs/unstable/#function-library-lib.meta.getLicenseFromSpdxIdOr): Get the corresponding attribute in `lib.licenses` from an SPDX ID or fall back to the given default value.
- [`lib.licensesSpdx`](https://nixos.org/manual/nixpkgs/unstable/#function-library-lib.meta.licensesSpdx): Mapping of SPDX ID to the attributes in `lib.licenses`.
- [`lib.getFirstOutput`](https://nixos.org/manual/nixpkgs/unstable/#function-library-lib.attrsets.getFirstOutput): Like `getOutput` but with a list of fallback output names.
- [`lib.getInclude`](https://nixos.org/manual/nixpkgs/unstable/#function-library-lib.attrsets.getInclude) and [`lib.getStatic`](https://nixos.org/manual/nixpkgs/unstable/#function-library-lib.attrsets.getStatic): Get a package’s `include`/`static` output.
- [`lib.trim`](https://nixos.org/manual/nixpkgs/unstable/#function-library-lib.strings.trim) and [`lib.trimWith`](https://nixos.org/manual/nixpkgs/unstable/#function-library-lib.strings.trimWith): Remove leading and trailing whitespace from a string.
- [`lib.meta.defaultPriority`](https://nixos.org/manual/nixpkgs/unstable/#function-library-lib.meta.defaultPriority): The default priority of packages in Nix.
- [`lib.toExtension`](https://nixos.org/manual/nixpkgs/unstable/#function-library-lib.fixedPoints.toExtension): Convert to an extending function (overlay).
- `lib.fetchers.normalizeHash`: Convert an attrset containing one of `hash`, `sha256` or `sha512` into one containing `outputHash{,Algo}` as accepted by `mkDerivation`.
- `lib.fetchers.withNormalizedHash`: Wraps a function which accepts `outputHash{,Algo}` into one which accepts `hash`, `sha256` or `sha512`.
- Various builtins are now reexported in a more standard way:
  - `lib.map` -> `lib.lists.map` -> `builtins.map`
  - `lib.intersectAttrs` -> `lib.attrsets.intersectAttrs` -> `builtins.intersectAttrs`
  - `lib.removeAttrs` -> `lib.attrsets.removeAttrs` -> `builtins.removeAttrs`
  - `lib.match` -> `lib.strings.match` -> `builtins.match`
  - `lib.split` -> `lib.strings.split` -> `builtins.split`
  - `lib.typeOf` -> `builtins.typeOf`
  - `lib.unsafeGetAttrPos` -> `builtins.unsafeGetAttrPos`
- [`lib.cli.toGNUCommandLine`](https://nixos.org/manual/nixpkgs/unstable/#function-library-lib.cli.toGNUCommandLine) now supports the `optionValueSeparator` argument attribute to control the key-value separator for arguments.

Documentation improvements:
- Much of the documentation has been migrated to the [standard doc-comment format](https://github.com/NixOS/rfcs/pull/145), including [`lib.derivations`](https://nixos.org/manual/nixpkgs/unstable/#sec-functions-library-derivations), [`lib.fixedPoints`](https://nixos.org/manual/nixpkgs/unstable/#sec-functions-library-fixedPoints), [`lib.gvariant`](https://nixos.org/manual/nixpkgs/unstable/#sec-functions-library-gvariant), [`lib.filesystem`](https://nixos.org/manual/nixpkgs/unstable/#sec-functions-library-filesystem), [`lib.strings`](https://nixos.org/manual/nixpkgs/unstable/#sec-functions-library-strings), [`lib.meta`](https://nixos.org/manual/nixpkgs/unstable/#sec-functions-library-meta).
Title: Nixpkgs Library Additions, Improvements, and Documentation Updates
Summary
This section outlines further additions and improvements to the Nixpkgs library, including new functions like `lib.meta.defaultPriority`, `lib.toExtension`, `lib.fetchers.normalizeHash`, and `lib.fetchers.withNormalizedHash`. It details the re-exporting of various builtins in a standardized manner and enhancements to `lib.cli.toGNUCommandLine`. The section also notes significant documentation improvements, with many library functions migrated to the standard doc-comment format.