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release-notes: Add nixpkgs.hostPlatform changes

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Robert Hensing 2022-06-16 22:53:22 +02:00
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59
nixos/doc/manual/from_md/release-notes/rl-2211.section.xml
View file

@ -31,6 +31,65 @@
<literal>stdenv.buildPlatform.canExecute stdenv.hostPlatform</literal>.
</para>
</listitem>
<listitem>
<para>
The <literal>nixpkgs.hostPlatform</literal> and
<literal>nixpkgs.buildPlatform</literal> options have been
added. These cover and override the
<literal>nixpkgs.{system,localSystem,crossSystem}</literal>
options.
</para>
<itemizedlist spacing="compact">
<listitem>
<para>
<literal>hostPlatform</literal> is the platform or
<quote><literal>system</literal></quote> string of the
NixOS system described by the configuration.
</para>
</listitem>
<listitem>
<para>
<literal>buildPlatform</literal> is the platform that is
responsible for building the NixOS configuration. It
defaults to the <literal>hostPlatform</literal>, for a
non-cross build configuration. To cross compile, set
<literal>buildPlatform</literal> to a different value.
</para>
</listitem>
</itemizedlist>
<para>
The new options convey the same information, but with fewer
options, and following the Nixpkgs terminology.
</para>
<para>
The existing options
<literal>nixpkgs.{system,localSystem,crossSystem}</literal>
have not been formally deprecated, to allow for evaluation of
the change and to allow for a transition period so that in
time the ecosystem can switch without breaking compatibility
with any supported NixOS release.
</para>
</listitem>
<listitem>
<para>
<literal>nixos-generate-config</literal> now generates
configurations that can be built in pure mode. This is
achieved by setting the new
<literal>nixpkgs.hostPlatform</literal> option.
</para>
<para>
You may have to unset the <literal>system</literal> parameter
in <literal>lib.nixosSystem</literal>, or similarly remove
definitions of the
<literal>nixpkgs.{system,localSystem,crossSystem}</literal>
options.
</para>
<para>
Alternatively, you can remove the
<literal>hostPlatform</literal> line and use NixOS like you
would in NixOS 22.05 and earlier.
</para>
</listitem>
<listitem>
<para>
PHP now defaults to PHP 8.1, updated from 8.0.

27
nixos/doc/manual/release-notes/rl-2211.section.md
View file

@ -17,6 +17,33 @@ In addition to numerous new and upgraded packages, this release has the followin
built for `stdenv.hostPlatform` (i.e. produced by `stdenv.cc`) by evaluating
`stdenv.buildPlatform.canExecute stdenv.hostPlatform`.
- The `nixpkgs.hostPlatform` and `nixpkgs.buildPlatform` options have been added.
These cover and override the `nixpkgs.{system,localSystem,crossSystem}` options.
- `hostPlatform` is the platform or "`system`" string of the NixOS system
described by the configuration.
- `buildPlatform` is the platform that is responsible for building the NixOS
configuration. It defaults to the `hostPlatform`, for a non-cross
build configuration. To cross compile, set `buildPlatform` to a different
value.
The new options convey the same information, but with fewer options, and
following the Nixpkgs terminology.
The existing options `nixpkgs.{system,localSystem,crossSystem}` have not
been formally deprecated, to allow for evaluation of the change and to allow
for a transition period so that in time the ecosystem can switch without
breaking compatibility with any supported NixOS release.
- `nixos-generate-config` now generates configurations that can be built in pure
mode. This is achieved by setting the new `nixpkgs.hostPlatform` option.
You may have to unset the `system` parameter in `lib.nixosSystem`, or similarly
remove definitions of the `nixpkgs.{system,localSystem,crossSystem}` options.
Alternatively, you can remove the `hostPlatform` line and use NixOS like you
would in NixOS 22.05 and earlier.
- PHP now defaults to PHP 8.1, updated from 8.0.
- `hardware.nvidia` has a new option `open` that can be used to opt in the opensource version of NVIDIA kernel driver. Note that the driver's support for GeForce and Workstation GPUs is still alpha quality, see [NVIDIA Releases Open-Source GPU Kernel Modules](https://developer.nvidia.com/blog/nvidia-releases-open-source-gpu-kernel-modules/) for the official announcement.