Add release notes

This commit is contained in:
Eelco Dolstra 2022-11-23 15:24:50 +01:00
parent 6292d5616e
commit 989fc8a8b9

View file

@ -10,3 +10,43 @@
This avoids a lot of spurious errors where some benign strings end-up having This avoids a lot of spurious errors where some benign strings end-up having
a context just because they are read from a store path a context just because they are read from a store path
([#7260](https://github.com/NixOS/nix/pull/7260)). ([#7260](https://github.com/NixOS/nix/pull/7260)).
* Nix can now automatically pick UIDs for builds, removing the need to
create `nixbld*` user accounts. these UIDs are allocated starting at
872415232 on Linux and 56930 on macOS.
This is an experimental feature. To enable it, add the following to
`nix.conf`:
```
extra-experimental-features = auto-allocate-uids
auto-allocate-uids = true
```
* On Linux, Nix can now run builds in a user namespace where the build
runs as root (UID 0) and has 65,536 UIDs available. This is
primarily useful for running containers such as `systemd-nspawn`
inside a Nix build.
A build can enable this by requiring the `uid-range` system feature,
i.e. by setting the derivation attribute
```
requiredSystemFeatures = [ "uid-range" ];
```
The `uid-range` system feature requires the `auto-allocate-uids`
setting to be enabled (see above).
* On Linux, Nix has experimental support for running builds inside a
cgroup. It can be enabled by adding
```
extra-experimental-features = cgroups
```
to `nix.conf`. It is also automatically enabled for builds that
require the `uid-range` system feature.
* `nix build --json` now prints some statistics about top-level
derivations, such as CPU statistics when cgroups are enabled.