We’re already allowing `/tmp` anyway, so this should be harmless,
and it fixes a regression in the default configuration caused by
moving the build directories out of `temp-dir`. (For instance, that
broke the Lix `guessOrInventPath.sockets` test.)

Note that removing `/tmp` breaks quite a few builds, so although it may
be a good idea in general it would require work on the Nixpkgs side.

Fixes: 749afbb
Change-Id: I6a6a69645f429bc50d4cb24283feda3d3091f534

(This is a cherry-pick of commit d1db3e5)

Lix patch: https://gerrit.lix.systems/c/lix/+/3500

(cherry picked from commit 5cd9443)

…/pr-13468

libstore: fix Unix sockets in the build directory on sandboxed macOS (backport NixOS#13468)

Previously, `nix help shell` failed with "Nix has no subcommand 'shell'" despite `nix shell --help`
working correctly. This happened because the `shell` command is actually an alias for `env shell`,
and the help system wasn't resolving aliases when looking up documentation.

This patch modifies the `showHelp` function to check for and resolve aliases before generating the
manpage name, ensuring that shorthand commands like `shell` get proper help documentation.

Closes: NixOS#13431
(cherry picked from commit d678b07)

…/pr-13496

Fix `nix help shell` by properly handling command aliases (backport NixOS#13496)

(cherry picked from commit ee9b57c)

(cherry picked from commit 6896761)

(cherry picked from commit e7af2e6)

…ition blocks

(cherry picked from commit 41bf87e)

* It is tough to contribute to a project that doesn't use a formatter,
* It is extra hard to contribute to a project which has configured the formatter, but ignores it for some files
* Code formatting makes it harder to hide obscure / weird bugs by accident or on purpose,

Let's rip the bandaid off?

Note that PRs currently in flight should be able to be merged relatively easily by applying `clang-format` to their tip prior to merge.

Co-authored-by: Graham Christensen <[email protected]>

Co-authored-by: Graham Christensen <[email protected]>

…/pr-13108

Rip off the bandaid: Format the codebase with clang-format (backport NixOS#13108)

(cherry picked from commit 6db6190)

…/pr-13514

treewide: Fix Meson CPU names for powerpc CPUs (backport NixOS#13514)

…/pr-13520

meson: Correctly handle endianness for PowerPC CPU families (backport NixOS#13520)

Fixes NixOS#13532.

(cherry picked from commit 54dc531)

…/pr-13535

Fix nix_system_cpu on i686-linux (backport NixOS#13535)

Tagging release 2.30.2