A more efficient sort in some cases, and often convenient.
This exposes `lib.lists.sortOn` immediately on `lib`, because it is
a sibling of `sort`, which is already present there.
Omitting it would lead to more confusion, and worse outcomes.
There's no confusion about the types `sort` or `sortOn` operate on.
Haskell agrees about the type for `sortOn`, and it is in its `base`.
This type is necessary to have correct merging behavior for
`allowUnfreePredicate` and `allowInsecurePredicate`
Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
For the time being, we're moving towards https://nix.dev/ containing
all tutorials and guides. The Nixpkgs manual is reinforced to be a
_reference_ manual. While it's not just reference for now, that's what
the docs team is working towards.
This commits rewrites the Nixpkgs manual introduction to reflect that
and point to some more useful links. The contribution docs are updated
similarly so it's not missed.
Co-authored-by: Valentin Gagarin <valentin.gagarin@tweag.io>
Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
An important idea around the rust stuff in lib.systems is that it's
elaborated — this means that it should idempotently add to the values
passed in, if any. But we missed that the names used for the
parameter and the elaborated value for "rustcTarget"/"config" didn't
line up. The intention was to use "rustcTarget" everywhere in the new
interface, as a more descriptive name than "config".
This fixes setting the system in NixOS configuration, which results in
an already elaborated system being elaborated again. Before, this
wouldn't produce the correct result:
% nix-instantiate --eval -A stdenv.hostPlatform.rust.rustcTarget --system armv7l-linux
"armv7-unknown-linux-gnueabihf"
% NIX_PATH= nix-instantiate --eval -E '(import nixos/lib/eval-config.nix { system = "armv7l-linux"; modules = []; }).pkgs.stdenv.hostPlatform.rust.rustcTarget'
"arm-unknown-linux-gnueabihf"
Fixes: e3e57b8f18 ("lib.systems: elaborate Rust metadata")
Fixes: https://github.com/NixOS/nixpkgs/issues/271000
Usually, attributes passed explicitly to elaborate take precedence
over the elaborated ones, but since we also elaborate the nested
"rust" attrset, we need to push that one level down, so the rest of
"rust" is still filled in if you just pass
{ rust = { config = ... } }.
I've had to drop the assertion that checked that at most one of "rust"
and "rustc" was part of the un-elaborated system, because doing this
broke passing an elaborated system in, which should be idempotent.
For the same reason, I've also had to make it possible for
rust.rustcTargetSpec to be passed in. Otherwise, on the second call,
since platform was filled in by the first, the custom target file
would be constructed. The only other way to avoid this would be to
compare the platform attrs to all built in Rust targets to check it
wasn't one of those, and that isn't feasible.
Fixes: e3e57b8f18 ("lib.systems: elaborate Rust metadata")
- Make fromSource's missing file error message more consistent with others,
and add a test for it
- Indent some function arguments
- Fix an internal type
The aws-sdk-cpp tests are flaky.
Since pull requests to staging cause nix to be rebuilt, this means
that staging PRs end up getting false CI failures due to whatever is
flaky in the AWS SDK tests. Since none of our CI needs to (or
should be able to) contact AWS S3, let's just omit it all. Bonus:
the tests build way faster.
