rustfmt: Discover modules via cfg_select! - #158372

Rollup of 14 pull requests

Successful merges:

 - #159765 (Avoid spurious rebuilds of JSON docs in bootstrap)
 - #159781 (Update bootstrap to use -Zembed-metadata=no instead of -Zno-embed-metadata)
 - #158362 (trait solver: account for universes from replace_bound_vars)
 - #158372 (rustfmt: Discover modules via `cfg_select!`)
 - #159173 (Add allowed list check on EII implementations attributes)
 - #159718 (Make `DocLinkResMap` an `FxIndexMap`)
 - #159722 ( [rustdoc] Retrieve `cfg_attr` information for derived impls for `doc_cfg` feature)
 - #159731 (std: Implement futex on wasip3 targets, update target spec)
 - #159755 (Improve consistency of attribute error messages)
 - #155795 (constify `vec![1, 2, 3]` macro)
 - #157776 (ci: Enable autodiff tests on x86_64 linux)
 - #158766 (Promote riscv64-unknown-linux-musl to tier 2 with host tools)
 - #159271 (str: add ASCII fast path to word_to_titlecase)
 - #159667 (Make some parser structured suggestions verbose and tweak their wording)

Rollup merge of #158372 - mkroening:rustfmt-cfg_select-modules, r=ytmimi,jieyouxu

rustfmt: Discover modules via `cfg_select!`

This PR renames all occurrences of `cfg_match!` in rustfmt to `cfg_select!`. This makes the module file detection logic from rust-lang/rustfmt#6522 kick in for `cfg_select!` instead of `cfg_match!`, which no longer exists.

This PR performs no other adjustments to the logic to be as small as possible.

I am opening this PR in this repo since that is also the target for the more comprehensive #154202, which covers more than merely detecting other files through `cfg_select!`.

Closes #158371.

CC: @ytmimi, @CAD97

Rollup of 14 pull requests

Successful merges:

 - rust-lang/rust#159765 (Avoid spurious rebuilds of JSON docs in bootstrap)
 - rust-lang/rust#159781 (Update bootstrap to use -Zembed-metadata=no instead of -Zno-embed-metadata)
 - rust-lang/rust#158362 (trait solver: account for universes from replace_bound_vars)
 - rust-lang/rust#158372 (rustfmt: Discover modules via `cfg_select!`)
 - rust-lang/rust#159173 (Add allowed list check on EII implementations attributes)
 - rust-lang/rust#159718 (Make `DocLinkResMap` an `FxIndexMap`)
 - rust-lang/rust#159722 ( [rustdoc] Retrieve `cfg_attr` information for derived impls for `doc_cfg` feature)
 - rust-lang/rust#159731 (std: Implement futex on wasip3 targets, update target spec)
 - rust-lang/rust#159755 (Improve consistency of attribute error messages)
 - rust-lang/rust#155795 (constify `vec![1, 2, 3]` macro)
 - rust-lang/rust#157776 (ci: Enable autodiff tests on x86_64 linux)
 - rust-lang/rust#158766 (Promote riscv64-unknown-linux-musl to tier 2 with host tools)
 - rust-lang/rust#159271 (str: add ASCII fast path to word_to_titlecase)
 - rust-lang/rust#159667 (Make some parser structured suggestions verbose and tweak their wording)

[beta] backports

- rustfmt: Discover modules via `cfg_select!` #158372
- Rename splat to avoid stable name collisions #159817
- Rename `#[unroll]` => `#[rustc_unroll]` to mitigate nameres ambiguity #160211
- [beta-1.98] Update cargo submodule #160596

r? me

[beta] backports

- rustfmt: Discover modules via `cfg_select!` #158372
- Rename splat to avoid stable name collisions #159817
- Rename `#[unroll]` => `#[rustc_unroll]` to mitigate nameres ambiguity #160211
- [beta-1.98] Update cargo submodule #160596

r? me

[beta] backports



- rustfmt: Discover modules via `cfg_select!` #158372
- Rename splat to avoid stable name collisions #159817
- Rename `#[unroll]` => `#[rustc_unroll]` to mitigate nameres ambiguity #160211
- [beta-1.98] Update cargo submodule #160596

r? me

Rollup of 14 pull requests

Successful merges:

 - rust-lang/rust#159765 (Avoid spurious rebuilds of JSON docs in bootstrap)
 - rust-lang/rust#159781 (Update bootstrap to use -Zembed-metadata=no instead of -Zno-embed-metadata)
 - rust-lang/rust#158362 (trait solver: account for universes from replace_bound_vars)
 - rust-lang/rust#158372 (rustfmt: Discover modules via `cfg_select!`)
 - rust-lang/rust#159173 (Add allowed list check on EII implementations attributes)
 - rust-lang/rust#159718 (Make `DocLinkResMap` an `FxIndexMap`)
 - rust-lang/rust#159722 ( [rustdoc] Retrieve `cfg_attr` information for derived impls for `doc_cfg` feature)
 - rust-lang/rust#159731 (std: Implement futex on wasip3 targets, update target spec)
 - rust-lang/rust#159755 (Improve consistency of attribute error messages)
 - rust-lang/rust#155795 (constify `vec![1, 2, 3]` macro)
 - rust-lang/rust#157776 (ci: Enable autodiff tests on x86_64 linux)
 - rust-lang/rust#158766 (Promote riscv64-unknown-linux-musl to tier 2 with host tools)
 - rust-lang/rust#159271 (str: add ASCII fast path to word_to_titlecase)
 - rust-lang/rust#159667 (Make some parser structured suggestions verbose and tweak their wording)

This MR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [rust](https://github.com/rust-lang/rust) | tools | minor | `1.97.1` → `1.98.0` |

MR created with the help of [el-capitano/tools/renovate-bot](https://gitlab.com/el-capitano/tools/renovate-bot).

**Proposed changes to behavior should be submitted there as MRs.**

---

### Release Notes

<details>
<summary>rust-lang/rust (rust)</summary>

### [`v1.98.0`](https://github.com/rust-lang/rust/blob/HEAD/RELEASES.md#Version-1980-2026-08-20)

[Compare Source](rust-lang/rust@1.97.1...1.98.0)

\==========================

<a id="1.98.0-Language"></a>

## Language

- [Allow shortening lifetime of `&mut` when unsize-coercing, even in an invariant position.](rust-lang/rust#149219) For example, you can now coerce a `Cell<&'long mut i32>` to a `Cell<&'short mut dyn Send>`. Such shortenings were already previously allowed when coercing a `&mut` to a `&`, or coercing a `&` to a `&`.
- [Add deny-by-default `invalid_runtime_symbol_definitions` lint and warn-by-default `suspicious_runtime_symbol_definitions` lint](rust-lang/rust#155521)
  - The lints currently specifically targets `core` runtime symbols like `memcmp`, `memset`, `strlen`, ... and is planned to be expanded in the next few releases.
- [Add warn-by-default `c_void_returns` lint to check `core::ffi::c_void` as a return type](rust-lang/rust#156379)

<a id="1.98.0-Platform-Support"></a>

## Platform Support

- [Add `powerpc64-unknown-linux-gnuelfv2` as Tier 3](rust-lang/rust#144220)
- [Add `aarch64-unknown-linux-pauthtest` as Tier 3 target](rust-lang/rust#155722)
- [Promote `thumbv7a-none-eabi` to Tier 2](rust-lang/rust#155763)
- [Promote `thumbv7a-none-eabihf` to Tier 2](rust-lang/rust#155763)
- [Promote `thumbv7r-none-eabi` to Tier 2](rust-lang/rust#155763)
- [Promote `thumbv7r-none-eabihf` to Tier 2](rust-lang/rust#155763)
- [Promote `thumbv8r-none-eabihf` to Tier 2](rust-lang/rust#155763)

Refer to Rust's [platform support page][platform-support-doc]
for more information on Rust's tiered platform support.

[platform-support-doc]: https://doc.rust-lang.org/rustc/platform-support.html

<a id="1.98.0-Libraries"></a>

## Libraries

- [Change `Location<'_>` lifetime to `'static` in `Panic[Hook]Info`](rust-lang/rust#146561)
- [Document panic in `RangeInclusive::from(legacy::RangeInclusive)`](rust-lang/rust#155421)
- [Document that `ManuallyDrop`'s `Box` interaction has been fixed](rust-lang/rust#155750)
- [Stabilize LoongArch CRC Intrinsics](rust-lang/rust#156908)
- [The `derive` macro is available at `{core,std}::derive`.](rust-lang/rust#154645) This was previously [unintentionally stabilized in 1.96](rust-lang/rust#159856), but is now [explicitly accepted](rust-lang/rust#154645) as a stabilized API.
  - Please note that the MSRV for `{core,std}::derive` will be 1.96, and not 1.98.

<a id="1.98.0-Stabilized-APIs"></a>

## Stabilized APIs

- [`str::substr_range`](https://doc.rust-lang.org/stable/std/primitive.str.html#method.substr_range)
- [`[T]::subslice_range`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.subslice_range)
- [`core::fmt::NumBuffer`](https://doc.rust-lang.org/stable/core/fmt/struct.NumBuffer.html)
- [`<{integer}>::format_into`](https://doc.rust-lang.org/stable/core/primitive.usize.html#method.format_into)
- [`Send/Sync for std::process::CommandArgs`](https://doc.rust-lang.org/stable/std/process/struct.CommandArgs.html#impl-Send-for-CommandArgs%3C'a%3E)
- [`{fN}::algebraic_add`](https://doc.rust-lang.org/stable/core/primitive.f32.html#method.algebraic_add)
- [`{fN}::algebraic_sub`](https://doc.rust-lang.org/stable/core/primitive.f32.html#method.algebraic_sub)
- [`{fN}::algebraic_mul`](https://doc.rust-lang.org/stable/core/primitive.f32.html#method.algebraic_mul)
- [`{fN}::algebraic_div`](https://doc.rust-lang.org/stable/core/primitive.f32.html#method.algebraic_div)
- [`{fN}::algebraic_rem`](https://doc.rust-lang.org/stable/core/primitive.f32.html#method.algebraic_rem)
- [`NonZero<{integer}>::from_str_radix`](https://doc.rust-lang.org/stable/core/num/struct.NonZero.html#method.from_str_radix-4)
- [`String::from_utf16le`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.from_utf16le)
- [`String::from_utf16le_lossy`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.from_utf16le_lossy)
- [`String::from_utf16be`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.from_utf16be)
- [`String::from_utf16be_lossy`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.from_utf16be_lossy)
- [`[T]::strip_circumfix`](https://doc.rust-lang.org/stable/core/primitive.slice.html#method.strip_circumfix)
- [`str::strip_circumfix`](https://doc.rust-lang.org/stable/core/primitive.str.html#method.strip_circumfix)
- [`Atomic<T>::from_mut`](https://doc.rust-lang.org/stable/core/sync/atomic/struct.Atomic.html#method.from_mut)
- [`Atomic<T>::get_mut_slice`](https://doc.rust-lang.org/stable/core/sync/atomic/struct.Atomic.html#method.get_mut_slice)
- [`Atomic<T>::from_mut_slice`](https://doc.rust-lang.org/stable/core/sync/atomic/struct.Atomic.html#method.from_mut_slice)
- [`std::range::legacy`](https://doc.rust-lang.org/stable/std/range/legacy/index.html)

<a id="1.98.0-Compatibility-Notes"></a>

## Compatibility Notes

- [If fully elided, lifetime bounds of trait object types may now resolve differently or even get rejected in very specific niche scenarios](rust-lang/rust#129543)
- [Error in more cases of ambiguous imports](rust-lang/rust#145108)
- [Switch the destructors implementation for thread locals on Windows to use Fiber Local Storage (FLS)](rust-lang/rust#148799)
- [Convert some cases of the `ambiguous_glob_imports` lint into a hard error](rust-lang/rust#149195)
- [Where-bounds of the form `Type = Type` and `Type == Type` are no longer syntactically allowed](rust-lang/rust#153513)
- [Ensure Send/Sync is not implemented for std::env::Vars{,Os}](rust-lang/rust#155153)
- [Fix that in some attributes, arguments were not properly rejected](rust-lang/rust#155193)
- [`repr(transparent)` is now more strict about which fields have "trivial" layout and hence can be ignored: `repr(C)` types, types with private fields, and `#[non_exhaustive]` types are no longer considered "trivial"](rust-lang/rust#155299)
- [Correctly check whether types have equal size in `transmute()` when some `repr` attributes are involved.](rust-lang/rust#155418)
- [More characters are escaped when printing strings and chars](rust-lang/rust#155527)
- [Implement fast path for `derive(PartialOrd)` when deriving `Ord`](rust-lang/rust#155598)
  This can break crates in practice where a type's PartialOrd and Ord impls were inconsistent with each other.
- [Add temporary scope to `assert_eq` and `assert_ne`](rust-lang/rust#155739)
- Closed a hole in the pattern matching [structural equality](https://doc.rust-lang.org/reference/patterns.html#constant-patterns) check, preventing cases where a match of a constant would be allowed, despite disagreeing with a manually written `PartialEq` implementation, when a `derive(PartialEq)` implementation for that type also exists.
- [On Emscripten the WASM exception handling ABI is now unconditionally used](rust-lang/rust#156928) The `-Zemscripten-wasm-eh=false` flag to switch back to JS exceptions has been removed.
- [The UNSAFE\_CODE lint is now consistently emitted for all unsafe attributes](rust-lang/rust#157201)
- [Solaris: remove `File::lock` implementation, it has the wrong semantics (return "unsupported" instead)](rust-lang/rust#157509)
- [Windows-gnu targets now specify baseline tools versions](rust-lang/rust#158020)
- [rustfmt now discovers module files that are defined in `cfg_select!`](rust-lang/rust#158372)
  This may cause more code to be formatted which was previously ignored.

</details>

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