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Rollup of 9 pull requests #125743

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Rollup of 9 pull requests #125743

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@fmease fmease commented May 29, 2024

Successful merges:

r? @ghost
@rustbot modify labels: rollup

Create a similar rollup

nnethercote and others added 24 commits May 29, 2024 16:24
By default, `x fmt` formats/checks modified files. But it also lets you
choose one or more paths instead.

This adds significant complexity to `x fmt`. Explicit paths are
specified via `WalkBuilder::add` rather than `OverrideBuilder::add`. The
`ignore` library is not simple, and predicting the interactions between
the two mechanisms is difficult.

Here's a particularly interesting case.
- You can request a path P that is excluded by the `ignore` list in the
  `rustfmt.toml`. E.g. `x fmt tests/ui/` or `x fmt tests/ui/bitwise.rs`.
- `x fmt` will add P to the walker (via `WalkBuilder::add`), traverse it
  (paying no attention to the `ignore` list from the `rustfmt.toml`
  file, due to the different mechanism), and call `rustfmt` on every
  `.rs` file within it.
- `rustfmt` will do nothing to those `.rs` files, because it *also*
  reads `rustfmt.toml` and sees that they match the `ignore` list!

It took me *ages* to debug and understand this behaviour. Not good!

`x fmt` even lets you name a path below the current directory. This was
intended to let you do things like `x fmt std` that mirror things like
`x test std`. This works by looking for `std` and finding `library/std`,
and then formatting that. Unfortuantely, this motivating case now gives
an error. When support was added in rust-lang#107944, `library/std` was the only
directory named `std`. Since then, `tests/ui/std` was added, and so `x
fmt std` now gives an error.

In general, explicit paths don't seem particularly useful. The only two
cases `x fmt` really needs are:
- format/check the files I have modified (99% of uses)
- format/check all files

(While respecting the `ignore` list in `rustfmt.toml`, of course.)

So this commit moves to that model. `x fmt` will now give an error if
given an explicit path. `x fmt` now also supports a `--all` option. (And
running with `GITHUB_ACTIONS=true` also causes everything to be
formatted/checked, as before.) Much simpler!
- Precede them all with `fmt` so it's clear where they are coming from.
- Use `error:` and `warning:` when appropriate.
- Print warnings to stderr instead of stdout
Currently, `x fmt` can print two lists of files.
- The untracked files that are skipped. Always done if within a git
  repo.
- The modified files that are formatted.

But if you run with `--all` (or with `GITHUB_ACTIONS=true`) it doesn't
print anything about which files are formatted.

This commit increases consistency.
- The formatted/checked files are now always printed. And it makes it clear why
  a file was formatted, e.g. with "modified".
- It uses the same code for both untracked files and formatted/checked
  files. This means that now if there are a lot of untracked files just
  the number will be printed, which is like the old behaviour for
  modified files.

Example output:
```
fmt: skipped 31 untracked files
fmt: formatted modified file compiler/rustc_mir_transform/src/instsimplify.rs
fmt: formatted modified file compiler/rustc_mir_transform/src/validate.rs
fmt: formatted modified file library/core/src/ptr/metadata.rs
fmt: formatted modified file src/bootstrap/src/core/build_steps/format.rs
```
or (with `--all`):
```
fmt: checked 3148 files
```
It's a weird name, the `fmt_` prefix seems unnecessary.
- Avoid calling `try_wait` followed immediately by `wait`.
- Make the match exhaustive.
- Improve the comment.
…lint, r=jieyouxu

Migrate `run-make/const-prop-lint` to `rmake.rs`

Part of rust-lang#121876.

r? `@jieyouxu`
…ouxu

Rewrite `fpic`, `simple-dylib` and `issue-37893` `run-make` tests in `rmake.rs` or ui test format

Part of rust-lang#121876 and the associated [Google Summer of Code project](https://blog.rust-lang.org/2024/05/01/gsoc-2024-selected-projects.html).
…GuillaumeGomez

Streamline `x fmt` and improve its output

- Removes the ability to pass paths to `x fmt`, because it's complicated and not useful, and adds `--all`.
- Improves `x fmt` output.
- Improves `x fmt`'s internal code.

r? `@GuillaumeGomez`
…=WaffleLapkin

[ACP 362] genericize `ptr::from_raw_parts`

This implements rust-lang/libs-team#362

As such, it can partially undo rust-lang#124795 , letting `slice_from_raw_parts` just call `from_raw_parts` again without re-introducing the unnecessary cast to MIR.

By doing this it also removes a spurious cast from `str::from_raw_parts`.  And I think it does a good job of showing the value of the ACP, since the only thing that needed new turbofishing because of this is inside `ptr::null(_mut)`, but only because `ptr::without_provenance(_mut)` doesn't support pointers to extern types, which it absolutely could (without even changing the implementation).
…ate-data-smoke, r=jieyouxu

Migrate `run-make/crate-data-smoke` to `rmake.rs`

Part of rust-lang#121876.

r? `@jieyouxu`
…m, r=fmease

Add lang items for `AsyncFn*`, `Future`, `AsyncFnKindHelper`'s associated types

Adds lang items for `AsyncFnOnce::Output`, `AsyncFnOnce::CallOnceFuture`, `AsyncFnMut::CallRefFuture`, and uses them in the new solver. I'm mostly interested in doing this to help accelerate uplifting the new trait solver into a separate crate.

The old solver is kind of spaghetti, so I haven't moved that to use these lang items (i.e. it still uses `item_name`-based comparisons).

update: Also adds lang items for `Future::Output` and `AsyncFnKindHelper::Upvars`.

cc `@lcnr`
ast: Revert a breaking attribute visiting order change

Fixes rust-lang#124535
Fixes rust-lang#125201
@rustbot rustbot added A-testsuite Area: The testsuite used to check the correctness of rustc S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue. WG-trait-system-refactor The Rustc Trait System Refactor Initiative labels May 29, 2024
@rustbot rustbot added the rollup A PR which is a rollup label May 29, 2024
@fmease fmease closed this May 29, 2024
@fmease fmease deleted the rollup-o0djket branch May 29, 2024 23:23
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A-testsuite Area: The testsuite used to check the correctness of rustc rollup A PR which is a rollup S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-libs Relevant to the library team, which will review and decide on the PR/issue. WG-trait-system-refactor The Rustc Trait System Refactor Initiative
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8 participants