Refactor: arrange lints in misc_early module
This PR arranges misc_early lints so that they can be accessed more easily.
Basically, I refactored them following the instruction described in #6680.
cc: `@Y-Nak,` `@flip1995,` `@magurotuna`
changelog: Move lints in misc_early module into their own modules.
Fix stack overflow issue in `redundant_pattern_matching`
Fixes#7169
~~cc `@Jarcho` Since tomorrow is release day and we need to get this also fixed in beta, I'll just revert the PR instead of looking into the root issue. Your changes are good, so if you have an idea what could cause this stack overflow and know how to fix it, please open a PR that reverts this revert with a fix.~~
r? `@llogiq`
changelog: none (fixes stack overflow, but this was introduced in this release cycle)
A metadata collection monster
This PR introduces a metadata collection lint as discussed in #4310. It currently collects:
* The lint ID
* The lint declaration file and location (for #1303)
* The lint group
* The documentation
* The applicability (if resolvable)
* If the suggestion is a multi-part-suggestion
This data has a slightly different structure than the current [lints.json](https://github.com/rust-lang/rust-clippy/blob/gh-pages/master/lints.json) and doesn't include depreciated lints yet. I plan to adapt the website to the new format and include depreciated lints in a follow-up PR :). The current collected json looks like this: [metadata_collection.json](https://gist.github.com/xFrednet/6b9e2c3f725f476ba88db9563f67e119)
The entire implementation is guarded behind the `metadata-collector-lint` feature and the `ENABLE_METADATA_COLLECTION` environment value to prevent default collection. You can test the implementation via:
```sh
$ ENABLE_METADATA_COLLECTION=1 cargo test --test dogfood --all-features
```
changelog: none
---
The size of this PR sadly also grew into a small monster, sorry! I definitely plan to improve on this! And it's totally okay if you take your time with this :)
r? `@phansch`
cc: `@flip1995`
needless_collect: Lint cases with type annotations for indirect usage and recognize `BinaryHeap`
fixes#7110
changelog: needless_collect: Lint cases with type annotations for indirect usage and recognize `BinaryHeap`.
Move all `sys::ext` modules to `os`
This PR moves all `sys::ext` modules to `os`, centralizing the location of all `os` code and simplifying the dependencies between `os` and `sys`.
Because this also removes all uses `cfg_if!` on publicly exported items, where after #81969 there were still a few left, this should properly work around https://github.com/rust-analyzer/rust-analyzer/issues/6038.
`@rustbot` label: +T-libs-impl
Update BARE_TRAIT_OBJECT and ELLIPSIS_INCLUSIVE_RANGE_PATTERNS to errors in Rust 2021
This addresses https://github.com/rust-lang/rust/pull/81244 by updating two lints to errors in the Rust 2021 edition.
r? `@estebank`
