…m-clippy

This commit fixes the file names of the `flat_map_identity` test.
Previously, their names were started with `unnecessary_flat_map` even
though the lint rule name is `flat_map_identity`. This inconsistency
happened probably because the rule name was changed during the
discussion in the PR where this rule was introduced.

ref: rust-lang/rust-clippy#4231

Fix file names of flat_map_identity test

This patch fixes the file names of the `flat_map_identity` test.
Previously, their names were started with `unnecessary_flat_map` even though the lint rule name is `flat_map_identity`. This inconsistency happened probably because the rule name was changed during the discussion in the PR where this rule was introduced.

ref: rust-lang/rust-clippy#4231

changelog: none

…sults, r=flip1995

New Lint: Manual Flatten

This is a draft PR for [Issue 6564](rust-lang/rust-clippy#6564).

r? `@camsteffen`

- \[x] Followed [lint naming conventions][lint_naming]
- \[x] Added passing UI tests (including committed `.stderr` file)
- \[x] `cargo test` passes locally
- \[x] Executed `cargo dev update_lints`
- \[x] Added lint documentation
- \[x] Run `cargo dev fmt`

---

*Please write a short comment explaining your change (or "none" for internal only changes)*
changelog: Add new lint [`manual_flatten`] to check for loops over a single `if let` expression with `Result` or `Option`.

In other words, support:

`disallowed_methods = ["alloc::vec::Vec::new"]` (a free function) in
addition to
`disallowed_methods = ["alloc::vec::Vec::leak"]` (a method).

Improve the documentation to clarify that users must specify the full
qualified path for each disallowed function, which can be confusing for
reexports. Include an example `clippy.toml`.

Simplify the actual lint pass so we can reuse `utils::fn_def_id`.

This will convert the path to the Rust repo to an absolute path. This is
important for the clippy_lints/Cargo.toml file. Otherwise if a relative
path is passed, rst-analyzer won't find the Rust repo, because it starts
the relative path search from the clippy_lints dir, not the
rust-clippy dir where the ra_setup command was run from.

Fix typo

This patch fixes a typo.

changelog: none

Use absolute path to Rust repo in ra_setup

This will convert the path to the Rust repo to an absolute path. This is
important for the clippy_lints/Cargo.toml file. Otherwise if a relative
path is passed, rst-analyzer won't find the Rust repo, because it starts
the relative path search from the clippy_lints dir, not the
rust-clippy dir where the ra_setup command was run from.

changelog: none

This fixes false positives and false negatives.

… inside the rustc repo.

Do not check if clippy version matches rustc version when runnning tests inside the rustc repo.
This makes sure that upstream rustc maintainers do not have to deal with our test failing/mismatching versions
when the rustc version bump is happening.
cc rust-lang#6683

This commit adds a new lint named `filter_map_identity`. This lint is
the same as `flat_map_identity` except that it checks for `filter_map`.

Closes rust-lang#6643

…toml

…stream, r=flip1995

tests: ignore check_that_clippy_has_the_same_major_version_as_rustc()inside the rustc repo

Do not check if clippy version matches rustc version when runnning tests inside the rustc repo.
This makes sure that upstream rustc maintainers do not have to deal with our test failing/mismatching versions
when the rustc version bump is happening.
cc rust-lang#6683

We already do the "don't run inside the rustc-repo" workaround for the dogfood test:
https://github.com/rust-lang/rust-clippy/blob/a507c27660d05f37307369d30bee9e82ce3a11e1/tests/dogfood.rs#L16

changelog: None

…ted"

This reverts commit 6626295.

Refactor `PrimitiveTypeTable` for Clippy

I removed `PrimitiveTypeTable` and added `PrimTy::ALL` and `PrimTy::from_name` in its place. This allows Clippy to use `PrimTy::from_name` for the `builtin_type_shadow` lint, and a `const` list of primitive types is deleted from Clippy code (the goal). All changes should be a little faster, if anything.

Co-authored-by: Philipp Krones <hello@philkrones.com>

Fix let_underscore_drop FP

changelog: Fix let_underscore_drop false positives and negatives

Fixes rust-lang#6633

Update triagebot.toml to new label names

changelog: none

Cleanup path-to-local checks

changelog: none

It seemed like too much ceremony going on to check if an expression matches a variable. So I created two util functions `path_to_local(Expr) -> Option<HirId>` and `path_to_local_id(Expr, HirId) -> bool` to make this easier, and used them wherever applicable.

I changed logic in a few places to use `HirId` instead of `Symbol` where it was easy to do so. I believe this is more correct and may even fix some bugs.

I also removed some calls to `qpath_res`. This is not needed if you are only looking for a `Res::Local`.

As a note, I wanted to name the util functions in a way that encourages understanding of the HIR.

…lip1995,phansch

Adds a new lint that checks if there is a semicolon on the last block statement if it returns nothing

changelog: Added a new lint: `SEMICOLON_IF_NOTHING_RETURNED`
fixes rust-lang#6467
Adds the `SEMICOLON_IF_NOTHING_RETURNED` lint and therefore closes rust-lang#6467.

Add new lint `filter_map_identity`

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- \[x] Added passing UI tests (including committed `.stderr` file)
- \[x] `cargo test` passes locally
- \[x] Executed `cargo dev update_lints`
- \[x] Added lint documentation
- \[x] Run `cargo dev fmt`

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This commit adds a new lint named filter_map_identity.
This lint is the same as `flat_map_identity` except that it checks for the usage of `filter_map`.

---

Closes rust-lang#6643

changelog: Added a new lint: `filter_map_identity`

disallowed_methods: Support functions in addition to methods

## Context:

Hey all! I have a particular use case where I'd like to ban certain functions in a code base I work on. For example, I want to ban `Instant::now()` (among others) as we have a time service for mocking time in deterministic simulation tests. Obviously, it doesn't make sense to include a lint like this for all clippy users. Imagine my excitement when I spotted the new `disallowed_methods` lint in clippy--perfect! Unfortunately, after playing around with it for a bit, I was frustrated to realize that it didn't support functions like `Instant::now()`, so I've added support for them in this PR.

It might also make sense to rename the lint from `disallowed_methods` -> `disallowed_functions`, though I've held off from including that rename in this change, since I'm unsure of clippy's breaking change policy.

## Change

Support functions in addition to methods. In other words, support:

`disallowed_methods = ["alloc::vec::Vec::new"]` (a function) in addition to
`disallowed_methods = ["alloc::vec::Vec::leak"]` (a method).

Improve the documentation to clarify that users must specify the full qualified path for each disallowed function, which can be confusing for reexports. Include an example `clippy.toml`.

Simplify the actual lint pass so we can reuse `utils::fn_def_id`.

changelog: disallowed_method: Now supports functions in addition to methods

lintcheck: support git sources

This adds support for git sources in `cargo dev-lintcheck`

You can add a git source to `clippy_dev/lintcheck_crates.toml` by having a `git_url` and a `git_hash` key instead of the `versions` array.
The repo will the be cloned and checked out to the requested commit before checking it with clippy.

Fixes rust-lang/rust-clippy#6642

changelog: lintcheck: support git sources

… crate sources file to use.

Fixes rust-lang#6691

lintcheck: add a cmdline option --crates-toml <TOML PATH> to override crate sources file to use.

Fixes rust-lang#6691

changelog: lintcheck: add --crates-toml  cmdline option to override default crates.toml file.

Downgrade trivial_regex to nursery

See rust-lang#6690. I think there is still value in a trivial_regex lint, but only if clippy can tell that the regex is only ever constructed and applied to a single input.

```rust
let regex = Regex::new("trivial_regex")?;
println!("{}", regex.is_match(s));
// `regex` never used again
```

---

changelog: remove `trivial_regex` from default set of enabled lints

This renames the variants in HIR UnOp from

    enum UnOp {
        UnDeref,
        UnNot,
        UnNeg,
    }

to

    enum UnOp {
        Deref,
        Not,
        Neg,
    }

Motivations:

- This is more consistent with the rest of the code base where most enum
  variants don't have a prefix.

- These variants are never used without the `UnOp` prefix so the extra
  `Un` prefix doesn't help with readability. E.g. we don't have any
  `UnDeref`s in the code, we only have `UnOp::UnDeref`.

- MIR `UnOp` type variants don't have a prefix so this is more
  consistent with MIR types.

- "un" prefix reads like "inverse" or "reverse", so as a beginner in
  rustc code base when I see "UnDeref" what comes to my mind is
  something like "&*" instead of just "*".

Rename "good first issue" back to "good-first-issue"

changelog: none

We use latest nightly rustfmt in our tests anyway

…krgr

Remove rustfmt from rust-toolchain file

We use latest nightly rustfmt in our tests anyway

r? `@matthiaskrgr`

changelog: none

More path-to-local fixes

changelog: Fix some detections of variable usage in closures

Co-authored-by: Phil Hansch <dev@phansch.net>

Stabilize workspace wrapper.

This fixes it so that `cargo clippy` doesn't share the same cache artifacts as `cargo check`. The Cargo side was stabilized a while ago (rust-lang/cargo#8976), so this should be ready to go. I'm not aware of any blockers or concerns.

Closes rust-lang#4612

---

changelog: `cargo clippy` no longer shares the same build cache as `cargo check`.

New lint: `bytes_nth`

This pull request adds a new lint named `bytes_nth`.

---
closes: rust-lang/rust-clippy#6391

changelog: Added a new lint: `bytes_nth`

Fix typo

changelog: none

Fix suggestions that need parens in `from_iter_instead_of_collect` lint

Fixes broken suggestions that need parens (i.e.: range)

Fixes: rust-lang#6648

changelog: none

…, r=flip1995

Fix cargo_common_metadata warning on `publish = false`.

I believe `cargo_common_metadata` shouldn't trigger when `publish = false`, not sure if everybody agrees.
Made some tests to handle all edge-cases.

Fixes rust-lang#6649.

changelog: [`cargo_common_metadata`](https://rust-lang.github.io/rust-clippy/master/index.html#cargo_common_metadata): No longer lints if [`publish = false`](https://doc.rust-lang.org/cargo/reference/manifest.html#the-publish-field) is defined in the manifest

this allows us to check multiple source.tomls and not worry about overriding our logfiles accidentally

some more lintcheck changes

* Explain why tokei is commented out in the lintcheck sources.
* If we specify a custom sources.toml, don't override the preexisting lintcheck logs, but rather start a new log with the filename depending on the sources.toml name.
* Start adding a readme.md to clippy_dev and add some information on how to use the lintcheck subcommand.
* Add support for path/local sources (I needed this for the next item which is: )
* Collect ICEs that happen while clippy checks crates

changelog: more lintcheck changes

Rustup

r? `@ghost`

changelog: none