Auto merge of rust-lang#99865 - flip1995:clippyup, r=Manishearth

Update Clippy

r? `@Manishearth`

Author: bors

Cargo.lock

@@ -689,6 +689,7 @@ dependencies = [
  "tester",
  "tokio",
  "toml",
+ "walkdir",
 ]
 
 [[package]]

src/tools/clippy/CHANGELOG.md

@@ -3437,9 +3437,11 @@ Released 2018-09-13
 [`almost_complete_letter_range`]: https://rust-lang.github.io/rust-clippy/master/index.html#almost_complete_letter_range
 [`almost_swapped`]: https://rust-lang.github.io/rust-clippy/master/index.html#almost_swapped
 [`approx_constant`]: https://rust-lang.github.io/rust-clippy/master/index.html#approx_constant
+[`arithmetic`]: https://rust-lang.github.io/rust-clippy/master/index.html#arithmetic
 [`as_conversions`]: https://rust-lang.github.io/rust-clippy/master/index.html#as_conversions
 [`as_underscore`]: https://rust-lang.github.io/rust-clippy/master/index.html#as_underscore
 [`assertions_on_constants`]: https://rust-lang.github.io/rust-clippy/master/index.html#assertions_on_constants
+[`assertions_on_result_states`]: https://rust-lang.github.io/rust-clippy/master/index.html#assertions_on_result_states
 [`assign_op_pattern`]: https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
 [`assign_ops`]: https://rust-lang.github.io/rust-clippy/master/index.html#assign_ops
 [`async_yields_async`]: https://rust-lang.github.io/rust-clippy/master/index.html#async_yields_async
@@ -3793,6 +3795,7 @@ Released 2018-09-13
 [`nonsensical_open_options`]: https://rust-lang.github.io/rust-clippy/master/index.html#nonsensical_open_options
 [`nonstandard_macro_braces`]: https://rust-lang.github.io/rust-clippy/master/index.html#nonstandard_macro_braces
 [`not_unsafe_ptr_arg_deref`]: https://rust-lang.github.io/rust-clippy/master/index.html#not_unsafe_ptr_arg_deref
+[`obfuscated_if_else`]: https://rust-lang.github.io/rust-clippy/master/index.html#obfuscated_if_else
 [`octal_escapes`]: https://rust-lang.github.io/rust-clippy/master/index.html#octal_escapes
 [`ok_expect`]: https://rust-lang.github.io/rust-clippy/master/index.html#ok_expect
 [`only_used_in_recursion`]: https://rust-lang.github.io/rust-clippy/master/index.html#only_used_in_recursion

src/tools/clippy/Cargo.toml

@@ -32,6 +32,7 @@ compiletest_rs = { version = "0.8", features = ["tmp"] }
 tester = "0.9"
 regex = "1.5"
 toml = "0.5"
+walkdir = "2.3"
 # This is used by the `collect-metadata` alias.
 filetime = "0.2"
 

src/tools/clippy/book/src/continuous_integration/github_actions.md

@@ -1,7 +1,7 @@
 # GitHub Actions
 
-On the GitHub hosted runners, Clippy from the latest stable Rust version comes
-pre-installed. So all you have to do is to run `cargo clippy`.
+GitHub hosted runners using the latest stable version of Rust have Clippy pre-installed.
+It is as simple as running `cargo clippy` to run lints against the codebase.
 
 ```yml
 on: push
@@ -15,7 +15,7 @@ jobs:
   clippy_check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v3
       - name: Run Clippy
         run: cargo clippy --all-targets --all-features
 ```

src/tools/clippy/book/src/development/adding_lints.md

@@ -10,6 +10,10 @@ because that's clearly a non-descriptive name.
 - [Adding a new lint](#adding-a-new-lint)
   - [Setup](#setup)
   - [Getting Started](#getting-started)
+    - [Defining Our Lint](#defining-our-lint)
+      - [Standalone](#standalone)
+      - [Specific Type](#specific-type)
+      - [Tests Location](#tests-location)
   - [Testing](#testing)
     - [Cargo lints](#cargo-lints)
   - [Rustfix tests](#rustfix-tests)
@@ -36,17 +40,38 @@ See the [Basics](basics.md#get-the-code) documentation.
 ## Getting Started
 
 There is a bit of boilerplate code that needs to be set up when creating a new
-lint. Fortunately, you can use the clippy dev tools to handle this for you. We
+lint. Fortunately, you can use the Clippy dev tools to handle this for you. We
 are naming our new lint `foo_functions` (lints are generally written in snake
-case), and we don't need type information so it will have an early pass type
-(more on this later on). If you're not sure if the name you chose fits the lint,
-take a look at our [lint naming guidelines][lint_naming]. To get started on this
-lint you can run `cargo dev new_lint --name=foo_functions --pass=early
---category=pedantic` (category will default to nursery if not provided). This
-command will create two files: `tests/ui/foo_functions.rs` and
-`clippy_lints/src/foo_functions.rs`, as well as [registering the
-lint](#lint-registration). For cargo lints, two project hierarchies (fail/pass)
-will be created by default under `tests/ui-cargo`.
+case), and we don't need type information, so it will have an early pass type
+(more on this later). If you're unsure if the name you chose fits the lint,
+take a look at our [lint naming guidelines][lint_naming].
+
+## Defining Our Lint
+To get started, there are two ways to define our lint.
+
+### Standalone
+Command: `cargo dev new_lint --name=foo_functions --pass=early --category=pedantic`
+(category will default to nursery if not provided)
+
+This command will create a new file: `clippy_lints/src/foo_functions.rs`, as well
+as [register the lint](#lint-registration).
+
+### Specific Type
+Command: `cargo dev new_lint --name=foo_functions --type=functions --category=pedantic`
+
+This command will create a new file: `clippy_lints/src/{type}/foo_functions.rs`.
+
+Notice how this command has a `--type` flag instead of `--pass`. Unlike a standalone
+definition, this lint won't be registered in the traditional sense. Instead, you will
+call your lint from within the type's lint pass, found in `clippy_lints/src/{type}/mod.rs`.
+
+A "type" is just the name of a directory in `clippy_lints/src`, like `functions` in
+the example command. These are groupings of lints with common behaviors, so if your
+lint falls into one, it would be best to add it to that type.
+
+### Tests Location
+Both commands will create a file: `tests/ui/foo_functions.rs`. For cargo lints,
+two project hierarchies (fail/pass) will be created by default under `tests/ui-cargo`.
 
 Next, we'll open up these files and add our lint!
 

src/tools/clippy/book/src/development/infrastructure/book.md

@@ -25,7 +25,7 @@ instructions for other options.
 ## Make changes
 
 The book's
-[src](https://github.com/joshrotenberg/rust-clippy/tree/clippy_guide/book/src)
+[src](https://github.com/rust-lang/rust-clippy/tree/master/book/src)
 directory contains all of the markdown files used to generate the book. If you
 want to see your changes in real time, you can use the mdbook `serve` command to
 run a web server locally that will automatically update changes as they are

src/tools/clippy/clippy_dev/src/fmt.rs

@@ -13,7 +13,7 @@ pub enum CliError {
     IoError(io::Error),
     RustfmtNotInstalled,
     WalkDirError(walkdir::Error),
-    RaSetupActive,
+    IntellijSetupActive,
 }
 
 impl From<io::Error> for CliError {
@@ -48,7 +48,7 @@ pub fn run(check: bool, verbose: bool) {
             .expect("Failed to read clippy Cargo.toml")
             .contains(&"[target.'cfg(NOT_A_PLATFORM)'.dependencies]")
         {
-            return Err(CliError::RaSetupActive);
+            return Err(CliError::IntellijSetupActive);
         }
 
         rustfmt_test(context)?;
@@ -93,11 +93,11 @@ pub fn run(check: bool, verbose: bool) {
             CliError::WalkDirError(err) => {
                 eprintln!("error: {}", err);
             },
-            CliError::RaSetupActive => {
+            CliError::IntellijSetupActive => {
                 eprintln!(
                     "error: a local rustc repo is enabled as path dependency via `cargo dev setup intellij`.
 Not formatting because that would format the local repo as well!
-Please revert the changes to Cargo.tomls first."
+Please revert the changes to Cargo.tomls with `cargo dev remove intellij`."
                 );
             },
         }

src/tools/clippy/clippy_dev/src/main.rs

@@ -36,7 +36,8 @@ fn main() {
             match new_lint::create(
                 matches.get_one::<String>("pass"),
                 matches.get_one::<String>("name"),
-                matches.get_one::<String>("category"),
+                matches.get_one::<String>("category").map(String::as_str),
+                matches.get_one::<String>("type").map(String::as_str),
                 matches.contains_id("msrv"),
             ) {
                 Ok(_) => update_lints::update(update_lints::UpdateMode::Change),
@@ -157,7 +158,8 @@ fn get_clap_config() -> ArgMatches {
                         .help("Specify whether the lint runs during the early or late pass")
                         .takes_value(true)
                         .value_parser([PossibleValue::new("early"), PossibleValue::new("late")])
-                        .required(true),
+                        .conflicts_with("type")
+                        .required_unless_present("type"),
                     Arg::new("name")
                         .short('n')
                         .long("name")
@@ -183,6 +185,11 @@ fn get_clap_config() -> ArgMatches {
                             PossibleValue::new("internal_warn"),
                         ])
                         .takes_value(true),
+                    Arg::new("type")
+                        .long("type")
+                        .help("What directory the lint belongs in")
+                        .takes_value(true)
+                        .required(false),
                     Arg::new("msrv").long("msrv").help("Add MSRV config code to the lint"),
                 ]),
             Command::new("setup")