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Clean up Allowing/Denying Lints section

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Philipp Krones 2024-02-26 16:43:05 +01:00
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book/src/configuration.md
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@ -33,26 +33,29 @@ disallowed-names = ["bar", ".."] # -> ["bar", "foo", "baz", "quux"]
To deactivate the "for further information visit *lint-link*" message you can define the `CLIPPY_DISABLE_DOCS_LINKS`
environment variable.
### Allowing/denying lints
### Allowing/Denying Lints
You can add options to your code to `allow`/`warn`/`deny` Clippy lints:
#### Attributes in Code
* the whole set of `Warn` lints using the `clippy` lint group (`#![deny(clippy::all)]`)
You can add attributes to your code to `allow`/`warn`/`deny` Clippy lints:
* all lints using both the `clippy` and `clippy::pedantic` lint groups (`#![deny(clippy::all)]`,
`#![deny(clippy::pedantic)]`). Note that `clippy::pedantic` contains some very aggressive lints prone to false
positives.
* the whole set of `warn`-by-default lints using the `clippy` lint group (`#![allow(clippy::all)]`)
* all lints using both the `clippy` and `clippy::pedantic` lint groups (`#![warn(clippy::all, clippy::pedantic)]`. Note
that `clippy::pedantic` contains some very aggressive lints prone to false positives.
* only some lints (`#![deny(clippy::single_match, clippy::box_vec)]`, etc.)
* `allow`/`warn`/`deny` can be limited to a single function or module using `#[allow(...)]`, etc.
Note: `allow` means to suppress the lint for your code. With `warn` the lint will only emit a warning, while with `deny`
the lint will emit an error, when triggering for your code. An error causes clippy to exit with an error code, so is
useful in scripts like CI/CD.
the lint will emit an error, when triggering for your code. An error causes Clippy to exit with an error code, so is
most useful in scripts used in CI/CD.
If you do not want to include your lint levels in your code, you can globally enable/disable lints by passing extra
flags to Clippy during the run:
#### Command Line Flags
If you do not want to include your lint levels in the code, you can globally enable/disable lints by passing extra flags
to Clippy during the run:
To allow `lint_name`, run
@ -66,28 +69,33 @@ And to warn on `lint_name`, run
cargo clippy -- -W clippy::lint_name
```
This also works with lint groups. For example, you can run Clippy with warnings for all lints enabled:
This also works with lint groups. For example, you can run Clippy with warnings for all pedantic lints enabled:
```terminal
cargo clippy -- -W clippy::pedantic
```
If you care only about a single lint, you can allow all others and then explicitly warn on the lint(s) you are
If you care only about a certain lints, you can allow all others and then explicitly warn on the lints you are
interested in:
```terminal
cargo clippy -- -A clippy::all -W clippy::useless_format -W clippy::...
```
The last way to allow/disallow lints is to use `Cargo.toml` using [the lints section](https://doc.rust-lang.org/nightly/cargo/reference/manifest.html#the-lints-section)):
#### Lints Section in `Cargo.toml`
To deny `clippy::enum_glob_use`
Finally, lints can be allowed/denied using [the lints
section](https://doc.rust-lang.org/nightly/cargo/reference/manifest.html#the-lints-section)) in the `Cargo.toml` file:
To deny `clippy::enum_glob_use`, put the following in the `Cargo.toml`:
```toml
[lints.clippy]
enum_glob_use = "deny"
```
For more details and options, refer to the Cargo documentation.
### Specifying the minimum supported Rust version
Projects that intend to support old versions of Rust can disable lints pertaining to newer features by specifying the