readme: remove paragraph about installing clippy manually on ci, if it is missing on a nightly

Clippy should always be available on nightly because we are gating on it in rustcs CI.
This commit is contained in:
Matthias Krüger 2020-12-21 16:11:40 +01:00
parent 4911ab124c
commit 19ace28af4

View file

@ -10,16 +10,16 @@ A collection of lints to catch common mistakes and improve your [Rust](https://g
Lints are divided into categories, each with a default [lint level](https://doc.rust-lang.org/rustc/lints/levels.html).
You can choose how much Clippy is supposed to ~~annoy~~ help you by changing the lint level by category.
Category | Description | Default level
-- | -- | --
`clippy::all` | all lints that are on by default (correctness, style, complexity, perf) | **warn/deny**
`clippy::correctness` | code that is outright wrong or very useless | **deny**
`clippy::style` | code that should be written in a more idiomatic way | **warn**
`clippy::complexity` | code that does something simple but in a complex way | **warn**
`clippy::perf` | code that can be written to run faster | **warn**
`clippy::pedantic` | lints which are rather strict or might have false positives | allow
`clippy::nursery` | new lints that are still under development | allow
`clippy::cargo` | lints for the cargo manifest | allow
| Category | Description | Default level |
| --------------------- | ----------------------------------------------------------------------- | ------------- |
| `clippy::all` | all lints that are on by default (correctness, style, complexity, perf) | **warn/deny** |
| `clippy::correctness` | code that is outright wrong or very useless | **deny** |
| `clippy::style` | code that should be written in a more idiomatic way | **warn** |
| `clippy::complexity` | code that does something simple but in a complex way | **warn** |
| `clippy::perf` | code that can be written to run faster | **warn** |
| `clippy::pedantic` | lints which are rather strict or might have false positives | allow |
| `clippy::nursery` | new lints that are still under development | allow |
| `clippy::cargo` | lints for the cargo manifest | allow |
More to come, please [file an issue](https://github.com/rust-lang/rust-clippy/issues) if you have ideas!
@ -130,18 +130,6 @@ script:
# etc.
```
If you are on nightly, It might happen that Clippy is not available for a certain nightly release.
In this case you can try to conditionally install Clippy from the Git repo.
```yaml
language: rust
rust:
- nightly
before_script:
- rustup component add clippy --toolchain=nightly || cargo install --git https://github.com/rust-lang/rust-clippy/ --force clippy
# etc.
```
Note that adding `-D warnings` will cause your build to fail if **any** warnings are found in your code.
That includes warnings found by rustc (e.g. `dead_code`, etc.). If you want to avoid this and only cause
an error for Clippy warnings, use `#![deny(clippy::all)]` in your code or `-D clippy::all` on the command