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README: document that Clippy may change codegen #8037

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Jan 12, 2022
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README: document that Clippy may change codegen #8037

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`README`: `clippy-driver` is not a replacement for `rustc`
ojeda Nov 27, 2021
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`README`: mention `clippy-driver` on usage list
ojeda Dec 14, 2021
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20 changes: 8 additions & 12 deletions README.md
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Expand Up @@ -37,8 +37,8 @@ Table of contents:

## Usage

Below are instructions on how to use Clippy as a subcommand, compiled from source
or in Travis CI.
Below are instructions on how to use Clippy as a cargo subcommand,
in projects that do not use cargo, or in Travis CI.

### As a cargo subcommand (`cargo clippy`)

Expand Down Expand Up @@ -98,22 +98,18 @@ If you want to run Clippy **only** on the given crate, use the `--no-deps` optio
cargo clippy -p example -- --no-deps
```

### As a rustc replacement (`clippy-driver`)
### Using `clippy-driver`

Clippy can also be used in projects that do not use cargo. To do so, you will need to replace
your `rustc` compilation commands with `clippy-driver`. For example, if your project runs:

```terminal
rustc --edition 2018 -Cpanic=abort foo.rs
```

Then, to enable Clippy, you will need to call:
Clippy can also be used in projects that do not use cargo. To do so, run `clippy-driver`
with the same arguments you use for `rustc`. For example:

```terminal
clippy-driver --edition 2018 -Cpanic=abort foo.rs
```

Note that `rustc` will still run, i.e. it will still emit the output files it normally does.
Note that `clippy-driver` is designed for running Clippy only and should not be used as a general
replacement for `rustc`. `clippy-driver` may produce artifacts that are not optimized as expected,
for example.

### Travis CI

Expand Down