mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-11-30 16:39:26 +00:00
106 lines
3.3 KiB
Markdown
106 lines
3.3 KiB
Markdown
## `cargo lintcheck`
|
|
|
|
Runs Clippy on a fixed set of crates read from
|
|
`lintcheck/lintcheck_crates.toml` and saves logs of the lint warnings into the
|
|
repo. We can then check the diff and spot new or disappearing warnings.
|
|
|
|
From the repo root, run:
|
|
|
|
```
|
|
cargo run --target-dir lintcheck/target --manifest-path lintcheck/Cargo.toml
|
|
```
|
|
|
|
or
|
|
|
|
```
|
|
cargo lintcheck
|
|
```
|
|
|
|
By default, the logs will be saved into
|
|
`lintcheck-logs/lintcheck_crates_logs.txt`.
|
|
|
|
You can set a custom sources.toml by adding `--crates-toml custom.toml` or using
|
|
`LINTCHECK_TOML="custom.toml"` where `custom.toml` must be a relative path from
|
|
the repo root.
|
|
|
|
The results will then be saved to `lintcheck-logs/custom_logs.toml`.
|
|
|
|
The `custom.toml` file may be built using <https://crates.io> recently most
|
|
downloaded crates by using `cargo lintcheck popular`. For example, to retrieve
|
|
the 200 recently most downloaded crates:
|
|
|
|
```
|
|
cargo lintcheck popular -n 200 custom.toml
|
|
```
|
|
|
|
|
|
### Configuring the Crate Sources
|
|
|
|
The sources to check are saved in a `toml` file. There are three types of
|
|
sources.
|
|
|
|
1. Crates-io Source
|
|
|
|
```toml
|
|
bitflags = {name = "bitflags", versions = ['1.2.1']}
|
|
```
|
|
Requires a "name" and one or multiple "versions" to be checked.
|
|
|
|
2. `git` Source
|
|
````toml
|
|
puffin = {name = "puffin", git_url = "https://github.com/EmbarkStudios/puffin", git_hash = "02dd4a3"}
|
|
````
|
|
Requires a name, the url to the repo and unique identifier of a commit,
|
|
branch or tag which is checked out before linting. There is no way to always
|
|
check `HEAD` because that would lead to changing lint-results as the repo
|
|
would get updated. If `git_url` or `git_hash` is missing, an error will be
|
|
thrown.
|
|
|
|
3. Local Dependency
|
|
```toml
|
|
clippy = {name = "clippy", path = "/home/user/clippy"}
|
|
```
|
|
For when you want to add a repository that is not published yet.
|
|
|
|
#### Command Line Options (optional)
|
|
|
|
```toml
|
|
bitflags = {name = "bitflags", versions = ['1.2.1'], options = ['-Wclippy::pedantic', '-Wclippy::cargo']}
|
|
```
|
|
|
|
It is possible to specify command line options for each crate. This makes it
|
|
possible to only check a crate for certain lint groups. If no options are
|
|
specified, the lint groups `clippy::all`, `clippy::pedantic`, and
|
|
`clippy::cargo` are checked. If an empty array is specified only `clippy::all`
|
|
is checked.
|
|
|
|
**Note:** `-Wclippy::all` is always enabled by default, unless `-Aclippy::all`
|
|
is explicitly specified in the options.
|
|
|
|
### Fix mode
|
|
You can run `cargo lintcheck --fix` which will run Clippy with `--fix` and
|
|
print a warning if Clippy's suggestions fail to apply (if the resulting code does not build).
|
|
This lets us spot bad suggestions or false positives automatically in some cases.
|
|
|
|
> Note: Fix mode implies `--all-targets`, so it can fix as much code as it can.
|
|
|
|
Please note that the target dir should be cleaned afterwards since Clippy will modify
|
|
the downloaded sources which can lead to unexpected results when running lintcheck again afterwards.
|
|
|
|
### Recursive mode
|
|
You can run `cargo lintcheck --recursive` to also run Clippy on the dependencies
|
|
of the crates listed in the crates source `.toml`. e.g. adding `rand 0.8.5`
|
|
would also lint `rand_core`, `rand_chacha`, etc.
|
|
|
|
Particularly slow crates in the dependency graph can be ignored using
|
|
`recursive.ignore`:
|
|
|
|
```toml
|
|
[crates]
|
|
cargo = {name = "cargo", versions = ['0.64.0']}
|
|
|
|
[recursive]
|
|
ignore = [
|
|
"unicode-normalization",
|
|
]
|
|
```
|