# GitHub Action: Run Clippy with reviewdog

This action runs [Clippy](https://github.com/rust-lang/rust-clippy) with
[reviewdog](https://github.com/reviewdog/reviewdog) on pull requests to improve code review experience.

## Example usage

```yml
name: clippy-action
on: [pull_request]
env:
  CARGO_TERM_COLOR: always
jobs:
  clippy:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v3
    - name: Install latest nightly
      uses: actions-rs/toolchain@v1
      with:
        toolchain: nightly
        override: true
        components: rustfmt, clippy
    - name: clippy-action
      uses: giraffate/clippy-action@main
      with:
        reporter: 'github-pr-review'
        github_token: ${{ secrets.GITHUB_TOKEN }}
```


## Inputs

### `github_token`

**Required**. Default is `${{ github.token }}`.

### `clippy_flags`

Optional. clippy flags. (cargo clippy --color never -q --message-format json `<clippy_flags>`)

### `tool_name`

Optional. Tool name to use for reviewdog reporter. Useful when running multiple actions with different config.

### `level`

Optional. Report level for reviewdog [info,warning,error].
It's same as `-level` flag of reviewdog.

### `workdir`

Optional. Working directory relative to the root directory.

### `reporter`

Optional. Reporter of reviewdog command [github-pr-check,github-pr-review].
It's same as `-reporter` flag of reviewdog.

### `filter_mode`

Optional. Filtering mode for the reviewdog command [added,diff_context,file,nofilter].
Default is added.

### `fail_on_error`

Optional. Exit code for reviewdog when errors are found [`true`, `false`]
Default is `false`.

### `reviewdog_flags`

Optional. Additional reviewdog flags

### `reviewdog_version`

Optional. Install a specific version of reviewdog.
By default, the latest version of reviewdog is installed.