# yaml-eslint-parser

A YAML parser that produces output [compatible with ESLint](https://eslint.org/docs/developer-guide/working-with-custom-parsers#all-nodes).

*This parser is backed by excellent [yaml](https://github.com/eemeli/yaml) package and it is heavily inspired by [yaml-unist-parser](https://github.com/ikatyang/yaml-unist-parser) package.*

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## Installation

```bash
npm install --save-dev yaml-eslint-parser
```

## Usage

### Configuration

Use `.eslintrc.*` file to configure parser. See also: [https://eslint.org/docs/user-guide/configuring](https://eslint.org/docs/user-guide/configuring).

Example **.eslintrc.js**:

```js
module.exports = {
    "overrides": [
        {
            "files": ["*.yaml", "*.yml"],
            "parser": "yaml-eslint-parser"
        }
    ]
}
```

## Usage for Custom Rules / Plugins

- [AST.md](./docs/AST.md) is AST specification.
- [block-mapping.ts](https://github.com/ota-meshi/eslint-plugin-yml/blob/master/src/rules/block-mapping.ts) is an example.
- You can see the AST on the [Online DEMO](https://ota-meshi.github.io/yaml-eslint-parser/).