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copilot/packages/pseudo-yaml-ast/README.md
2017-05-31 22:35:35 +01:00

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# pseudo-yaml-ast
[![License: MPL 2.0](https://img.shields.io/badge/License-MPL%202.0-brightgreen.svg)](https://opensource.org/licenses/MPL-2.0)
[![npm](https://img.shields.io/npm/v/pseudo-yaml-ast.svg)](https://npmjs.com/package/pseudo-yaml-ast)
[![standard-readme compliant](https://img.shields.io/badge/standard--readme-OK-green.svg)](https://github.com/RichardLitt/standard-readme)
Parse a YAML string into an object with location properties.
## Table of Contents
- [Install](#install)
- [Usage](#usage)
- [License](#license)
## Install
```
yarn add --dev pseudo-yaml-ast
```
## Usage
```js
import yamlAST, { loc } from 'pseudo-yaml-ast';
import assert from 'assert';
const ast = yamlAST(`
obj:
arr:
- nums:
- 1
- 2
- 3
strs1:
- '1'
- '2'
- '3'
str: '1'
num: 1
`);
assert.deepEqual(Object.keys(ast), ['obj']);
assert.deepEqual(ast[loc].start.line, 2);
assert.deepEqual(ast[loc].end.line, 14);
assert.deepEqual(Object.keys(ast.obj), ['arr', 'str', 'num']);
assert.deepEqual(ast.obj[loc].start.line, 2);
assert.deepEqual(ast.obj[loc].end.line, 13);
assert.deepEqual(ast.obj.str[loc].start.line, 12);
assert.deepEqual(ast.obj.str[loc].end.line, 12);
assert.deepEqual(ast.obj.num[loc].start.line, 13);
assert.deepEqual(ast.obj.num[loc].end.line, 13);
assert.deepEqual(ast.obj.arr[0][loc].start.line, 4);
assert.deepEqual(ast.obj.arr[0][loc].end.line, 12);
assert.deepEqual(Object.keys(ast.obj.arr[0]), ['nums', 'strs1']);
assert.deepEqual(ast.obj.arr[0].nums[loc].start.line, 4);
assert.deepEqual(ast.obj.arr[0].nums[loc].end.line, 8);
assert.deepEqual(ast.obj.arr[0].strs1[loc].start.line, 8);
assert.deepEqual(ast.obj.arr[0].strs1[loc].end.line, 12);
```
## License
MPL-2.0