has-yarn

Check if a project is using Yarn

Useful for tools that needs to know whether to use yarn or npm to install dependencies.

Install

$ npm install --save has-yarn

.
├── foo
│   └── package.json
└── bar
    ├── package.json
    └── yarn.lock

const hasYarn = require('has-yarn');

hasYarn('foo');
//=> false

hasYarn('bar');
//=> true

Returns a boolean.

Type: string
Default: process.cwd()

Current working directory.