Check if a project is using Yarn
Useful for tools that needs to know whether to use yarn or npm to install dependencies.
It checks for a yarn.lock file in the given directory or any of its parent directories (useful for Yarn workspaces).
npm install has-yarn.
├── foo
│ └── package.json
└── bar
├── package.json
└── yarn.lock
import hasYarn from 'has-yarn';
hasYarn('foo');
//=> false
hasYarn('bar');
//=> true
// In a Yarn workspace
hasYarn('bar/packages/some-package');
//=> trueReturns a boolean of whether the project uses Yarn.
Type: string
Default: process.cwd()
The directory to check. The search also walks up parent directories until the filesystem root.
- has-yarn-cli - CLI for this package
