use-yarn

Force users to use yarn instead of npm.

📖 Read the docs!

If running npm install instead of yarn, the process will exit with error code 1 and print an error message.

Note: this will not work if installing specific packages like npm install my-package.

Note: this will not work if used with npm install --save-dev --ignore-scripts.

Note: Use with >= yarn@1 requires >= use-yarn@2.