Martin Konicek 94711bfb06 Use yarn when available ... Summary: **Motivation** `react-native init` takes minutes even on a fast network. Yarn makes it much quicker. When yarn is not installed on the system: <img width="440" alt="screenshot 2016-10-31 22 21 19" src="https://cloud.githubusercontent.com/assets/346214/19873897/7bad5662-9fb9-11e6-85fb-ad4879949dad.png"> When yarn is installed: <img width="441" alt="screenshot 2016-10-31 22 02 20" src="https://cloud.githubusercontent.com/assets/346214/19873898/7baf4c56-9fb9-11e6-96b3-007f93d2438a.png"> Also added the option `react-native init AwesomeApp --npm` as a fallback in case yarn is not stable enough for some people (I saw some Github issues that yarn hangs for example; for me it works great though). **Test plan** 1. Publish to Sinopia: https://github.com/facebook/react-native/tree/master/react-native-cli 2. `react-native init AwesomeApp` ***Tested the following setups*** - New CLI - uses yarn, new react-native - uses yarn - Old CLI (1.0.0) - doesn't use yarn, new react-native - uses yarn - Closes https://github.com/facebook/react-native/pull/10626 Differential Revision: D4110883 Pulled By: bestander fbshipit-source-id: 8a3427e2bc9158cf5fadd8ddf5b31e4b50ce6453		2016-11-01 09:28:52 -07:00
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templates	Adding jest and jest babel preset to the react-native init command	2016-09-09 17:43:42 -07:00
index.js	Use yarn when available	2016-11-01 09:28:52 -07:00