This exposes the NSProcessInfo environment to React Native.
I use this to grab environment variables passed-in from XCode UI Tests, so my project can tell when it's running as a UI Test.
import ProcessInfo from 'react-native-processinfo';
ProcessInfo.environment.HOME
ProcessInfo.environment.SIMULATOR_DEVICE_NAME
Install the package:
$ npm install react-native-processinfo --save
$ rnpm link react-native-processinfo