Discovered plugin "onesignal-cordova-plugin" in config.xml. Adding it to the project
Installing "onesignal-cordova-plugin" for ios

Failed to install 'onesignal-cordova-plugin': undefined

Failed to restore plugin "onesignal-cordova-plugin" from config.xml. You might need to try adding it again. Error: rbenv: pod: command not found

The `pod' command exists in these Ruby versions:
  2.1.2

<?xml version='1.0' encoding='utf-8'?>
<widget id="com.app.app" version="0.0.1" xmlns="http://www.w3.org/ns/widgets" xmlns:cdv="http://cordova.apache.org/ns/1.0">
...
    <plugin name="cordova-plugin-network-information" spec="^1.3.4" />
    <plugin name="onesignal-cordova-plugin" spec="^2.2.5" />
    <engine name="ios" spec="~4.5.4" />
</widget>