Cordova: How to lock app orientation at boot to landscape and not landscape-reverse?

I'm building a tilt-based game and want to lock the orientation to 1 particular landscape orientation (UIInterfaceOrientationLandscapeRight on iOS). However, if you set the cordova Orientation preference to landscape, it can still rotate 180 degrees to either landscape mode, which isn't acceptable for me. Is this a shortcoming of cordova? I need this, and it's trivial to do natively, so seems like there ought be an easy way to do it.

I'm aware of cordova-plugin-screen-orientation, but it only does stuff once your javascript has started running, which is too late for your splash screen.

Found a solution: cordova allows you to edit native attributes through your config.xml file. I feel this ought to be supported natively by cordova itself, but this will work:

<platform name="android">
    <edit-config 
                 file="AndroidManifest.xml"
                 target="/manifest/application/activity[@android:name='MainActivity']"
                 mode="merge"
                 xmlns:android="http://schemas.android.com/apk/res/android">
        <activity android:screenOrientation="landscape"></activity>
    </edit-config>
</platform>