cordova-cli 4.3.0
android-platform 3.7.1
When you do
cordova plugin add https://github.com/EddyVerbruggen/LaunchMyApp-PhoneGap-Plugin.git --variable URL_SCHEME=mycoolapp --save
It for some reason saves URL_SCHEME as <param name="URL_SCHEME" value="slingshotapp" />
And later if you try to update or add a platform you'll get an error like this:
Error: Variable(s) missing: URL_SCHEME
The URL_SCHEME variable should be saved as variable, not as param, here's an example:
<feature name="Custom URL scheme">
<param name="id" value="nl.x-services.plugins.launchmyapp" />
<param name="url" value="https://github.com/EddyVerbruggen/LaunchMyApp-PhoneGap-Plugin.git" />
<variable name="URL_SCHEME" value="mycoolapp" />
</feature>
I think it is something worth to document in README