How can I upload proguardMapping or not depending on build settings?

[dant3]

Hi. I have many different build flavors, some of them use obfuscation and collect mapping, some of them does not. How can I setup such a configuration with this plugin? Is it possible to always look for mapping and just do not upload it if it does not exists? It's hard to keep proguard config and build script in sync because of that, esp, given that proguard config differs from flavor to flavor