I want to hugo in release because some libarary need to test on release version.

[kaneoriley]

You should just need to apply any Aspect J plugin on release builds (theres a few around if you google it, like https://github.com/uPhyca/gradle-android-aspectj-plugin) and add the inner Hugo dependencies manually instead of using the plugin, like so:

dependencies {
      compile 'com.jakewharton.hugo:hugo-runtime:1.2.1'
      compile 'com.jakewharton.hugo:hugo-annotations:1.2.1'
}

Edit: This seems like a bad idea though, I can understand why it's not possible or explained in the README