What are .kotlin_builtins files and can I omit them from my uberjars?

Question

I\'m working on integrating proguard to my gradle build for an application written in Kotlin. I\'m finding that proguard is stripping out the Kotlin standard library (as it

Answer 1

You can optimize/omit these from yours JARs/APKs:

packagingOptions {
  exclude "/META-INF/*.kotlin_module"
  exclude "**/kotlin/**"
}

Even better:

packagingOptions {
  exclude "/META-INF/*.kotlin_module"
  exclude "**/kotlin/**"
  exclude "**/*.txt"
  exclude "**/*.xml"
  exclude "**/*.properties"
}

Source: https://github.com/jaredsburrows/android-gif-example/blob/master/build.gradle.kts#L127