A modern programming language that makes developers happier.

kotlinlang

*Questions:*
1. Is it OK  that I change all the `compile` to `implementation` (and `testCompile` to `testImplementation`)? Did I understand gradle output correctly with its deprecation warning?
2. What is the proper configuration to have library in B avaiable in A too? (if A is including B, and as we know from Gradle output, `compile` is deprecated)
3. Is there any place where I can read about currently supported configurations and what is the result of using them?

pawel.barszcz: it sounds like you want the `api` configuration

Would it be OK to have both `kotlin` and `java-library` applied?  Is that plugin doing something more w/o applying `implementation`/`api` configuration or is just providing such configs (in other words: would it affect build somehow even without `api` configuration being used?) And, as I understand, it would be OK to use that `java-library` in all child projects of my whole project. I mean in all modules like `persistence`, `domain`, `http-client` etc. and to not use it in my two “end-side” projects: `runner` (Spring Boot) and `integration-tests`.

especially this point looks not so nice: <https://docs.gradle.org/current/userguide/java_library_plugin.html#sec:java_library_known_issues_compat>

`kotlin` and `java-library` _should_ be good together (I haven't <http://verified.it|verified.it> deeply yet) The `java-library` plugin is pretty thin <https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/java/org/gradle/api/plugins/JavaLibraryPlugin.java>