It would be great if android library plugin would inter-op with Gradle maven-publish plugin and publish sources along side of aars. Gradle Java plugin has: java { withSourcesJar() }

https://docs.gradle.org/current/dsl/org.gradle.api.plugins.JavaPluginExtension.html#org.gradle.api.plugins.JavaPluginExtension:withSourcesJar()

Today androidx build do some hardcoding of "main" sourceset name, it would be great if we did not have to do that. https://android.googlesource.com/platform/frameworks/support/+/androidx-master-dev/buildSrc/src/main/kotlin/androidx/build/SourceJarTaskHelper.kt#36