FR: Ban platform() dependencies if java-base was not applied

[dansanduleac]

What happened?

People regularly import boms into all projects like so:

allprojects {
  dependencies {
    rootConfiguration platform('org:my-bom')
  }
}

But this doesn't actually behave as expected unless each project has java-base applied. This is because java-base adds some magic that handles these platform() dependencies in a special way.

This then has the side effect that certain configurations that expect exactly oen artifact (e.g. gradle-conjure's tool configurations - conjureJava etc) end up broken, if the BOM in question also has a non-empty <dependencies> block, because the dependency ends up interpreted as a plain library dependency.

What did you want to happen?

Either

• users should get an error if they add platform() dependencies to projects that do not apply java-base, or
• GCV should instrument all repos to handle platform() dependencies in some way that makes sense for non-java repos, e.g. by ignoring them