Separate sonar project for a gradle subproject

Question

I have a project with the following structure in gradle (root, childA and childB are modules each with their own build.gradle)

• root
  • childA
  • childB

I have a sonar analysis setup such that it analyzes the whole project into a project root-analysis on sonarqube.

With the childA submodule growing bigger, I wish to transfer its analysis into a separate sonarqube project a-analysis and remove it from the root-analysis. Is there a way to do so?

What I've tried

• Calling :root:childA:sonarqube doesn't work as it says task sonarqube not found in gradle.
• Adding sonar.projectKey property(with value a-analysis) to the child sonarqube settings block hoping it would send its analysis to another sonarqube project. Doesn't work.
• trying to register the sonar plugin in the child gives an error, the plugin has already been registered.

I'm currently using sonar-gradle plugin 2.6.2, and it'd be great if I didn't have to update that.

THanks!