Multimodule: docker:publish error in virtual root

[alaz]

I have a multimodule project in SBT where root project is a virtual project to aggregate both subprojects. It looks similar to this code:

lazy val root = (project in file("."))
  .aggregate(web, backend)
  .settings(
    publishArtifact := false
  )

lazy val web = project
  .enablePlugins(PlayScala, BuildInfoPlugin, DockerPlugin)

lazy val backend = project
  .enablePlugins(BuildInfoPlugin, JavaServerAppPackaging, DockerPlugin)

The subprojects generate own Docker containers and this works perfectly. When I call docker:publishLocal, the whole build succeeds. But I experience the problem when calling docker:publish. Both subprojects get pushed, but I still get the error from "root" project:

[trace] Stack trace suppressed: run last root/*:publishConfiguration for the full output.
[error] (root/*:publishConfiguration) Repository for publishing is not specified.

Is there a way to get rid of this false error?

[muuki88]

Thanks for your detailed description. You need to disable the publish in Docker task for your root project.

lazy val root = (project in file("."))
  .aggregate(web, backend)
  .settings(
    publish in Docker := {}, // something like this
    publishArtifact := false
  )

This way root/docker:publish won't be executed.

[alaz]

Thank you