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Iterate through the dependencies and check for it's type to be

ProjectDependency

iirc

https://docs.gradle.org/current/userguide/dependency_resolution.html#sec:programmatic_api something like this should be a start

tasks.register("printSubprojectDependencies") {
  group = "help"

  val subprojectNames = configurations.compileClasspath.map { conf ->
    conf
      .incoming
      .artifactView {
        componentFilter { it is ProjectComponentIdentifier }
      }.artifacts
      .artifacts
      .map { it.id.displayName }
  }

  inputs.property("subprojectNames", subprojectNames)

  doLast {
    logger.lifecycle(subprojectNames.get().joinToString())
  }
}

but that only logs incoming subproject dependencies. And it’s the compile-time only, but you can tweak it to also log the runtimeClasspath. If •

subproject-b

and

subproject-c

depend on

subproject-a

, • and you want a task inside

subproject-a

that prints “I’m used by subproject-b and subproject-c” , then that might be a little more difficult. Subprojects aren’t supposed to know how other subprojects are configured.