Gradle: multi-project dependency graph (supports depth > 2)

dependency-report.gradle

task moduleDependencyReport {
  doLast {
    def file = new File("project-dependencies.dot")
    file.delete()
    file << "digraph {\n"
    file << "splines=ortho\n"
    printDeps(file, rootProject)
    file << "}\n"
  }
}

// recursively print dependencies to file and move on to child projects
def printDeps(file, project) {
  project.configurations.each {
    it.dependencies
        .matching { it in ProjectDependency }
        .each { to -> file << ("\"${project.name}\" -> \"${to.name}\"\n") }
  }

  project.childProjects.each { child -> printDeps(file, child.value) }
}