Build and publish test classes with gradle.kts - gradle

Question

We have a multiproject gradle repository with several subprojects. One of the subprojects is supposed to generate separate testJar and publish it to the local maven repository:
// build a repositories-testJar.jar with test classes for services tests
tasks.register<Jar>("testJar") {
archiveClassifier.set("testJar")
from(sourceSets["test"].output)
}
// the testJar must be built within the build phase
tasks.build {
dependsOn(tasks.withType<Jar>())
}
// needed for publishing plugin to be aware of the testJar
configurations.create("testJar") {
extendsFrom(configurations["testCompile"])
}
artifacts {
add("testJar", tasks.named<Jar>("testJar"))
}
This works and I can see -testJar.jar is generated within the /build/libs.
Then, within the rootProject gradle.kts we set up a publishing extension:
allprojects {
configure<PublishingExtension> {
publications {
create<MavenPublication>(project.name) {
groupId = "foo.bar"
artifactId = project.name.toLowerCase().replace(":", "-")
version = "ci"
from(components["kotlin"])
}
}
repositories {
maven {
url = uri("file://${rootProject.rootDir}/../m2")
}
}
}
}
This also normally works and I can see modules being published in the m2 directory. However the testJar is not published. I couldn't find a way how to attach the testJar artifact to the publication defined in root project.

Answer 1

Solved with addition of:
publishing {
publications {
create<MavenPublication>(project.name + "-" + testArtifact.name) {
groupId = "my.group"
artifactId = project.name.toLowerCase().replace(":", "-")
version = "version"
artifact(testArtifact)
}
}
}