build(gradle): Do not publish "funTest" feature variants

These are only needed locally. This speeds up publishing and works around
a bogus "Dependency version information is missing" error on Sonatype
Central Portal when publishing releases.

Note that the lookup in `components` throws instead of returning `null` if
"java" is not present.

Also see [1] which explains to do the same for test fixtures, which in
fact are just feature variants.

[1]: https://docs.gradle.org/current/userguide/java_testing.html#ex-disable-publishing-of-test-fixtures-variants

Signed-off-by: Sebastian Schuberth <[email protected]>

Author: sschuberth

buildSrc/src/main/kotlin/ort-publication-conventions.gradle.kts

@@ -24,6 +24,13 @@ plugins {
     id("com.vanniktech.maven.publish")
 }
 
+runCatching {
+    components["java"] as AdhocComponentWithVariants
+}.onSuccess {
+    it.withVariantsFromConfiguration(configurations["funTestApiElements"]) { skip() }
+    it.withVariantsFromConfiguration(configurations["funTestRuntimeElements"]) { skip() }
+}
+
 fun getGroupId(parent: Project?): String =
     parent?.let { "${getGroupId(it.parent)}.${it.name.replace("-", "")}" }.orEmpty()