Fix: Maven Central upload

plugin/build.gradle

@@ -1,3 +1,7 @@
+import com.vanniktech.maven.publish.GradlePlugin
+import com.vanniktech.maven.publish.JavadocJar
+import com.vanniktech.maven.publish.SonatypeHost
+
 plugins {
  // Core Gradle plugins
  id "java-gradle-plugin"
@@ -34,11 +38,15 @@ jacocoTestReport {
  }
 }
 
-plugins.withId("com.vanniktech.maven.publish") {
- mavenPublishing {
- publishToMavenCentral("S01")
- signAllPublications()
- }
+mavenPublishing {
+ // Override default configuration: by default `com.vanniktech.maven.publish` uses
+ // `new GradlePublishPlugin()` because it detects that we use `com.gradle.plugin-publish`.
+ // However since we also publish to Maven Central the default publication created by
+ // `com.gradle.plugin-publish` is not suitable (Maven Central publication requires sources
+ // and Javadoc).
+ configure(new GradlePlugin(new JavadocJar.Dokka("dokkaHtml")))
+ publishToMavenCentral(SonatypeHost.S01)
+ signAllPublications()
 }
 
 gradlePlugin {