Build: Add sources and javadocs to Kotlin Plugin publication

buildSrc/src/main/kotlin/CommonUtil.kt

@@ -10,10 +10,7 @@ import org.gradle.api.plugins.JavaPluginConvention
 import org.gradle.api.tasks.SourceSet
 import org.gradle.api.tasks.SourceSetContainer
 import org.gradle.api.tasks.SourceSetOutput
-import org.gradle.kotlin.dsl.creating
-import org.gradle.kotlin.dsl.extra
-import org.gradle.kotlin.dsl.registering
-import org.gradle.kotlin.dsl.the
+import org.gradle.kotlin.dsl.*
 import java.io.File
 import java.util.concurrent.Callable
 
@@ -70,3 +67,5 @@ fun Project.getBooleanProperty(name: String): Boolean? = this.findProperty(name)
 inline fun CopySourceSpec.from(crossinline filesProvider: () -> Any?): CopySourceSpec = from(Callable { filesProvider() })
 
 fun Project.javaPluginConvention(): JavaPluginConvention = the()
+
+fun Project.findJavaPluginConvention(): JavaPluginConvention? = convention.findByType() ?: convention.findPlugin()

buildSrc/src/main/kotlin/artifacts.kt

@@ -98,7 +98,12 @@ fun Project.sourcesJar(body: Jar.() -> Unit = {}): TaskProvider<Jar> {
                     .resolvedArtifacts
                     .map { it.id.componentIdentifier }
                     .filterIsInstance<ProjectComponentIdentifier>()
-                    .map { project(it.projectPath).mainSourceSet.allSource }
+                    .mapNotNull {
+                        project(it.projectPath)
+                            .findJavaPluginConvention()
+                            ?.mainSourceSet
+                            ?.allSource
+                    }
             })
         }
 

buildSrc/src/main/kotlin/sourceSets.kt

@@ -1,4 +1,5 @@
 import org.gradle.api.Project
+import org.gradle.api.plugins.JavaPluginConvention
 import org.gradle.api.tasks.SourceSet
 import org.gradle.api.tasks.SourceSetContainer
 
@@ -37,7 +38,13 @@ val Project.sourceSets: SourceSetContainer
     get() = javaPluginConvention().sourceSets
 
 val Project.mainSourceSet: SourceSet
-    get() = sourceSets.getByName("main")
+    get() = javaPluginConvention().mainSourceSet
 
 val Project.testSourceSet: SourceSet
+    get() = javaPluginConvention().testSourceSet
+
+val JavaPluginConvention.mainSourceSet: SourceSet
+    get() = sourceSets.getByName("main")
+
+val JavaPluginConvention.testSourceSet: SourceSet
     get() = sourceSets.getByName("test")