Extract top-level task class

Author: marcphilipp

buildSrc/src/main/kotlin/org/junit/gradle/java/WriteArtifactsFile.kt

@@ -0,0 +1,36 @@
+package org.junit.gradle.java
+
+import org.gradle.api.DefaultTask
+import org.gradle.api.artifacts.Configuration
+import org.gradle.api.artifacts.ModuleVersionIdentifier
+import org.gradle.api.artifacts.ResolvedArtifact
+import org.gradle.api.file.RegularFileProperty
+import org.gradle.api.provider.Property
+import org.gradle.api.provider.Provider
+import org.gradle.api.provider.SetProperty
+import org.gradle.api.tasks.*
+
+abstract class WriteArtifactsFile : DefaultTask() {
+
+    @get:OutputFile
+    abstract val outputFile: RegularFileProperty
+
+    @get:Input
+    abstract val moduleVersions: SetProperty<ModuleVersionIdentifier>
+
+    fun from(configuration: Provider<Configuration>) {
+        moduleVersions.addAll(configuration.map {
+            it.resolvedConfiguration.resolvedArtifacts.map { it.moduleVersion.id }
+        })
+    }
+
+    @TaskAction
+    fun writeFile() {
+        outputFile.get().asFile.printWriter().use { out ->
+            moduleVersions.get()
+                .map { "${it.group}:${it.name}:${it.version}" }
+                .sorted()
+                .forEach(out::println)
+        }
+    }
+}

junit-platform-console-standalone/junit-platform-console-standalone.gradle.kts

@@ -1,3 +1,5 @@
+import org.junit.gradle.java.WriteArtifactsFile
+
 plugins {
 	`java-library-conventions`
 	`shadow-conventions`
@@ -26,19 +28,9 @@ tasks {
 			attributes("Main-Class" to "org.junit.platform.console.ConsoleLauncher")
 		}
 	}
-	val shadowedArtifactsFile by registering {
-		inputs.files(configurations.shadowed).withNormalizer(ClasspathNormalizer::class)
-		val outputFile = layout.buildDirectory.file("shadowed-artifacts")
-		outputs.file(outputFile)
-		doFirst {
-			outputFile.get().asFile.printWriter().use { out ->
-				configurations.shadowed.get().resolvedConfiguration.resolvedArtifacts
-					.map { it.moduleVersion.id }
-					.map { "${it.group}:${it.name}:${it.version}" }
-					.sorted()
-					.forEach(out::println)
-			}
-		}
+	val shadowedArtifactsFile by registering(WriteArtifactsFile::class) {
+		from(configurations.shadowed)
+		outputFile.set(layout.buildDirectory.file("shadowed-artifacts"))
 	}
 	shadowJar {
 		// https://github.com/junit-team/junit5/issues/2557