Switch from detached to named configurations in plugin-gradle (#848, …

…shallow fix for #815)

plugin-gradle/CHANGES.md

@@ -3,6 +3,8 @@
 We adhere to the [keepachangelog](https://keepachangelog.com/en/1.0.0/) format (starting after version `3.27.0`).
 
 ## [Unreleased]
+### Fixed
+* Dependency configurations are now named rather than detached, attempt to fix #815.
 
 ## [5.12.3] - 2021-04-21
 ### Fixed

plugin-gradle/src/main/java/com/diffplug/gradle/spotless/GradleProvisioner.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2020 DiffPlug
+ * Copyright 2016-2021 DiffPlug
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -26,7 +26,6 @@
 
 import org.gradle.api.Project;
 import org.gradle.api.artifacts.Configuration;
-import org.gradle.api.artifacts.Dependency;
 
 import com.diffplug.common.base.Preconditions;
 import com.diffplug.common.collect.ImmutableList;
@@ -64,11 +63,11 @@ static Provisioner fromRootBuildscript(Project project) {
 		Objects.requireNonNull(project);
 		return (withTransitives, mavenCoords) -> {
 			try {
-				Dependency[] deps = mavenCoords.stream()
+				Configuration config = project.getRootProject().getBuildscript().getConfigurations().create("spotless"
+						+ new Request(withTransitives, mavenCoords).hashCode());
+				mavenCoords.stream()
 						.map(project.getBuildscript().getDependencies()::create)
-						.toArray(Dependency[]::new);
-
-				Configuration config = project.getRootProject().getBuildscript().getConfigurations().detachedConfiguration(deps);
+						.forEach(config.getDependencies()::add);
 				config.setDescription(mavenCoords.toString());
 				config.setTransitive(withTransitives);
 				return config.resolve();