Add harness to allow smooth transition for 5.x

.circleci/config.yml

@@ -92,6 +92,17 @@ jobs:
           command: ./gradlew :plugin-maven:check --build-cache
       - store_test_results:
           path: plugin-maven/build/test-results/test
+  test_gradle_modern_8:
+    << : *env_gradle
+    steps:
+      - checkout
+      - *restore_cache_wrapper
+      - *restore_cache_deps
+      - run:
+          name: gradlew :plugin-gradle:modernTest
+          command: ./gradlew :plugin-gradle:modernTest --build-cache
+      - store_test_results:
+          path: plugin-gradle/build/test-results/modernTest
   test_npm_8:
     << : *env_gradle
     docker:
@@ -128,8 +139,8 @@ jobs:
       # do the test
       - restore_cache:
           keys:
-          - gradle-deps-win-{{ checksum "build.gradle" }}-{{ checksum "gradle.properties" }}
-          - gradle-deps-win-
+          - gradle-deps-win2-{{ checksum "build.gradle" }}-{{ checksum "gradle.properties" }}
+          - gradle-deps-win2-
       - run:
           name: gradlew check
           command: gradlew check --build-cache
@@ -142,12 +153,12 @@ jobs:
       - store_test_results:
           path: plugin-maven/build/test-results/test
       - save_cache:
+          key: gradle-deps-win2-{{ checksum "build.gradle" }}-{{ checksum "gradle.properties" }}
           paths:
             - ~/.gradle/caches
             - ~/.gradle/wrapper
             - ~/.m2
             - ~/project/plugin-maven/build/localMavenRepository
-          key: gradle-deps-win-{{ checksum "build.gradle" }}-{{ checksum "gradle.properties" }}
   changelog_print:
     << : *env_gradle
     steps:
@@ -215,7 +226,10 @@ workflows:
       - test_npm_8:
           requires:
             - assemble_testClasses
-  deploy:
+      - test_gradle_modern_8:
+          requires:
+            - assemble_testClasses
+deploy:
     jobs:
       - changelog_print:
           filters:

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]
+### Added
+* (spotless devs only) if you specify `-PspotlessModern=true` Spotless will run the in-progress Gradle `5.4+` code.  The `modernTest` build task runs our test suite in this way.  It will be weeks/months before this is recommended for end-users. ([#598](https://github.com/diffplug/spotless/pull/598))
 
 ## [4.2.1] - 2020-06-04
 ### Fixed

plugin-gradle/build.gradle

@@ -41,6 +41,13 @@ task npmTest(type: Test) {
 	}
 }
 
+task modernTest(type: Test) {
+	systemProperty 'spotlessModern', 'true'
+	useJUnit {
+		excludeCategories 'com.diffplug.spotless.category.NpmTest', 'com.diffplug.gradle.spotless.ExcludeFromPluginGradleModern'
+	}
+}
+
 // make it easy for eclipse to run against latest build
 tasks.eclipse.dependsOn(pluginUnderTestMetadata)
 

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

@@ -26,7 +26,7 @@
 public class CppExtension extends FormatExtension implements HasBuiltinDelimiterForLicense {
 	static final String NAME = "cpp";
 
-	public CppExtension(SpotlessExtension spotless) {
+	public CppExtension(SpotlessExtensionBase spotless) {
 		super(spotless);
 	}
 

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

@@ -30,7 +30,7 @@
 public class CssExtension extends FormatExtension implements HasBuiltinDelimiterForLicense {
 	static final String NAME = "css";
 
-	public CssExtension(SpotlessExtension spotless) {
+	public CssExtension(SpotlessExtensionBase spotless) {
 		super(spotless);
 	}
 

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

@@ -55,9 +55,9 @@
 
 /** Adds a `spotless{Name}Check` and `spotless{Name}Apply` task. */
 public class FormatExtension {
-	final SpotlessExtension spotless;
+	final SpotlessExtensionBase spotless;
 
-	public FormatExtension(SpotlessExtension spotless) {
+	public FormatExtension(SpotlessExtensionBase spotless) {
 		this.spotless = Objects.requireNonNull(spotless);
 	}
 

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

@@ -33,7 +33,7 @@ public class FreshMarkExtension extends FormatExtension {
 
 	public final List<Action<Map<String, Object>>> propertyActions = new ArrayList<>();
 
-	public FreshMarkExtension(SpotlessExtension spotless) {
+	public FreshMarkExtension(SpotlessExtensionBase spotless) {
 		super(spotless);
 		addStep(FreshMarkStep.create(() -> {
 			Map<String, Object> map = new HashMap<>();

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

@@ -32,14 +32,15 @@
 import com.diffplug.common.collect.ImmutableList;
 import com.diffplug.spotless.Provisioner;
 
-/** Gradle integration for Provisioner. */
+/** Should be package-private. */
+@Deprecated
 public class GradleProvisioner {
 	private GradleProvisioner() {}
 
-	//	@Deprecated
-	//	public static Provisioner fromProject(Project project) {
-	//		return project.getPlugins().apply(SpotlessPlugin.class).getExtension().registerDependenciesTask.rootProvisioner;
-	//	}
+	@Deprecated
+	public static Provisioner fromProject(Project project) {
+		return project.getPlugins().apply(SpotlessPlugin.class).getExtension().registerDependenciesTask.rootProvisioner;
+	}
 
 	/** The provisioner used for the root project. */
 	static class RootProvisioner implements Provisioner {

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

@@ -38,7 +38,7 @@
 public class GroovyExtension extends FormatExtension implements HasBuiltinDelimiterForLicense {
 	static final String NAME = "groovy";
 
-	public GroovyExtension(SpotlessExtension spotless) {
+	public GroovyExtension(SpotlessExtensionBase spotless) {
 		super(spotless);
 	}
 

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

@@ -24,7 +24,7 @@ public class GroovyGradleExtension extends FormatExtension {
 	private static final String GRADLE_FILE_EXTENSION = "*.gradle";
 	static final String NAME = "groovyGradle";
 
-	public GroovyGradleExtension(SpotlessExtension spotless) {
+	public GroovyGradleExtension(SpotlessExtensionBase spotless) {
 		super(spotless);
 	}
 

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

@@ -40,7 +40,7 @@
 public class JavaExtension extends FormatExtension implements HasBuiltinDelimiterForLicense {
 	static final String NAME = "java";
 
-	public JavaExtension(SpotlessExtension spotless) {
+	public JavaExtension(SpotlessExtensionBase spotless) {
 		super(spotless);
 	}
 

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

@@ -33,7 +33,7 @@
 public class KotlinExtension extends FormatExtension implements HasBuiltinDelimiterForLicense {
 	static final String NAME = "kotlin";
 
-	public KotlinExtension(SpotlessExtension spotless) {
+	public KotlinExtension(SpotlessExtensionBase spotless) {
 		super(spotless);
 	}
 

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

@@ -29,7 +29,7 @@ public class KotlinGradleExtension extends FormatExtension {
 
 	static final String NAME = "kotlinGradle";
 
-	public KotlinGradleExtension(SpotlessExtension spotless) {
+	public KotlinGradleExtension(SpotlessExtensionBase spotless) {
 		super(spotless);
 	}
 

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

@@ -31,7 +31,7 @@
 public class ScalaExtension extends FormatExtension {
 	static final String NAME = "scala";
 
-	public ScalaExtension(SpotlessExtension spotless) {
+	public ScalaExtension(SpotlessExtensionBase spotless) {
 		super(spotless);
 	}
 

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 DiffPlug
+ * Copyright 2016-2020 DiffPlug
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -30,10 +30,10 @@
 import org.gradle.api.tasks.TaskAction;
 
 public class SpotlessApply extends DefaultTask {
-	private SpotlessTask source;
+	private SpotlessTaskBase source;
 
 	/** Bidirectional link between Apply and Spotless allows check to know if Apply ran or not. */
-	void linkSource(SpotlessTask source) {
+	void linkSource(SpotlessTaskBase source) {
 		this.source = source;
 		source.applyTask = this;
 	}

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

@@ -35,7 +35,7 @@
 import com.diffplug.spotless.extra.integration.DiffMessageFormatter;
 
 public class SpotlessCheck extends DefaultTask {
-	SpotlessTask source;
+	SpotlessTaskBase source;
 	private File spotlessOutDirectory;
 
 	@PathSensitive(PathSensitivity.RELATIVE)
@@ -81,9 +81,10 @@ public void visitFile(FileVisitDetails fileVisitDetails) {
 			});
 
 			if (!problemFiles.isEmpty()) {
-				Formatter formatter = source.buildFormatter();
-				Collections.sort(problemFiles);
-				throw formatViolationsFor(formatter, problemFiles);
+				try (Formatter formatter = source.buildFormatter()) {
+					Collections.sort(problemFiles);
+					throw formatViolationsFor(formatter, problemFiles);
+				}
 			}
 		}
 	}