Skeleton implementation of modern versions of our primary elements.

Author: nedtwigg

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

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+/*
+ * 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.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.diffplug.gradle.spotless;
+
+import org.gradle.api.Project;
+
+public class SpotlessExtensionModern extends SpotlessExtensionBase {
+	public SpotlessExtensionModern(Project project) {
+		super(project);
+	}
+
+	@Override
+	protected void createFormatTasks(String name, FormatExtension formatExtension) {
+		// TODO level 1: implement SpotlessExtension::createFormatTasks, but using config avoidance
+		// TODO level 2: override configure(String name, Class<T> clazz, Action<T> configure) so that it is lazy
+	}
+}

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

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+/*
+ * 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.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.diffplug.gradle.spotless;
+
+import org.gradle.api.Plugin;
+import org.gradle.api.Project;
+import org.gradle.api.Task;
+import org.gradle.api.plugins.BasePlugin;
+
+import com.diffplug.spotless.SpotlessCache;
+
+public class SpotlessPluginModern implements Plugin<Project> {
+	@Override
+	public void apply(Project project) {
+		// make sure there's a `clean` task
+		project.getPlugins().apply(BasePlugin.class);
+
+		// setup the extension
+		project.getExtensions().create(SpotlessExtension.EXTENSION, SpotlessExtensionModern.class, project);
+
+		// clear spotless' cache when the user does a clean
+		Task clean = project.getTasks().getByName(BasePlugin.CLEAN_TASK_NAME);
+		clean.doLast(unused -> {
+			// resolution for: https://github.com/diffplug/spotless/issues/243#issuecomment-564323856
+			// project.getRootProject() is consistent across every project, so only of one the clears will
+			// actually happen (as desired)
+			//
+			// we use System.identityHashCode() to avoid a memory leak by hanging on to the reference directly
+			SpotlessCache.clearOnce(System.identityHashCode(project.getRootProject()));
+		});
+	}
+}

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

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+/*
+ * 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.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.diffplug.gradle.spotless;
+
+import org.gradle.api.tasks.CacheableTask;
+import org.gradle.api.tasks.TaskAction;
+
+@CacheableTask
+public class SpotlessTaskModern extends SpotlessTask {
+	@TaskAction
+	public void performAction() throws Exception {
+		// TODO: implement using the InputChanges api
+	}
+}