Separate the core SpotlessTask from check and apply

.circleci/config.yml

@@ -8,6 +8,10 @@ anchors:
       GRADLE_OPTS: "-Dorg.gradle.workers.max=2" # and we're only allowed to use 2 vCPUs
     docker:
       - image: cimg/openjdk:8.0
+  env_gradle_large: &env_gradle_large
+    << : *env_gradle
+    resource_class: large # https://circleci.com/docs/2.0/configuration-reference/#resource_class
+    GRADLE_OPTS: "-Dorg.gradle.workers.max=4"
 
   restore_cache_wrapper: &restore_cache_wrapper
     restore_cache:
@@ -41,7 +45,7 @@ version: 2
 jobs:
   # gradlew spotlessCheck assemble testClasses
   assemble_testClasses: 
-    <<: *env_gradle
+    <<: *env_gradle_large
     steps:
       - checkout
       - *restore_cache_wrapper
@@ -64,10 +68,10 @@ jobs:
           key: gradle-deps2-{{ checksum "build.gradle" }}-{{ checksum "gradle.properties" }}
   # JRE8: export SPOTLESS_EXCLUDE_MAVEN=true && ./gradlew check
   test_nomaven_8:
-    <<: *env_gradle
+    <<: *env_gradle_large
     <<: *test_nomaven
   test_nomaven_11:
-    <<: *env_gradle
+    <<: *env_gradle_large
     docker:
       - image: cimg/openjdk:11.0
     environment: # java 11 does play nice with containers, doesn't need special settings

CHANGES.md

@@ -10,6 +10,8 @@ This document is intended for Spotless developers.
 We adhere to the [keepachangelog](https://keepachangelog.com/en/1.0.0/) format (starting after version `1.27.0`).
 
 ## [Unreleased]
+### Fixed
+* `PaddedCell.DirtyState::writeCanonicalTo(File)` can now create a new file if necessary (previously required to overwrite an existing file) ([#576](https://github.com/diffplug/spotless/pull/576)).
 
 ## [1.30.0] - 2020-05-11
 ### Added

gradle/java-setup.gradle

@@ -36,7 +36,6 @@ spotbugs {
 	toolVersion = VER_SPOTBUGS
 	ignoreFailures = false 	// bug free or it doesn't ship!
 	reportsDir = file('build/spotbugs')
-	effort = 'max'			// min|default|max
 	reportLevel = 'medium'	// low|medium|high (low = sensitive to even minor mistakes)
 	omitVisitors = []		// bugs that we want to ignore
 }
@@ -46,6 +45,9 @@ tasks.named('spotbugsTest') {
 tasks.named('spotbugsMain') {
 	// only run on Java 8 (no benefit to running twice)
 	enabled = org.gradle.api.JavaVersion.current() == org.gradle.api.JavaVersion.VERSION_1_8
+	reports {
+		html.enabled = true
+	}
 }
 dependencies {
 	compileOnly 'net.jcip:jcip-annotations:1.0'

lib/src/main/java/com/diffplug/spotless/PaddedCell.java

@@ -21,7 +21,6 @@
 import java.io.IOException;
 import java.io.OutputStream;
 import java.nio.file.Files;
-import java.nio.file.StandardOpenOption;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
@@ -258,7 +257,7 @@ private byte[] canonicalBytes() {
 		}
 
 		public void writeCanonicalTo(File file) throws IOException {
-			Files.write(file.toPath(), canonicalBytes(), StandardOpenOption.TRUNCATE_EXISTING);
+			Files.write(file.toPath(), canonicalBytes());
 		}
 
 		public void writeCanonicalTo(OutputStream out) throws IOException {

plugin-gradle/CHANGES.md

@@ -3,6 +3,16 @@
 We adhere to the [keepachangelog](https://keepachangelog.com/en/1.0.0/) format (starting after version `3.27.0`).
 
 ## [Unreleased]
+**TLDR: This version improves performance and adds support for the local Gradle Build Cache.  You will not need to make any changes in your buildscript.**  It is a breaking change only for a few users who have built *other* plugins on top of this one.
+
+### Added
+* Support for the gradle build cache. ([#576](https://github.com/diffplug/spotless/pull/576))
+  * The local cache will work great, but the remote cache will always miss until [#566](https://github.com/diffplug/spotless/issues/566) is resolved.
+### Removed
+* (Power users only) `void SpotlessTask::setCheck()` and `setApply()` have been removed. ([#576](https://github.com/diffplug/spotless/pull/576))
+  * Previously, the `check` and `apply` tasks were just marker tasks, and they called `setCheck` and `setApply` on the "worker" task.  Now `check` and `apply` are real tasks in their own right, so the marker-task kludge is no longer necessary.
+### Changed
+* (Power users only) `SpotlessTask FormatExtension::createIndependentTask` has been removed, and replaced with `SpotlessApply::createIndependentApplyTask`. ([#576](https://github.com/diffplug/spotless/pull/576))
 
 ## [3.30.0] - 2020-05-11
 ### Added

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

@@ -613,30 +613,31 @@ protected Project getProject() {
 	}
 
 	/**
-	 * Creates an independent {@link SpotlessTask} for (very) unusual circumstances.
+	 * Creates an independent {@link SpotlessApply} for (very) unusual circumstances.
 	 *
 	 * Most users will not want this method.  In the rare case that you want to create
-	 * a SpotlessTask which is independent of the normal Spotless machinery, this will
+	 * a `SpotlessApply` which is independent of the normal Spotless machinery, this will
 	 * let you do that.
 	 *
-	 * The returned task will have no dependencies on any other task.
-	 * You need to call {@link SpotlessTask#setApply()} and/or {@link SpotlessTask#setCheck()}
-	 * on the return value, otherwise you will get a runtime error when the task tries to run.
+	 * The returned task will not be hooked up to the global `spotlessApply`, and there will be no corresponding `check` task.
 	 *
 	 * NOTE: does not respect the rarely-used [`spotlessFiles` property](https://github.com/diffplug/spotless/blob/b7f8c551a97dcb92cc4b0ee665448da5013b30a3/plugin-gradle/README.md#can-i-apply-spotless-to-specific-files).
 	 */
-	public SpotlessTask createIndependentTask(String taskName) {
+	public SpotlessApply createIndependentApplyTask(String taskName) {
 		// create and setup the task
-		SpotlessTask spotlessTask = root.project.getTasks().create(taskName, SpotlessTask.class);
+		SpotlessTask spotlessTask = root.project.getTasks().create(taskName + "Helper", SpotlessTask.class);
 		setupTask(spotlessTask);
-
 		// enforce the clean ordering
 		Task clean = root.project.getTasks().getByName(BasePlugin.CLEAN_TASK_NAME);
 		spotlessTask.mustRunAfter(clean);
-
 		// ignore the filePatterns
 		spotlessTask.setFilePatterns("");
+		// create the apply task
+		SpotlessApply applyTask = root.project.getTasks().create(taskName, SpotlessApply.class);
+		applyTask.setSpotlessOutDirectory(spotlessTask.getOutputDirectory());
+		applyTask.source = spotlessTask;
+		applyTask.dependsOn(spotlessTask);
 
-		return spotlessTask;
+		return applyTask;
 	}
 }

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

@@ -0,0 +1,72 @@
+/*
+ * Copyright 2016 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 java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.StandardCopyOption;
+
+import org.gradle.api.DefaultTask;
+import org.gradle.api.file.ConfigurableFileTree;
+import org.gradle.api.file.FileVisitDetails;
+import org.gradle.api.file.FileVisitor;
+import org.gradle.api.tasks.InputDirectory;
+import org.gradle.api.tasks.PathSensitive;
+import org.gradle.api.tasks.PathSensitivity;
+import org.gradle.api.tasks.TaskAction;
+
+public class SpotlessApply extends DefaultTask {
+	SpotlessTask source;
+	private File spotlessOutDirectory;
+
+	@PathSensitive(PathSensitivity.RELATIVE)
+	@InputDirectory
+	public File getSpotlessOutDirectory() {
+		return spotlessOutDirectory;
+	}
+
+	public void setSpotlessOutDirectory(File spotlessOutDirectory) {
+		this.spotlessOutDirectory = spotlessOutDirectory;
+	}
+
+	@TaskAction
+	public void performAction() {
+		ConfigurableFileTree files = getProject().fileTree(spotlessOutDirectory);
+		if (files.isEmpty()) {
+			getState().setDidWork(source.getDidWork());
+		} else {
+			files.visit(new FileVisitor() {
+				@Override
+				public void visitDir(FileVisitDetails fileVisitDetails) {
+
+				}
+
+				@Override
+				public void visitFile(FileVisitDetails fileVisitDetails) {
+					String path = fileVisitDetails.getPath();
+					File originalSource = new File(getProject().getProjectDir(), path);
+					try {
+						getLogger().debug("Copying " + fileVisitDetails.getFile() + " to " + originalSource);
+						Files.copy(fileVisitDetails.getFile().toPath(), originalSource.toPath(), StandardCopyOption.REPLACE_EXISTING);
+					} catch (IOException e) {
+						throw new RuntimeException(e);
+					}
+				}
+			});
+		}
+	}
+}

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

@@ -0,0 +1,88 @@
+/*
+ * Copyright 2016 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 java.io.File;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import org.gradle.api.DefaultTask;
+import org.gradle.api.GradleException;
+import org.gradle.api.file.ConfigurableFileTree;
+import org.gradle.api.file.FileVisitDetails;
+import org.gradle.api.file.FileVisitor;
+import org.gradle.api.tasks.InputDirectory;
+import org.gradle.api.tasks.PathSensitive;
+import org.gradle.api.tasks.PathSensitivity;
+import org.gradle.api.tasks.TaskAction;
+
+import com.diffplug.spotless.Formatter;
+import com.diffplug.spotless.extra.integration.DiffMessageFormatter;
+
+public class SpotlessCheck extends DefaultTask {
+	SpotlessTask source;
+	private File spotlessOutDirectory;
+
+	@PathSensitive(PathSensitivity.RELATIVE)
+	@InputDirectory
+	public File getSpotlessOutDirectory() {
+		return spotlessOutDirectory;
+	}
+
+	public void setSpotlessOutDirectory(File spotlessOutDirectory) {
+		this.spotlessOutDirectory = spotlessOutDirectory;
+	}
+
+	@TaskAction
+	public void performAction() throws Exception {
+		ConfigurableFileTree files = getProject().fileTree(spotlessOutDirectory);
+		if (files.isEmpty()) {
+			getState().setDidWork(source.getDidWork());
+		} else {
+			List<File> problemFiles = new ArrayList<>();
+			files.visit(new FileVisitor() {
+				@Override
+				public void visitDir(FileVisitDetails fileVisitDetails) {
+
+				}
+
+				@Override
+				public void visitFile(FileVisitDetails fileVisitDetails) {
+					String path = fileVisitDetails.getPath();
+					File originalSource = new File(getProject().getProjectDir(), path);
+					problemFiles.add(originalSource);
+				}
+			});
+
+			if (!problemFiles.isEmpty()) {
+				Formatter formatter = source.buildFormatter();
+				Collections.sort(problemFiles);
+				throw formatViolationsFor(formatter, problemFiles);
+			}
+		}
+	}
+
+	/** Returns an exception which indicates problem files nicely. */
+	private static GradleException formatViolationsFor(Formatter formatter, List<File> problemFiles) {
+		return new GradleException(DiffMessageFormatter.builder()
+				.runToFix("Run 'gradlew spotlessApply' to fix these violations.")
+				.formatter(formatter)
+				.problemFiles(problemFiles)
+				.getMessage());
+	}
+
+}

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

@@ -27,15 +27,11 @@
 import org.gradle.api.GradleException;
 import org.gradle.api.Project;
 import org.gradle.api.Task;
-import org.gradle.api.execution.TaskExecutionGraph;
 import org.gradle.api.plugins.BasePlugin;
 
 import com.diffplug.common.base.Errors;
 import com.diffplug.spotless.LineEnding;
 
-import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
-import groovy.lang.Closure;
-
 public class SpotlessExtension {
 	final Project project;
 	final Task rootCheckTask, rootApplyTask, rootDiagnoseTask;
@@ -237,7 +233,7 @@ private <T extends FormatExtension> T maybeCreate(String name, Class<T> clazz) {
 				Constructor<T> constructor = clazz.getConstructor(SpotlessExtension.class);
 				T formatExtension = constructor.newInstance(this);
 				formats.put(name, formatExtension);
-				createFormatTask(name, formatExtension);
+				createFormatTasks(name, formatExtension);
 				return formatExtension;
 			} catch (NoSuchMethodException e) {
 				throw new GradleException("Must have a constructor " + clazz.getSimpleName() + "(SpotlessExtension root)", e);
@@ -247,8 +243,14 @@ private <T extends FormatExtension> T maybeCreate(String name, Class<T> clazz) {
 		}
 	}
 
+	/**
+	 * Creates 3 tasks for the supplied format:
+	 * - "spotless{FormatName}" is the main `SpotlessTask` that does the work for this format
+	 * - "spotless{FormatName}Check" will depend on the main spotless task in `check` mode
+	 * - "spotless{FormatName}Apply" will depend on the main spotless task in `apply` mode
+	 */
 	@SuppressWarnings("rawtypes")
-	private void createFormatTask(String name, FormatExtension formatExtension) {
+	private void createFormatTasks(String name, FormatExtension formatExtension) {
 		// create the SpotlessTask
 		String taskName = EXTENSION + SpotlessPlugin.capitalize(name);
 		SpotlessTask spotlessTask = project.getTasks().create(taskName, SpotlessTask.class);
@@ -259,27 +261,15 @@ private void createFormatTask(String name, FormatExtension formatExtension) {
 		spotlessTask.mustRunAfter(clean);
 
 		// create the check and apply control tasks
-		Task checkTask = project.getTasks().create(taskName + CHECK);
-		Task applyTask = project.getTasks().create(taskName + APPLY);
-
+		SpotlessCheck checkTask = project.getTasks().create(taskName + CHECK, SpotlessCheck.class);
+		checkTask.setSpotlessOutDirectory(spotlessTask.getOutputDirectory());
+		checkTask.source = spotlessTask;
 		checkTask.dependsOn(spotlessTask);
+
+		SpotlessApply applyTask = project.getTasks().create(taskName + APPLY, SpotlessApply.class);
+		applyTask.setSpotlessOutDirectory(spotlessTask.getOutputDirectory());
+		applyTask.source = spotlessTask;
 		applyTask.dependsOn(spotlessTask);
-		// when the task graph is ready, we'll configure the spotlessTask appropriately
-		project.getGradle().getTaskGraph().whenReady(new Closure(null) {
-			private static final long serialVersionUID = 1L;
-
-			// called by gradle
-			@SuppressFBWarnings("UMAC_UNCALLABLE_METHOD_OF_ANONYMOUS_CLASS")
-			public Object doCall(TaskExecutionGraph graph) {
-				if (graph.hasTask(checkTask)) {
-					spotlessTask.setCheck();
-				}
-				if (graph.hasTask(applyTask)) {
-					spotlessTask.setApply();
-				}
-				return Closure.DONE;
-			}
-		});
 
 		// set the filePatterns property
 		project.afterEvaluate(unused -> {