Introduce cleanthat refactorer

lib/build.gradle

@@ -55,6 +55,7 @@ dependencies {
 	testCommonImplementation "org.junit.jupiter:junit-jupiter:$VER_JUNIT"
 	testCommonImplementation "org.assertj:assertj-core:$VER_ASSERTJ"
 	testCommonImplementation "com.diffplug.durian:durian-testlib:$VER_DURIAN"
+	testCommonImplementation 'io.github.solven-eu.cleanthat:java:2.1'
 
 	// used for pom sorting
 	sortPomCompileOnly 'com.github.ekryd.sortpom:sortpom-sorter:3.0.0'
@@ -102,7 +103,9 @@ dependencies {
 
 	gsonCompileOnly 'com.google.code.gson:gson:2.10.1'
 
-	cleanthatCompileOnly 'io.github.solven-eu.cleanthat:java:2.0'
+	// TODO How can one add a test module like 'compatKtLint0Dot48Dot0'?
+	// cleanthatCompileAndTestOnly 'io.github.solven-eu.cleanthat:java:2.1'
+	cleanthatCompileOnly 'io.github.solven-eu.cleanthat:java:2.1'
 }
 
 // we'll hold the core lib to a high standard

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

@@ -39,7 +39,7 @@ public final class CleanthatJavaStep {
 	private static final String NAME = "cleanthat";
 	private static final String MAVEN_COORDINATE = "io.github.solven-eu.cleanthat:java";
 
-	private static final Jvm.Support<String> JVM_SUPPORT = Jvm.<String> support(NAME).add(11, "2.0");
+	private static final Jvm.Support<String> JVM_SUPPORT = Jvm.<String> support(NAME).add(11, "2.1");
 
 	// prevent direct instantiation
 	private CleanthatJavaStep() {}

lib/src/test/java/com/diffplug/spotless/glue/java/JavaCleanthatRefactorerFuncTest.java

@@ -0,0 +1,28 @@
+/*
+ * Copyright 2023 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.spotless.glue.java;
+
+import org.assertj.core.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import eu.solven.cleanthat.engine.java.refactorer.JavaRefactorer;
+
+public class JavaCleanthatRefactorerFuncTest {
+	@Test
+	public void testMutatorsDetection() {
+		Assertions.assertThat(JavaRefactorer.getAllIncluded()).isNotEmpty();
+	}
+}

lib/src/testCleanthat/java/com/diffplug/spotless/glue/java/JavaCleanthatRefactorerFuncTest.java

@@ -0,0 +1,72 @@
+/*
+ * Copyright 2023 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.spotless.glue.ktlint.compat;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+public class KtLintCompat0Dot48Dot0AdapterTest {
+	@Test
+	public void testDefaults(@TempDir Path path) throws IOException {
+		KtLintCompat0Dot48Dot0Adapter ktLintCompat0Dot48Dot0Adapter = new KtLintCompat0Dot48Dot0Adapter();
+		String text = loadAndWriteText(path, "empty_class_body.kt");
+		final Path filePath = Paths.get(path.toString(), "empty_class_body.kt");
+
+		Map<String, String> userData = new HashMap<>();
+
+		Map<String, Object> editorConfigOverrideMap = new HashMap<>();
+
+		String formatted = ktLintCompat0Dot48Dot0Adapter.format(text, filePath, false, false, null, userData, editorConfigOverrideMap);
+		assertEquals("class empty_class_body\n", formatted);
+	}
+
+	@Test
+	public void testEditorConfigCanDisable(@TempDir Path path) throws IOException {
+		KtLintCompat0Dot48Dot0Adapter ktLintCompat0Dot48Dot0Adapter = new KtLintCompat0Dot48Dot0Adapter();
+		String text = loadAndWriteText(path, "fails_no_semicolons.kt");
+		final Path filePath = Paths.get(path.toString(), "fails_no_semicolons.kt");
+
+		Map<String, String> userData = new HashMap<>();
+
+		Map<String, Object> editorConfigOverrideMap = new HashMap<>();
+		editorConfigOverrideMap.put("indent_style", "tab");
+		editorConfigOverrideMap.put("ktlint_standard_no-semi", "disabled");
+		// ktlint_filename is an invalid rule in ktlint 0.48.0
+		editorConfigOverrideMap.put("ktlint_filename", "disabled");
+
+		String formatted = ktLintCompat0Dot48Dot0Adapter.format(text, filePath, false, false, null, userData, editorConfigOverrideMap);
+		assertEquals("class fails_no_semicolons {\n\tval i = 0;\n}\n", formatted);
+	}
+
+	private static String loadAndWriteText(Path path, String name) throws IOException {
+		try (InputStream is = KtLintCompat0Dot48Dot0AdapterTest.class.getResourceAsStream("/" + name)) {
+			Files.copy(is, path.resolve(name));
+		}
+		return new String(Files.readAllBytes(path.resolve(name)), StandardCharsets.UTF_8);
+	}
+
+}

plugin-maven/src/test/java/com/diffplug/spotless/maven/java/CleanthatJavaRefactorerTest.java

@@ -70,7 +70,7 @@ void testIncludeOnlyLiteralsFirstInComparisons() throws Exception {
 	private void runTest(String dirtyPath, String cleanPath) throws Exception {
 		String path = "src/main/java/test.java";
 		setFile(path).toResource("java/cleanthat/" + dirtyPath);
-		Assertions.assertThat(mavenRunner().withArguments("spotless:apply -X").runNoError().stdOutUtf8()).isEmpty();
+		Assertions.assertThat(mavenRunner().withArguments("spotless:apply").withRemoteDebug(21654).runNoError().stdOutUtf8()).doesNotContain("[ERROR]");
 		assertFile(path).sameAsResource("java/cleanthat/" + cleanPath);
 	}
 }