Add support for KtLint editorConfigOverride

.editorconfig

@@ -16,6 +16,8 @@ indent_size = 2
 # Doc: https://youtrack.jetbrains.com/issue/IDEA-170643#focus=streamItem-27-3708697.0-0
 ij_java_imports_layout = java.**,|,javax.**,|,org.**,|,com.**,|,com.diffplug.**,|,*
 ij_java_use_single_class_imports = true
+ij_java_class_count_to_use_import_on_demand = 999
+ij_java_names_count_to_use_import_on_demand = 999
 
 [*.xml.mustache]
 indent_style = space

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]
+### Added
+* Support for `editorConfigOverride` in `ktlint`. ([#1218](https://github.com/diffplug/spotless/pull/1218) fixes [#1193](https://github.com/diffplug/spotless/issues/1193))
 
 ## [2.25.3] - 2022-05-10
 ### Fixed

lib/src/ktlint/java/com/diffplug/spotless/glue/ktlint/KtlintFormatterFunc.java

@@ -17,18 +17,26 @@
 
 import java.io.File;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
 
 import com.pinterest.ktlint.core.KtLint;
-import com.pinterest.ktlint.core.KtLint.Params;
+import com.pinterest.ktlint.core.KtLint.ExperimentalParams;
 import com.pinterest.ktlint.core.LintError;
 import com.pinterest.ktlint.core.RuleSet;
+import com.pinterest.ktlint.core.api.DefaultEditorConfigProperties;
+import com.pinterest.ktlint.core.api.EditorConfigOverride;
+import com.pinterest.ktlint.core.api.UsesEditorConfigProperties;
 import com.pinterest.ktlint.ruleset.experimental.ExperimentalRuleSetProvider;
 import com.pinterest.ktlint.ruleset.standard.StandardRuleSetProvider;
 
 import com.diffplug.spotless.FormatterFunc;
 
+import kotlin.Pair;
 import kotlin.Unit;
 import kotlin.jvm.functions.Function2;
 
@@ -38,8 +46,13 @@ public class KtlintFormatterFunc implements FormatterFunc.NeedsFile {
 	private final Map<String, String> userData;
 	private final Function2<? super LintError, ? super Boolean, Unit> formatterCallback;
 	private final boolean isScript;
+	private final EditorConfigOverride editorConfigOverride;
 
-	public KtlintFormatterFunc(boolean isScript, boolean useExperimental, Map<String, String> userData) {
+	/**
+	 * Non-empty editorConfigOverrideMap requires KtLint 0.45.2.
+	 */
+	public KtlintFormatterFunc(boolean isScript, boolean useExperimental, Map<String, String> userData,
+			Map<String, Object> editorConfigOverrideMap) {
 		rulesets = new ArrayList<>();
 		rulesets.add(new StandardRuleSetProvider().get());
 
@@ -49,6 +62,46 @@ public KtlintFormatterFunc(boolean isScript, boolean useExperimental, Map<String
 		this.userData = userData;
 		formatterCallback = new FormatterCallback();
 		this.isScript = isScript;
+
+		if (editorConfigOverrideMap.isEmpty()) {
+			this.editorConfigOverride = null;
+		} else {
+			this.editorConfigOverride = createEditorConfigOverride(editorConfigOverrideMap);
+		}
+	}
+
+	/**
+	 * Create EditorConfigOverride from user provided parameters.
+	 * Calling this method requires KtLint 0.45.2.
+	 */
+	private EditorConfigOverride createEditorConfigOverride(Map<String, Object> editorConfigOverrideMap) {
+		// Get properties from rules in the rule sets
+		Stream<UsesEditorConfigProperties.EditorConfigProperty<?>> ruleProperties = rulesets.stream()
+				.flatMap(ruleSet -> Arrays.stream(ruleSet.getRules()))
+				.filter(rule -> rule instanceof UsesEditorConfigProperties)
+				.flatMap(rule -> ((UsesEditorConfigProperties) rule).getEditorConfigProperties().stream());
+
+		// Create a mapping of properties to their names based on rule properties and default properties
+		Map<String, UsesEditorConfigProperties.EditorConfigProperty<?>> supportedProperties = Stream
+				.concat(ruleProperties, DefaultEditorConfigProperties.INSTANCE.getDefaultEditorConfigProperties().stream())
+				.distinct()
+				.collect(Collectors.toMap(property -> property.getType().getName(), property -> property));
+
+		// Create config properties based on provided property names and values
+		@SuppressWarnings("unchecked")
+		Pair<UsesEditorConfigProperties.EditorConfigProperty<?>, ?>[] properties = editorConfigOverrideMap.entrySet().stream()
+				.map(entry -> {
+					UsesEditorConfigProperties.EditorConfigProperty<?> property = supportedProperties.get(entry.getKey());
+					if (property != null) {
+						return new Pair<>(property, entry.getValue());
+					} else {
+						return null;
+					}
+				})
+				.filter(Objects::nonNull)
+				.toArray(Pair[]::new);
+
+		return EditorConfigOverride.Companion.from(properties);
 	}
 
 	static class FormatterCallback implements Function2<LintError, Boolean, Unit> {
@@ -63,14 +116,31 @@ public Unit invoke(LintError lint, Boolean corrected) {
 
 	@Override
 	public String applyWithFile(String unix, File file) throws Exception {
-		return KtLint.INSTANCE.format(new Params(
-				file.getName(),
-				unix,
-				rulesets,
-				userData,
-				formatterCallback,
-				isScript,
-				null,
-				false));
+
+		if (editorConfigOverride != null) {
+			// Use ExperimentalParams with EditorConfigOverride which requires KtLint 0.45.2
+			return KtLint.INSTANCE.format(new ExperimentalParams(
+					file.getName(),
+					unix,
+					rulesets,
+					userData,
+					formatterCallback,
+					isScript,
+					null,
+					false,
+					editorConfigOverride,
+					false));
+		} else {
+			// Use Params for backward compatibility
+			return KtLint.INSTANCE.format(new KtLint.Params(
+					file.getName(),
+					unix,
+					rulesets,
+					userData,
+					formatterCallback,
+					isScript,
+					null,
+					false));
+		}
 	}
 }

lib/src/main/java/com/diffplug/spotless/kotlin/BadSemver.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021 DiffPlug
+ * Copyright 2021-2022 DiffPlug
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -26,13 +26,18 @@ protected static int version(String input) {
 		}
 		String major = matcher.group(1);
 		String minor = matcher.group(2);
-		return version(Integer.parseInt(major), Integer.parseInt(minor));
+		String patch = matcher.group(3);
+		return version(Integer.parseInt(major), Integer.parseInt(minor), patch != null ? Integer.parseInt(patch) : 0);
 	}
 
 	/** Ambiguous after 2147.483647.blah-blah */
+	protected static int version(int major, int minor, int patch) {
+		return major * 1_000_000 + minor * 1_000 + patch;
+	}
+
 	protected static int version(int major, int minor) {
-		return major * 1_000_000 + minor;
+		return version(major, minor, 0);
 	}
 
-	private static final Pattern BAD_SEMVER = Pattern.compile("(\\d+)\\.(\\d+)");
+	private static final Pattern BAD_SEMVER = Pattern.compile("(\\d+)\\.(\\d+)\\.*(\\d+)*");
 }

lib/src/main/java/com/diffplug/spotless/kotlin/KtLintStep.java

@@ -50,26 +50,29 @@ public static FormatterStep create(Provisioner provisioner) {
 	}
 
 	public static FormatterStep create(String version, Provisioner provisioner) {
-		return create(version, provisioner, false, Collections.emptyMap());
+		return create(version, provisioner, false, Collections.emptyMap(), Collections.emptyMap());
 	}
 
-	public static FormatterStep create(String version, Provisioner provisioner, boolean useExperimental, Map<String, String> userData) {
-		return create(version, provisioner, false, useExperimental, userData);
+	public static FormatterStep create(String version, Provisioner provisioner, boolean useExperimental,
+			Map<String, String> userData, Map<String, Object> editorConfigOverride) {
+		return create(version, provisioner, false, useExperimental, userData, editorConfigOverride);
 	}
 
 	public static FormatterStep createForScript(String version, Provisioner provisioner) {
-		return create(version, provisioner, true, false, Collections.emptyMap());
+		return create(version, provisioner, true, false, Collections.emptyMap(), Collections.emptyMap());
 	}
 
-	public static FormatterStep createForScript(String version, Provisioner provisioner, boolean useExperimental, Map<String, String> userData) {
-		return create(version, provisioner, true, useExperimental, userData);
+	public static FormatterStep createForScript(String version, Provisioner provisioner, boolean useExperimental,
+			Map<String, String> userData, Map<String, Object> editorConfigOverride) {
+		return create(version, provisioner, true, useExperimental, userData, editorConfigOverride);
 	}
 
-	private static FormatterStep create(String version, Provisioner provisioner, boolean isScript, boolean useExperimental, Map<String, String> userData) {
+	private static FormatterStep create(String version, Provisioner provisioner, boolean isScript, boolean useExperimental,
+			Map<String, String> userData, Map<String, Object> editorConfigOverride) {
 		Objects.requireNonNull(version, "version");
 		Objects.requireNonNull(provisioner, "provisioner");
 		return FormatterStep.createLazy(NAME,
-				() -> new State(version, provisioner, isScript, useExperimental, userData),
+				() -> new State(version, provisioner, isScript, useExperimental, userData, editorConfigOverride),
 				State::createFormat);
 	}
 
@@ -87,11 +90,20 @@ static final class State implements Serializable {
 		final JarState jarState;
 		private final boolean useExperimental;
 		private final TreeMap<String, String> userData;
+		private final TreeMap<String, Object> editorConfigOverride;
 		private final boolean useParams;
 
-		State(String version, Provisioner provisioner, boolean isScript, boolean useExperimental, Map<String, String> userData) throws IOException {
+		State(String version, Provisioner provisioner, boolean isScript, boolean useExperimental,
+				Map<String, String> userData, Map<String, Object> editorConfigOverride) throws IOException {
+
+			if (!editorConfigOverride.isEmpty() &&
+					BadSemver.version(version) < BadSemver.version(0, 45, 2)) {
+				throw new IllegalStateException("KtLint editorConfigOverride supported for version 0.45.2 and later");
+			}
+
 			this.useExperimental = useExperimental;
 			this.userData = new TreeMap<>(userData);
+			this.editorConfigOverride = new TreeMap<>(editorConfigOverride);
 			String coordinate;
 			if (BadSemver.version(version) < BadSemver.version(0, 32)) {
 				coordinate = MAVEN_COORDINATE_PRE_0_32;
@@ -108,8 +120,8 @@ static final class State implements Serializable {
 		FormatterFunc createFormat() throws Exception {
 			if (useParams) {
 				Class<?> formatterFunc = jarState.getClassLoader().loadClass("com.diffplug.spotless.glue.ktlint.KtlintFormatterFunc");
-				Constructor<?> constructor = formatterFunc.getConstructor(boolean.class, boolean.class, Map.class);
-				return (FormatterFunc.NeedsFile) constructor.newInstance(isScript, useExperimental, userData);
+				Constructor<?> constructor = formatterFunc.getConstructor(boolean.class, boolean.class, Map.class, Map.class);
+				return (FormatterFunc.NeedsFile) constructor.newInstance(isScript, useExperimental, userData, editorConfigOverride);
 			}
 
 			ClassLoader classLoader = jarState.getClassLoader();

plugin-gradle/CHANGES.md

@@ -3,6 +3,9 @@
 We adhere to the [keepachangelog](https://keepachangelog.com/en/1.0.0/) format (starting after version `3.27.0`).
 
 ## [Unreleased]
+### Added
+* Support for `editorConfigOverride` in `ktlint`. ([#1218](https://github.com/diffplug/spotless/pull/1218) fixes [#1193](https://github.com/diffplug/spotless/issues/1193))
+  * If you are using properties like `indent_size`, you should pass now pass them as `editorConfigOverride` and not as `userData`.
 
 ## [6.6.1] - 2022-05-13
 ### Fixed

plugin-gradle/README.md

@@ -335,15 +335,18 @@ spotless {
 
 ### ktlint
 
-[homepage](https://github.com/pinterest/ktlint). [changelog](https://github.com/pinterest/ktlint/releases).  Spotless does not ([yet](https://github.com/diffplug/spotless/issues/142)) respect the `.editorconfig` settings ([ktlint docs](https://github.com/pinterest/ktlint#editorconfig)), but you can provide them manually as `userData`.
+[homepage](https://github.com/pinterest/ktlint). [changelog](https://github.com/pinterest/ktlint/releases).  Spotless does not ([yet](https://github.com/diffplug/spotless/issues/142)) respect the `.editorconfig` settings ([ktlint docs](https://github.com/pinterest/ktlint#editorconfig)), but you can provide them manually as `editorConfigOverride`.
 
 ```kotlin
 spotless {
   kotlin {
-    // version, setUseExperimental and userData are all optional
-    ktlint('0.43.2')
+    // version, setUseExperimental, userData and editorConfigOverride are all optional
+    ktlint("0.45.2")
       .setUseExperimental(true)
-      .userData(mapOf('indent_size' to '2', 'continuation_indent_size' to '2'))
+      .userData(mapOf("android" to "true"))
+      .editorConfigOverride(mapOf("indent_size" to 2))
+  }
+}
 ```
 
 ### diktat

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

@@ -30,6 +30,7 @@
 import org.gradle.api.plugins.JavaPluginConvention;
 import org.gradle.api.tasks.SourceSet;
 
+import com.diffplug.common.collect.ImmutableSortedMap;
 import com.diffplug.spotless.FileSignature;
 import com.diffplug.spotless.FormatterStep;
 import com.diffplug.spotless.kotlin.DiktatStep;
@@ -59,7 +60,7 @@ public LicenseHeaderConfig licenseHeaderFile(Object licenseHeaderFile) {
 	/** Adds the specified version of <a href="https://github.com/pinterest/ktlint">ktlint</a>. */
 	public KotlinFormatExtension ktlint(String version) {
 		Objects.requireNonNull(version);
-		return new KotlinFormatExtension(version, false, Collections.emptyMap());
+		return new KotlinFormatExtension(version, false, Collections.emptyMap(), Collections.emptyMap());
 	}
 
 	public KotlinFormatExtension ktlint() {
@@ -71,11 +72,14 @@ public class KotlinFormatExtension {
 		private final String version;
 		private boolean useExperimental;
 		private Map<String, String> userData;
+		private Map<String, Object> editorConfigOverride;
 
-		KotlinFormatExtension(String version, boolean useExperimental, Map<String, String> config) {
+		KotlinFormatExtension(String version, boolean useExperimental, Map<String, String> config,
+				Map<String, Object> editorConfigOverride) {
 			this.version = version;
 			this.useExperimental = useExperimental;
 			this.userData = config;
+			this.editorConfigOverride = editorConfigOverride;
 			addStep(createStep());
 		}
 
@@ -88,13 +92,21 @@ public KotlinFormatExtension setUseExperimental(boolean useExperimental) {
 		public KotlinFormatExtension userData(Map<String, String> userData) {
 			// Copy the map to a sorted map because up-to-date checking is based on binary-equals of the serialized
 			// representation.
-			this.userData = userData;
+			this.userData = ImmutableSortedMap.copyOf(userData);
+			replaceStep(createStep());
+			return this;
+		}
+
+		public KotlinFormatExtension editorConfigOverride(Map<String, Object> editorConfigOverride) {
+			// Copy the map to a sorted map because up-to-date checking is based on binary-equals of the serialized
+			// representation.
+			this.editorConfigOverride = ImmutableSortedMap.copyOf(editorConfigOverride);
 			replaceStep(createStep());
 			return this;
 		}
 
 		private FormatterStep createStep() {
-			return KtLintStep.create(version, provisioner(), useExperimental, userData);
+			return KtLintStep.create(version, provisioner(), useExperimental, userData, editorConfigOverride);
 		}
 	}
 

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

@@ -45,7 +45,7 @@ public KotlinGradleExtension(SpotlessExtension spotless) {
 	/** Adds the specified version of <a href="https://github.com/pinterest/ktlint">ktlint</a>. */
 	public KotlinFormatExtension ktlint(String version) {
 		Objects.requireNonNull(version, "version");
-		return new KotlinFormatExtension(version, false, Collections.emptyMap());
+		return new KotlinFormatExtension(version, false, Collections.emptyMap(), Collections.emptyMap());
 	}
 
 	public KotlinFormatExtension ktlint() {
@@ -57,11 +57,14 @@ public class KotlinFormatExtension {
 		private final String version;
 		private boolean useExperimental;
 		private Map<String, String> userData;
+		private Map<String, Object> editorConfigOverride;
 
-		KotlinFormatExtension(String version, boolean useExperimental, Map<String, String> config) {
+		KotlinFormatExtension(String version, boolean useExperimental, Map<String, String> config,
+				Map<String, Object> editorConfigOverride) {
 			this.version = version;
 			this.useExperimental = useExperimental;
 			this.userData = config;
+			this.editorConfigOverride = editorConfigOverride;
 			addStep(createStep());
 		}
 
@@ -79,8 +82,16 @@ public KotlinFormatExtension userData(Map<String, String> userData) {
 			return this;
 		}
 
+		public KotlinFormatExtension editorConfigOverride(Map<String, Object> editorConfigOverride) {
+			// Copy the map to a sorted map because up-to-date checking is based on binary-equals of the serialized
+			// representation.
+			this.editorConfigOverride = ImmutableSortedMap.copyOf(editorConfigOverride);
+			replaceStep(createStep());
+			return this;
+		}
+
 		private FormatterStep createStep() {
-			return KtLintStep.createForScript(version, provisioner(), useExperimental, userData);
+			return KtLintStep.createForScript(version, provisioner(), useExperimental, userData, editorConfigOverride);
 		}
 	}