enable spotless

Author: gavinking

build.gradle

@@ -25,6 +25,7 @@ plugins {
 	id 'org.hibernate.orm.database-service' apply false
 	id 'biz.aQute.bnd' version '7.0.0' apply false
 
+	id 'com.diffplug.spotless' version '6.25.0'
 	id 'org.checkerframework' version '0.6.40'
 	id 'org.hibernate.orm.build.jdks'
 

gradle/java-module.gradle

@@ -33,6 +33,7 @@ apply plugin: 'org.hibernate.orm.build.java-module'
 
 apply plugin: 'org.checkerframework'
 apply plugin: 'de.thetaphi.forbiddenapis'
+apply plugin: 'com.diffplug.spotless'
 
 apply plugin: "jacoco"
 apply plugin: 'checkstyle'
@@ -194,6 +195,7 @@ tasks.withType( JavaCompile ) {
 	]
 }
 
+tasks.compileJava.dependsOn spotlessApply
 
 task compile(dependsOn: [compileJava, processResources, compileTestJava, processTestResources] )
 
@@ -466,6 +468,18 @@ task nonFatalCheckstyle(type:Checkstyle) {
 	configFile = rootProject.file( 'shared/config/checkstyle/checkstyle-non-fatal.xml' )
 }
 
+spotless {
+	//Don't fail during the check: rather than enforcing guidelines, we use this plugin to fix mistakes automatically.
+	enforceCheck false
+	java {
+		licenseHeaderFile rootProject.file('spotless.license.java')
+		removeUnusedImports()
+		trimTrailingWhitespace()
+		endWithNewline()
+	}
+}
+
+
 class CompilerStubsArgumentProvider implements CommandLineArgumentProvider {
 
     @InputDirectory

hibernate-core/hibernate-core.gradle

@@ -282,3 +282,8 @@ tasks.sourcesJar.dependsOn ':hibernate-core:generateGraphParser'
 tasks.sourcesJar.dependsOn ':hibernate-core:generateHqlParser'
 tasks.sourcesJar.dependsOn ':hibernate-core:generateSqlScriptParser'
 tasks.sourcesJar.dependsOn ':hibernate-core:generateOrderingParser'
+
+tasks.spotlessJava.dependsOn ':hibernate-core:generateGraphParser'
+tasks.spotlessJava.dependsOn ':hibernate-core:generateHqlParser'
+tasks.spotlessJava.dependsOn ':hibernate-core:generateSqlScriptParser'
+tasks.spotlessJava.dependsOn ':hibernate-core:generateOrderingParser'

spotless.license.java

@@ -0,0 +1,6 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
+ * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
+ */