Gradle: slighltly simpler build.

build.gradle

@@ -33,7 +33,7 @@ sourceSets {
 }
 
 java {
-	sourceCompatibility = JavaVersion.VERSION_11
+	sourceCompatibility = JavaVersion.VERSION_1_8
 	withJavadocJar()
 	withSourcesJar()
 	registerFeature('dtdparse') {
@@ -51,44 +51,44 @@ dependencies {
 	testImplementation "junit:junit:4.13.1"
 }
 
-tasks.register('jvmVersionAttribute') {
-	description = "Set the correct 'org.gradle.jvm.version' attribute"
-	def jvmVersionAttribute = Attribute.of('org.gradle.jvm.version', Integer)
-	configurations.each {
-		if (it.canBeConsumed) {
-			def categoryAttr = it.attributes.getAttribute(Category.CATEGORY_ATTRIBUTE)
-			if (categoryAttr != null && categoryAttr.name == Category.LIBRARY) {
-				def usageAttr = it.attributes.getAttribute(Usage.USAGE_ATTRIBUTE)
-				if (usageAttr != null && (usageAttr.name == Usage.JAVA_API
-						|| usageAttr.name == Usage.JAVA_RUNTIME)) {
-					it.attributes.attribute(jvmVersionAttribute, 8)
-				}
-			}
+repositories {
+	maven {
+		url = uri('https://repo.maven.apache.org/maven2/')
+	}
+	maven {
+		url "https://css4j.github.io/maven/"
+		mavenContent {
+			releasesOnly()
+		}
+		content {
+			includeGroup 'io.sf.carte'
+			includeGroup 'io.sf.jclf'
 		}
 	}
 }
 
-compileJava.dependsOn tasks.jvmVersionAttribute
+tasks.compileJava {
+	excludes += ['module-info.java']
+	modularity.inferModulePath = false
+}
 
-tasks.register('compileLegacyJava', JavaCompile) {
-	description = 'Compile to Java 8 bytecode, except module-info'
+tasks.register('compileModuleInfo', JavaCompile) {
+	description = 'Compile module-info to Java 11 bytecode'
 	dependsOn tasks.compileJava
-	sourceCompatibility = JavaVersion.VERSION_1_8
-	targetCompatibility = JavaVersion.VERSION_1_8
-	source = tasks.compileJava.stableSources
-	classpath = tasks.compileJava.classpath
-	destinationDirectory = tasks.compileJava.destinationDirectory
-	modularity.inferModulePath = false
-	includes = tasks.compileJava.includes
-	excludes = tasks.compileJava.excludes
-	excludes += ['module-info.java']
+	sourceCompatibility = JavaVersion.VERSION_11
+	targetCompatibility = JavaVersion.VERSION_11
+	source = sourceSets.main.java
+	classpath = sourceSets.main.compileClasspath
+	destinationDirectory = sourceSets.main.java.destinationDirectory
+	modularity.inferModulePath = true
+	includes = ['module-info.java']
 }
 
-classes.dependsOn compileLegacyJava
+classes.dependsOn compileModuleInfo
 
 // Check bytecode version, in case some other task screws it
 tasks.register('checkLegacyJava') {
-	description = 'Check Java 8 bytecode'
+	description = 'Check that classes are Java 8 bytecode (except module-info)'
 	def classdir = sourceSets.main.output.classesDirs.files.stream().findAny().get()
 	def classfiles = fileTree(classdir).matching({it.exclude('module-info.class')}).files
 	doFirst() {
@@ -108,22 +108,6 @@ tasks.register('checkLegacyJava') {
 
 classes.finalizedBy checkLegacyJava
 
-repositories {
-	maven {
-		url = uri('https://repo.maven.apache.org/maven2/')
-	}
-	maven {
-		url "https://css4j.github.io/maven/"
-		mavenContent {
-			releasesOnly()
-		}
-		content {
-			includeGroup 'io.sf.carte'
-			includeGroup 'io.sf.jclf'
-		}
-	}
-}
-
 tasks.register('lineEndingConversion', CRLFConvert) {
 	description 'Convert LICENSE.txt to Windows line endings'
 	file "$rootDir/LICENSE.txt"
@@ -149,6 +133,7 @@ tasks.withType(Javadoc) {
 	options.addStringOption('Xdoclint:none', '-quiet')
 	options.addStringOption('encoding', 'UTF-8')
 	options.addStringOption('charset', 'UTF-8')
+	options.links 'https://docs.oracle.com/en/java/javase/11/docs/api/'
 }
 
 // Reproducible build