Rework gradle, making use of toolchain feature

build.gradle

@@ -33,18 +33,6 @@ allprojects {
     apply plugin: 'kotlin'
     apply plugin: 'com.diffplug.spotless'
 
-    java {
-        targetCompatibility = JavaVersion.VERSION_1_8
-    }
-
-    compileJava {
-        options.release = 8
-    }
-
-    tasks.withType(JavaCompile).configureEach {
-        options.release = 8
-    }
-
     // Only generate jar for submodules
     // without this we would generate an empty pgpainless.jar for the project root
     // https://stackoverflow.com/a/25445035
@@ -68,8 +56,6 @@ allprojects {
     description = "Simple to use OpenPGP API for Java based on Bouncycastle"
     version = shortVersion
 
-    sourceCompatibility = javaSourceCompatibility
-
     repositories {
         mavenCentral()
         mavenLocal()
@@ -84,6 +70,10 @@ allprojects {
         fileMode = 0644
     }
 
+    kotlin {
+        jvmToolchain(javaSourceCompatibility)
+    }
+
     // Compatibility of default implementations in kotlin interfaces with Java implementations.
     tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).configureEach {
         kotlinOptions {
@@ -124,7 +114,7 @@ allprojects {
         sourceDirectories.setFrom(project.files(sourceSets.main.allSource.srcDirs))
         classDirectories.setFrom(project.files(sourceSets.main.output))
         reports {
-            xml.enabled true
+            xml.required = true
         }
     }
 
@@ -142,15 +132,15 @@ subprojects {
     apply plugin: 'signing'
 
     task sourcesJar(type: Jar, dependsOn: classes) {
-        classifier = 'sources'
+        archiveClassifier = 'sources'
         from sourceSets.main.allSource
     }
     task javadocJar(type: Jar, dependsOn: javadoc) {
-        classifier = 'javadoc'
+        archiveClassifier = 'javadoc'
         from javadoc.destinationDir
     }
     task testsJar(type: Jar, dependsOn: testClasses) {
-        classifier = 'tests'
+        archiveClassifier = 'tests'
         from sourceSets.test.output
     }
 
@@ -247,7 +237,7 @@ task jacocoRootReport(type: JacocoReport) {
     classDirectories.setFrom(files(subprojects.sourceSets.main.output))
     executionData.setFrom(files(subprojects.jacocoTestReport.executionData))
     reports {
-        xml.enabled true
+        xml.required = true
         xml.destination file("${buildDir}/reports/jacoco/test/jacocoTestReport.xml")
     }
     // We could remove the following setOnlyIf line, but then
@@ -258,10 +248,6 @@ task jacocoRootReport(type: JacocoReport) {
 }
 
 task javadocAll(type: Javadoc) {
-    def currentJavaVersion = JavaVersion.current()
-    if (currentJavaVersion.compareTo(JavaVersion.VERSION_1_9) >= 0) {
-        options.addStringOption("-release", "8");
-    }
     source subprojects.collect {project ->
         project.sourceSets.main.allJava }
     destinationDir = new File(buildDir, 'javadoc')
@@ -275,18 +261,6 @@ task javadocAll(type: Javadoc) {
     ] as String[]
 }
 
-if (JavaVersion.current().isJava8Compatible()) {
-    tasks.withType(Javadoc) {
-        // The '-quiet' as second argument is actually a hack,
-        // since the one paramater addStringOption doesn't seem to
-        // work, we extra add '-quiet', which is added anyway by
-        // gradle. See https://github.com/gradle/gradle/issues/2354
-        // See JDK-8200363 (https://bugs.openjdk.java.net/browse/JDK-8200363)
-        // for information about the -Xwerror option.
-        // options.addStringOption('Xwerror', '-quiet')
-    }
-}
-
 /**
  * Fetch sha256 checksums of artifacts published to maven central.
  *

pgpainless-cli/build.gradle

@@ -4,7 +4,6 @@
 
 plugins {
     id 'application'
-    id "com.github.johnrengelman.shadow" version "6.1.0"
 }
 
 dependencies {
@@ -31,22 +30,6 @@ mainClassName = 'org.pgpainless.cli.PGPainlessCLI'
 application {
     mainClass = mainClassName
 }
-/**
-jar {
-    duplicatesStrategy(DuplicatesStrategy.EXCLUDE)
-    manifest {
-        attributes 'Main-Class': "$mainClassName"
-    }
-
-    from {
-        configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) }
-    } {
-        exclude "META-INF/*.SF"
-        exclude "META-INF/*.DSA"
-        exclude "META-INF/*.RSA"
-    }
-}
- */
 
 run {
     // https://stackoverflow.com/questions/59445306/pipe-into-gradle-run
@@ -56,5 +39,3 @@ run {
         args Eval.me(appArgs)
     }
 }
-
-// tasks."jar".dependsOn(":pgpainless-core:assemble", ":pgpainless-sop:assemble")

version.gradle

@@ -6,8 +6,7 @@ allprojects {
     ext {
         shortVersion = '1.7.5'
         isSnapshot = true
-        pgpainlessMinAndroidSdk = 10
-        javaSourceCompatibility = 1.8
+        javaSourceCompatibility = 11
         bouncyCastleVersion = '1.80'
         bouncyPgVersion = bouncyCastleVersion
         junitVersion = '5.8.2'