upgrade to gradle 7.1, java 16, javafx 16

build.gradle

@@ -4,25 +4,14 @@ buildscript {
             url "https://plugins.gradle.org/m2/"
         }
     }
-    dependencies {
-        classpath "org.javamodularity:moduleplugin:1.6.0"
-    }
 }
 
 plugins {
-    id 'java'
+    id 'java-library'
+    id 'extra-java-module-info'
     id 'com.github.johnrengelman.shadow' version '5.2.0'
 }
 
-def javamodularityPluginId = 'org.javamodularity.moduleplugin'
-final hasPlugin = project.getPlugins().hasPlugin(javamodularityPluginId);
-if(hasPlugin) {
-    final Plugin plugin = project.getPlugins().getPlugin(javamodularityPluginId)
-    println 'Plugin already applied - version ' + plugin.properties['javamodularityPluginId']
-} else {
-    apply plugin: "org.javamodularity.moduleplugin"
-}
-
 tasks.withType(AbstractArchiveTask) {
     preserveFileTimestamps = false
     reproducibleFileOrder = true
@@ -65,7 +54,7 @@ dependencies {
 }
 
 task(runDrongo, dependsOn: 'classes', type: JavaExec) {
-    main = 'com.sparrowwallet.drongo.Main'
+    mainClass = 'com.sparrowwallet.drongo.Main'
     classpath = sourceSets.main.runtimeClasspath
     args 'drongo.properties'
 }
@@ -85,3 +74,30 @@ shadowJar {
     archiveVersion = '0.9'
     classifier = 'all'
 }
+
+extraJavaModuleInfo {
+    module('logback-core-1.2.3.jar', 'logback.core', '1.2.3') {
+        exports('ch.qos.logback.core')
+        exports('ch.qos.logback.core.spi')
+        requires('java.xml')
+    }
+    module('logback-classic-1.2.3.jar', 'logback.classic', '1.2.3') {
+        exports('ch.qos.logback.classic')
+        exports('ch.qos.logback.classic.spi')
+        requires('org.slf4j')
+        requires('logback.core')
+        requires('java.xml')
+        requires('java.logging')
+    }
+    module('jeromq-0.5.0.jar', 'jeromq', '0.5.0') {
+        exports('org.zeromq')
+    }
+    module('json-simple-1.1.1.jar', 'json.simple', '1.1.1') {
+        exports('org.json.simple')
+        exports('org.json.simple.parser')
+    }
+    module('jnacl-1.0.0.jar', 'eu.neilalexander.jnacl', '1.0.0')
+    module('junit-4.12.jar', 'junit', '4.12') {
+        exports('org.junit')
+    }
+}

buildSrc/build.gradle

@@ -0,0 +1,21 @@
+plugins {
+    id 'java-gradle-plugin' // so we can assign and ID to our plugin
+}
+
+dependencies {
+    implementation 'org.ow2.asm:asm:8.0.1'
+}
+
+repositories {
+    mavenCentral()
+}
+
+gradlePlugin {
+    plugins {
+        // here we register our plugin with an ID
+        register("extra-java-module-info") {
+            id = "extra-java-module-info"
+            implementationClass = "org.gradle.sample.transform.javamodules.ExtraModuleInfoPlugin"
+        }
+    }
+}

buildSrc/src/main/java/org/gradle/sample/transform/javamodules/ExtraModuleInfoPlugin.java

@@ -0,0 +1,54 @@
+package org.gradle.sample.transform.javamodules;
+
+import org.gradle.api.Plugin;
+import org.gradle.api.Project;
+import org.gradle.api.artifacts.Configuration;
+import org.gradle.api.attributes.Attribute;
+import org.gradle.api.plugins.JavaPlugin;
+
+/**
+ * Entry point of our plugin that should be applied in the root project.
+ */
+public class ExtraModuleInfoPlugin implements Plugin<Project> {
+
+    @Override
+    public void apply(Project project) {
+        // register the plugin extension as 'extraJavaModuleInfo {}' configuration block
+        ExtraModuleInfoPluginExtension extension = project.getObjects().newInstance(ExtraModuleInfoPluginExtension.class);
+        project.getExtensions().add(ExtraModuleInfoPluginExtension.class, "extraJavaModuleInfo", extension);
+
+        // setup the transform for all projects in the build
+        project.getPlugins().withType(JavaPlugin.class).configureEach(javaPlugin -> configureTransform(project, extension));
+    }
+
+    private void configureTransform(Project project, ExtraModuleInfoPluginExtension extension) {
+        Attribute<String> artifactType = Attribute.of("artifactType", String.class);
+        Attribute<Boolean> javaModule = Attribute.of("javaModule", Boolean.class);
+
+        // compile and runtime classpath express that they only accept modules by requesting the javaModule=true attribute
+        project.getConfigurations().matching(this::isResolvingJavaPluginConfiguration).all(
+                c -> c.getAttributes().attribute(javaModule, true));
+
+        // all Jars have a javaModule=false attribute by default; the transform also recognizes modules and returns them without modification
+        project.getDependencies().getArtifactTypes().getByName("jar").getAttributes().attribute(javaModule, false);
+
+        // register the transform for Jars and "javaModule=false -> javaModule=true"; the plugin extension object fills the input parameter
+        project.getDependencies().registerTransform(ExtraModuleInfoTransform.class, t -> {
+            t.parameters(p -> {
+                p.setModuleInfo(extension.getModuleInfo());
+                p.setAutomaticModules(extension.getAutomaticModules());
+            });
+            t.getFrom().attribute(artifactType, "jar").attribute(javaModule, false);
+            t.getTo().attribute(artifactType, "jar").attribute(javaModule, true);
+        });
+    }
+
+    private boolean isResolvingJavaPluginConfiguration(Configuration configuration) {
+        if (!configuration.isCanBeResolved()) {
+            return false;
+        }
+        return configuration.getName().endsWith(JavaPlugin.COMPILE_CLASSPATH_CONFIGURATION_NAME.substring(1))
+                || configuration.getName().endsWith(JavaPlugin.RUNTIME_CLASSPATH_CONFIGURATION_NAME.substring(1))
+                || configuration.getName().endsWith(JavaPlugin.ANNOTATION_PROCESSOR_CONFIGURATION_NAME.substring(1));
+    }
+}

buildSrc/src/main/java/org/gradle/sample/transform/javamodules/ExtraModuleInfoPluginExtension.java

@@ -0,0 +1,52 @@
+package org.gradle.sample.transform.javamodules;
+
+
+import org.gradle.api.Action;
+
+import javax.annotation.Nullable;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * A data class to collect all the module information we want to add.
+ * Here the class is used as extension that can be configured in the build script
+ * and as input to the ExtraModuleInfoTransform that add the information to Jars.
+ */
+public class ExtraModuleInfoPluginExtension {
+
+    private final Map<String, ModuleInfo> moduleInfo = new HashMap<>();
+    private final Map<String, String> automaticModules = new HashMap<>();
+
+    /**
+     * Add full module information for a given Jar file.
+     */
+    public void module(String jarName, String moduleName, String moduleVersion) {
+        module(jarName, moduleName, moduleVersion, null);
+    }
+
+    /**
+     * Add full module information, including exported packages and dependencies, for a given Jar file.
+     */
+    public void module(String jarName, String moduleName, String moduleVersion, @Nullable Action<? super ModuleInfo> conf) {
+        ModuleInfo moduleInfo = new ModuleInfo(moduleName, moduleVersion);
+        if (conf != null) {
+            conf.execute(moduleInfo);
+        }
+        this.moduleInfo.put(jarName, moduleInfo);
+    }
+
+    /**
+     * Add only an automatic module name to a given jar file.
+     */
+    public void automaticModule(String jarName, String moduleName) {
+        automaticModules.put(jarName, moduleName);
+    }
+
+    protected Map<String, ModuleInfo> getModuleInfo() {
+        return moduleInfo;
+    }
+
+    protected Map<String, String> getAutomaticModules() {
+        return automaticModules;
+    }
+}

buildSrc/src/main/java/org/gradle/sample/transform/javamodules/ExtraModuleInfoTransform.java

@@ -0,0 +1,164 @@
+package org.gradle.sample.transform.javamodules;
+
+import org.gradle.api.artifacts.transform.InputArtifact;
+import org.gradle.api.artifacts.transform.TransformAction;
+import org.gradle.api.artifacts.transform.TransformOutputs;
+import org.gradle.api.artifacts.transform.TransformParameters;
+import org.gradle.api.file.FileSystemLocation;
+import org.gradle.api.provider.Provider;
+import org.gradle.api.tasks.Input;
+import org.objectweb.asm.ClassWriter;
+import org.objectweb.asm.ModuleVisitor;
+import org.objectweb.asm.Opcodes;
+
+import java.io.*;
+import java.util.Collections;
+import java.util.Map;
+import java.util.jar.*;
+import java.util.regex.Pattern;
+import java.util.zip.ZipEntry;
+
+/**
+ * An artifact transform that applies additional information to Jars without module information.
+ * The transformation fails the build if a Jar does not contain information and no extra information
+ * was defined for it. This way we make sure that all Jars are turned into modules.
+ */
+abstract public class ExtraModuleInfoTransform implements TransformAction<ExtraModuleInfoTransform.Parameter> {
+
+    public static class Parameter implements TransformParameters, Serializable {
+        private Map<String, ModuleInfo> moduleInfo = Collections.emptyMap();
+        private Map<String, String> automaticModules = Collections.emptyMap();
+
+        @Input
+        public Map<String, ModuleInfo> getModuleInfo() {
+            return moduleInfo;
+        }
+
+        @Input
+        public Map<String, String> getAutomaticModules() {
+            return automaticModules;
+        }
+
+        public void setModuleInfo(Map<String, ModuleInfo> moduleInfo) {
+            this.moduleInfo = moduleInfo;
+        }
+
+        public void setAutomaticModules(Map<String, String> automaticModules) {
+            this.automaticModules = automaticModules;
+        }
+    }
+
+    @InputArtifact
+    protected abstract Provider<FileSystemLocation> getInputArtifact();
+
+    @Override
+    public void transform(TransformOutputs outputs) {
+        Map<String, ModuleInfo> moduleInfo = getParameters().moduleInfo;
+        Map<String, String> automaticModules = getParameters().automaticModules;
+        File originalJar = getInputArtifact().get().getAsFile();
+        String originalJarName = originalJar.getName();
+
+        if (isModule(originalJar)) {
+            outputs.file(originalJar);
+        } else if (moduleInfo.containsKey(originalJarName)) {
+            addModuleDescriptor(originalJar, getModuleJar(outputs, originalJar), moduleInfo.get(originalJarName));
+        } else if (isAutoModule(originalJar)) {
+            outputs.file(originalJar);
+        } else if (automaticModules.containsKey(originalJarName)) {
+            addAutomaticModuleName(originalJar,  getModuleJar(outputs, originalJar), automaticModules.get(originalJarName));
+        } else {
+            throw new RuntimeException("Not a module and no mapping defined: " + originalJarName);
+        }
+    }
+
+    private boolean isModule(File jar) {
+        Pattern moduleInfoClassMrjarPath = Pattern.compile("META-INF/versions/\\d+/module-info.class");
+        try (JarInputStream inputStream =  new JarInputStream(new FileInputStream(jar))) {
+            boolean isMultiReleaseJar = containsMultiReleaseJarEntry(inputStream);
+            ZipEntry next = inputStream.getNextEntry();
+            while (next != null) {
+                if ("module-info.class".equals(next.getName())) {
+                    return true;
+                }
+                if (isMultiReleaseJar && moduleInfoClassMrjarPath.matcher(next.getName()).matches()) {
+                    return true;
+                }
+                next = inputStream.getNextEntry();
+            }
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+        return false;
+    }
+
+    private boolean containsMultiReleaseJarEntry(JarInputStream jarStream) {
+        Manifest manifest = jarStream.getManifest();
+        return manifest != null && Boolean.parseBoolean(manifest.getMainAttributes().getValue("Multi-Release"));
+    }
+
+    private boolean isAutoModule(File jar) {
+        try (JarInputStream inputStream = new JarInputStream(new FileInputStream(jar))) {
+            return inputStream.getManifest().getMainAttributes().getValue("Automatic-Module-Name") != null;
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private File getModuleJar(TransformOutputs outputs, File originalJar) {
+        return outputs.file(originalJar.getName().substring(0, originalJar.getName().lastIndexOf('.')) + "-module.jar");
+    }
+
+    private static void addAutomaticModuleName(File originalJar, File moduleJar, String moduleName) {
+        try (JarInputStream inputStream = new JarInputStream(new FileInputStream(originalJar))) {
+            Manifest manifest = inputStream.getManifest();
+            manifest.getMainAttributes().put(new Attributes.Name("Automatic-Module-Name"), moduleName);
+            try (JarOutputStream outputStream = new JarOutputStream(new FileOutputStream(moduleJar), inputStream.getManifest())) {
+                copyEntries(inputStream, outputStream);
+            }
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private static void addModuleDescriptor(File originalJar, File moduleJar, ModuleInfo moduleInfo) {
+        try (JarInputStream inputStream = new JarInputStream(new FileInputStream(originalJar))) {
+            try (JarOutputStream outputStream = new JarOutputStream(new FileOutputStream(moduleJar), inputStream.getManifest())) {
+                copyEntries(inputStream, outputStream);
+                outputStream.putNextEntry(new JarEntry("module-info.class"));
+                outputStream.write(addModuleInfo(moduleInfo));
+                outputStream.closeEntry();
+            }
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private static void copyEntries(JarInputStream inputStream, JarOutputStream outputStream) throws IOException {
+        JarEntry jarEntry = inputStream.getNextJarEntry();
+        while (jarEntry != null) {
+            outputStream.putNextEntry(jarEntry);
+            outputStream.write(inputStream.readAllBytes());
+            outputStream.closeEntry();
+            jarEntry = inputStream.getNextJarEntry();
+        }
+    }
+
+    private static byte[] addModuleInfo(ModuleInfo moduleInfo) {
+        ClassWriter classWriter = new ClassWriter(0);
+        classWriter.visit(Opcodes.V9, Opcodes.ACC_MODULE, "module-info", null, null, null);
+        ModuleVisitor moduleVisitor = classWriter.visitModule(moduleInfo.getModuleName(), Opcodes.ACC_OPEN, moduleInfo.getModuleVersion());
+        for (String packageName : moduleInfo.getExports()) {
+            moduleVisitor.visitExport(packageName.replace('.', '/'), 0);
+        }
+        moduleVisitor.visitRequire("java.base", 0, null);
+        for (String requireName : moduleInfo.getRequires()) {
+            moduleVisitor.visitRequire(requireName, 0, null);
+        }
+        for (String requireName : moduleInfo.getRequiresTransitive()) {
+            moduleVisitor.visitRequire(requireName, Opcodes.ACC_TRANSITIVE, null);
+        }
+        moduleVisitor.visitEnd();
+        classWriter.visitEnd();
+        return classWriter.toByteArray();
+    }
+}

buildSrc/src/main/java/org/gradle/sample/transform/javamodules/ModuleInfo.java

@@ -0,0 +1,53 @@
+package org.gradle.sample.transform.javamodules;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Data class to hold the information that should be added as module-info.class to an existing Jar file.
+ */
+public class ModuleInfo implements Serializable {
+    private String moduleName;
+    private String moduleVersion;
+    private List<String> exports = new ArrayList<>();
+    private List<String> requires = new ArrayList<>();
+    private List<String> requiresTransitive = new ArrayList<>();
+
+    ModuleInfo(String moduleName, String moduleVersion) {
+        this.moduleName = moduleName;
+        this.moduleVersion = moduleVersion;
+    }
+
+    public void exports(String exports) {
+        this.exports.add(exports);
+    }
+
+    public void requires(String requires) {
+        this.requires.add(requires);
+    }
+
+    public void requiresTransitive(String requiresTransitive) {
+        this.requiresTransitive.add(requiresTransitive);
+    }
+
+    public String getModuleName() {
+        return moduleName;
+    }
+
+    protected String getModuleVersion() {
+        return moduleVersion;
+    }
+
+    protected List<String> getExports() {
+        return exports;
+    }
+
+    protected List<String> getRequires() {
+        return requires;
+    }
+
+    protected List<String> getRequiresTransitive() {
+        return requiresTransitive;
+    }
+}

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradlew

@@ -82,6 +82,7 @@ esac
 
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
+
 # Determine the Java command to use to start the JVM.
 if [ -n "$JAVA_HOME" ] ; then
     if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
@@ -129,6 +130,7 @@ fi
 if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
     JAVACMD=`cygpath --unix "$JAVACMD"`
 
     # We build the pattern for arguments to be converted via cygpath

gradlew.bat

@@ -40,7 +40,7 @@ if defined JAVA_HOME goto findJavaFromJavaHome
 
 set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto init
+if "%ERRORLEVEL%" == "0" goto execute
 
 echo.
 echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
@@ -54,7 +54,7 @@ goto fail
 set JAVA_HOME=%JAVA_HOME:"=%
 set JAVA_EXE=%JAVA_HOME%/bin/java.exe
 
-if exist "%JAVA_EXE%" goto init
+if exist "%JAVA_EXE%" goto execute
 
 echo.
 echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
@@ -64,28 +64,14 @@ echo location of your Java installation.
 
 goto fail
 
-:init
-@rem Get command-line arguments, handling Windows variants
-
-if not "%OS%" == "Windows_NT" goto win9xME_args
-
-:win9xME_args
-@rem Slurp the command line arguments.
-set CMD_LINE_ARGS=
-set _SKIP=2
-
-:win9xME_args_slurp
-if "x%~1" == "x" goto execute
-
-set CMD_LINE_ARGS=%*
-
 :execute
 @rem Setup the command line
 
 set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
 
+
 @rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
 
 :end
 @rem End local scope for the variables with windows NT shell