tmp

Also added optional list of exclusion paths

.gitea/workflows/build.yaml

@@ -0,0 +1,14 @@
+name: CI
+on:
+  push:
+    branches: [ master ]
+jobs:
+  build:
+    runs-on: woryzen
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v4
+      - name: Execute Gradle build
+        env:
+          PUBLISHER_TOKEN: ${{ secrets.PUBLISHER_TOKEN }}
+        run: ./gradlew build publish

build.gradle

@@ -1,24 +1,36 @@
 subprojects { subproject ->
     apply plugin: 'java-library'
+    apply plugin: 'maven-publish'
 
+    group = "net.woggioni.gradle"
     version = getProperty('version.myGradlePlugins')
 
     java {
         toolchain {
-            languageVersion = JavaLanguageVersion.of(11)
+            languageVersion = JavaLanguageVersion.of(25)
         }
     }
 
+    tasks.named(JavaPlugin.JAR_TASK_NAME, Jar.class, {
+        manifest {
+            attributes.put(java.util.jar.Attributes.Name.SPECIFICATION_TITLE.toString(), subproject.getName());
+            attributes.put(java.util.jar.Attributes.Name.SPECIFICATION_VERSION.toString(), subproject.getVersion());
+        }
+    })
+
     int javaVersion
-    if(subproject.path == ':osgi-app') {
+    if(subproject.path == ':osgi-app' || subproject.path == ':multi-release-jar') {
         javaVersion = 11
     } else {
         javaVersion = 8
     }
+
+    if(subproject.path != ':finalguard:finalguard-javac-plugin') {
         tasks.named(JavaPlugin.COMPILE_JAVA_TASK_NAME, JavaCompile) {
             options.release = javaVersion
             options.compilerArgs << '-parameters'
         }
+    }
 
     pluginManager.withPlugin('groovy') {
         tasks.named("compileGroovy", GroovyCompile) {
@@ -27,12 +39,6 @@ subprojects { subproject ->
     }
 
     repositories {
-        maven {
-            url = woggioniMavenRepositoryUrl
-            content {
-                includeGroup 'net.woggioni'
-            }
-        }
         mavenCentral()
     }
 
@@ -41,25 +47,29 @@ subprojects { subproject ->
             add(conf, [group: "org.projectlombok", name: "lombok", version: catalog.versions.lombok.get()])
         }
         add("testImplementation", catalog.junit.jupiter.api)
+        add("testImplementation", catalog.junit.jupiter.params)
         add("testRuntimeOnly", catalog.junit.jupiter.engine)
+        add("testRuntimeOnly", catalog.junit.platform.launcher)
         add("testImplementation", gradleTestKit())
     }
 
-    tasks.named("test", Test) {
+    tasks.withType(Test) {
         useJUnitPlatform()
     }
-}
-
-childProjects.forEach { name, child ->
-    child.with {
-        apply plugin: 'maven-publish'
-
-        group = "net.woggioni.gradle"
 
     publishing {
         repositories {
             maven {
-                    url = woggioniMavenRepositoryUrl
+                name = "Gitea"
+                url = uri("https://gitea.woggioni.net/api/packages/woggioni/maven")
+
+                credentials(HttpHeaderCredentials) {
+                    name = "Authorization"
+                    value = "token ${System.getenv()["PUBLISHER_TOKEN"]}"
+                }
+
+                authentication {
+                    header(HttpHeaderAuthentication)
                 }
             }
         }

dependency-export/src/main/java/net/woggioni/gradle/dependency/export/DependencyExportPlugin.java

@@ -8,6 +8,9 @@ import org.gradle.api.plugins.ObjectConfigurationAction;
 import org.gradle.api.provider.Provider;
 
 public class DependencyExportPlugin implements Plugin<Project> {
+
+    public static final String DEPENDENCY_EXPORT_GROUP = "dependency-export";
+
     @Override
     public void apply(Project project) {
         project.apply(new Action<ObjectConfigurationAction>() {

dependency-export/src/main/java/net/woggioni/gradle/dependency/export/ExportDependencies.java

@@ -20,10 +20,13 @@ import org.gradle.api.file.FileCollection;
 import org.gradle.api.file.RegularFile;
 import org.gradle.api.file.RegularFileProperty;
 import org.gradle.api.model.ObjectFactory;
+import org.gradle.api.plugins.BasePluginExtension;
 import org.gradle.api.plugins.JavaPlugin;
-import org.gradle.api.plugins.JavaPluginConvention;
+import org.gradle.api.plugins.JavaPluginExtension;
+import org.gradle.api.plugins.ReportingBasePlugin;
 import org.gradle.api.provider.Property;
 import org.gradle.api.provider.Provider;
+import org.gradle.api.tasks.Classpath;
 import org.gradle.api.tasks.Input;
 import org.gradle.api.tasks.InputFiles;
 import org.gradle.api.tasks.Internal;
@@ -49,6 +52,8 @@ import java.util.stream.Collector;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
+import static net.woggioni.gradle.dependency.export.DependencyExportPlugin.DEPENDENCY_EXPORT_GROUP;
+
 public class ExportDependencies extends DefaultTask {
 
     @Getter(onMethod_ = { @Input })
@@ -71,9 +76,8 @@ public class ExportDependencies extends DefaultTask {
     @Getter(onMethod_ = { @Input })
     private final Property<Boolean> showArtifacts;
 
-    private final JavaPluginConvention javaPluginConvention;
-
     @InputFiles
+    @Classpath
     public Provider<FileCollection> getConfigurationFiles() {
         return configurationName.map(this::fetchConfiguration);
     }
@@ -96,11 +100,11 @@ public class ExportDependencies extends DefaultTask {
 
     @Inject
     public ExportDependencies(ObjectFactory objects) {
-        javaPluginConvention = getProject().getConvention().getPlugin(JavaPluginConvention.class);
+        setGroup(DEPENDENCY_EXPORT_GROUP);
         configurationName = objects.property(String.class).convention(JavaPlugin.RUNTIME_CLASSPATH_CONFIGURATION_NAME);
-        Provider<File> defaultOutputFileProvider =
+        final JavaPluginExtension javaPluginExtension = getProject().getExtensions().findByType(JavaPluginExtension.class);
-                getProject().provider(() -> new File(javaPluginConvention.getDocsDir(), "dependencies.dot"));
+        final Provider<RegularFile> defaultOutputFileProvider = javaPluginExtension.getDocsDir().file("dependencies.dot");
-        outputFile = objects.fileProperty().convention(getProject().getLayout().file(defaultOutputFileProvider));
+        outputFile = objects.fileProperty().convention(defaultOutputFileProvider);
         showArtifacts = objects.property(Boolean.class).convention(false);
     }
 

dependency-export/src/main/java/net/woggioni/gradle/dependency/export/RenderDependencies.java

@@ -7,32 +7,40 @@ import org.gradle.api.GradleException;
 import org.gradle.api.file.RegularFile;
 import org.gradle.api.file.RegularFileProperty;
 import org.gradle.api.model.ObjectFactory;
-import org.gradle.api.plugins.JavaPluginConvention;
+import org.gradle.api.plugins.JavaPluginExtension;
 import org.gradle.api.provider.Property;
 import org.gradle.api.provider.Provider;
+import org.gradle.api.tasks.CacheableTask;
 import org.gradle.api.tasks.Input;
 import org.gradle.api.tasks.InputFile;
 import org.gradle.api.tasks.Internal;
 import org.gradle.api.tasks.Optional;
 import org.gradle.api.tasks.OutputFile;
+import org.gradle.api.tasks.PathSensitive;
+import org.gradle.api.tasks.PathSensitivity;
 import org.gradle.api.tasks.TaskAction;
 import org.gradle.api.tasks.options.Option;
 
 import javax.inject.Inject;
 import java.io.File;
 import java.nio.file.Path;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
+import java.util.Objects;
 
+import static net.woggioni.gradle.dependency.export.DependencyExportPlugin.DEPENDENCY_EXPORT_GROUP;
+
+@CacheableTask
 public class RenderDependencies extends DefaultTask {
 
-    @Getter(onMethod_ = { @InputFile })
+    @Getter(onMethod_ = {@InputFile, @PathSensitive(PathSensitivity.NONE)})
     private Provider<File> sourceFile;
 
-    @Getter(onMethod_ = { @Input})
+    @Getter(onMethod_ = {@Input})
     private final Property<String> format;
 
-    @Getter(onMethod_ = { @Input })
+    @Getter(onMethod_ = {@Input})
     private final Property<String> graphvizExecutable;
 
     @Getter
@@ -45,13 +53,12 @@ public class RenderDependencies extends DefaultTask {
         return outputFile.map(RegularFile::getAsFile).map(File::getAbsolutePath).getOrNull();
     }
 
+    @Optional
     @OutputFile
     public Provider<File> getResult() {
         return outputFile.map(RegularFile::getAsFile);
     }
 
-    private final JavaPluginConvention javaPluginConvention;
-
     @Option(option = "output", description = "Set the output file name")
     public void setOutputCli(String outputFile) {
         Provider<File> fileProvider = getProject().provider(() -> new File(outputFile));
@@ -64,33 +71,45 @@ public class RenderDependencies extends DefaultTask {
     }
 
     public void setExportTask(Provider<ExportDependencies> taskProvider) {
+        dependsOn(taskProvider);
         sourceFile = taskProvider.flatMap(ExportDependencies::getResult);
     }
 
     @Inject
     public RenderDependencies(ObjectFactory objects) {
+        setGroup(DEPENDENCY_EXPORT_GROUP);
         sourceFile = objects.property(File.class);
-        javaPluginConvention = getProject().getConvention().getPlugin(JavaPluginConvention.class);
         format = objects.property(String.class).convention("xlib");
         graphvizExecutable = objects.property(String.class).convention("dot");
-        Provider<File> defaultOutputFileProvider =
+        final JavaPluginExtension javaPluginExtension = getProject().getExtensions().findByType(JavaPluginExtension.class);
-                getProject().provider(() -> new File(javaPluginConvention.getDocsDir(), "renderedDependencies"));
+        final Provider<RegularFile> defaultOutputFileProvider = javaPluginExtension.getDocsDir().file("renderedDependencies");
-        outputFile = objects.fileProperty().convention(getProject().getLayout().file(defaultOutputFileProvider));
+        outputFile = objects.fileProperty().convention(defaultOutputFileProvider
+                .zip(format, (file, type) -> Objects.equals("xlib", type) ? null : file));
+        getOutputs().upToDateWhen(t -> outputFile.isPresent());
     }
 
     @TaskAction
     @SneakyThrows
     void run() {
-        Path destination = outputFile
+        java.util.Optional<Path> destination = java.util.Optional.of(
+                    outputFile
                             .map(RegularFile::getAsFile)
                             .map(File::toPath)
-                .get();
+                )
-        List<String> cmd = Arrays.asList(
+                .filter(Provider::isPresent)
+                .map(Provider::get);
+
+        List<String> cmd = new ArrayList<>(Arrays.asList(
                 graphvizExecutable.get(),
-                "-T" + format.get(),
+                "-T" + format.get()
-                "-o" + destination,
+        ));
-                sourceFile.get().toString()
+
-        );
+        if (destination.isPresent()) {
+            cmd.add("-o");
+            cmd.add(destination.get().toString());
+        }
+        cmd.add(sourceFile.get().toString());
+
         int returnCode = new ProcessBuilder(cmd).inheritIO().start().waitFor();
         if (returnCode != 0) {
             throw new GradleException("Error invoking graphviz");

dependency-export/src/test/resources/net/woggioni/gradle/dependency/export/build.gradle.kts

@@ -4,7 +4,7 @@ plugins {
 }
 
 repositories {
-    jcenter()
+    mavenCentral()
     mavenLocal()
 }
 

finalguard/build.gradle

@@ -0,0 +1,12 @@
+plugins {
+    id 'java-gradle-plugin'
+}
+
+gradlePlugin {
+    plugins {
+        create("FinalGuardPlugin") {
+            id = 'net.woggioni.gradle.finalguard'
+            implementationClass = "net.woggioni.gradle.finalguard.FinalGuardPlugin"
+        }
+    }
+}

finalguard/finalguard-javac-plugin/build.gradle

@@ -0,0 +1,51 @@
+plugins {
+    id 'java-library'
+}
+
+group = "net.woggioni.finalguard"
+
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(25)
+    }
+}
+
+java {
+    sourceCompatibility(JavaVersion.VERSION_1_8.toString())
+    targetCompatibility(JavaVersion.VERSION_1_8.toString())
+    modularity.inferModulePath = false
+}
+
+tasks.named(org.gradle.api.plugins.JavaPlugin.COMPILE_JAVA_TASK_NAME, JavaCompile.class) {
+    options.compilerArgs << '-parameters'
+}
+
+configurations {
+    testCompileClasspath {
+        attributes {
+            attribute(org.gradle.api.attributes.java.TargetJvmVersion.TARGET_JVM_VERSION_ATTRIBUTE, 25)
+        }
+    }
+    testRuntimeClasspath {
+        attributes {
+            attribute(org.gradle.api.attributes.java.TargetJvmVersion.TARGET_JVM_VERSION_ATTRIBUTE, 25)
+        }
+    }
+}
+
+test {
+    def testCompilationClassPath = sourceSets["main"].output.classesDirs.files +
+            sourceSets["main"].runtimeClasspath.files +
+            sourceSets["test"].resources.srcDirs
+    systemProperty("test.compilation.classpath",
+            String.join(File.pathSeparator, testCompilationClassPath.collect { it.toString() }))
+}
+
+
+publishing {
+    publications {
+        maven(MavenPublication) {
+            from(components["java"])
+        }
+    }
+}

finalguard/finalguard-javac-plugin/src/main/java/net/woggioni/finalguard/FinalGuardPlugin.java

@@ -0,0 +1,311 @@
+package net.woggioni.finalguard;
+
+import com.sun.source.tree.AssignmentTree;
+import com.sun.source.tree.BlockTree;
+import com.sun.source.tree.CatchTree;
+import com.sun.source.tree.CompilationUnitTree;
+import com.sun.source.tree.CompoundAssignmentTree;
+import com.sun.source.tree.EnhancedForLoopTree;
+import com.sun.source.tree.ForLoopTree;
+import com.sun.source.tree.IdentifierTree;
+import com.sun.source.tree.LambdaExpressionTree;
+import com.sun.source.tree.MethodTree;
+import com.sun.source.tree.Tree;
+import com.sun.source.tree.TryTree;
+import com.sun.source.tree.UnaryTree;
+import com.sun.source.tree.VariableTree;
+import com.sun.source.util.JavacTask;
+import com.sun.source.util.Plugin;
+import com.sun.source.util.TaskEvent;
+import com.sun.source.util.TaskListener;
+import com.sun.source.util.TreePath;
+import com.sun.source.util.TreePathScanner;
+import com.sun.source.util.Trees;
+
+import javax.lang.model.element.Element;
+import javax.lang.model.element.ExecutableElement;
+import javax.lang.model.element.Modifier;
+import javax.tools.Diagnostic;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.AbstractMap;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+public class FinalGuardPlugin implements Plugin {
+    public static final String DEFAULT_LEVEL_KEY = "default.level";
+    public static final String EXCLUDE_KEY = "exclude";
+
+    enum VariableType {
+        LOCAL_VAR("local.variable.level"),
+        METHOD_PARAM("method.param.level"),
+        LOOP_PARAM("for.param.level"),
+        TRY_WITH_PARAM("try.param.level"),
+        CATCH_PARAM("catch.param.level"),
+        LAMBDA_PARAM("lambda.param.level"),
+        ABSTRACT_METHOD_PARAM("abstract.method.param.level");
+
+        private final String argKey;
+
+        VariableType(final String argKey) {
+                this.argKey = argKey;
+        }
+
+        public String getArgKey() {
+            return argKey;
+        }
+
+        public String getMessage(final String variableName) {
+            switch (this) {
+                case LOCAL_VAR:
+                    return "Local variable '" + variableName + "' is never reassigned, so it should be declared final";
+                case METHOD_PARAM:
+                    return "Method parameter '" + variableName + "' is never reassigned, so it should be declared final";
+                case LOOP_PARAM:
+                    return "Loop parameter '" + variableName + "' is never reassigned, so it should be declared final";
+                case TRY_WITH_PARAM:
+                    return "Try-with-resources parameter '" + variableName + "' is never reassigned, so it should be declared final";
+                case CATCH_PARAM:
+                    return "Catch parameter '" + variableName + "' is never reassigned, so it should be declared final";
+                case LAMBDA_PARAM:
+                    return "Lambda parameter '" + variableName + "' is never reassigned, so it should be declared final";
+                case ABSTRACT_METHOD_PARAM:
+                    return "Abstract method parameter '" + variableName + "' is never reassigned, so it should be declared final";
+                default:
+                    throw new UnsupportedOperationException();
+            }
+        }
+    }
+
+    private static class VariableInfo {
+        final VariableTree variableTree;
+        final VariableType variableType;
+        VariableInfo(VariableTree variableTree, VariableType variableType) {
+            this.variableTree = variableTree;
+            this.variableType = variableType;
+        }
+    }
+
+    private static final class Configuration {
+        private final Map<VariableType, Diagnostic.Kind> levels;
+        private final List<String> excludedPaths;
+
+        public Configuration(final String... args) {
+                final Map<String, String> props = new HashMap<>();
+                final List<String> excluded = new ArrayList<>();
+                for (final String arg : args) {
+                    final String[] parts = arg.split("=", 2);
+                    if (parts.length == 2) {
+                        if (EXCLUDE_KEY.equals(parts[0])) {
+                            final Path path = Paths.get(parts[1]);
+                            excluded.add(path.toAbsolutePath().toString());
+                        } else {
+                            props.put(parts[0], parts[1]);
+                        }
+                    }
+                }
+                this.excludedPaths = Collections.unmodifiableList(excluded);
+            final Diagnostic.Kind defaultLevel =
+                    Optional.ofNullable(props.get(DEFAULT_LEVEL_KEY)).map(Diagnostic.Kind::valueOf).orElse(null);
+            this.levels = Arrays.stream(VariableType.values()).map(vt -> {
+                final Diagnostic.Kind level = Optional.ofNullable(props.get(vt.getArgKey())).map(Diagnostic.Kind::valueOf).orElse(defaultLevel);
+                if (level != null) {
+                    return new AbstractMap.SimpleEntry<>(vt, level);
+                } else {
+                    return null;
+                }
+            }).filter(Objects::nonNull).collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
+        }
+
+        public boolean isExcluded(final String sourcePath) {
+            for (final String excludedPath : excludedPaths) {
+                if (sourcePath.startsWith(excludedPath)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+    }
+
+    private static boolean isJava17OrHigher() {
+        return System.getProperty("java.version").compareTo("17") >= 0;
+    }
+
+    private static final boolean isJava17OrHigher = isJava17OrHigher();
+
+    @Override
+    public String getName() {
+        return getClass().getName();
+    }
+
+    @Override
+    public void init(JavacTask task, String... args) {
+        final Configuration configuration = new Configuration(args);
+        task.addTaskListener(new TaskListener() {
+            @Override
+            public void started(TaskEvent e) {
+            }
+
+            @Override
+            public void finished(TaskEvent e) {
+                if (e.getKind() == TaskEvent.Kind.ANALYZE) {
+                    analyzeFinalVariables(e.getCompilationUnit(), task, e.getTypeElement(), configuration);
+                }
+            }
+        });
+    }
+
+    private void analyzeFinalVariables(CompilationUnitTree compilationUnit, JavacTask task, Element typeElement, Configuration configuration) {
+        final String sourcePath = compilationUnit.getSourceFile().toUri().getPath();
+        if (sourcePath != null && configuration.isExcluded(sourcePath)) {
+            return;
+        }
+        FinalVariableAnalyzer analyzer = new FinalVariableAnalyzer(compilationUnit, task, configuration);
+        TreePath path = Trees.instance(task).getPath(typeElement);
+        if (path != null) {
+            analyzer.scan(path, null);
+        }
+    }
+
+    private static class FinalVariableAnalyzer extends TreePathScanner<Void, Void> {
+        private final Configuration configuration;
+        private final CompilationUnitTree compilationUnit;
+        private final Trees trees;
+        private final Map<String, VariableInfo> variableInfoMap = new LinkedHashMap<>();
+        private final Set<String> reassignedVariables = new HashSet<>();
+
+        public FinalVariableAnalyzer(CompilationUnitTree compilationUnit, JavacTask task, Configuration configuration) {
+            this.configuration = configuration;
+            this.compilationUnit = compilationUnit;
+            this.trees = Trees.instance(task);
+        }
+
+        @Override
+        public Void visitMethod(MethodTree node, Void p) {
+            variableInfoMap.clear();
+            reassignedVariables.clear();
+            super.visitMethod(node, p);
+            // Check for variables that could be final
+            checkForFinalCandidates();
+            return null;
+        }
+
+        @Override
+        public Void visitVariable(VariableTree node, Void p) {
+            final String varName = node.getName().toString();
+            final TreePath currentPath = getCurrentPath();
+            final TreePath parentPath = currentPath.getParentPath();
+            final Tree parent = parentPath.getLeaf();
+            final VariableType type;
+
+            if (parent instanceof LambdaExpressionTree) {
+                type = VariableType.LAMBDA_PARAM;
+            } else if (parent instanceof ForLoopTree || parent instanceof EnhancedForLoopTree) {
+                type = VariableType.LOOP_PARAM;
+            } else if (parent instanceof CatchTree) {
+                type = VariableType.CATCH_PARAM;
+            } else if (parent instanceof TryTree) {
+                type = VariableType.TRY_WITH_PARAM;
+            } else if (parent instanceof MethodTree) {
+                if (isAbstractMethodParameter(node, (MethodTree) parent)) {
+                    type = VariableType.ABSTRACT_METHOD_PARAM;
+                } else {
+                    type = VariableType.METHOD_PARAM;
+                    if (isJava17OrHigher && ((MethodTree) parent).getName().contentEquals("<init>")) {
+                        final TreePath grandParentPath = parentPath.getParentPath();
+                        if (grandParentPath.getLeaf().getKind() == Tree.Kind.RECORD) {
+                            return super.visitVariable(node, p);
+                        }
+                    }
+                }
+            } else if (parent instanceof BlockTree) {
+                type = VariableType.LOCAL_VAR;
+            } else {
+                type = VariableType.LOCAL_VAR;
+            }
+
+            variableInfoMap.put(varName, new VariableInfo(node, type));
+            return super.visitVariable(node, p);
+        }
+
+        private boolean isAbstractMethodParameter(VariableTree variableTree, MethodTree methodTree) {
+            // Get the element for the method
+            Element methodElement = trees.getElement(getCurrentPath().getParentPath());
+            if (methodElement instanceof ExecutableElement) {
+                ExecutableElement executableElement = (ExecutableElement) methodElement;
+                return executableElement.getModifiers().contains(Modifier.ABSTRACT);
+            }
+            return false;
+        }
+
+        @Override
+        public Void visitAssignment(AssignmentTree node, Void p) {
+            if (node.getVariable() instanceof IdentifierTree) {
+                final IdentifierTree ident = (IdentifierTree) node.getVariable();
+                reassignedVariables.add(ident.getName().toString());
+            }
+            return super.visitAssignment(node, p);
+        }
+
+        @Override
+        public Void visitUnary(UnaryTree node, Void p) {
+            if ((node.getKind() == Tree.Kind.PREFIX_INCREMENT ||
+                    node.getKind() == Tree.Kind.PREFIX_DECREMENT ||
+                    node.getKind() == Tree.Kind.POSTFIX_INCREMENT ||
+                    node.getKind() == Tree.Kind.POSTFIX_DECREMENT) &&
+                    node.getExpression() instanceof IdentifierTree) {
+                IdentifierTree ident = (IdentifierTree) node.getExpression();
+                reassignedVariables.add(ident.getName().toString());
+            }
+            return super.visitUnary(node, p);
+        }
+
+        @Override
+        public Void visitCompoundAssignment(CompoundAssignmentTree node, Void p) {
+            if (node.getVariable() instanceof IdentifierTree) {
+                final IdentifierTree ident = (IdentifierTree) node.getVariable();
+                reassignedVariables.add(ident.getName().toString());
+            }
+            return super.visitCompoundAssignment(node, p);
+        }
+
+        private void checkForFinalCandidates() {
+            for (final Map.Entry<String, VariableInfo> entry : variableInfoMap.entrySet()) {
+                final String varName = entry.getKey();
+                final VariableInfo info = entry.getValue();
+                Diagnostic.Kind level = configuration.levels.get(info.variableType);
+                // Skip if level is not configured
+                if (level == null) {
+                    continue;
+                }
+                // Skip if already final
+                if (isFinal(info.variableTree)) {
+                    continue;
+                }
+                // Skip if reassigned
+                if (reassignedVariables.contains(varName)) {
+                    continue;
+                }
+                trees.printMessage(level,
+                        info.variableType.getMessage(varName),
+                        info.variableTree,
+                        compilationUnit);
+            }
+        }
+
+        private static boolean isFinal(VariableTree variableTree) {
+            final Set<Modifier> modifiers = variableTree.getModifiers().getFlags();
+            return modifiers.contains(Modifier.FINAL);
+        }
+    }
+}

finalguard/finalguard-javac-plugin/src/main/resources/META-INF/services/com.sun.source.util.Plugin

@@ -0,0 +1 @@
+net.woggioni.finalguard.FinalGuardPlugin

finalguard/finalguard-javac-plugin/src/test/java/net/woggioni/finalguard/PluginTest.java

@@ -0,0 +1,221 @@
+package net.woggioni.finalguard;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtensionContext;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.ArgumentsProvider;
+import org.junit.jupiter.params.provider.ArgumentsSource;
+
+import javax.tools.*;
+import java.io.*;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.*;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import java.util.stream.StreamSupport;
+
+import static net.woggioni.finalguard.FinalGuardPlugin.VariableType.*;
+
+public class PluginTest {
+
+    private static class ClassFile extends SimpleJavaFileObject {
+
+        private ByteArrayOutputStream out;
+
+        public ClassFile(URI uri) {
+            super(uri, Kind.CLASS);
+        }
+
+        @Override
+        public OutputStream openOutputStream() {
+            return out = new ByteArrayOutputStream();
+        }
+
+        public byte[] getCompiledBinaries() {
+            return out.toByteArray();
+        }
+    }
+
+    private static class SourceFile extends SimpleJavaFileObject {
+        public SourceFile(URI uri) {
+            super(uri, Kind.SOURCE);
+        }
+
+        @Override
+        public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {
+            Reader r = new InputStreamReader(uri.toURL().openStream());
+            StringBuilder sb = new StringBuilder();
+            char[] buffer = new char[0x1000];
+            while (true) {
+                int read = r.read(buffer);
+                if (read < 0) break;
+                sb.append(buffer, 0, read);
+            }
+            return sb.toString();
+        }
+    }
+
+    private static class FileManager extends ForwardingJavaFileManager<StandardJavaFileManager> {
+
+        private final List<ClassFile> compiled = new ArrayList<>();
+
+        protected FileManager(StandardJavaFileManager fileManager) {
+            super(fileManager);
+        }
+
+        @Override
+        public JavaFileObject getJavaFileForOutput(Location location,
+                                                   String className,
+                                                   JavaFileObject.Kind kind,
+                                                   FileObject sibling) {
+            ClassFile result = new ClassFile(URI.create("string://" + className));
+            compiled.add(result);
+            return result;
+        }
+
+        public List<ClassFile> getCompiled() {
+            return compiled;
+        }
+    }
+
+    private Optional<Iterable<Diagnostic<? extends JavaFileObject>>> compile(Iterable<URI> sources) {
+        return compile(sources, "");
+    }
+
+    private Optional<Iterable<Diagnostic<? extends JavaFileObject>>> compile(Iterable<URI> sources, String extraPluginArgs) {
+        StringWriter output = new StringWriter();
+        JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
+        FileManager fileManager =
+                new FileManager(compiler.getStandardFileManager(null, null, null));
+        List<JavaFileObject> compilationUnits = StreamSupport.stream(sources.spliterator(), false)
+                .map(SourceFile::new).collect(Collectors.toList());
+        String pluginArg = "-Xplugin:" + FinalGuardPlugin.class.getName() + " " + FinalGuardPlugin.DEFAULT_LEVEL_KEY + "=ERROR";
+        if (!extraPluginArgs.isEmpty()) {
+            pluginArg += " " + extraPluginArgs;
+        }
+        List<String> arguments = Arrays.asList(
+                "-classpath", System.getProperty("test.compilation.classpath"),
+                pluginArg
+        );
+        final ArrayList<Diagnostic<? extends JavaFileObject>> compilerMessages = new ArrayList<>();
+        JavaCompiler.CompilationTask task = compiler.getTask(
+                output,
+                fileManager,
+                compilerMessages::add,
+                arguments,
+                null,
+                compilationUnits
+        );
+        if (task.call()) return Optional.empty();
+        else return Optional.of(compilerMessages);
+    }
+
+    private enum CompilationResult {
+        SUCCESS, FAILURE
+    }
+
+    private static class TestCaseProvider implements ArgumentsProvider {
+        @Override
+        public Stream<? extends Arguments> provideArguments(ExtensionContext context) {
+            String prefix = "net/woggioni/finalguard/test/";
+            return Stream.of(
+                    Arguments.of(prefix + "TestCase1.java", Arrays.asList(
+                            LOOP_PARAM.getMessage("item"),
+                            LAMBDA_PARAM.getMessage("s"),
+                            LOCAL_VAR.getMessage("f"),
+                            LOCAL_VAR.getMessage("localVar"),
+                            LOCAL_VAR.getMessage("loopVar"),
+                            LOOP_PARAM.getMessage("i"),
+                            TRY_WITH_PARAM.getMessage("is"),
+                            METHOD_PARAM.getMessage("param1"),
+                            CATCH_PARAM.getMessage("ioe"),
+                            LOCAL_VAR.getMessage("anotherVar"),
+                            METHOD_PARAM.getMessage("param2")
+                    )),
+                    Arguments.of(prefix + "TestCase2.java", Collections.emptyList()),
+                    Arguments.of(prefix + "TestCase3.java",
+                            Arrays.asList(LOCAL_VAR.getMessage("n"))),
+                    Arguments.of(prefix + "TestCase4.java",
+                            Arrays.asList(LOOP_PARAM.getMessage("i"))),
+                    Arguments.of(prefix + "TestCase5.java", Arrays.asList(LOCAL_VAR.getMessage("loopVar"))),
+                    Arguments.of(prefix + "TestCase6.java", Arrays.asList(LOOP_PARAM.getMessage("item"))),
+                    Arguments.of(prefix + "TestCase7.java", Arrays.asList(CATCH_PARAM.getMessage("re"))),
+                    Arguments.of(prefix + "TestCase8.java", Arrays.asList(TRY_WITH_PARAM.getMessage("is"))),
+                    Arguments.of(prefix + "TestCase9.java", Arrays.asList(LAMBDA_PARAM.getMessage("s"))),
+                    Arguments.of(prefix + "TestCase10.java", Arrays.asList(METHOD_PARAM.getMessage("n"))),
+                    Arguments.of(prefix + "TestCase11.java", Arrays.asList(
+                            ABSTRACT_METHOD_PARAM.getMessage("n"),
+                            LOCAL_VAR.getMessage("result"),
+                            LOCAL_VAR.getMessage("size"),
+                            METHOD_PARAM.getMessage("t1s")
+                    )),
+                    Arguments.of(prefix + "TestCase12.java", Collections.emptyList()),
+                    Arguments.of(prefix + "TestCase13.java", Arrays.asList(ABSTRACT_METHOD_PARAM.getMessage("x"), ABSTRACT_METHOD_PARAM.getMessage("y"))),
+                    Arguments.of(prefix + "TestCase14.java", Arrays.asList(ABSTRACT_METHOD_PARAM.getMessage("x"), ABSTRACT_METHOD_PARAM.getMessage("y"))),
+                    Arguments.of(prefix + "TestCase15.java",
+                            Arrays.asList(
+                                    LOCAL_VAR.getMessage("a"),
+                                    METHOD_PARAM.getMessage("source")))
+            );
+        }
+    }
+
+    @ParameterizedTest(name = "{0}")
+    @ArgumentsSource(TestCaseProvider.class)
+    public void test(String sourceFilePath, List<String> expectedErrorMessages) {
+        Optional<Iterable<Diagnostic<? extends JavaFileObject>>> result;
+        try {
+            ClassLoader cl = getClass().getClassLoader();
+            result = compile(Collections.singletonList(cl.getResource(sourceFilePath).toURI()));
+        } catch (URISyntaxException e) {
+            throw new RuntimeException(e);
+        }
+        result.ifPresent(diagnostics -> {
+            for (Diagnostic<? extends JavaFileObject> diagnostic : diagnostics) {
+                System.err.printf("%s:%s %s\n",
+                        diagnostic.getSource().getName(),
+                        diagnostic.getLineNumber(),
+                        diagnostic.getMessage(Locale.getDefault()));
+            }
+        });
+        if (expectedErrorMessages.isEmpty()) {
+            Assertions.assertFalse(result.isPresent(), "Compilation was expected to succeed but it has failed");
+        } else {
+            final List<String> compilationErrors = result
+                    .map(it -> StreamSupport.stream(it.spliterator(), false))
+                    .orElse(Stream.empty())
+                    .map(it -> it.getMessage(Locale.ENGLISH))
+                    .collect(Collectors.toList());
+            for (String expectedErrorMessage : expectedErrorMessages) {
+                int index = compilationErrors.indexOf(expectedErrorMessage);
+                Assertions.assertTrue(index >= 0, String.format("Expected compilation error `%s` not found in output", expectedErrorMessage));
+                compilationErrors.remove(index);
+            }
+            Assertions.assertTrue(compilationErrors.isEmpty(), "Unexpected compilation errors found in the output");
+        }
+    }
+
+    @Test
+    public void testExcludedSourceIsSkipped() throws Exception {
+        // TestCase3 normally produces an error (local var 'n' not final).
+        // When we exclude the directory containing TestCase3, it should compile without errors.
+        ClassLoader cl = getClass().getClassLoader();
+        URI sourceUri = cl.getResource("net/woggioni/finalguard/test/TestCase3.java").toURI();
+        String sourcePath = new File(sourceUri).getParent();
+
+        // Compile WITH exclude — should succeed (no errors)
+        Optional<Iterable<Diagnostic<? extends JavaFileObject>>> resultWithExclude =
+                compile(Collections.singletonList(sourceUri), FinalGuardPlugin.EXCLUDE_KEY + "=" + sourcePath);
+        Assertions.assertFalse(resultWithExclude.isPresent(),
+                "Compilation should succeed when source directory is excluded");
+
+        // Compile WITHOUT exclude — should fail (TestCase3 has errors)
+        Optional<Iterable<Diagnostic<? extends JavaFileObject>>> resultWithoutExclude =
+                compile(Collections.singletonList(sourceUri));
+        Assertions.assertTrue(resultWithoutExclude.isPresent(),
+                "Compilation should fail when source directory is NOT excluded");
+    }
+}

finalguard/finalguard-javac-plugin/src/test/resources/net/woggioni/finalguard/test/TestCase1.java

@@ -0,0 +1,40 @@
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.UncheckedIOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Arrays;
+import java.util.function.Function;
+
+public class TestCase1 {
+
+    public void testMethod(String param1, String param2) {  // Warning: param1 could be final
+        String localVar = "hello";  // Warning: localVar could be final
+        String reassignedVar = "initial";  // No warning (reassigned below)
+        reassignedVar = "changed";
+
+        param2 = "modified";  // No warning for param2 (reassigned)
+
+        for (int i = 0; i < 10; ) {  // Warning: i could be final
+            String loopVar = "constant";  // Warning: loopVar could be final
+        }
+
+        // Enhanced for loop - no warning for loop variable
+        for (String item : Arrays.asList("a", "b")) {
+            // item is effectively final in each iteration
+        }
+
+        try (InputStream is = Files.newInputStream(Path.of("/tmp/file.txt"))) {
+
+        } catch (IOException ioe) {
+            throw new UncheckedIOException(ioe);
+        }
+
+        Function<String, String> f = s -> s.toLowerCase();
+    }
+
+    public void finalMethod(final String param1, String param2) {  // Warning only for param2
+        final String localVar = "hello";  // No warning (already final)
+        String anotherVar = "world";  // Warning: anotherVar could be final
+    }
+}

finalguard/finalguard-javac-plugin/src/test/resources/net/woggioni/finalguard/test/TestCase10.java

@@ -0,0 +1,5 @@
+public class TestCase10 {
+    public void testMethod(int n) {
+
+    }
+}

finalguard/finalguard-javac-plugin/src/test/resources/net/woggioni/finalguard/test/TestCase11.java

@@ -0,0 +1,15 @@
+import java.util.Arrays;
+
+public abstract class TestCase11<T1> {
+
+    abstract T1 get(int n);
+
+    public T1[] toArray(T1[] t1s) {
+        int size = 42;
+        T1[] result = Arrays.copyOf(t1s, size);
+        for (int i = 0; i < size; i++) {
+            result[i] = get(i);
+        }
+        return result;
+    }
+}

finalguard/finalguard-javac-plugin/src/test/resources/net/woggioni/finalguard/test/TestCase12.java

@@ -0,0 +1,2 @@
+public record TestCase12<T, U>(double x, double y) {
+}

finalguard/finalguard-javac-plugin/src/test/resources/net/woggioni/finalguard/test/TestCase13.java

@@ -0,0 +1,3 @@
+public interface TestCase13 {
+    void foo(double x, double y);
+}

finalguard/finalguard-javac-plugin/src/test/resources/net/woggioni/finalguard/test/TestCase14.java

@@ -0,0 +1,3 @@
+public abstract class TestCase14 {
+    abstract public void foo(double x, double y);
+}

finalguard/finalguard-javac-plugin/src/test/resources/net/woggioni/finalguard/test/TestCase15.java

@@ -0,0 +1,24 @@
+import java.io.FilterInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+public class TestCase15 {
+    public static void foo() {
+        final InputStream source = null;
+        final InputStream is = new FilterInputStream(source) {
+
+            @Override
+            public int read() throws IOException {
+                int a = 5;
+                return a;
+            }
+        };
+    }
+
+    static class Bar extends FilterInputStream {
+
+        public Bar(InputStream source) {
+            super(source);
+        }
+    };
+}

finalguard/finalguard-javac-plugin/src/test/resources/net/woggioni/finalguard/test/TestCase2.java

@@ -0,0 +1,18 @@
+public class TestCase2 {
+
+    public void testMethod(int a, int b, int c, int d, int e, int f, int g, int h, int j, int k, int l, int m, int n) {
+        a++;
+        b--;
+        ++c;
+        --d;
+        e |= 2;
+        f &= 1;
+        g <<= 1;
+        h >>= 1;
+        j ^= 1;
+        k += 1;
+        l -= 1;
+        m *= 1;
+        n /= 1;
+    }
+}

finalguard/finalguard-javac-plugin/src/test/resources/net/woggioni/finalguard/test/TestCase3.java

@@ -0,0 +1,6 @@
+public class TestCase3 {
+
+    public void testMethod() {
+        int n = 5; // Error: n could be final
+    }
+}

finalguard/finalguard-javac-plugin/src/test/resources/net/woggioni/finalguard/test/TestCase4.java

@@ -0,0 +1,7 @@
+public class TestCase4 {
+
+    public void testMethod() {
+        for (int i = 0; i < 10; ) {  // Error: i could be final
+        }
+    }
+}

finalguard/finalguard-javac-plugin/src/test/resources/net/woggioni/finalguard/test/TestCase5.java

@@ -0,0 +1,8 @@
+public class TestCase5 {
+
+    public void testMethod() {
+        for (int i = 0; i < 10; i++) {
+            String loopVar = "constant";  // Error: loopVar should be final
+        }
+    }
+}

finalguard/finalguard-javac-plugin/src/test/resources/net/woggioni/finalguard/test/TestCase6.java

@@ -0,0 +1,9 @@
+import java.util.Arrays;
+
+public class TestCase6 {
+
+    public void testMethod() {
+        for (String item : Arrays.asList("a", "b")) { // Error: item should be final
+        }
+    }
+}

finalguard/finalguard-javac-plugin/src/test/resources/net/woggioni/finalguard/test/TestCase7.java

@@ -0,0 +1,10 @@
+public class TestCase7 {
+
+    public void testMethod() {
+        try {
+
+        } catch (RuntimeException re) { // Error: re should be final
+
+        }
+    }
+}

finalguard/finalguard-javac-plugin/src/test/resources/net/woggioni/finalguard/test/TestCase8.java

@@ -0,0 +1,13 @@
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+public class TestCase8 {
+
+    public void testMethod() throws IOException {
+        try (InputStream is = Files.newInputStream(Path.of("some-path"))) { // Error: is could be final
+
+        }
+    }
+}

finalguard/finalguard-javac-plugin/src/test/resources/net/woggioni/finalguard/test/TestCase9.java

@@ -0,0 +1,8 @@
+import java.util.function.Function;
+
+public class TestCase9 {
+
+    public void testMethod() {
+        final Function<String, String> d = s -> s.toLowerCase();
+    }
+}

finalguard/src/main/java/net/woggioni/gradle/finalguard/FinalGuardExtension.java

@@ -0,0 +1,29 @@
+package net.woggioni.gradle.finalguard;
+
+import org.gradle.api.provider.ListProperty;
+import org.gradle.api.provider.Property;
+
+import javax.tools.Diagnostic;
+
+
+public interface FinalGuardExtension {
+    Property<Diagnostic.Kind> getDefaultLevel();
+
+    Property<Diagnostic.Kind> getLocalVariableLevel();
+
+    Property<Diagnostic.Kind> getLambdaParameterLevel();
+
+    Property<Diagnostic.Kind> getForLoopParameterLevel();
+
+    Property<Diagnostic.Kind> getTryWithResourceLevel();
+
+    Property<Diagnostic.Kind> getMethodParameterLevel();
+
+    Property<Diagnostic.Kind> getAbstractMethodParameterLevel();
+
+    Property<Diagnostic.Kind> getCatchParameterLevel();
+
+    Property<Boolean> getSkipGeneratedSources();
+
+    ListProperty<String> getExcludedPrefixes();
+}

finalguard/src/main/java/net/woggioni/gradle/finalguard/FinalGuardPlugin.java

@@ -0,0 +1,92 @@
+package net.woggioni.gradle.finalguard;
+
+import lombok.SneakyThrows;
+import org.gradle.api.Action;
+import org.gradle.api.Plugin;
+import org.gradle.api.Project;
+import org.gradle.api.artifacts.Configuration;
+import org.gradle.api.artifacts.DependencySet;
+import org.gradle.api.model.ObjectFactory;
+import org.gradle.api.plugins.ExtensionContainer;
+import org.gradle.api.provider.Property;
+import org.gradle.api.tasks.TaskContainer;
+import org.gradle.api.tasks.compile.CompileOptions;
+import org.gradle.api.tasks.compile.JavaCompile;
+
+import javax.tools.Diagnostic;
+import java.io.File;
+import java.net.URL;
+import java.util.jar.Attributes;
+import java.util.jar.Manifest;
+
+public class FinalGuardPlugin implements Plugin<Project> {
+    private static final String FINALGUARD_PLUGIN_CONFIGURATION = "finalguard_plugin";
+    private static final String JAVAC_PLUGIN_NAME = "net.woggioni.finalguard.FinalGuardPlugin";
+    private static final String EXCLUDE_KEY = "exclude";
+
+    @Override
+    public void apply(final Project project) {
+        final ExtensionContainer extensionContainer = project.getExtensions();
+        final TaskContainer tasks = project.getTasks();
+        final ObjectFactory objects = project.getObjects();
+
+        Configuration javacPluginConfiguration = project.getConfigurations().create(FINALGUARD_PLUGIN_CONFIGURATION);
+        javacPluginConfiguration.withDependencies(new Action<DependencySet>() {
+            @Override
+            @SneakyThrows
+            public void execute(DependencySet dependencies) {
+                final Class<?> cls = getClass();
+                final String resourceName = cls.getName().replace('.', '/') + ".class";
+                final URL classUrl = cls.getClassLoader().getResource(resourceName);
+                if (classUrl.getProtocol().startsWith("jar")) {
+                    final String path = classUrl.toString();
+                    String manifestPath = path.substring(0, path.lastIndexOf("!") + 1) +
+                            "/META-INF/MANIFEST.MF";
+                    final Manifest manifest = new Manifest(new URL(manifestPath).openStream());
+                    final Attributes attr = manifest.getMainAttributes();
+                    final String version = attr.getValue(Attributes.Name.SPECIFICATION_VERSION);
+                    dependencies.add(project.getDependencies().create("net.woggioni.finalguard:finalguard-javac-plugin:" + version));
+                }
+            }
+        });
+
+        final FinalGuardExtension finalGuardExtension = objects.newInstance(FinalGuardExtension.class);
+        finalGuardExtension.getSkipGeneratedSources().convention(true);
+        extensionContainer.add("finalguard", finalGuardExtension);
+        tasks.withType(JavaCompile.class, javaCompileTask -> {
+            javaCompileTask.doFirst(t -> {
+                final CompileOptions options = javaCompileTask.getOptions();
+                options.setAnnotationProcessorPath(options.getAnnotationProcessorPath().plus(javacPluginConfiguration));
+                final StringBuilder xpluginArg = new StringBuilder("-Xplugin:").append(JAVAC_PLUGIN_NAME);
+                appendOption(xpluginArg, "default.level", finalGuardExtension.getDefaultLevel());
+                appendOption(xpluginArg, "local.variable.level", finalGuardExtension.getLocalVariableLevel());
+                appendOption(xpluginArg, "method.param.level", finalGuardExtension.getMethodParameterLevel());
+                appendOption(xpluginArg, "abstract.method.param.level", finalGuardExtension.getAbstractMethodParameterLevel());
+                appendOption(xpluginArg, "for.param.level", finalGuardExtension.getForLoopParameterLevel());
+                appendOption(xpluginArg, "try.param.level", finalGuardExtension.getTryWithResourceLevel());
+                appendOption(xpluginArg, "catch.param.level", finalGuardExtension.getCatchParameterLevel());
+                appendOption(xpluginArg, "lambda.param.level", finalGuardExtension.getLambdaParameterLevel());
+                if (finalGuardExtension.getSkipGeneratedSources().getOrElse(true)) {
+                    final File generatedSourceDir = project.getLayout().getBuildDirectory().getAsFile().get();
+                    if (generatedSourceDir != null) {
+                        appendOption(xpluginArg, EXCLUDE_KEY, generatedSourceDir.getAbsolutePath());
+                    }
+                }
+                for(final String excludedPrefix : finalGuardExtension.getExcludedPrefixes().get()) {
+                    appendOption(xpluginArg, EXCLUDE_KEY, excludedPrefix);
+                }
+                options.getCompilerArgs().add(xpluginArg.toString());
+            });
+        });
+    }
+
+    private static void appendOption(StringBuilder sb, String key, String value) {
+            sb.append(' ').append(key).append('=').append(value);
+    }
+
+    private static void appendOption(StringBuilder sb, String key, Property<Diagnostic.Kind> property) {
+        if (property.isPresent()) {
+            appendOption(sb, key, property.get().toString());
+        }
+    }
+}

graalvm/README.md

@@ -0,0 +1,132 @@
+## Overview
+This project contains 2 Gradle plugin:
+- NativeImage allows you to create a native executable file from a Gradle project using GraalVM's `native-image` tool
+- Jlink allows you to create a native distribution of a Gradle project using GraalVM `jlink` tool
+
+### Native Image plugin
+
+Declare the plugin in your build's `settings.gradle` like this
+```groovy
+
+pluginManagement {
+    repositories {
+        maven {
+            url = 'https://woggioni.net/mvn/'
+        }
+    }
+
+    plugins {
+        id "net.woggioni.gradle.graalvm.native-image" version "2023.10.23"
+    }
+}
+```
+
+Then add it to a project's `build.gradle`
+
+```groovy
+plugins {
+    id 'net.woggioni.gradle.graalvm.native-image'
+}
+
+configureNativeImage {
+    args = [ 'your', 'command', 'line', 'arguments']
+}
+
+application {
+    mainClass = 'your.main.Class'
+}
+```
+Mind that if your project also uses the built-in Gradle `application` plugin, that must be applied before the `net.woggioni.gradle.graalvm.native-image`.
+
+The plugin adds 2 tasks to your project:
+
+- `configureNativeImage` of type `net.woggioni.gradle.graalvm.NativeImageConfigurationTask` which launches 
+   your application with the [native-image-agent](https://www.graalvm.org/latest/reference-manual/native-image/metadata/AutomaticMetadataCollection/)
+   to generate the native image configuration files in `${project.projectDir}/native-image`
+- `nativeImage` of type `net.woggioni.gradle.graalvm.NativeImageTask` that creates the native executable the project's 
+   libraries folder (`${project.buildDir}/libs`)
+
+#### Configuration for `NativeImageConfigurationTask`
+
+###### mergeConfiguration
+
+This boolean property decides whether to create a new set of configuration files or simply append to the existing ones
+
+#### Configuration for `NativeImageTask`
+
+###### mainClass
+
+The name of the main class the native executable will launch, defaults to the value set in
+
+```groovy
+application {
+    mainClass = 'my.main.class'
+}
+```
+
+###### mainModule
+
+The name of the main JPMS module the native executable will launch, defaults to the value set in
+
+```groovy
+application {
+    mainModule = 'my.main.module'
+}
+```
+
+Only applicable when `useJpms` is true
+
+###### useJpms
+
+Whether or not enable JPMS in the generated executable 
+(dependencies that support JPMS will be forwarded to `native-image` using the `-p` instead of the `-cp` option)
+
+###### useMusl
+
+This boolean property allows to link the generated executable to musl libc, 
+note that in order to do that a valid (linked to musl-libc) compiler toolchain must be available
+on the `PATH`, for example if building x86_64 executables on Linux, GraalVM will look for 
+`x86_64-linux-musl-gcc`
+
+###### buildStaticImage
+
+This boolean property allows to create a statically linked executable for maximum portability
+(a static executable only depends on the kernel and can be moved freely to
+another different machine with the same operating system and CPU architecture).
+Beware that this requires the libc to support static linking 
+(most notably, the glibc does not support static linking, the only way to build static executables 
+on linux is to link to a different libc implementation like musl libc).
+
+###### enableFallback
+
+Whether or not to allow the creation of the [fallback image](https://www.graalvm.org/22.0/reference-manual/native-image/Limitations/)
+when native-image configuration is missing.
+
+###### graalVmHome
+
+This points to the installation folder of GraalVM, defaults to the installation directory
+of the selected Gradle toolchain (if any) or the installation directory
+of the JVM Gradle is running on otherwise.
+
+#### Customize native-image command line
+A [native-image.properties](https://www.graalvm.org/22.0/reference-manual/native-image/BuildConfiguration/) 
+file can be added to `${project.projectDir}/native-image` to add custom parameters:
+
+```bash
+-H:Optimize=3 --initialize-at-run-time=your.main.class --gc=G1
+```
+
+#### Limitations
+
+GraalVM with the [native-image](https://www.graalvm.org/22.0/reference-manual/native-image/) plugin is required in order
+for these plugins to work, this can be achieved either running Gradle under GraalVM directly or using Gradle toolchains
+support to request GraalVM at the project level
+
+```groovy
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(17)
+        vendor = JvmVendorSpec.GRAAL_VM
+    }
+}
+```

graalvm/build.gradle

@@ -0,0 +1,20 @@
+plugins {
+    id 'java-gradle-plugin'
+}
+
+
+gradlePlugin {
+    plugins {
+        create("NativeImagePlugin") {
+            id = 'net.woggioni.gradle.graalvm.native-image'
+            implementationClass = "net.woggioni.gradle.graalvm.NativeImagePlugin"
+        }
+    }
+
+    plugins {
+        create("JlinkPlugin") {
+            id = 'net.woggioni.gradle.graalvm.jlink'
+            implementationClass = "net.woggioni.gradle.graalvm.JlinkPlugin"
+        }
+    }
+}

graalvm/src/main/java/net/woggioni/gradle/graalvm/Constants.java

@@ -0,0 +1,5 @@
+package net.woggioni.gradle.graalvm;
+
+public class Constants {
+    public static final String GRAALVM_TASK_GROUP = "graalvm";
+}

graalvm/src/main/java/net/woggioni/gradle/graalvm/DefaultNativeImageExtension.java

@@ -0,0 +1,22 @@
+package net.woggioni.gradle.graalvm;
+
+import org.gradle.api.Action;
+import org.gradle.api.model.ObjectFactory;
+import org.gradle.jvm.toolchain.JavaToolchainSpec;
+
+import javax.inject.Inject;
+
+
+abstract class DefaultNativeImageExtension implements NativeImageExtension {
+
+    @Inject
+    public DefaultNativeImageExtension(ObjectFactory objects) {
+    }
+
+    @Override
+    public JavaToolchainSpec toolchain(Action<? super JavaToolchainSpec> action) {
+        JavaToolchainSpec jts = getToolchain();
+        action.execute(getToolchain());
+        return jts;
+    }
+}

graalvm/src/main/java/net/woggioni/gradle/graalvm/JlinkPlugin.java

@@ -0,0 +1,63 @@
+package net.woggioni.gradle.graalvm;
+
+import org.gradle.api.Plugin;
+import org.gradle.api.Project;
+import org.gradle.api.artifacts.ConfigurationContainer;
+import org.gradle.api.file.FileCollection;
+import org.gradle.api.plugins.BasePluginExtension;
+import org.gradle.api.plugins.ExtensionContainer;
+import org.gradle.api.plugins.JavaApplication;
+import org.gradle.api.plugins.JavaLibraryPlugin;
+import org.gradle.api.plugins.JavaPlugin;
+import org.gradle.api.provider.Provider;
+import org.gradle.api.tasks.TaskContainer;
+import org.gradle.api.tasks.bundling.Tar;
+import org.gradle.api.tasks.bundling.Zip;
+
+import java.util.Optional;
+
+public class JlinkPlugin implements Plugin<Project> {
+
+    public static final String JLINK_TASK_NAME = "jlink";
+    public static final String JLINK_DIST_ZIP_TASK_NAME = "jlinkDistZip";
+    public static final String JLINK_DIST_TAR_TASK_NAME = "jlinkDistTar";
+
+    @Override
+    public void apply(Project project) {
+        project.getPluginManager().apply(JavaLibraryPlugin.class);
+        ExtensionContainer extensionContainer = project.getExtensions();
+        BasePluginExtension basePluginExtension = extensionContainer.getByType(BasePluginExtension.class);
+
+        TaskContainer tasks = project.getTasks();
+        Provider<JlinkTask> jlinTaskProvider = tasks.register(JLINK_TASK_NAME, JlinkTask.class, jlinkTask -> {
+            ConfigurationContainer configurations = project.getConfigurations();
+            FileCollection classpath = project.files(tasks.named(JavaPlugin.JAR_TASK_NAME),
+                    configurations.getByName(JavaPlugin.RUNTIME_CLASSPATH_CONFIGURATION_NAME));
+            jlinkTask.getClasspath().set(classpath);
+        });
+
+        Provider<Zip> jlinkZipTaskProvider = tasks.register(JLINK_DIST_ZIP_TASK_NAME, Zip.class, zip -> {
+            zip.getArchiveBaseName().set(project.getName());
+            if(project.getVersion() != null) {
+                zip.getArchiveVersion().set(project.getVersion().toString());
+            }
+            zip.getDestinationDirectory().set(basePluginExtension.getDistsDirectory());
+            zip.from(jlinTaskProvider);
+        });
+
+        Provider<Tar> jlinkTarTaskProvider = tasks.register(JLINK_DIST_TAR_TASK_NAME, Tar.class, zip -> {
+            zip.getArchiveBaseName().set(project.getName());
+            if(project.getVersion() != null) {
+                zip.getArchiveVersion().set(project.getVersion().toString());
+            }
+            zip.getDestinationDirectory().set(basePluginExtension.getDistsDirectory());
+            zip.from(jlinTaskProvider);
+        });
+
+
+        tasks.named(JLINK_TASK_NAME, JlinkTask.class, jlinkTask -> {
+            jlinkTask.finalizedBy(jlinkZipTaskProvider);
+            jlinkTask.finalizedBy(jlinkTarTaskProvider);
+        });
+    }
+}

graalvm/src/main/java/net/woggioni/gradle/graalvm/JlinkTask.java

@@ -0,0 +1,234 @@
+package net.woggioni.gradle.graalvm;
+
+import lombok.SneakyThrows;
+import org.gradle.api.Action;
+import org.gradle.api.Project;
+import org.gradle.api.file.Directory;
+import org.gradle.api.file.DirectoryProperty;
+import org.gradle.api.file.FileCollection;
+import org.gradle.api.file.ProjectLayout;
+import org.gradle.api.logging.Logger;
+import org.gradle.api.logging.Logging;
+import org.gradle.api.model.ObjectFactory;
+import org.gradle.api.plugins.BasePluginExtension;
+import org.gradle.api.plugins.ExtensionContainer;
+import org.gradle.api.plugins.JavaApplication;
+import org.gradle.api.plugins.JavaPluginExtension;
+import org.gradle.api.provider.ListProperty;
+import org.gradle.api.provider.Property;
+import org.gradle.api.provider.Provider;
+import org.gradle.api.tasks.Classpath;
+import org.gradle.api.tasks.Exec;
+import org.gradle.api.tasks.Input;
+import org.gradle.api.tasks.InputDirectory;
+import org.gradle.api.tasks.Optional;
+import org.gradle.api.tasks.OutputDirectory;
+import org.gradle.internal.jvm.JavaModuleDetector;
+import org.gradle.jvm.toolchain.JavaInstallationMetadata;
+import org.gradle.jvm.toolchain.JavaLauncher;
+import org.gradle.jvm.toolchain.JavaToolchainService;
+import org.gradle.jvm.toolchain.JavaToolchainSpec;
+import org.gradle.jvm.toolchain.internal.DefaultToolchainSpec;
+import org.gradle.process.CommandLineArgumentProvider;
+
+import javax.inject.Inject;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Objects;
+import java.util.function.Consumer;
+
+import static java.util.Optional.ofNullable;
+import static net.woggioni.gradle.graalvm.Constants.GRAALVM_TASK_GROUP;
+
+public abstract class JlinkTask extends Exec {
+
+    private final JavaToolchainSpec toolchain;
+
+    public JavaToolchainSpec toolchain(Action<? super JavaToolchainSpec> action) {
+        action.execute(toolchain);
+        return toolchain;
+    }
+
+    @Classpath
+    public abstract Property<FileCollection> getClasspath();
+
+    @InputDirectory
+    public abstract DirectoryProperty getGraalVmHome();
+
+    @Input
+    @Optional
+    public abstract Property<String> getMainClass();
+
+    @Input
+    @Optional
+    public abstract Property<String> getMainModule();
+
+    @Input
+    public abstract ListProperty<String> getAdditionalModules();
+
+    @Input
+    public abstract ListProperty<String> getLimitModules();
+
+    @Input
+    public abstract Property<Boolean> getBindServices();
+
+    @Input
+    public abstract Property<Boolean> getIncludeHeaderFiles();
+
+    @Input
+    public abstract Property<Boolean> getIncludeManPages();
+
+    @Input
+    public abstract Property<Boolean> getStripDebug();
+
+    @Input
+    public abstract Property<Boolean> getGenerateCdsArchive();
+
+    @Input
+    @Optional
+    public abstract Property<Integer> getCompressionLevel();
+
+    @Inject
+    protected abstract JavaModuleDetector getJavaModuleDetector();
+
+    @OutputDirectory
+    public abstract DirectoryProperty getOutputDir();
+
+    private static final Logger log = Logging.getLogger(JlinkTask.class);
+
+    @Inject
+    public JlinkTask(ObjectFactory objects) {
+        Project project = getProject();
+        setGroup(GRAALVM_TASK_GROUP);
+        setDescription(
+            "Generates a custom Java runtime image that contains only the platform modules" +
+                " that are required for a given application");
+        ExtensionContainer ext = project.getExtensions();
+        JavaApplication javaApplication = ext.findByType(JavaApplication.class);
+        if(!Objects.isNull(javaApplication)) {
+            getMainClass().convention(javaApplication.getMainClass());
+            getMainModule().convention(javaApplication.getMainModule());
+        }
+        getIncludeManPages().convention(false);
+        getIncludeHeaderFiles().convention(false);
+        getGenerateCdsArchive().convention(true);
+        getStripDebug().convention(true);
+        getClasspath().convention(project.files());
+        ProjectLayout layout = project.getLayout();
+        toolchain = getObjectFactory().newInstance(DefaultToolchainSpec.class);
+        JavaToolchainService javaToolchainService = ext.findByType(JavaToolchainService.class);
+        Provider<Directory> graalHomeDirectoryProvider = javaToolchainService.launcherFor(it -> {
+            it.getLanguageVersion().set(toolchain.getLanguageVersion());
+            it.getVendor().set(toolchain.getVendor());
+            it.getImplementation().set(toolchain.getImplementation());
+        }).map(javaLauncher ->
+                javaLauncher.getMetadata().getInstallationPath()
+        ).orElse(layout.dir(project.provider(() -> project.file(System.getProperty("java.home")))));
+        getGraalVmHome().convention(graalHomeDirectoryProvider);
+
+        getGraalVmHome().convention(graalHomeDirectoryProvider);
+        getAdditionalModules().convention(new ArrayList<>());
+        getLimitModules().convention(new ArrayList<>());
+        getBindServices().convention(false);
+
+        BasePluginExtension basePluginExtension =
+                ext.getByType(BasePluginExtension.class);
+        getOutputDir().convention(
+            basePluginExtension.getLibsDirectory()
+                .dir(project.getName() +
+                    ofNullable(project.getVersion()).map(it -> "-" + it).orElse(""))
+        );
+        Object executableProvider = new Object() {
+            @Override
+            public String toString() {
+                return getGraalVmHome().get() + "/bin/jlink";
+            }
+        };
+        executable(executableProvider);
+        CommandLineArgumentProvider argumentProvider = new CommandLineArgumentProvider() {
+            @Override
+            @SneakyThrows
+            public Iterable<String> asArguments() {
+                List<String> result = new ArrayList<>();
+                final Property<Integer> compressionLevelProperty = getCompressionLevel();
+                if(compressionLevelProperty.isPresent()) {
+                    result.add(String.format("--compress=zip-%d", compressionLevelProperty.get()));
+                }
+                if(getBindServices().get()) {
+                    result.add("--bind-services");
+                }
+                JavaModuleDetector javaModuleDetector = getJavaModuleDetector();
+                FileCollection classpath = getClasspath().get();
+                FileCollection mp = javaModuleDetector.inferModulePath(true, classpath);
+                if(!mp.isEmpty()) {
+                    result.add("-p");
+                    result.add(mp.getAsPath());
+                }
+
+                if(getMainModule().isPresent()) {
+                    result.add("--launcher");
+                    String launcherArg = project.getName() + '=' +
+                            getMainModule().get() +
+                            ofNullable(getMainClass().getOrElse(null)).map(it -> '/' + it).orElse("");
+                    result.add(launcherArg);
+                }
+                result.add("--output");
+                result.add(getOutputDir().get().getAsFile().toString());
+                List<String> additionalModules = getAdditionalModules().get();
+                if(getMainModule().isPresent() || !additionalModules.isEmpty()) {
+                    result.add("--add-modules");
+                    final List<String> modules2BeAdded = new ArrayList<>();
+                    ofNullable(getMainModule().getOrElse(null)).ifPresent(modules2BeAdded::add);
+                    modules2BeAdded.addAll(additionalModules);
+                    if(!modules2BeAdded.isEmpty()) {
+                        result.add(String.join(",", modules2BeAdded));
+                    }
+                }
+                List<String> limitModules = getLimitModules().get();
+                if(!limitModules.isEmpty()) {
+                    result.add("--limit-modules");
+                    final List<String> modules2BeAdded = new ArrayList<>();
+                    modules2BeAdded.addAll(limitModules);
+                    if(!modules2BeAdded.isEmpty()) {
+                        result.add(String.join(",", modules2BeAdded));
+                    }
+                }
+
+                if(getStripDebug().getOrElse(false)) {
+                    result.add("--strip-debug");
+                }
+                if(getGenerateCdsArchive().getOrElse(false)) {
+                    result.add("--generate-cds-archive");
+                }
+                if(!getIncludeHeaderFiles().getOrElse(true)) {
+                    result.add("--no-header-files");
+                }
+                if(!getIncludeManPages().getOrElse(true)) {
+                    result.add("--no-man-pages");
+                }
+                return Collections.unmodifiableList(result);
+            }
+        };
+        getArgumentProviders().add(argumentProvider);
+
+    }
+
+    @Override
+    @SneakyThrows
+    protected void exec() {
+        Files.walk(getOutputDir().get().getAsFile().toPath())
+                .sorted(Comparator.reverseOrder())
+                .forEach(new Consumer<Path>() {
+                    @Override
+                    @SneakyThrows
+                    public void accept(Path path) {
+                        Files.delete(path);
+                    }
+                });
+        super.exec();
+    }
+}

graalvm/src/main/java/net/woggioni/gradle/graalvm/NativeImageConfigurationTask.java

@@ -0,0 +1,97 @@
+package net.woggioni.gradle.graalvm;
+
+import org.gradle.api.Action;
+import org.gradle.api.artifacts.Configuration;
+import org.gradle.api.artifacts.ConfigurationContainer;
+import org.gradle.api.file.DirectoryProperty;
+import org.gradle.api.file.ProjectLayout;
+import org.gradle.api.plugins.ExtensionContainer;
+import org.gradle.api.plugins.JavaApplication;
+import org.gradle.api.plugins.JavaPlugin;
+import org.gradle.api.plugins.JavaPluginExtension;
+import org.gradle.api.provider.Property;
+import org.gradle.api.provider.Provider;
+import org.gradle.api.tasks.Input;
+import org.gradle.api.tasks.JavaExec;
+import org.gradle.api.tasks.OutputDirectory;
+import org.gradle.api.tasks.TaskContainer;
+import org.gradle.api.tasks.bundling.Jar;
+import org.gradle.jvm.toolchain.JavaLauncher;
+import org.gradle.jvm.toolchain.JavaToolchainService;
+import org.gradle.jvm.toolchain.JavaToolchainSpec;
+import org.gradle.jvm.toolchain.internal.DefaultToolchainSpec;
+import org.gradle.process.CommandLineArgumentProvider;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+
+import static net.woggioni.gradle.graalvm.Constants.GRAALVM_TASK_GROUP;
+import static net.woggioni.gradle.graalvm.NativeImagePlugin.NATIVE_IMAGE_CONFIGURATION_FOLDER_NAME;
+
+public abstract class NativeImageConfigurationTask extends JavaExec {
+    @Input
+    public abstract Property<Boolean> getMergeConfiguration();
+
+    @OutputDirectory
+    public abstract DirectoryProperty getConfigurationDir();
+
+    private final JavaToolchainSpec toolchain;
+
+    public JavaToolchainSpec toolchain(Action<? super JavaToolchainSpec> action) {
+        action.execute(toolchain);
+        return toolchain;
+    }
+
+    public NativeImageConfigurationTask() {
+        setGroup(GRAALVM_TASK_GROUP);
+        setDescription("Run the application with the native-image-agent " +
+                "to create a configuration for native image creation");
+        toolchain = getProject().getObjects().newInstance(DefaultToolchainSpec.class);
+        ProjectLayout layout = getProject().getLayout();
+        TaskContainer taskContainer = getProject().getTasks();
+        JavaApplication javaApplication = getProject().getExtensions().findByType(JavaApplication.class);
+        JavaPluginExtension javaExtension = getProject().getExtensions().getByType(JavaPluginExtension.class);
+        ExtensionContainer ext = getProject().getExtensions();
+        Property<JavaLauncher> javaLauncherProperty = getJavaLauncher();
+        Optional.ofNullable(ext.findByType(JavaToolchainService.class))
+                .flatMap(ts -> Optional.of(toolchain).map(ts::launcherFor))
+                .ifPresent(javaLauncherProperty::convention);
+        if(!Objects.isNull(javaApplication)) {
+            getMainClass().convention(javaApplication.getMainClass());
+            getMainModule().convention(javaApplication.getMainModule());
+        }
+        getConfigurationDir().convention(layout.getProjectDirectory()
+                .dir(NATIVE_IMAGE_CONFIGURATION_FOLDER_NAME));
+        getMergeConfiguration().convention(true);
+        ConfigurationContainer cc = getProject().getConfigurations();
+        Configuration runtimeClasspath = cc.getByName(JavaPlugin.RUNTIME_CLASSPATH_CONFIGURATION_NAME);
+        setClasspath(runtimeClasspath);
+        Provider<Jar> jarTaskProvider = taskContainer.named(JavaPlugin.JAR_TASK_NAME, Jar.class);
+        setClasspath(
+            getProject().files(
+                jarTaskProvider,
+                runtimeClasspath
+            )
+        );
+        getJvmArgumentProviders().add(new CommandLineArgumentProvider() {
+            @Override
+            public Iterable<String> asArguments() {
+                List<String> jvmArgs = new ArrayList<>();
+                if(getMergeConfiguration().get()) {
+                    jvmArgs.add("-agentlib:native-image-agent=config-merge-dir=" + getConfigurationDir().get());
+                } else {
+                    jvmArgs.add("-agentlib:native-image-agent=config-output-dir=" + getConfigurationDir().get());
+                }
+                for(String jvmArg : Optional.ofNullable(javaApplication)
+                        .map(JavaApplication::getApplicationDefaultJvmArgs)
+                        .orElse(Collections.emptyList())) {
+                    jvmArgs.add(jvmArg);
+                }
+                return jvmArgs;
+            }
+        });
+    }
+}

graalvm/src/main/java/net/woggioni/gradle/graalvm/NativeImageExtension.java

@@ -0,0 +1,32 @@
+package net.woggioni.gradle.graalvm;
+
+import org.gradle.api.Action;
+import org.gradle.api.file.FileCollection;
+import org.gradle.api.provider.Property;
+import org.gradle.api.tasks.Nested;
+import org.gradle.jvm.toolchain.JavaToolchainSpec;
+
+
+public interface NativeImageExtension {
+    Property<FileCollection> getClasspath();
+
+    @Nested
+    JavaToolchainSpec getToolchain();
+
+    JavaToolchainSpec toolchain(Action<? super JavaToolchainSpec> action);
+
+    Property<Boolean> getUseMusl();
+    Property<Boolean> getBuildStaticImage();
+    Property<Boolean> getEnableFallback();
+    Property<Boolean> getLinkAtBuildTime();
+
+    Property<String> getMainClass();
+
+    Property<String> getMainModule();
+
+    Property<Boolean> getCompressExecutable();
+
+    Property<Boolean> getUseLZMA();
+
+    Property<Integer> getCompressionLevel();
+}

graalvm/src/main/java/net/woggioni/gradle/graalvm/NativeImagePlugin.java

@@ -0,0 +1,118 @@
+package net.woggioni.gradle.graalvm;
+
+import org.gradle.api.Plugin;
+import org.gradle.api.Project;
+import org.gradle.api.artifacts.ConfigurationContainer;
+import org.gradle.api.file.FileCollection;
+import org.gradle.api.file.ProjectLayout;
+import org.gradle.api.model.ObjectFactory;
+import org.gradle.api.plugins.ExtensionContainer;
+import org.gradle.api.plugins.JavaLibraryPlugin;
+import org.gradle.api.plugins.JavaPlugin;
+import org.gradle.api.plugins.JavaPluginExtension;
+import org.gradle.api.provider.Property;
+import org.gradle.api.provider.Provider;
+import org.gradle.api.tasks.CacheableTask;
+import org.gradle.api.tasks.TaskContainer;
+import org.gradle.jvm.tasks.Jar;
+import org.gradle.jvm.toolchain.JavaToolchainSpec;
+import org.gradle.jvm.toolchain.internal.DefaultToolchainSpec;
+
+@CacheableTask
+public class NativeImagePlugin implements Plugin<Project> {
+
+    public static final String NATIVE_IMAGE_TASK_NAME = "nativeImage";
+    public static final String UPX_TASK_NAME = "upx";
+    public static final String CONFIGURE_NATIVE_IMAGE_TASK_NAME = "configureNativeImage";
+    public static final String NATIVE_IMAGE_CONFIGURATION_FOLDER_NAME = "native-image";
+
+    private static <T> void setIfPresent(Property<T> p1, Provider<T> provider) {
+        if (provider.isPresent()) {
+            p1.set(provider);
+        }
+    }
+
+    @Override
+    public void apply(Project project) {
+        project.getPluginManager().apply(JavaLibraryPlugin.class);
+        ProjectLayout layout = project.getLayout();
+        ExtensionContainer extensionContainer = project.getExtensions();
+        TaskContainer tasks = project.getTasks();
+
+        Provider<Jar> jarTaskProvider = tasks.named(JavaPlugin.JAR_TASK_NAME, Jar.class, jar -> {
+            jar.from(layout.getProjectDirectory().dir(NATIVE_IMAGE_CONFIGURATION_FOLDER_NAME), copySpec -> {
+                copySpec.into(
+                        String.format("META-INF/native-image/%s/%s/",
+                                project.getName(),
+                                project.getGroup()
+                        )
+                );
+            });
+        });
+        ExtensionContainer ext = project.getExtensions();
+        JavaPluginExtension javaPluginExtension = ext.findByType(JavaPluginExtension.class);
+        ObjectFactory objects = project.getObjects();
+        NativeImageExtension nativeImageExtension = objects.newInstance(DefaultNativeImageExtension.class);
+        extensionContainer.add("nativeImage", nativeImageExtension);
+
+        nativeImageExtension.toolchain(jts -> {
+            jts.getImplementation().convention(javaPluginExtension.getToolchain().getImplementation());
+            jts.getVendor().convention(javaPluginExtension.getToolchain().getVendor());
+            jts.getLanguageVersion().convention(javaPluginExtension.getToolchain().getLanguageVersion());
+        });
+
+        nativeImageExtension.getUseMusl().convention(false);
+        nativeImageExtension.getEnableFallback().convention(false);
+        nativeImageExtension.getLinkAtBuildTime().convention(false);
+        nativeImageExtension.getBuildStaticImage().convention(false);
+        nativeImageExtension.getCompressExecutable().convention(false);
+        nativeImageExtension.getUseLZMA().convention(false);
+        nativeImageExtension.getCompressionLevel().convention(6);
+
+        ConfigurationContainer configurations = project.getConfigurations();
+        FileCollection classpath = project.files(jarTaskProvider,
+                configurations.getByName(JavaPlugin.RUNTIME_CLASSPATH_CONFIGURATION_NAME));
+        nativeImageExtension.getClasspath().convention(classpath);
+
+        Provider<NativeImageConfigurationTask> nativeImageConfigurationTaskProvider = tasks.register(
+                CONFIGURE_NATIVE_IMAGE_TASK_NAME,
+                NativeImageConfigurationTask.class,
+                nativeImageConfigurationTask -> {
+                    nativeImageConfigurationTask.toolchain(jts -> {
+                        jts.getImplementation().convention(nativeImageExtension.getToolchain().getImplementation());
+                        jts.getVendor().convention(nativeImageExtension.getToolchain().getVendor());
+                        jts.getLanguageVersion().convention(nativeImageExtension.getToolchain().getLanguageVersion());
+                    });
+                });
+
+        Provider<NativeImageTask> nativeImageTaskProvider = tasks.register(NATIVE_IMAGE_TASK_NAME, NativeImageTask.class, nativeImageTask -> {
+            nativeImageTask.getClasspath().set(nativeImageExtension.getClasspath());
+            nativeImageTask.toolchain(jts -> {
+                jts.getImplementation().convention(nativeImageExtension.getToolchain().getImplementation());
+                jts.getVendor().convention(nativeImageExtension.getToolchain().getVendor());
+                jts.getLanguageVersion().convention(nativeImageExtension.getToolchain().getLanguageVersion());
+            });
+
+            nativeImageTask.getBuildStaticImage().set(nativeImageExtension.getBuildStaticImage());
+            nativeImageTask.getUseMusl().set(nativeImageExtension.getUseMusl());
+            nativeImageTask.getLinkAtBuildTime().set(nativeImageExtension.getLinkAtBuildTime());
+            nativeImageTask.getMainClass().set(nativeImageExtension.getMainClass());
+            nativeImageTask.getMainModule().set(nativeImageExtension.getMainModule());
+            nativeImageTask.getEnableFallback().set(nativeImageExtension.getEnableFallback());
+        });
+
+        Provider<UpxTask> upxTaskProvider = tasks.register(UPX_TASK_NAME, UpxTask.class, t -> {
+            t.getInputFile().set(nativeImageTaskProvider.flatMap(NativeImageTask::getOutputFile));
+            setIfPresent(t.getUseLZMA(), nativeImageExtension.getUseLZMA());
+            setIfPresent(t.getCompressionLevel(), nativeImageExtension.getCompressionLevel());
+            setIfPresent(t.getCompressionLevel(), nativeImageExtension.getCompressionLevel());
+        });
+
+        tasks.named(NATIVE_IMAGE_TASK_NAME, NativeImageTask.class, t -> {
+            if (nativeImageExtension.getCompressExecutable().getOrElse(false)) {
+                t.finalizedBy(upxTaskProvider);
+            }
+        });
+
+    }
+}

graalvm/src/main/java/net/woggioni/gradle/graalvm/NativeImageTask.java

@@ -0,0 +1,190 @@
+package net.woggioni.gradle.graalvm;
+
+import org.gradle.api.Action;
+import org.gradle.api.Project;
+import org.gradle.api.file.Directory;
+import org.gradle.api.file.DirectoryProperty;
+import org.gradle.api.file.FileCollection;
+import org.gradle.api.file.ProjectLayout;
+import org.gradle.api.file.RegularFileProperty;
+import org.gradle.api.logging.Logger;
+import org.gradle.api.logging.Logging;
+import org.gradle.api.model.ObjectFactory;
+import org.gradle.api.plugins.BasePluginExtension;
+import org.gradle.api.plugins.ExtensionContainer;
+import org.gradle.api.plugins.JavaApplication;
+import org.gradle.api.provider.Property;
+import org.gradle.api.provider.Provider;
+import org.gradle.api.tasks.CacheableTask;
+import org.gradle.api.tasks.Classpath;
+import org.gradle.api.tasks.Exec;
+import org.gradle.api.tasks.Input;
+import org.gradle.api.tasks.InputDirectory;
+import org.gradle.api.tasks.InputFile;
+import org.gradle.api.tasks.Optional;
+import org.gradle.api.tasks.OutputFile;
+import org.gradle.api.tasks.PathSensitive;
+import org.gradle.api.tasks.PathSensitivity;
+import org.gradle.internal.jvm.JavaModuleDetector;
+import org.gradle.jvm.toolchain.JavaToolchainService;
+import org.gradle.jvm.toolchain.JavaToolchainSpec;
+import org.gradle.jvm.toolchain.internal.DefaultToolchainSpec;
+import org.gradle.process.CommandLineArgumentProvider;
+
+import javax.inject.Inject;
+import java.io.File;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+
+import static net.woggioni.gradle.graalvm.Constants.GRAALVM_TASK_GROUP;
+
+@CacheableTask
+public abstract class NativeImageTask extends Exec {
+
+    public static final String NATIVE_COMPILER_PATH_ENV_VARIABLE = "GRAAL_NATIVE_COMPILER_PATH";
+    public static final String NATIVE_COMPILER_PATH_PROPERTY_KEY = "graal.native.compiler.path";
+
+    @Classpath
+    public abstract Property<FileCollection> getClasspath();
+
+    @InputDirectory
+    @PathSensitive(PathSensitivity.RELATIVE)
+    public abstract DirectoryProperty getGraalVmHome();
+
+    private final JavaToolchainSpec toolchain;
+
+    public JavaToolchainSpec toolchain(Action<? super JavaToolchainSpec> action) {
+        action.execute(toolchain);
+        return toolchain;
+    }
+
+    @Optional
+    @InputFile
+    @PathSensitive(PathSensitivity.ABSOLUTE)
+    public abstract RegularFileProperty getNativeCompilerPath();
+
+    @Input
+    public abstract Property<Boolean> getUseMusl();
+    @Input
+    public abstract Property<Boolean> getBuildStaticImage();
+    @Input
+    public abstract Property<Boolean> getEnableFallback();
+    @Input
+    public abstract Property<Boolean> getLinkAtBuildTime();
+
+    @Input
+    public abstract Property<String> getMainClass();
+
+    @Input
+    @Optional
+    public abstract Property<String> getMainModule();
+
+    @Inject
+    protected abstract JavaModuleDetector getJavaModuleDetector();
+
+    @OutputFile
+    protected abstract RegularFileProperty getOutputFile();
+
+    private static final Logger log = Logging.getLogger(NativeImageTask.class);
+
+    @Inject
+    public NativeImageTask(ObjectFactory objects) {
+        Project project = getProject();
+        setGroup(GRAALVM_TASK_GROUP);
+        setDescription("Create a native image of the application using GraalVM");
+        toolchain = objects.newInstance(DefaultToolchainSpec.class);
+        getUseMusl().convention(false);
+        getBuildStaticImage().convention(false);
+        getEnableFallback().convention(false);
+        getLinkAtBuildTime().convention(false);
+        Provider<File> nativeComnpilerProvider = project.provider(() -> {
+            String envVar;
+            File compilerPath = null;
+            if(project.hasProperty(NATIVE_COMPILER_PATH_PROPERTY_KEY)) {
+                compilerPath = new File(project.property(NATIVE_COMPILER_PATH_PROPERTY_KEY).toString());
+            } else if((envVar = System.getenv(NATIVE_COMPILER_PATH_ENV_VARIABLE)) != null) {
+                compilerPath = new File(envVar);
+            }
+            return compilerPath;
+        });
+        getNativeCompilerPath().convention(project.getLayout().file(nativeComnpilerProvider));
+        ExtensionContainer ext = project.getExtensions();
+        JavaApplication javaApplication = ext.findByType(JavaApplication.class);
+        if(!Objects.isNull(javaApplication)) {
+            getMainClass().convention(javaApplication.getMainClass());
+            getMainModule().convention(javaApplication.getMainModule());
+        }
+        getClasspath().convention(project.files());
+        ProjectLayout layout = project.getLayout();
+
+        JavaToolchainService javaToolchainService = ext.findByType(JavaToolchainService.class);
+        Provider<Directory> graalHomeDirectoryProvider = javaToolchainService.launcherFor(it -> {
+                        it.getLanguageVersion().set(toolchain.getLanguageVersion());
+                        it.getVendor().set(toolchain.getVendor());
+                        it.getImplementation().set(toolchain.getImplementation());
+                    }).map(javaLauncher ->
+                            javaLauncher.getMetadata().getInstallationPath()
+                    ).orElse(layout.dir(project.provider(() -> project.file(System.getProperty("java.home")))));
+        getGraalVmHome().convention(graalHomeDirectoryProvider);
+        BasePluginExtension basePluginExtension =
+                ext.getByType(BasePluginExtension.class);
+        getOutputFile().convention(basePluginExtension.getLibsDirectory().file(project.getName()));
+        Object executableProvider = new Object() {
+            @Override
+            public String toString() {
+                return getGraalVmHome().get() + "/bin/native-image";
+            }
+        };
+        executable(executableProvider);
+
+        CommandLineArgumentProvider argumentProvider = new CommandLineArgumentProvider() {
+            @Override
+            public Iterable<String> asArguments() {
+                List<String> result = new ArrayList<>();
+                if(!getEnableFallback().get()) {
+                    result.add("--no-fallback");
+                }
+                if(getBuildStaticImage().get()) {
+                    result.add("--static");
+                }
+                if(getUseMusl().get()) {
+                    result.add("--libc=musl");
+                }
+                if(getLinkAtBuildTime().get()) {
+                    result.add("--link-at-build-time");
+                }
+                if(getNativeCompilerPath().isPresent()) {
+                    result.add("--native-compiler-path=" + getNativeCompilerPath().getAsFile().get());
+                }
+                JavaModuleDetector javaModuleDetector = getJavaModuleDetector();
+                boolean useJpms = getMainModule().isPresent();
+                FileCollection classpath = getClasspath().get();
+                FileCollection cp = javaModuleDetector.inferClasspath(useJpms, classpath);
+                FileCollection mp = javaModuleDetector.inferModulePath(useJpms, classpath);
+                if(!cp.isEmpty()) {
+                    result.add("-cp");
+                    result.add(cp.getAsPath());
+                }
+                if(!mp.isEmpty()) {
+                    result.add("-p");
+                    result.add(mp.getAsPath());
+                }
+                result.add("-o");
+                result.add(getOutputFile().get().getAsFile().toString());
+                if(getMainModule().isPresent()) {
+                    result.add("--module");
+                    String mainModule = getMainModule().get();
+                    result.add(getMainClass()
+                            .map(mainClass -> String.format("%s/%s", mainModule, mainClass))
+                            .getOrElse(mainModule));
+                } else {
+                    result.add(getMainClass().get());
+                }
+                return Collections.unmodifiableList(result);
+            }
+        };
+        getArgumentProviders().add(argumentProvider);
+    }
+}

graalvm/src/main/java/net/woggioni/gradle/graalvm/UpxTask.java

@@ -0,0 +1,108 @@
+package net.woggioni.gradle.graalvm;
+
+import org.gradle.api.Project;
+import org.gradle.api.file.RegularFileProperty;
+import org.gradle.api.plugins.BasePluginExtension;
+import org.gradle.api.provider.Property;
+import org.gradle.api.tasks.CacheableTask;
+import org.gradle.api.tasks.Exec;
+import org.gradle.api.tasks.Input;
+import org.gradle.api.tasks.InputFile;
+import org.gradle.api.tasks.OutputFile;
+import org.gradle.api.tasks.PathSensitive;
+import org.gradle.api.tasks.PathSensitivity;
+import org.gradle.process.CommandLineArgumentProvider;
+
+import javax.inject.Inject;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+@CacheableTask
+public abstract class UpxTask extends Exec {
+
+    @InputFile
+    @PathSensitive(PathSensitivity.NONE)
+    public abstract RegularFileProperty getInputFile();
+
+    @OutputFile
+    public abstract RegularFileProperty getOutputFile();
+
+    @Input
+    public abstract Property<Boolean> getUseLZMA();
+
+    @Input
+    public abstract Property<Integer> getCompressionLevel();
+
+    @Inject
+    public UpxTask(Project project) {
+        BasePluginExtension be = project.getExtensions().findByType(BasePluginExtension.class);
+        getOutputFile().convention(
+            be.getDistsDirectory().file(String.format("%s.upx", project.getName()))
+        );
+        getUseLZMA().convention(false);
+        getCompressionLevel().convention(10);
+
+        executable("upx");
+
+        getArgumentProviders().add(new CommandLineArgumentProvider() {
+            @Override
+            public Iterable<String> asArguments() {
+                List<String> result = new ArrayList<String>();
+                if(getUseLZMA().get()) {
+                    result.add("--lzma");
+                } else {
+                    result.add("--no-lzma");
+                }
+                String compressionLevel;
+                int cl = getCompressionLevel().get();
+                switch (cl) {
+                    case 1:
+                        compressionLevel = "-1";
+                        break;
+                    case 2:
+                        compressionLevel = "-2";
+                        break;
+                    case 3:
+                        compressionLevel = "-3";
+                        break;
+                    case 4:
+                        compressionLevel = "-4";
+                        break;
+                    case 5:
+                        compressionLevel = "-5";
+                        break;
+                    case 6:
+                        compressionLevel = "-6";
+                        break;
+                    case 7:
+                        compressionLevel = "-7";
+                        break;
+                    case 8:
+                        compressionLevel = "-8";
+                        break;
+                    case 9:
+                        compressionLevel = "-9";
+                        break;
+                    case 10:
+                        compressionLevel = "--best";
+                        break;
+                    case 11:
+                        compressionLevel = "--brute";
+                        break;
+                    case 12:
+                        compressionLevel = "--ultra-brute";
+                        break;
+                    default:
+                        throw new IllegalArgumentException(String.format("Unsupported compression level %d", cl));
+                }
+                result.add(compressionLevel);
+                result.add(getInputFile().getAsFile().get().toString());
+                result.add("-f");
+                result.add("-o");
+                result.add(getOutputFile().getAsFile().get().toString());
+                return Collections.unmodifiableList(result);
+            }
+        });
+    }
+}

gradle.properties

@@ -1,15 +1,5 @@
-woggioniMavenRepositoryUrl=https://mvn.woggioni.net/
+lys.catalog.version=2025.12.27
+version.myGradlePlugins=2026.02.23
+version.gradle=9.3.1
 
-lys.catalog.version=2023.06.11
+gitea.maven.url = https://gitea.woggioni.net/api/packages/woggioni/maven
-
-version.myGradlePlugins=2023.06.13
-version.gradle=7.6
-version.felix.config.admin=1.9.26
-version.felix=7.0.5
-version.felix.scr=2.2.4
-version.felix.security=2.8.2
-version.osgi=8.0.0
-version.osgi.cm=1.6.0
-version.osgi.service.component=1.5.1
-version.osgi.function=1.2.0
-version.osgi.promise=1.3.0

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.6-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.3.1-all.zip
+networkTimeout=10000
+validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradlew

@@ -1,7 +1,7 @@
 #!/bin/sh
 
 #
-# Copyright © 2015-2021 the original authors.
+# Copyright © 2015 the original authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -15,6 +15,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 
 ##############################################################################
 #
@@ -55,7 +57,7 @@
 #       Darwin, MinGW, and NonStop.
 #
 #   (3) This script is generated from the Groovy template
-#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
 #       within the Gradle project.
 #
 #       You can find Gradle at https://github.com/gradle/gradle/.
@@ -80,13 +82,11 @@ do
     esac
 done
 
-APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+# This is normally unused
-
+# shellcheck disable=SC2034
-APP_NAME="Gradle"
 APP_BASE_NAME=${0##*/}
-
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
-DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD=maximum
@@ -114,7 +114,6 @@ case "$( uname )" in                #(
   NONSTOP* )        nonstop=true ;;
 esac
 
-CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
 
 # Determine the Java command to use to start the JVM.
@@ -133,22 +132,29 @@ location of your Java installation."
     fi
 else
     JAVACMD=java
-    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
 
 Please set the JAVA_HOME variable in your environment to match the
 location of your Java installation."
+    fi
 fi
 
 # Increase the maximum file descriptors if we can.
 if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
     case $MAX_FD in #(
       max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
         MAX_FD=$( ulimit -H -n ) ||
             warn "Could not query maximum file descriptor limit"
     esac
     case $MAX_FD in  #(
       '' | soft) :;; #(
       *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
         ulimit -n "$MAX_FD" ||
             warn "Could not set maximum file descriptor limit to $MAX_FD"
     esac
@@ -165,7 +171,6 @@ fi
 # For Cygwin or MSYS, switch paths to Windows format before running java
 if "$cygwin" || "$msys" ; then
     APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
-    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
 
     JAVACMD=$( cygpath --unix "$JAVACMD" )
 
@@ -193,18 +198,27 @@ if "$cygwin" || "$msys" ; then
     done
 fi
 
-# Collect all arguments for the java command;
+
-#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-#     shell script including quotes and variable substitutions, so put them in
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
-#     double quotes to make sure that they get re-expanded; and
+
-#   * put everything else in single quotes, so that it's not re-expanded.
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
 
 set -- \
         "-Dorg.gradle.appname=$APP_BASE_NAME" \
-        -classpath "$CLASSPATH" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
-        org.gradle.wrapper.GradleWrapperMain \
         "$@"
 
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
 # Use "xargs" to parse quoted args.
 #
 # With -n1 it outputs one arg per line, with the quotes and backslashes removed.

gradlew.bat

@@ -13,8 +13,10 @@
 @rem See the License for the specific language governing permissions and
 @rem limitations under the License.
 @rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
 
-@if "%DEBUG%" == "" @echo off
+@if "%DEBUG%"=="" @echo off
 @rem ##########################################################################
 @rem
 @rem  Gradle startup script for Windows
@@ -25,7 +27,8 @@
 if "%OS%"=="Windows_NT" setlocal
 
 set DIRNAME=%~dp0
-if "%DIRNAME%" == "" set DIRNAME=.
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
@@ -40,13 +43,13 @@ if defined JAVA_HOME goto findJavaFromJavaHome
 
 set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto execute
+if %ERRORLEVEL% equ 0 goto execute
 
-echo.
+echo. 1>&2
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
-echo.
+echo. 1>&2
-echo Please set the JAVA_HOME variable in your environment to match the
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
-echo location of your Java installation.
+echo location of your Java installation. 1>&2
 
 goto fail
 
@@ -56,32 +59,33 @@ set JAVA_EXE=%JAVA_HOME%/bin/java.exe
 
 if exist "%JAVA_EXE%" goto execute
 
-echo.
+echo. 1>&2
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
-echo.
+echo. 1>&2
-echo Please set the JAVA_HOME variable in your environment to match the
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
-echo location of your Java installation.
+echo location of your Java installation. 1>&2
 
 goto fail
 
 :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 %*
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
 
 :end
 @rem End local scope for the variables with windows NT shell
-if "%ERRORLEVEL%"=="0" goto mainEnd
+if %ERRORLEVEL% equ 0 goto mainEnd
 
 :fail
 rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
 rem the _cmd.exe /c_ return code!
-if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+set EXIT_CODE=%ERRORLEVEL%
-exit /b 1
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
 
 :mainEnd
 if "%OS%"=="Windows_NT" endlocal

jdeps/build.gradle

@@ -0,0 +1,13 @@
+plugins {
+    id 'java-gradle-plugin'
+}
+
+
+gradlePlugin {
+    plugins {
+        create("JdepsPlugin") {
+            id = 'net.woggioni.gradle.jdeps'
+            implementationClass = "net.woggioni.gradle.jdeps.JdepsPlugin"
+        }
+    }
+}

jdeps/src/main/java/net/woggioni/gradle/jdeps/Constants.java

@@ -0,0 +1,5 @@
+package net.woggioni.gradle.jdeps;
+
+public class Constants {
+    public static final String JDEPS_TASK_GROUP = "jdeps";
+}

jdeps/src/main/java/net/woggioni/gradle/jdeps/JdepsPlugin.java

@@ -0,0 +1,26 @@
+package net.woggioni.gradle.jdeps;
+
+import org.gradle.api.Plugin;
+import org.gradle.api.Project;
+import org.gradle.api.artifacts.ConfigurationContainer;
+import org.gradle.api.file.FileCollection;
+import org.gradle.api.plugins.JavaLibraryPlugin;
+import org.gradle.api.plugins.JavaPlugin;
+import org.gradle.api.provider.Provider;
+import org.gradle.api.tasks.TaskContainer;
+
+public class JdepsPlugin implements Plugin<Project> {
+    public static final String JDEPS_TASK_NAME = "jdeps";
+
+    @Override
+    public void apply(Project project) {
+        project.getPluginManager().apply(JavaLibraryPlugin.class);
+        TaskContainer tasks = project.getTasks();
+        Provider<JdepsTask> jdepsTaskProvider = tasks.register(JDEPS_TASK_NAME, JdepsTask.class, jdepsTask -> {
+            ConfigurationContainer configurations = project.getConfigurations();
+            FileCollection classpath = project.files(configurations.getByName(JavaPlugin.RUNTIME_CLASSPATH_CONFIGURATION_NAME));
+            jdepsTask.getClasspath().set(classpath);
+            jdepsTask.getArchives().set(project.files(tasks.named(JavaPlugin.JAR_TASK_NAME)));
+        });
+    }
+}

jdeps/src/main/java/net/woggioni/gradle/jdeps/JdepsTask.java

@@ -0,0 +1,209 @@
+package net.woggioni.gradle.jdeps;
+
+import lombok.SneakyThrows;
+import org.gradle.api.Action;
+import org.gradle.api.Project;
+import org.gradle.api.file.Directory;
+import org.gradle.api.file.DirectoryProperty;
+import org.gradle.api.file.FileCollection;
+import org.gradle.api.file.ProjectLayout;
+import org.gradle.api.logging.Logger;
+import org.gradle.api.logging.Logging;
+import org.gradle.api.plugins.BasePluginExtension;
+import org.gradle.api.plugins.ExtensionContainer;
+import org.gradle.api.plugins.JavaApplication;
+import org.gradle.api.provider.ListProperty;
+import org.gradle.api.provider.Property;
+import org.gradle.api.provider.Provider;
+import org.gradle.api.reporting.ReportingExtension;
+import org.gradle.api.tasks.Classpath;
+import org.gradle.api.tasks.Exec;
+import org.gradle.api.tasks.Input;
+import org.gradle.api.tasks.InputDirectory;
+import org.gradle.api.tasks.Optional;
+import org.gradle.api.tasks.OutputDirectory;
+import org.gradle.internal.jvm.JavaModuleDetector;
+import org.gradle.jvm.toolchain.JavaToolchainService;
+import org.gradle.jvm.toolchain.JavaToolchainSpec;
+import org.gradle.jvm.toolchain.internal.DefaultToolchainSpec;
+import org.gradle.process.CommandLineArgumentProvider;
+
+import javax.inject.Inject;
+import java.io.File;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Objects;
+import java.util.function.Consumer;
+
+import static java.util.Optional.ofNullable;
+import static net.woggioni.gradle.jdeps.Constants.JDEPS_TASK_GROUP;
+
+public abstract class JdepsTask extends Exec {
+
+    private final JavaToolchainSpec toolchain;
+
+    public JavaToolchainSpec toolchain(Action<? super JavaToolchainSpec> action) {
+        action.execute(toolchain);
+        return toolchain;
+    }
+
+    @Classpath
+    public abstract Property<FileCollection> getClasspath();
+
+    @Classpath
+    public abstract Property<FileCollection> getArchives();
+
+    @InputDirectory
+    public abstract DirectoryProperty getJavaHome();
+
+    @Input
+    @Optional
+    public abstract Property<String> getMainClass();
+
+    @Input
+    @Optional
+    public abstract Property<String> getMainModule();
+
+    @Input
+    public abstract ListProperty<String> getAdditionalModules();
+
+    @Inject
+    protected abstract JavaModuleDetector getJavaModuleDetector();
+
+    @OutputDirectory
+    public abstract DirectoryProperty getOutputDir();
+
+    @Optional
+    @OutputDirectory
+    public abstract DirectoryProperty getDotOutput();
+
+    @Input
+    @Optional
+    public abstract Property<Integer> getJavaRelease();
+
+    @Input
+    public abstract Property<Boolean> getRecursive();
+
+    private static final Logger log = Logging.getLogger(JdepsTask.class);
+
+    public JdepsTask() {
+        Project project = getProject();
+        setGroup(JDEPS_TASK_GROUP);
+        setDescription(
+                "Generates a custom Java runtime image that contains only the platform modules" +
+                        " that are required for a given application");
+        ExtensionContainer ext = project.getExtensions();
+        JavaApplication javaApplication = ext.findByType(JavaApplication.class);
+        if (!Objects.isNull(javaApplication)) {
+            getMainClass().convention(javaApplication.getMainClass());
+            getMainModule().convention(javaApplication.getMainModule());
+        }
+        getClasspath().convention(project.files());
+        getRecursive().convention(true);
+        ProjectLayout layout = project.getLayout();
+        toolchain = getObjectFactory().newInstance(DefaultToolchainSpec.class);
+        JavaToolchainService javaToolchainService = ext.findByType(JavaToolchainService.class);
+        Provider<Directory> graalHomeDirectoryProvider = javaToolchainService.launcherFor(it -> {
+            it.getLanguageVersion().set(toolchain.getLanguageVersion());
+            it.getVendor().set(toolchain.getVendor());
+            it.getImplementation().set(toolchain.getImplementation());
+        }).map(javaLauncher ->
+                javaLauncher.getMetadata().getInstallationPath()
+        ).orElse(layout.dir(project.provider(() -> project.file(System.getProperty("java.home")))));
+        getJavaHome().convention(graalHomeDirectoryProvider);
+
+        getJavaHome().convention(graalHomeDirectoryProvider);
+        getAdditionalModules().convention(new ArrayList<>());
+
+        ReportingExtension reporting = ext.getByType(ReportingExtension.class);
+
+        getOutputDir().convention(
+                reporting.getBaseDirectory()
+                        .dir(project.getName() +
+                                ofNullable(project.getVersion()).map(it -> "-" + it).orElse(""))
+        );
+        getDotOutput().convention(getOutputDir().dir("graphviz"));
+        Object executableProvider = new Object() {
+            @Override
+            public String toString() {
+                return getJavaHome().get() + "/bin/jdeps";
+            }
+        };
+        executable(executableProvider);
+        CommandLineArgumentProvider argumentProvider = new CommandLineArgumentProvider() {
+            @Override
+            @SneakyThrows
+            public Iterable<String> asArguments() {
+                List<String> result = new ArrayList<>();
+                JavaModuleDetector javaModuleDetector = getJavaModuleDetector();
+                FileCollection classpath = getClasspath().get();
+                FileCollection mp = javaModuleDetector.inferModulePath(true, classpath);
+                if (!mp.isEmpty()) {
+                    result.add("--module-path");
+                    result.add(mp.getAsPath());
+                }
+
+                FileCollection cp = classpath.minus(mp);
+                if(!cp.isEmpty()) {
+                    result.add("-cp");
+                    result.add(cp.getAsPath());
+                }
+
+                List<String> additionalModules = getAdditionalModules().get();
+                if (!additionalModules.isEmpty()) {
+                    result.add("--add-modules");
+                    final List<String> modules2BeAdded = new ArrayList<>();
+                    modules2BeAdded.addAll(additionalModules);
+                    if (!modules2BeAdded.isEmpty()) {
+                        result.add(String.join(",", modules2BeAdded));
+                    }
+                }
+                if (getDotOutput().isPresent()) {
+                    result.add("-dotoutput");
+                    result.add(getDotOutput().get().getAsFile().toString());
+                }
+
+                if(getRecursive().get()) {
+                    result.add("--recursive");
+                } else {
+                    result.add("--no-recursive");
+                }
+
+                if (getMainModule().isPresent()) {
+                    result.add("-m");
+                    result.add(getMainModule().get());
+                }
+                if (getJavaRelease().isPresent()) {
+                    result.add("--multi-release");
+                    result.add(getJavaRelease().get().toString());
+                }
+
+                for (File archive : getArchives().get()) {
+                    result.add(archive.toString());
+                }
+                return Collections.unmodifiableList(result);
+            }
+        };
+        getArgumentProviders().add(argumentProvider);
+
+    }
+
+    @Override
+    @SneakyThrows
+    protected void exec() {
+        Files.walk(getOutputDir().get().getAsFile().toPath())
+                .sorted(Comparator.reverseOrder())
+                .forEach(new Consumer<Path>() {
+                    @Override
+                    @SneakyThrows
+                    public void accept(Path path) {
+                        Files.delete(path);
+                    }
+                });
+        super.exec();
+    }
+}

jpms-check/build.gradle

@@ -2,6 +2,12 @@ plugins {
     id 'groovy-gradle-plugin'
 }
 
+java {
+    sourceCompatibility(JavaVersion.VERSION_1_8.toString())
+    targetCompatibility(JavaVersion.VERSION_1_8.toString())
+    modularity.inferModulePath = false
+}
+
 gradlePlugin {
     plugins {
         create("JPMSCheckPlugin") {

jpms-check/src/main/groovy/net/woggioni/gradle/jpms/check/JPMSCheckPlugin.groovy

@@ -1,216 +1,43 @@
 package net.woggioni.gradle.jpms.check
 
-import groovy.json.JsonBuilder
+
-import groovy.transform.Canonical
 import groovy.transform.CompileStatic
-import groovy.xml.MarkupBuilder
-import org.gradle.api.GradleException
 import org.gradle.api.Plugin
 import org.gradle.api.Project
-import org.gradle.api.artifacts.Configuration
+import org.gradle.api.file.RegularFile
-import org.gradle.api.artifacts.result.ResolvedArtifactResult
+import org.gradle.api.plugins.JavaPlugin
-
+import org.gradle.api.plugins.ReportingBasePlugin
-import java.nio.file.Files
+import org.gradle.api.reporting.ReportingExtension
-import java.nio.file.Path
-import java.nio.file.Paths
-import java.util.jar.JarFile
-import java.util.stream.Collectors
-import java.util.stream.Stream
-import java.util.zip.ZipFile
 
 class JPMSCheckPlugin implements Plugin<Project> {
 
-    @Canonical
-    @CompileStatic
-    private class CheckResult {
-        ResolvedArtifactResult dep
-        String automaticModuleName
-        boolean multiReleaseJar
-        boolean moduleInfo
-
-        boolean getJpmsFriendly() {
-            return automaticModuleName != null || moduleInfo
-        }
-
-        @Override
-        boolean equals(Object other) {
-            if(other == null) {
-                return false
-            } else if(other.class == CheckResult.class) {
-                return dep?.id?.componentIdentifier == ((CheckResult) other).dep?.id?.componentIdentifier
-            } else {
-                return false
-            }
-        }
-
-        @Override
-        int hashCode() {
-            return dep.id.componentIdentifier.hashCode()
-        }
-    }
-
-    @CompileStatic
-    private Stream<CheckResult> computeResults(Stream<ResolvedArtifactResult> artifacts) {
-        return artifacts.filter { ResolvedArtifactResult res ->
-            res.file.exists() && res.file.name.endsWith(".jar")
-        }.<CheckResult>map { resolvedArtifact ->
-            JarFile jarFile = new JarFile(resolvedArtifact.file).with {
-                if (it.isMultiRelease()) {
-                    new JarFile(
-                            resolvedArtifact.file,
-                            false,
-                            ZipFile.OPEN_READ,
-                            Runtime.version()
-                    )
-                } else {
-                    it
-                }
-            }
-            String automaticModuleName = jarFile.manifest?.with {it.mainAttributes.getValue("Automatic-Module-Name") }
-            def moduleInfoEntry = jarFile.getJarEntry("module-info.class")
-            new CheckResult(
-                    resolvedArtifact,
-                    automaticModuleName,
-                    jarFile.isMultiRelease(),
-                    moduleInfoEntry != null
-            )
-        }
-    }
-
-    private void createHtmlReport(Project project, Stream<CheckResult> checkResults, Writer writer) {
-        def builder = new MarkupBuilder(writer)
-        int friendly = 0
-        int total = 0
-        def results = checkResults.peek { CheckResult res ->
-            total += 1
-            if(res.jpmsFriendly) friendly += 1
-        }.collect(Collectors.toList())
-        builder.html {
-            head {
-                meta name: "viewport", content: "width=device-width, initial-scale=1"
-                InputStream resourceStream = getClass().classLoader.getResourceAsStream('net/woggioni/plugins/jpms/check/github-markdown.css')
-                resourceStream.withReader { Reader reader ->
-                    style reader.text
-                }
-                body {
-                    article(class: 'markdown-body') {
-                        h1 "Project ${project.group}:${project.name}:${project.version}", style: "text-align: center;"
-                        div {
-                            table {
-                                thead {
-                                    tr {
-                                        th "JPMS friendly"
-                                        th "Not JPMS friendly", colspan: 2
-                                        th "Total", colspan: 2
-                                    }
-                                }
-                                tbody {
-                                    tr {
-                                        td friendly, style: "text-align: center;"
-                                        td total - friendly, style: "text-align: center;", colspan: 2
-                                        td total, style: "text-align: center;", colspan: 2
-                                    }
-                                }
-                                thead {
-                                    th "Name"
-                                    th "Multi-release jar"
-                                    th "Automatic-Module-Name"
-                                    th "Module descriptor"
-                                    th "JPMS friendly"
-                                }
-                                tbody {
-                                    results.forEach {res ->
-                                        String color = res.jpmsFriendly ? "#dfd" : "fdd"
-                                        tr(style: "background-color:$color;") {
-                                            td res.dep.id.displayName
-                                            td style: "text-align: center;", res.multiReleaseJar ? "✓" : "✕"
-                                            td style: "text-align: center;", res.automaticModuleName ?: "n/a"
-                                            td style: "text-align: center;", res.moduleInfo ? "✓" : "✕"
-                                            td style: "text-align: center;", res.jpmsFriendly ? "✓" : "✕"
-                                        }
-                                        total += 1
-                                        if(res.jpmsFriendly) friendly += 1
-                                    }
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-        }
-    }
-
-    @CompileStatic
-    private createJsonReport(Stream<CheckResult> checkResults, Writer writer) {
-        def builder = new JsonBuilder()
-        builder (checkResults.map {
-                [
-                    name: it.dep.id.componentIdentifier.displayName,
-                    automaticModuleName: it.automaticModuleName,
-                    isMultiReleaseJar: it.multiReleaseJar,
-                    hasModuleInfo: it.moduleInfo,
-                    jpmsFriendly: it.jpmsFriendly
-                ]
-            }.collect(Collectors.toList()))
-        builder.writeTo(writer)
-    }
-
     @Override
     @CompileStatic
     void apply(Project project) {
-        project.tasks.register("jpms-check") {task ->
+        project.pluginManager.apply(ReportingBasePlugin.class)
-            boolean recursive = project.properties["jpms-check.recursive"]?.with(Boolean.&parseBoolean) ?: false
+        project.tasks.register("jpms-check", JPMSCheckTask) {task ->
-            String cfgName = project.properties["jpms-check.configurationName"] ?: "default"
+            ReportingExtension reporting = project.extensions.getByType(ReportingExtension.class)
-            String outputFormat = project.properties["jpms-check.outputFormat"] ?: "html"
+            boolean recursive = project.properties["jpms-check.recursive"]?.with(Object.&toString)?.with(Boolean.&parseBoolean) ?: false
-            Path outputFile = project.properties["jpms-check.outputFile"]?.with {
+            String cfgName = project.properties["jpms-check.configurationName"] ?: JavaPlugin.RUNTIME_CLASSPATH_CONFIGURATION_NAME
-                Paths.get(it as String)
+            OutputFormat defaultOutputFormat = (project.properties["jpms-check.outputFormat"]
-            } ?: with {
+                    ?.with(Object.&toString)
+                    ?.with(OutputFormat.&valueOf)
+                    ?: OutputFormat.html)
+            task.getConfigurationName().convention(cfgName)
+            task.getRecursive().convention(recursive)
+            task.outputFormat.convention(defaultOutputFormat)
+            task.getOutputFile().convention(reporting.baseDirectory.zip(task.getOutputFormat(), { dir, outputFormat ->
+                RegularFile result = null
                 switch(outputFormat) {
-                    case "html":
+                    case OutputFormat.html:
-                        Paths.get(project.buildDir.path, "jpms-report.html")
+                        result = dir.file( "jpms-report.html")
                         break
-                    case "json":
+                    case OutputFormat.json:
-                        Paths.get(project.buildDir.path, "jpms-report.json")
+                        result = dir.file( "jpms-report.json")
                         break
-                    default:
-                        throw new IllegalArgumentException("Unsupported output format: $outputFormat")
-                }
-            }
-            task.doLast {
-                Stream<Project> projects = Stream.of(project)
-                if(recursive) {
-                    projects = Stream.concat(projects, project.subprojects.stream())
-                }
-                Set<CheckResult> results = projects.flatMap {
-                    Configuration requestedConfiguration = (project.configurations.<Configuration>find { Configuration cfg ->
-                        cfg.canBeResolved && cfg.name == cfgName
-                    } ?: {
-                        def resolvableConfigurations = "[" + project.configurations
-                                .grep { Configuration cfg -> cfg.canBeResolved }
-                                .collect { "'${it.name}'" }
-                                .join(",") + "]"
-                        throw new GradleException("Configuration '$cfgName' doesn't exist or cannot be resolved, " +
-                                "resolvable configurations in this project are " + resolvableConfigurations)
-                    }) as Configuration
-                    computeResults(requestedConfiguration.incoming.artifacts.artifacts.stream())
-                }.collect(Collectors.toSet())
-                Files.createDirectories(outputFile.parent)
-                Files.newBufferedWriter(outputFile).withWriter {
-                    Stream<CheckResult> resultStream = results.stream().sorted(Comparator.<CheckResult, String>comparing { CheckResult res ->
-                        res.dep.id.componentIdentifier.displayName
-                    })
-                    switch(outputFormat) {
-                        case "html":
-                            createHtmlReport(project, resultStream, it)
-                            break
-                        case "json":
-                            createJsonReport(resultStream, it)
-                            break
-                        default:
-                            throw new IllegalArgumentException("Unsupported output format: $outputFormat")
-                    }
-                }
                 }
+                result
+            }))
         }
     }
 }

jpms-check/src/main/groovy/net/woggioni/gradle/jpms/check/JPMSCheckTask.groovy

@@ -0,0 +1,213 @@
+package net.woggioni.gradle.jpms.check
+
+import groovy.json.JsonBuilder
+import groovy.transform.Canonical
+import groovy.transform.CompileStatic
+import groovy.xml.MarkupBuilder
+import org.gradle.api.DefaultTask
+import org.gradle.api.GradleException
+import org.gradle.api.Project
+import org.gradle.api.artifacts.Configuration
+import org.gradle.api.artifacts.result.ResolvedArtifactResult
+import org.gradle.api.file.RegularFileProperty
+import org.gradle.api.provider.Property
+import org.gradle.api.tasks.Input
+import org.gradle.api.tasks.OutputFile
+import org.gradle.api.tasks.TaskAction
+
+import java.nio.file.Files
+import java.nio.file.Path
+import java.util.jar.JarFile
+import java.util.stream.Collectors
+import java.util.stream.Stream
+import java.util.zip.ZipFile
+
+abstract class JPMSCheckTask extends DefaultTask {
+
+    @Input
+    abstract Property<String> getConfigurationName()
+
+    @Input
+    abstract Property<Boolean> getRecursive()
+
+    @Input
+    abstract Property<OutputFormat> getOutputFormat()
+
+    @OutputFile
+    abstract RegularFileProperty getOutputFile()
+
+    @Canonical
+    @CompileStatic
+    private class CheckResult {
+        ResolvedArtifactResult dep
+        String automaticModuleName
+        boolean multiReleaseJar
+        boolean moduleInfo
+
+        boolean getJpmsFriendly() {
+            return automaticModuleName != null || moduleInfo
+        }
+
+        @Override
+        boolean equals(Object other) {
+            if(other == null) {
+                return false
+            } else if(other.class == CheckResult.class) {
+                return dep?.id?.componentIdentifier == ((CheckResult) other).dep?.id?.componentIdentifier
+            } else {
+                return false
+            }
+        }
+
+        @Override
+        int hashCode() {
+            return dep.id.componentIdentifier.hashCode()
+        }
+    }
+
+    @CompileStatic
+    private Stream<CheckResult> computeResults(Stream<ResolvedArtifactResult> artifacts) {
+        return artifacts.filter { ResolvedArtifactResult res ->
+            res.file.exists() && res.file.name.endsWith(".jar")
+        }.<CheckResult>map { resolvedArtifact ->
+            JarFile jarFile = new JarFile(resolvedArtifact.file).with {
+                if (it.isMultiRelease()) {
+                    new JarFile(
+                            resolvedArtifact.file,
+                            false,
+                            ZipFile.OPEN_READ,
+                            Runtime.version()
+                    )
+                } else {
+                    it
+                }
+            }
+            String automaticModuleName = jarFile.manifest?.with {it.mainAttributes.getValue("Automatic-Module-Name") }
+            def moduleInfoEntry = jarFile.getJarEntry("module-info.class")
+            new CheckResult(
+                    resolvedArtifact,
+                    automaticModuleName,
+                    jarFile.isMultiRelease(),
+                    moduleInfoEntry != null
+            )
+        }
+    }
+
+    private void createHtmlReport(Project project, Stream<CheckResult> checkResults, Writer writer) {
+        def builder = new MarkupBuilder(writer)
+        int friendly = 0
+        int total = 0
+        def results = checkResults.peek { CheckResult res ->
+            total += 1
+            if(res.jpmsFriendly) friendly += 1
+        }.collect(Collectors.toList())
+        builder.html {
+            head {
+                meta name: "viewport", content: "width=device-width, initial-scale=1"
+                InputStream resourceStream = getClass().classLoader.getResourceAsStream('net/woggioni/plugins/jpms/check/github-markdown.css')
+                resourceStream.withReader { Reader reader ->
+                    style reader.text
+                }
+                body {
+                    article(class: 'markdown-body') {
+                        h1 "Project ${project.group}:${project.name}:${project.version}", style: "text-align: center;"
+                        div {
+                            table {
+                                thead {
+                                    tr {
+                                        th "JPMS friendly"
+                                        th "Not JPMS friendly", colspan: 2
+                                        th "Total", colspan: 2
+                                    }
+                                }
+                                tbody {
+                                    tr {
+                                        td friendly, style: "text-align: center;"
+                                        td total - friendly, style: "text-align: center;", colspan: 2
+                                        td total, style: "text-align: center;", colspan: 2
+                                    }
+                                }
+                                thead {
+                                    th "Name"
+                                    th "Multi-release jar"
+                                    th "Automatic-Module-Name"
+                                    th "Module descriptor"
+                                    th "JPMS friendly"
+                                }
+                                tbody {
+                                    results.forEach {res ->
+                                        String color = res.jpmsFriendly ? "#dfd" : "fdd"
+                                        tr(style: "background-color:$color;") {
+                                            td res.dep.id.displayName
+                                            td style: "text-align: center;", res.multiReleaseJar ? "✓" : "✕"
+                                            td style: "text-align: center;", res.automaticModuleName ?: "n/a"
+                                            td style: "text-align: center;", res.moduleInfo ? "✓" : "✕"
+                                            td style: "text-align: center;", res.jpmsFriendly ? "✓" : "✕"
+                                        }
+                                        total += 1
+                                        if(res.jpmsFriendly) friendly += 1
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    @CompileStatic
+    private createJsonReport(Stream<CheckResult> checkResults, Writer writer) {
+        def builder = new JsonBuilder()
+        builder (checkResults.map {
+            [
+                    name: it.dep.id.componentIdentifier.displayName,
+                    automaticModuleName: it.automaticModuleName,
+                    isMultiReleaseJar: it.multiReleaseJar,
+                    hasModuleInfo: it.moduleInfo,
+                    jpmsFriendly: it.jpmsFriendly
+            ]
+        }.collect(Collectors.toList()))
+        builder.writeTo(writer)
+    }
+
+    @TaskAction
+    @CompileStatic
+    def createReport() {
+        String cfgName = configurationName.get()
+        Path outputFile = outputFile.get().asFile.toPath()
+        Stream<Project> projects = Stream.of(project)
+        if(recursive.get()) {
+            projects = Stream.concat(projects, project.subprojects.stream())
+        }
+        Set<CheckResult> results = projects.flatMap {
+            Configuration requestedConfiguration = (project.configurations.<Configuration>find { Configuration cfg ->
+                cfg.canBeResolved && cfg.name == cfgName
+            } ?: {
+                def resolvableConfigurations = "[" + project.configurations
+                        .grep { Configuration cfg -> cfg.canBeResolved }
+                        .collect { "'${it.name}'" }
+                        .join(",") + "]"
+                throw new GradleException("Configuration '$cfgName' doesn't exist or cannot be resolved, " +
+                        "resolvable configurations in this project are " + resolvableConfigurations)
+            }) as Configuration
+            computeResults(requestedConfiguration.incoming.artifacts.artifacts.stream())
+        }.collect(Collectors.toSet())
+        Files.createDirectories(outputFile.parent)
+        Files.newBufferedWriter(outputFile).withWriter {
+            Stream<CheckResult> resultStream = results.stream().sorted(Comparator.<CheckResult, String>comparing { CheckResult res ->
+                res.dep.id.componentIdentifier.displayName
+            })
+            switch(outputFormat.get()) {
+                case OutputFormat.html:
+                    createHtmlReport(project, resultStream, it)
+                    break
+                case OutputFormat.json:
+                    createJsonReport(resultStream, it)
+                    break
+                default:
+                    throw new IllegalArgumentException("Unsupported output format: $outputFormat")
+            }
+        }
+    }
+}

jpms-check/src/main/groovy/net/woggioni/gradle/jpms/check/OutputFormat.groovy

@@ -0,0 +1,5 @@
+package net.woggioni.gradle.jpms.check
+
+enum OutputFormat {
+    html, json
+}

lombok/src/main/java/net/woggioni/gradle/lombok/Delombok.java

@@ -1,8 +1,18 @@
 package net.woggioni.gradle.lombok;
 
-import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import org.gradle.api.artifacts.Configuration;
+import org.gradle.api.file.FileCollection;
+import org.gradle.api.file.RegularFileProperty;
+import org.gradle.api.file.SourceDirectorySet;
+import org.gradle.api.provider.Property;
+import org.gradle.api.provider.Provider;
+import org.gradle.api.tasks.InputFiles;
+import org.gradle.api.tasks.Internal;
 import org.gradle.api.tasks.JavaExec;
 import org.gradle.api.tasks.OutputDirectory;
+import org.gradle.api.tasks.SourceSet;
+import org.gradle.internal.jvm.JavaModuleDetector;
 
 import javax.inject.Inject;
 import java.io.File;
@@ -10,12 +20,10 @@ import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
 
-public class Delombok extends JavaExec {
+@RequiredArgsConstructor(onConstructor_ = {@Inject})
-
+public abstract class Delombok extends JavaExec {
-    @Getter
-    @OutputDirectory
-    private final File outputDir;
 
+    private final JavaModuleDetector javaModuleDetector;
     private static String buildClasspathString(Iterable<File> classpath) {
         StringBuilder sb = new StringBuilder();
         Iterator<File> it = classpath.iterator();
@@ -33,19 +41,56 @@ public class Delombok extends JavaExec {
         return sb.toString();
     }
 
-    @Inject
+    @InputFiles
-    public Delombok(File lombokJar, File outputDir, Iterable<File> sourceDirs, String classpath) {
+    public Provider<FileCollection> getSourceClasspath() {
-        this.outputDir = outputDir;
+        return getSourceSet()
-        classpath(lombokJar);
+                .map(SourceSet::getCompileClasspath);
+    }
+
+    @Internal
+    abstract public Property<SourceSet> getSourceSet();
+    @Internal
+    abstract public Property<Configuration> getLombokJar();
+    @Internal
+    abstract public Property<Boolean> getInferModulePath();
+    @OutputDirectory
+    abstract public RegularFileProperty getOutputDir();
+    @InputFiles
+    public Provider<FileCollection> getInputFiles() {
+        return getSourceSet()
+            .map(SourceSet::getAllSource)
+            .map(SourceDirectorySet::getSourceDirectories)
+            .zip(getLombokJar(), FileCollection::plus);
+    }
+
+
+    @Override
+    public void exec() {
+        classpath(getLombokJar());
         List<String> args = new ArrayList<>();
         args.add("delombok");
         args.add("-d");
-        args.add(outputDir.getPath());
+        args.add(getOutputDir().getAsFile().get().getPath());
+        SourceSet sourceSet = getSourceSet().get();
+        Boolean inferModulePath = getInferModulePath().get();
+        FileCollection classpath = javaModuleDetector.inferClasspath(inferModulePath, sourceSet.getCompileClasspath());
+        if(!classpath.isEmpty()) {
             args.add("-c");
-        args.add(classpath);
+            args.add(classpath.getAsPath());
-        for(File sourceDir : sourceDirs) args.add(sourceDir.getPath());
+        }
+        if(inferModulePath) {
+            FileCollection modulepath = javaModuleDetector.inferModulePath(true, sourceSet.getCompileClasspath());
+            if(!modulepath.isEmpty()) {
+                args.add("--module-path");
+                args.add(modulepath.getAsPath());
+            }
+        }
+        for(File sourceDir : sourceSet.getJava().getSrcDirs()) {
+            args.add(sourceDir.getPath());
+        }
         Object[] argsArray = new String[args.size()];
         args.toArray(argsArray);
         args(argsArray);
+        super.exec();
     }
 }

lombok/src/main/java/net/woggioni/gradle/lombok/LombokExtension.java

@@ -1,13 +1,7 @@
 package net.woggioni.gradle.lombok;
 
-import lombok.Getter;
-import lombok.RequiredArgsConstructor;
 import org.gradle.api.provider.Property;
 
-import javax.inject.Inject;
+abstract public class LombokExtension {
-
+    abstract public Property<String> getVersion();
-@RequiredArgsConstructor(onConstructor_ = { @Inject })
-public class LombokExtension {
-    @Getter
-    private final Property<String> version;
 }

lombok/src/main/java/net/woggioni/gradle/lombok/LombokPlugin.java

@@ -6,7 +6,7 @@ import org.gradle.api.Project;
 import org.gradle.api.Task;
 import org.gradle.api.artifacts.Configuration;
 import org.gradle.api.artifacts.dsl.DependencyHandler;
-import org.gradle.api.model.ObjectFactory;
+import org.gradle.api.plugins.ExtraPropertiesExtension;
 import org.gradle.api.plugins.JavaPlugin;
 import org.gradle.api.plugins.JavaPluginExtension;
 import org.gradle.api.provider.Provider;
@@ -27,20 +27,20 @@ public class LombokPlugin implements Plugin<Project> {
     @Override
     public void apply(Project project) {
         project.getPluginManager().apply(JavaPlugin.class);
-        ObjectFactory objectFactory = project.getObjects();
+        LombokExtension ext = project.getExtensions().create("lombok", LombokExtension.class);
-        LombokExtension ext = project.getExtensions()
+        ExtraPropertiesExtension epe = project.getExtensions().getExtraProperties();
-                .create("lombok", LombokExtension.class,
+        if(epe.has("version.lombok")) {
-                        objectFactory.property(String.class)
+            ext.getVersion().convention(
-                            .convention(project.provider(
+                project.provider(() -> (String) epe.get("version.lombok"))
-                                    () -> (String) project.getExtensions().getExtraProperties().get("version.lombok")))
             );
-        project.afterEvaluate(p -> {
+        }
-            SourceSetContainer sourceSetContainer = project.getExtensions().findByType(JavaPluginExtension.class).getSourceSets();
+        JavaPluginExtension javaPluginExtension = project.getExtensions().findByType(JavaPluginExtension.class);
-            Provider<Map<String, String>> dependencyNotationProvider = project.provider(() -> {
+        SourceSetContainer sourceSetContainer = javaPluginExtension.getSourceSets();
+        Provider<Map<String, String>> dependencyNotationProvider = ext.getVersion().map((String version) -> {
              Map<String, String> m = new HashMap<>();
              m.put("group", "org.projectlombok");
              m.put("name", "lombok");
-                 m.put("version", ext.getVersion().get());
+             m.put("version", version);
              return Collections.unmodifiableMap(m);
         });
         Configuration lombokConfiguration = project.getConfigurations().create("lombok");
@@ -69,21 +69,18 @@ public class LombokPlugin implements Plugin<Project> {
                 String delombokTaskName = "delombok" + ss.getName().substring(0, 1).toUpperCase() + ss.getName().substring(1);
                 File outputDir = new File(new File(project.getBuildDir(), "delombok"), ss.getName());
                 Javadoc javadoc = (Javadoc) javadocTask;
-                    TaskProvider<Delombok> delombokTaskProvider = tasks.register(delombokTaskName,
+                TaskProvider<Delombok> delombokTaskProvider = tasks.register(delombokTaskName, Delombok.class, (delombok -> {
-                            Delombok.class,
+                    delombok.getSourceSet().set(ss);
-                            lombokConfiguration.getSingleFile(),
+                    delombok.getOutputDir().set(outputDir);
-                            outputDir,
+                    delombok.getLombokJar().set(lombokConfiguration);
-                            ss.getJava().getSrcDirs(),
+                    // Disabled for now due to https://github.com/projectlombok/lombok/issues/2829
-                            ss.getCompileClasspath().getAsPath()
+                    //delombok.getInferModulePath().set(javaPluginExtension.getModularity().getInferModulePath());
-                    );
+                    delombok.getInferModulePath().set(false);
-                    delombokTaskProvider.configure(delombokTask -> {
+                }));
-                        delombokTask.getInputs().files(ss.getAllSource().getSourceDirectories());
-                    });
                 javadoc.setSource(outputDir);
                 javadoc.getInputs().files(delombokTaskProvider);
             }
         }
-            JavaPluginExtension javaPluginExtension = project.getExtensions().findByType(JavaPluginExtension.class);
         JavaToolchainSpec toolchain = javaPluginExtension.getToolchain();
         if(toolchain.getLanguageVersion().isPresent()) {
             project.afterEvaluate((Project pro) -> {
@@ -98,6 +95,5 @@ public class LombokPlugin implements Plugin<Project> {
                 t.getOptions().getForkOptions().getJvmArgs().add("--illegal-access=permit");
             });
         }
-        });
     }
 }

multi-release-jar/build.gradle

@@ -1,6 +1,6 @@
 plugins {
     id 'maven-publish'
-    id 'groovy-gradle-plugin'
+    id 'java-gradle-plugin'
 }
 
 gradlePlugin {

multi-release-jar/src/main/groovy/net/woggioni/gradle/multi/release/jar/MultiReleaseJarPlugin.groovy

@@ -1,198 +0,0 @@
-package net.woggioni.gradle.multi.release.jar
-
-import org.gradle.api.GradleException
-import org.gradle.api.JavaVersion
-import org.gradle.api.Plugin
-import org.gradle.api.Project
-import org.gradle.api.artifacts.Configuration
-import org.gradle.api.attributes.LibraryElements
-import org.gradle.api.attributes.java.TargetJvmVersion
-import org.gradle.api.file.FileCollection
-import org.gradle.api.file.SourceDirectorySet
-import org.gradle.api.internal.plugins.DslObject
-import org.gradle.api.model.ObjectFactory
-import org.gradle.api.plugins.JavaPlugin
-import org.gradle.api.plugins.JavaPluginExtension
-import org.gradle.api.provider.ListProperty
-import org.gradle.api.provider.Provider
-import org.gradle.api.tasks.*
-import org.gradle.api.tasks.compile.JavaCompile
-import org.gradle.jvm.tasks.Jar
-import org.gradle.process.CommandLineArgumentProvider
-
-import java.lang.module.ModuleDescriptor
-import java.util.jar.JarFile
-import java.util.stream.Collectors
-import java.util.zip.ZipFile
-
-import static org.gradle.api.attributes.LibraryElements.JAR
-import static org.gradle.api.attributes.LibraryElements.LIBRARY_ELEMENTS_ATTRIBUTE
-
-class MultiReleaseJarPlugin implements Plugin<Project> {
-
-    private static void jpmsModuleName(File file) {
-        JarFile jarFile = new JarFile(file).with {
-            if (it.isMultiRelease()) {
-                new JarFile(
-                        file,
-                        false,
-                        ZipFile.OPEN_READ,
-                        Runtime.version()
-                )
-            } else {
-                it
-            }
-        }
-        String automaticModuleName = jarFile.manifest?.with {it.mainAttributes.getValue("Automatic-Module-Name") }
-        def moduleInfoEntry = jarFile.getJarEntry("module-info.class")
-        moduleInfoEntry
-                ?.with(jarFile.&getInputStream)
-                ?.withCloseable(ModuleDescriptor.&read) ?: automaticModuleName
-        ModuleDescriptor.read()
-    }
-
-//    @Canonical
-    static class CompilerArgumentProvider implements CommandLineArgumentProvider {
-
-        private final Project project
-
-        private final ObjectFactory objects
-
-        @Input
-        final Provider<String> jpmsModuleName
-
-        private final Map<String, ListProperty<String>> patchModules
-
-        @InputFiles
-        @CompileClasspath
-        final FileCollection sourceSetOutput
-
-//        @InputFiles
-//        FileCollection getPatchModules() {
-//            return project.files(patchModules.entrySet().stream().flatMap {
-//                it.getValue().get().stream()
-//            }.toArray(String::new))
-//        }
-
-        CompilerArgumentProvider(
-            Project project,
-            ObjectFactory objects,
-            Provider<String> jpmsModuleName,
-            Map<String, ListProperty<String>> patchModules,
-            FileCollection sourceSetOutput) {
-            this.project = project
-            this.objects = objects
-            this.jpmsModuleName = jpmsModuleName
-            this.patchModules = patchModules
-            this.sourceSetOutput = sourceSetOutput
-        }
-
-        @Override
-        Iterable<String> asArguments() {
-            Map<String, ListProperty<String>> patchModules = new HashMap<>(patchModules)
-
-            String name = jpmsModuleName.get()
-            if(name) {
-                patchModules.computeIfAbsent(name) {
-                    objects.listProperty(String.class).convention(new ArrayList<String>())
-                }.addAll(sourceSetOutput.collect { it.toString() })
-            } else {
-                throw new GradleException("Missing property 'jpms.module.name'")
-            }
-            String sep = System.getProperty('path.separator')
-            List<String> result = new ArrayList<>()
-            for(Map.Entry<String, ListProperty<String>> entry : patchModules.entrySet()) {
-                String arg = entry.getValue().get().stream().collect(Collectors.joining(sep))
-                result += '--patch-module'
-                result += "${entry.getKey()}=${arg}"
-            }
-            result
-        }
-    }
-
-    @Override
-    void apply(Project project) {
-        project.pluginManager.apply(JavaPlugin)
-        MultiReleaseJarPluginExtension mrjpe = new MultiReleaseJarPluginExtension(project.objects)
-        project.extensions.add('multiReleaseJar', mrjpe)
-        JavaPluginExtension javaPluginExtension = project.extensions.findByType(JavaPluginExtension.class)
-        JavaVersion binaryVersion = javaPluginExtension.targetCompatibility ?: javaPluginExtension.toolchain?.with {
-            it.languageVersion.get()
-        } ?: JavaVersion.current()
-        if(binaryVersion > JavaVersion.VERSION_1_8) {
-            Configuration compileClasspathConfiguration = project.configurations.compileClasspath
-            project.configurations.named(JavaPlugin.COMPILE_CLASSPATH_CONFIGURATION_NAME) {
-                attributes {
-                    attribute(LIBRARY_ELEMENTS_ATTRIBUTE, project.objects.named(LibraryElements.class, JAR))
-                }
-            }
-
-            SourceSet mainSourceSet = (project.sourceSets.main as SourceSet)
-            JavaCompile compileJavaTask = project.tasks.named(JavaPlugin.COMPILE_JAVA_TASK_NAME, JavaCompile).get()
-            compileJavaTask.configure {
-                options.release.set(JavaVersion.VERSION_1_8.majorVersion.toInteger())
-            }
-            Jar jarTask = project.tasks.named(JavaPlugin.JAR_TASK_NAME, Jar).get()
-            jarTask.configure {
-                manifest.attributes('Multi-Release': 'true')
-            }
-            ArrayList<FileCollection> compileOutputs = new ArrayList<>()
-            compileOutputs << compileJavaTask.outputs.files
-            ArrayList<FileCollection> sourcePaths = new ArrayList<>()
-            sourcePaths << mainSourceSet.java.sourceDirectories
-            Arrays.stream(JavaVersion.values()).filter {
-                it > JavaVersion.VERSION_1_8 && it <= binaryVersion
-            }.forEach {javaVersion ->
-                SourceDirectorySet sourceDirectorySet =
-                        project.objects.sourceDirectorySet("java${javaVersion.majorVersion}", javaVersion.toString())
-                sourceDirectorySet.with {
-                    srcDir(new File(project.projectDir, "src/${mainSourceSet.name}/${sourceDirectorySet.name}"))
-                    destinationDirectory.set(new File(project.buildDir, "classes/${mainSourceSet.name}/${sourceDirectorySet.name}"))
-                    sourcePaths << sourceDirectories
-                }
-                new DslObject(mainSourceSet).getConvention().getPlugins().put(sourceDirectorySet.name, sourceDirectorySet)
-                mainSourceSet.getExtensions().add(SourceDirectorySet.class, sourceDirectorySet.name, sourceDirectorySet)
-                TaskProvider<JavaCompile> compileTask = project.tasks.register(JavaPlugin.COMPILE_JAVA_TASK_NAME + javaVersion.majorVersion, JavaCompile, { javaCompileTask ->
-                    javaCompileTask.options.release.set(javaVersion.majorVersion.toInteger())
-                    javaCompileTask.classpath = compileClasspathConfiguration + compileOutputs.stream().reduce { fc1, fc2 -> fc1 + fc2 }.get()
-                    javaCompileTask.options.compilerArgumentProviders.add(
-                        new CompilerArgumentProvider(
-                            project,
-                            project.objects,
-                            project.provider {
-                                project.hasProperty("jpms.module.name") ?
-                                    project.property("jpms.module.name") : null
-                            },
-                            mrjpe.patchModules,
-                            mainSourceSet.output
-                        )
-                    )
-                    javaCompileTask.source = sourceDirectorySet
-                    javaCompileTask.destinationDirectory.set(sourceDirectorySet.destinationDirectory)
-                    javaCompileTask.options.annotationProcessorPath = mainSourceSet.annotationProcessorPath
-                    javaCompileTask.modularity.inferModulePath = javaPluginExtension.modularity.inferModulePath
-                    javaCompileTask.options.sourcepath = sourcePaths.stream().reduce { fc1, fc2 -> fc1 + fc2 }.get()
-                    javaCompileTask.javaCompiler = compileJavaTask.javaCompiler
-                })
-                compileOutputs << compileTask.get().outputs.files
-                sourceDirectorySet.compiledBy(compileTask, { it.getDestinationDirectory()})
-                jarTask.configure {
-                    from(compileTask.get().destinationDirectory) {
-                        into("META-INF/versions/${javaVersion.majorVersion}")
-                    }
-                }
-
-            }
-            SourceSet testSourceSet = (project.sourceSets.test as SourceSet)
-            testSourceSet.compileClasspath += compileOutputs.stream().reduce { fc1, fc2 -> fc1 + fc2 }.get()
-            testSourceSet.runtimeClasspath += compileOutputs.stream().reduce { fc1, fc2 -> fc1 + fc2 }.get()
-
-            ["apiElements", "runtimeElements"].forEach { String name ->
-                Configuration conf = project.configurations.getByName(name)
-                conf.attributes {
-                    attribute(TargetJvmVersion.TARGET_JVM_VERSION_ATTRIBUTE, compileJavaTask.options.release.get())
-                }
-            }
-        }
-    }
-}

multi-release-jar/src/main/java/net/woggioni/gradle/multi/release/jar/MultiReleaseJarPlugin.java

@@ -0,0 +1,217 @@
+package net.woggioni.gradle.multi.release.jar;
+
+import lombok.Getter;
+import org.gradle.api.GradleException;
+import org.gradle.api.JavaVersion;
+import org.gradle.api.Plugin;
+import org.gradle.api.Project;
+import org.gradle.api.artifacts.Configuration;
+import org.gradle.api.attributes.LibraryElements;
+import org.gradle.api.attributes.java.TargetJvmVersion;
+import org.gradle.api.file.FileCollection;
+import org.gradle.api.file.SourceDirectorySet;
+import org.gradle.api.plugins.JavaPlugin;
+import org.gradle.api.plugins.JavaPluginExtension;
+import org.gradle.api.provider.MapProperty;
+import org.gradle.api.provider.Property;
+import org.gradle.api.provider.Provider;
+import org.gradle.api.tasks.CompileClasspath;
+import org.gradle.api.tasks.Input;
+import org.gradle.api.tasks.InputFiles;
+import org.gradle.api.tasks.SourceSet;
+import org.gradle.api.tasks.SourceSetContainer;
+import org.gradle.api.tasks.TaskProvider;
+import org.gradle.api.tasks.compile.AbstractCompile;
+import org.gradle.api.tasks.compile.JavaCompile;
+import org.gradle.jvm.tasks.Jar;
+import org.gradle.jvm.toolchain.JavaLanguageVersion;
+import org.gradle.jvm.toolchain.JavaToolchainSpec;
+import org.gradle.process.CommandLineArgumentProvider;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.TreeMap;
+import java.util.stream.Collectors;
+import java.util.stream.StreamSupport;
+
+import static org.gradle.api.attributes.LibraryElements.JAR;
+import static org.gradle.api.attributes.LibraryElements.LIBRARY_ELEMENTS_ATTRIBUTE;
+
+public class MultiReleaseJarPlugin implements Plugin<Project> {
+
+//    @SneakyThrows
+//    private static void jpmsModuleName(File file) {
+//        JarFile jarFile = new JarFile(file);
+//        if (jarFile.isMultiRelease()) {
+//            jarFile = new JarFile(
+//                file,
+//                false,
+//                ZipFile.OPEN_READ,
+//                Runtime.version()
+//            );
+//        }
+//        String automaticModuleName = Optional.ofNullable(jarFile.getManifest())
+//            .map(Manifest::getMainAttributes)
+//            .map(mainAttr -> mainAttr.getValue("Automatic-Module-Name"))
+//            .orElse(null);
+//        Optional<JarEntry> moduleInfoEntry = Optional.ofNullable(jarFile.getJarEntry("module-info.class"));
+//        moduleInfoEntry
+//            .map(jarFile::getInputStream)
+//            .map(ModuleDescriptor::read)
+//            .orElse(automaticModuleName);
+//    }
+
+    static class CompilerArgumentProvider implements CommandLineArgumentProvider {
+
+        @Getter(onMethod_ = {@Input})
+        private final Provider<String> jpmsModuleName;
+
+        @Getter(onMethod_ = {@Input})
+        private final MapProperty<String, List<String>> patchModules;
+
+        @Getter(onMethod_ = {@InputFiles, @CompileClasspath})
+        private final FileCollection sourceSetOutput;   
+
+        public CompilerArgumentProvider(
+            Provider<String> jpmsModuleName,
+            MapProperty<String, List<String>> patchModules,
+            FileCollection sourceSetOutput) {
+            this.jpmsModuleName = jpmsModuleName;
+            this.patchModules = patchModules;
+            this.sourceSetOutput = sourceSetOutput;
+        }
+
+        @Override
+        public Iterable<String> asArguments() {
+            Map<String, List<String>> patchModules = new TreeMap<>(this.patchModules.get());
+
+            if (jpmsModuleName.isPresent()) {
+                String name = jpmsModuleName.get();
+                patchModules.computeIfAbsent(name, k -> new ArrayList<>())
+                    .addAll(
+                        StreamSupport.stream(sourceSetOutput.spliterator(), false)
+                            .map(File::toString)
+                            .collect(Collectors.toList())
+                    );
+            } else {
+                throw new GradleException("Missing property 'jpms.module.name'");
+            }
+            String sep = System.getProperty("path.separator");
+            List<String> result = new ArrayList<>();
+            for (Map.Entry<String, List<String>> entry : patchModules.entrySet()) {
+                String arg = String.join(sep, entry.getValue());
+                result.add("--patch-module");
+                result.add(entry.getKey() + "=" + arg);
+            }
+            return result;
+        }
+    }
+
+    @Override
+    public void apply(Project project) {
+        project.getPluginManager().apply(JavaPlugin.class);
+        MultiReleaseJarPluginExtension mrjpe = project.getObjects().newInstance(MultiReleaseJarPluginExtension.class);
+        project.getExtensions().add("multiReleaseJar", mrjpe);
+        JavaPluginExtension javaPluginExtension = project.getExtensions().findByType(JavaPluginExtension.class);
+        SourceSetContainer ssc = javaPluginExtension.getSourceSets();
+        JavaVersion binaryVersion = Optional.ofNullable(javaPluginExtension.getTargetCompatibility())
+            .or(() -> Optional.ofNullable(javaPluginExtension.getToolchain())
+                .map(JavaToolchainSpec::getLanguageVersion)
+                .filter(Property::isPresent)
+                .map(Property::get)
+                .map(JavaLanguageVersion::asInt)
+                .map(JavaVersion::toVersion)
+            ).orElseGet(JavaVersion::current);
+        if (Comparator.<JavaVersion>naturalOrder().compare(binaryVersion, JavaVersion.VERSION_1_8) > 0) {
+            Configuration compileClasspathConfiguration = project.getConfigurations()
+                .getByName(JavaPlugin.COMPILE_CLASSPATH_CONFIGURATION_NAME);
+            project.getConfigurations().named(JavaPlugin.COMPILE_CLASSPATH_CONFIGURATION_NAME, cfg -> {
+                cfg.attributes(attr -> {
+                    attr.attribute(LIBRARY_ELEMENTS_ATTRIBUTE, project.getObjects().named(LibraryElements.class, JAR));
+                });
+            });
+
+            SourceSet mainSourceSet = ssc.getByName(SourceSet.MAIN_SOURCE_SET_NAME);
+
+            JavaCompile compileJavaTask = project.getTasks()
+                .named(JavaPlugin.COMPILE_JAVA_TASK_NAME, JavaCompile.class, (JavaCompile t) -> {
+                    t.getOptions().getRelease().set(Integer.parseInt(JavaVersion.VERSION_1_8.getMajorVersion()));
+                }).get();
+            Jar jarTask = project.getTasks().named(JavaPlugin.JAR_TASK_NAME, Jar.class, (Jar t) -> {
+                Map<String, String> attrs = new HashMap<>();
+                attrs.put("Multi-Release", "true");
+                t.getManifest().attributes(attrs);
+            }).get();
+            SourceDirectorySet java = mainSourceSet.getJava();
+            ArrayList<FileCollection> compileOutputs = new ArrayList<>();
+            compileOutputs.add(compileJavaTask.getOutputs().getFiles());
+            ArrayList<FileCollection> sourcePaths = new ArrayList<>();
+            sourcePaths.add(java.getSourceDirectories());
+            Comparator<JavaVersion> cmp = Comparator.naturalOrder();
+            Arrays.stream(JavaVersion.values())
+                .filter((JavaVersion jv) -> cmp.compare(jv, JavaVersion.VERSION_1_8) > 0 && cmp.compare(jv, binaryVersion) <= 0)
+                .forEach(javaVersion -> {
+                    SourceDirectorySet sourceDirectorySet = project.getObjects()
+                        .sourceDirectorySet("java" + javaVersion.getMajorVersion(), javaVersion.toString());
+                    sourceDirectorySet.srcDir(new File(project.getProjectDir(),
+                        "src/" + mainSourceSet.getName() + "/" + sourceDirectorySet.getName()));
+                    sourceDirectorySet.getDestinationDirectory().set(
+                        new File(project.getBuildDir(),
+                            "classes/" + mainSourceSet.getName() + "/" + sourceDirectorySet.getName())
+                    );
+                    sourcePaths.add(sourceDirectorySet.getSourceDirectories());
+                    mainSourceSet.getExtensions().add(SourceDirectorySet.class, sourceDirectorySet.getName(), sourceDirectorySet);
+                    TaskProvider<JavaCompile> compileTask =
+                        project.getTasks().register(JavaPlugin.COMPILE_JAVA_TASK_NAME + javaVersion.getMajorVersion(), JavaCompile.class,
+                            (JavaCompile javaCompileTask) -> {
+                                javaCompileTask.getOptions().getRelease().set(Integer.parseInt(javaVersion.getMajorVersion()));
+                                javaCompileTask.setClasspath(compileClasspathConfiguration.plus(
+                                    compileOutputs.stream().reduce(project.getObjects().fileCollection(), FileCollection::plus)));
+                                javaCompileTask.getOptions().getCompilerArgumentProviders().add(
+                                    new CompilerArgumentProvider(
+                                        project.provider(() -> Optional.of("jpms.module.name")
+                                            .filter(project::hasProperty)
+                                            .map(project::property)
+                                            .map(Object::toString)
+                                            .orElse(null)),
+                                        mrjpe.getPatchModules(),
+                                        mainSourceSet.getOutput()
+                                    )
+                                );
+                                javaCompileTask.source(sourceDirectorySet);
+                                javaCompileTask.getDestinationDirectory().set(sourceDirectorySet.getDestinationDirectory());
+                                javaCompileTask.getOptions().setAnnotationProcessorPath(mainSourceSet.getAnnotationProcessorPath());
+                                javaCompileTask.getModularity().getInferModulePath().set(javaPluginExtension.getModularity().getInferModulePath());
+                                javaCompileTask.getOptions().setSourcepath(sourcePaths.stream().reduce(project.files(), FileCollection::plus));
+                                javaCompileTask.getJavaCompiler().set(compileJavaTask.getJavaCompiler());
+                            });
+                    compileOutputs.add(compileTask.get().getOutputs().getFiles());
+                    sourceDirectorySet.compiledBy(compileTask, AbstractCompile::getDestinationDirectory);
+                    jarTask.from(compileTask.get().getDestinationDirectory(), copySpec -> {
+                        copySpec.into("META-INF/versions/" + javaVersion.getMajorVersion());
+                    });
+                });
+
+            SourceSet testSourceSet = ssc.getByName(SourceSet.TEST_SOURCE_SET_NAME);
+            testSourceSet.setCompileClasspath(
+                testSourceSet.getCompileClasspath().plus(compileOutputs.stream().reduce(project.files(), FileCollection::plus))
+            );
+            testSourceSet.setRuntimeClasspath(
+                testSourceSet.getRuntimeClasspath().plus(compileOutputs.stream().reduce(project.files(), FileCollection::plus))
+            );
+            Arrays.asList("apiElements", "runtimeElements").forEach((String name) -> {
+                Configuration conf = project.getConfigurations().getByName(name);
+                conf.attributes(attrs -> {
+                    attrs.attribute(TargetJvmVersion.TARGET_JVM_VERSION_ATTRIBUTE,
+                        compileJavaTask.getOptions().getRelease().get());
+                });
+            });
+        }
+    }
+}

multi-release-jar/src/main/java/net/woggioni/gradle/multi/release/jar/MultiReleaseJarPluginExtension.java

@@ -1,33 +1,41 @@
 package net.woggioni.gradle.multi.release.jar;
 
+import org.gradle.api.Project;
 import org.gradle.api.model.ObjectFactory;
-import org.gradle.api.provider.ListProperty;
+import org.gradle.api.provider.MapProperty;
 import org.gradle.api.provider.Provider;
 
 import javax.inject.Inject;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
-import java.util.Map;
+import java.util.List;
 
 public class MultiReleaseJarPluginExtension {
-
+    private final Provider<List<String>> listCtor;
-    private final ObjectFactory objects;
+    private final MapProperty<String, List<String>> patchModules;
-    private final Map<String, ListProperty<String>> patchModules;
-
     @Inject
-    public MultiReleaseJarPluginExtension(ObjectFactory objects) {
+    public MultiReleaseJarPluginExtension(Project project, ObjectFactory objects) {
-        this.objects = objects;
+        patchModules = objects.mapProperty(String.class,
-        patchModules = new HashMap<>();
+                (Class<List<String>>) ((List<String>) new ArrayList<String>()).getClass());
+        listCtor = project.provider(ArrayList::new);
+    }
+
+    private static <T> List<T> listAdd(List<T> l, T el) {
+        l.add(el);
+        return l;
     }
 
     public void patchModule(String moduleName, Provider<String> path) {
-        this.patchModules
+        Provider<List<String>> listProvider = this.patchModules.getting(moduleName);
-            .computeIfAbsent(moduleName, key -> objects.listProperty(String.class)
+        if(listProvider.isPresent()) {
-            .convention(new ArrayList<>()))
+            patchModules.put(moduleName, listProvider.zip(path, MultiReleaseJarPluginExtension::listAdd));
-            .add(path);
+        } else {
+            patchModules.put(moduleName, listCtor.zip(path, MultiReleaseJarPluginExtension::listAdd));
+        }
     }
 
-    public Map<String, ListProperty<String>> getPatchModules() {
+    public MapProperty<String, List<String>> getPatchModules() {
         return patchModules;
     }
 }

osgi-app/build.gradle

@@ -2,25 +2,6 @@ plugins {
     id "java-gradle-plugin"
 }
 
-childProjects.forEach {name, child ->
-    child.with {
-        apply plugin: 'maven-publish'
-
-        publishing {
-            repositories {
-                maven {
-                    url = woggioniMavenRepositoryUrl
-                }
-            }
-            publications {
-                maven(MavenPublication) {
-                    from(components["java"])
-                }
-            }
-        }
-    }
-}
-
 evaluationDependsOnChildren()
 
 configurations {

osgi-app/osgi-simple-bootstrapper-application/build.gradle

@@ -18,7 +18,9 @@ dependencies {
 }
 
 jar {
+    bundle {
         bnd '''\
             Import-Package: !lombok, *
         '''
+    }
 }

sambal/build.gradle

@@ -0,0 +1,16 @@
+plugins {
+    id 'java-gradle-plugin'
+}
+
+dependencies {
+    implementation catalog.jgit
+}
+
+gradlePlugin {
+    plugins {
+        create("SambalPlugin") {
+            id = "net.woggioni.gradle.sambal"
+            implementationClass = "net.woggioni.gradle.sambal.SambalPlugin"
+        }
+    }
+}

sambal/src/main/java/net/woggioni/gradle/sambal/SambalPlugin.java

@@ -0,0 +1,244 @@
+package net.woggioni.gradle.sambal;
+
+import lombok.Getter;
+import lombok.Setter;
+import lombok.SneakyThrows;
+import org.codehaus.groovy.runtime.MethodClosure;
+import org.eclipse.jgit.api.Git;
+import org.eclipse.jgit.api.Status;
+import org.eclipse.jgit.lib.Ref;
+import org.gradle.api.Action;
+import org.gradle.api.GradleException;
+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.attributes.AttributeContainer;
+import org.gradle.api.java.archives.Attributes;
+import org.gradle.api.plugins.AppliedPlugin;
+import org.gradle.api.plugins.ExtraPropertiesExtension;
+import org.gradle.api.plugins.JavaPlugin;
+import org.gradle.api.plugins.PluginManager;
+import org.gradle.api.provider.Provider;
+import org.gradle.api.provider.ValueSource;
+import org.gradle.api.provider.ValueSourceParameters;
+import org.gradle.api.tasks.TaskContainer;
+import org.gradle.api.tasks.bundling.Jar;
+
+import javax.annotation.Nonnull;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import java.io.Serializable;
+import java.io.StringWriter;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.security.DigestInputStream;
+import java.security.MessageDigest;
+import java.util.List;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+public class SambalPlugin implements Plugin<Project> {
+    private static Pattern tagPattern = Pattern.compile("^refs/tags/v?(\\d+\\.\\d+.*)");
+    final private static char[] hexArray = "0123456789ABCDEF".toCharArray();
+
+    private static String bytesToHex(byte[] bytes) {
+        char[] hexChars = new char[bytes.length * 2];
+        for (int j = 0; j < bytes.length; j++) {
+            int v = bytes[j] & 0xFF;
+            hexChars[j * 2] = hexArray[v >>> 4];
+            hexChars[j * 2 + 1] = hexArray[v & 0x0F];
+        }
+        return new String(hexChars);
+    }
+
+    private static void copyConfigurationAttributes(Configuration source, Configuration destination) {
+        destination.attributes(new Action<AttributeContainer>() {
+            @Override
+            public void execute(@Nonnull AttributeContainer destinationAttributes) {
+                AttributeContainer sourceAttributes = source.getAttributes();
+                for (Attribute attr : sourceAttributes.keySet()) {
+                    destinationAttributes.attribute(attr, Objects.requireNonNull(sourceAttributes.getAttribute(attr)));
+                }
+            }
+        });
+    }
+
+    @SneakyThrows
+    private static String sha256(File f) {
+        byte[] buffer = new byte[0x10000];
+        MessageDigest md = MessageDigest.getInstance("SHA-256");
+        try (InputStream inputStream = new DigestInputStream(new FileInputStream(f), md)) {
+            while (true) {
+                int read = inputStream.read(buffer);
+                if (read < 0) break;
+                md.update(buffer, 0, read);
+            }
+        }
+        return bytesToHex(md.digest());
+    }
+
+    private static Optional<Path> which(String command) {
+        return Stream.of(System.getenv("PATH").split(Pattern.quote(File.pathSeparator)))
+                .map(path -> Paths.get(path, command))
+                .filter(Files::exists)
+                .filter(Files::isExecutable)
+                .findFirst();
+    }
+
+    private static int getVersionInt(Project project) {
+        int result = 0;
+        int scale = 100 * 100;
+        String versionString = project.getVersion().toString();
+        int dash = versionString.indexOf('-');
+        if (dash < 0) {
+            dash = versionString.length();
+        }
+        versionString = versionString.substring(0, dash);
+        for (String part : versionString.split("\\.")) {
+            if (scale >= 1) {
+                result += scale * Integer.parseInt(part);
+                scale /= 100;
+            }
+        }
+        return result;
+    }
+
+    @SneakyThrows
+    private static String runCommand(String... args) {
+        ProcessBuilder pb = new ProcessBuilder(args);
+        pb.redirectError(ProcessBuilder.Redirect.INHERIT);
+        pb.redirectOutput(ProcessBuilder.Redirect.PIPE);
+        Process p = pb.start();
+        p.waitFor();
+        if (p.exitValue() != 0) throw new GradleException("Error invoking subprocess");
+        StringWriter sw = new StringWriter();
+        char[] buffer = new char[0x1024];
+        try (Reader reader = new InputStreamReader(p.getInputStream())) {
+            while (true) {
+                int read = reader.read(buffer);
+                if (read <= 0) break;
+                sw.write(buffer, 0, read);
+            }
+        }
+        return sw.toString();
+    }
+
+    @SneakyThrows
+    private static List<String> getCurrentTag(Git git) {
+        List<Ref> tags = git.tagList().call();
+        Ref currentRef = git.getRepository().findRef("HEAD");
+        List<String> currentTag = tags.stream()
+                .filter(it -> Objects.equals(it.getObjectId(), currentRef.getObjectId()))
+                .map(it -> tagPattern.matcher(it.getName())).filter(Matcher::matches)
+                .map(it -> it.group(1))
+                .collect(Collectors.toList());
+        if (currentTag.isEmpty()) return null;
+        else {
+            return currentTag;
+        }
+    }
+
+    private static String resolveProperty(Project project, String key, String defaultValue) {
+        if (project.hasProperty(key)) return project.property(key).toString();
+        else {
+            String envVarKey = key.replace('.', '_').toUpperCase();
+            String envVarValue = System.getenv().get(envVarKey);
+            if (envVarValue != null) return envVarValue;
+            else return defaultValue;
+        }
+    }
+
+    private static String resolveProperty(Project project, String key) {
+        if (project.hasProperty(key)) return project.property(key).toString();
+        else {
+            String envVarKey = key.replace('.', '_').toUpperCase();
+            String envVarValue = System.getenv().get(envVarKey);
+            if (envVarValue != null) return envVarValue;
+            else {
+                String msg = String.format("Impossible to resolve property '%s'," +
+                        " either add it to Gradle's project properties from the command line using:\n" +
+                        "./gradlew -P%s=someValue\n" +
+                        "or set the environmental variable %s", key, key, envVarKey);
+                throw new GradleException(msg);
+            }
+        }
+    }
+
+    @Getter
+    @Setter
+    public static class ProjectParameters implements ValueSourceParameters, Serializable {
+        private File rootDirectory;
+    }
+
+    public abstract static class GitTagValueSource implements ValueSource<List<String>, ProjectParameters> {
+        @Override
+        @SneakyThrows
+        public List<String> obtain() {
+            File rootDirectory = getParameters().getRootDirectory();
+            try(Git git = Git.open(rootDirectory)) {
+                Status status = git.status().call();
+                if (status.isClean()) {
+                    return getCurrentTag(git);
+                } else {
+                    return null;
+                }
+            }
+        }
+    }
+
+    public abstract static class GitRevisionValueSource implements ValueSource<String, ProjectParameters> {
+
+        @Override
+        @SneakyThrows
+        public String obtain() {
+            File rootDirectory = getParameters().getRootDirectory();
+            try (Git git = Git.open(rootDirectory)) {
+                return git.getRepository().findRef("HEAD").getObjectId().name();
+            }
+        }
+    }
+
+    @Override
+    public void apply(Project project) {
+        ExtraPropertiesExtension ext = project.getRootProject().getExtensions().getExtraProperties();
+        ext.set("getIntegerVersion", new MethodClosure(this, "getVersionInt").curry(project));
+
+
+        final Provider<List<String>> gitTagProvider = project.getProviders().of(GitTagValueSource.class, it -> {
+            it.parameters( params -> params.setRootDirectory(project.getRootDir()));
+        });
+        ext.set("currentTag", gitTagProvider);
+        ext.set("resolveProperty", new MethodClosure(this, "resolveProperty").curry(project));
+        ext.set("copyConfigurationAttributes", new MethodClosure(this, "copyConfigurationAttributes"));
+
+        final Provider<String> gitRevisionProvider = project.getProviders().of(GitRevisionValueSource.class, it -> {
+            it.parameters( params -> params.setRootDirectory(project.getRootDir()));
+        });
+        ext.set("gitRevision", gitRevisionProvider);
+        ext.set("which", new MethodClosure(this, "which").curry(project));
+
+        PluginManager pluginManager = project.getPluginManager();
+        pluginManager.withPlugin("java-library", (AppliedPlugin plugin) -> {
+            TaskContainer tasks = project.getTasks();
+            project.afterEvaluate(p -> {
+                tasks.named(JavaPlugin.JAR_TASK_NAME, Jar.class, jarTask -> {
+                    jarTask.manifest(mf -> {
+                        Attributes attrs = mf.getAttributes();
+                        attrs.put(java.util.jar.Attributes.Name.SPECIFICATION_TITLE.toString(), project.getName());
+                        attrs.put(java.util.jar.Attributes.Name.SPECIFICATION_VERSION.toString(), project.getVersion());
+                        attrs.put(java.util.jar.Attributes.Name.IMPLEMENTATION_VERSION.toString(), gitRevisionProvider);
+                    });
+                });
+            });
+        });
+    }
+}

sambal/src/main/java/net/woggioni/gradle/sambal/SignJarTask.java

@@ -0,0 +1,86 @@
+package net.woggioni.gradle.sambal;
+
+import org.codehaus.groovy.ant.Groovy;
+import org.codehaus.groovy.util.StringUtil;
+import org.gradle.api.DefaultTask;
+import org.gradle.api.file.DirectoryProperty;
+import org.gradle.api.file.RegularFile;
+import org.gradle.api.file.RegularFileProperty;
+import org.gradle.api.plugins.BasePluginExtension;
+import org.gradle.api.plugins.JavaPlugin;
+import org.gradle.api.provider.MapProperty;
+import org.gradle.api.provider.Property;
+import org.gradle.api.provider.Provider;
+import org.gradle.api.tasks.Input;
+import org.gradle.api.tasks.InputFile;
+import org.gradle.api.tasks.Optional;
+import org.gradle.api.tasks.OutputFile;
+import org.gradle.api.tasks.TaskAction;
+import org.gradle.api.tasks.bundling.Jar;
+
+import javax.inject.Inject;
+import java.io.File;
+import java.util.Map;
+import java.util.TreeMap;
+
+abstract class SignJarTask extends DefaultTask {
+    @InputFile
+    public abstract RegularFileProperty getInputJarFile();
+
+    @Input
+    public abstract MapProperty<String,String> getOptions();
+
+    @Input
+    public abstract DirectoryProperty getArchiveDestination();
+
+    @Input
+    public abstract Property<String> getArchiveBaseName();
+
+    @Input
+    public abstract Property<String> getArchiveVersion();
+
+    @Input
+    public abstract Property<String> getArchiveExtension();
+
+    @Input
+    @Optional
+    public abstract Property<String> getArchiveClassifier();
+
+    @OutputFile
+    public Provider<RegularFile> getArchiveFile() {
+        StringBuilder sb = new StringBuilder(getArchiveBaseName().get());
+        sb.append('-').append(getArchiveVersion().get());
+        if(getArchiveClassifier().isPresent() && !getArchiveClassifier().get().isEmpty()) {
+            sb.append('-').append(getArchiveClassifier().get());
+        }
+        sb.append('.').append(getArchiveExtension().get());
+        return getProject().getLayout().file(getArchiveDestination().map(ad ->
+            new File(ad.getAsFile(), sb.toString())
+        ));
+    }
+
+    @Inject
+    public SignJarTask() {
+        BasePluginExtension bpe = getProject()
+            .getExtensions()
+            .getByType(BasePluginExtension.class);
+        getArchiveDestination().convention(bpe.getLibsDirectory());
+        getArchiveBaseName().convention(getProject().getName());
+        getArchiveVersion().convention(getProject().getVersion().toString());
+        getArchiveExtension().convention("jar");
+        getArchiveClassifier().convention("signed");
+        getArchiveClassifier().set("signed");
+        getInputJarFile().convention(
+                getProject().getTasks()
+                .named(JavaPlugin.JAR_TASK_NAME, Jar.class)
+                .flatMap(Jar::getArchiveFile));
+    }
+
+    @TaskAction
+    public void run() {
+        Map<String, String> signingOptions = new TreeMap<>(getOptions().get());
+        signingOptions.put("jar", getInputJarFile().map(RegularFile::getAsFile).get().toString());
+        signingOptions.put("signedJar", getArchiveFile().get().getAsFile().toString());
+        getAnt().invokeMethod("signjar", signingOptions);
+    }
+}

sambal/src/main/java/net/woggioni/gradle/sambal/attribute/Sealing.java

@@ -0,0 +1,53 @@
+package net.woggioni.gradle.sambal.attribute;
+
+import org.gradle.api.Named;
+import org.gradle.api.attributes.Attribute;
+import org.gradle.api.attributes.AttributeCompatibilityRule;
+import org.gradle.api.attributes.AttributeDisambiguationRule;
+import org.gradle.api.attributes.CompatibilityCheckDetails;
+import org.gradle.api.attributes.MultipleCandidatesDetails;
+
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Objects;
+
+public interface Sealing extends Named {
+    Attribute<Sealing> SEALING_ATTRIBUTE = Attribute.of("net.woggioni.gradle.lys.artifact.type", Sealing.class);
+
+    String sealed = "sealed";
+    String open = "open";
+
+    class CompatibilityRules implements AttributeCompatibilityRule<Sealing> {
+        public void execute(CompatibilityCheckDetails<Sealing> details) {
+            Sealing consumerValue = details.getConsumerValue();
+            Sealing producerValue = details.getProducerValue();
+            if (consumerValue == null) {
+                details.compatible();
+            } else if(producerValue == null) {
+                details.incompatible();
+            } else if(Objects.equals(consumerValue.getName(), producerValue.getName())) {
+                details.compatible();
+            } else {
+                details.incompatible();
+            }
+        }
+    }
+
+    class DisambiguationRules implements AttributeDisambiguationRule<Sealing> {
+        private static final List<String> ORDER = Arrays.asList(open, sealed);
+        private static final Comparator<Sealing> comparator =
+                Comparator.comparingInt(sealing -> ORDER.indexOf(sealing.getName()));
+
+        @Override
+        public void execute(MultipleCandidatesDetails<Sealing> details) {
+            if(details.getConsumerValue() == null) {
+                details.closestMatch(null);
+            } else {
+                details.getCandidateValues().stream()
+                        .min(comparator)
+                        .ifPresent(details::closestMatch);
+            }
+        }
+    }
+}

sambal/src/main/java/net/woggioni/gradle/sambal/attribute/Signing.java

@@ -0,0 +1,53 @@
+package net.woggioni.gradle.sambal.attribute;
+
+import org.gradle.api.Named;
+import org.gradle.api.attributes.Attribute;
+import org.gradle.api.attributes.AttributeCompatibilityRule;
+import org.gradle.api.attributes.AttributeDisambiguationRule;
+import org.gradle.api.attributes.CompatibilityCheckDetails;
+import org.gradle.api.attributes.MultipleCandidatesDetails;
+
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Objects;
+
+public interface Signing extends Named {
+    Attribute<Signing> SIGNING_ATTRIBUTE = Attribute.of("net.woggioni.gradle.lys.artifact.signing", Signing.class);
+
+    String signed = "signed";
+    String unsigned = "unsigned";
+
+    class CompatibilityRules implements AttributeCompatibilityRule<Signing> {
+        public void execute(CompatibilityCheckDetails<Signing> details) {
+            Signing consumerValue = details.getConsumerValue();
+            Signing producerValue = details.getProducerValue();
+            if (consumerValue == null) {
+                details.compatible();
+            } else if(producerValue == null) {
+                details.incompatible();
+            } else if(Objects.equals(consumerValue.getName(), producerValue.getName())) {
+                details.compatible();
+            } else {
+                details.incompatible();
+            }
+        }
+    }
+
+    class DisambiguationRules implements AttributeDisambiguationRule<Signing> {
+        private static final List<String> ORDER = Arrays.asList(unsigned, signed);
+        private static final Comparator<Signing> comparator =
+                Comparator.comparingInt(signing -> ORDER.indexOf(signing.getName()));
+
+        @Override
+        public void execute(MultipleCandidatesDetails<Signing> details) {
+            if(details.getConsumerValue() == null) {
+                details.closestMatch(null);
+            } else {
+                details.getCandidateValues().stream()
+                        .min(comparator)
+                        .ifPresent(details::closestMatch);
+            }
+        }
+    }
+}

settings.gradle

@@ -1,7 +1,7 @@
 dependencyResolutionManagement {
     repositories {
         maven {
-            url = 'https://woggioni.net/mvn/'
+            url = getProperty('gitea.maven.url')
             content {
                 includeGroup 'com.lys'
             }
@@ -10,7 +10,6 @@ dependencyResolutionManagement {
     versionCatalogs {
         catalog {
             from group: 'com.lys', name: 'lys-catalog', version: getProperty('lys.catalog.version')
-            version("slf4j", "1.7.36")
         }
     }
 }
@@ -26,3 +25,8 @@ include 'osgi-app:osgi-simple-bootstrapper'
 include 'osgi-app:osgi-simple-bootstrapper-api'
 include 'osgi-app:osgi-simple-bootstrapper-application'
 include 'wildfly'
+include 'sambal'
+include 'graalvm'
+include 'jdeps'
+include 'finalguard'
+include 'finalguard:finalguard-javac-plugin'

wildfly/src/main/java/net/woggioni/gradle/wildfly/Deploy2WildflyTask.java

@@ -1,19 +1,16 @@
 package net.woggioni.gradle.wildfly;
 
-import lombok.Getter;
 import org.gradle.api.file.RegularFileProperty;
-import org.gradle.api.model.ObjectFactory;
 import org.gradle.api.provider.Property;
 import org.gradle.api.provider.Provider;
 import org.gradle.api.tasks.Exec;
 import org.gradle.api.tasks.Input;
 import org.gradle.api.tasks.InputFile;
 
-import javax.annotation.Nonnull;
 import javax.inject.Inject;
 import java.util.Arrays;
 
-public class Deploy2WildflyTask extends Exec {
+public abstract class Deploy2WildflyTask extends Exec {
     private static final String PROPERTY_PREFIX = "net.woggioni.gradle.wildfly.";
     private static final String HOST_PROPERTY_KEY = PROPERTY_PREFIX + "rpcHost";
     private static final String PORT_PROPERTY_KEY = PROPERTY_PREFIX + "rpcPort";
@@ -21,24 +18,21 @@ public class Deploy2WildflyTask extends Exec {
     private static final String PASSWORD_PROPERTY_KEY = PROPERTY_PREFIX + "rpcPassword";
 
     @Input
-    @Getter
+    public abstract Property<String> getRpcHost();
-    private final Property<String> rpcHost;
 
     @Input
-    @Getter
+    public abstract Property<Integer> getRpcPort();
-    private final Property<Integer> rpcPort;
 
     @Input
-    @Getter
+    public abstract Property<String> getRpcUsername();
-    private final Property<String> rpcUsername;
 
     @Input
-    @Getter
+    public abstract Property<String> getRpcPassword();
-    private final Property<String> rpcPassword;
+    @Input
+    public abstract Property<String> getDeploymentName();
 
-    @Getter
     @InputFile
-    private final RegularFileProperty artifact;
+    public abstract RegularFileProperty getArtifact();
 
     private String projectProperty(String key, String defaultValue) {
         String result = (String) getProject().findProperty(key);
@@ -46,7 +40,7 @@ public class Deploy2WildflyTask extends Exec {
     }
 
     @Inject
-    public Deploy2WildflyTask(@Nonnull ObjectFactory objectFactory) {
+    public Deploy2WildflyTask() {
         setGroup("deploy");
         setDescription("Deploy this project artifact to Wildfly application server");
         Provider<String> defaultHostProvider = getProject()
@@ -59,19 +53,21 @@ public class Deploy2WildflyTask extends Exec {
                 .provider(() -> projectProperty(PASSWORD_PROPERTY_KEY, "password"));
 
         executable("/opt/wildfly/bin/jboss-cli.sh");
-        rpcHost = objectFactory.property(String.class).convention(defaultHostProvider);
+        getRpcHost().convention(defaultHostProvider);
-        rpcPort = objectFactory.property(Integer.class).convention(defaultPortProvider);
+        getRpcPort().convention(defaultPortProvider);
-        rpcUsername = objectFactory.property(String.class).convention(defaultUsernameProvider);
+        getRpcUsername().convention(defaultUsernameProvider);
-        rpcPassword = objectFactory.property(String.class).convention(defaultPasswordProvider);
+        getRpcPassword().convention(defaultPasswordProvider);
-        artifact = objectFactory.fileProperty();
+        getDeploymentName().convention(getArtifact().map(it -> it.getAsFile().getName()));
-
         getArgumentProviders().add(() ->
             Arrays.asList(
-                    "--controller=" + rpcHost.get() + ":" + rpcPort.get(),
+                    "--controller=" + getRpcHost().get() + ":" + getRpcPort().get(),
                     "--connect",
-                    "--user=" + rpcUsername.get(),
+                    "--user=" + getRpcUsername().get(),
-                    "--password=" + rpcPassword.get(),
+                    "--password=" + getRpcPassword().get(),
-                    "--command=deploy "  + artifact.getAsFile().get().getPath() + " --force")
+                    "--command=deploy "
+                            + getArtifact().getAsFile().get().getPath()
+                            + " --name=" + getDeploymentName().get()
+                            + " --force")
         );
     }
 }