start working on java and settings conventions plugins

build.gradle

@@ -1,16 +1,14 @@
 
-group = 'org.xbib.gradle.plugin'
-
 wrapper {
     gradleVersion = libs.versions.gradle.get()
-    distributionType = Wrapper.DistributionType.ALL
+    distributionType = Wrapper.DistributionType.BIN
 }
 
 ext {
-    user = 'jprante'
-    name = 'gradle-plugins'
+    name = rootProject.name
     description = 'Gradle plugins'
     inceptionYear = '2021'
+    user = 'jprante'
     url = 'https://github.com/' + user + '/' + name
     scmUrl = 'https://github.com/' + user + '/' + name
     scmConnection = 'scm:git:git://github.com/' + user + '/' + name + '.git'
@@ -20,11 +18,3 @@ ext {
     licenseName = 'The Apache License, Version 2.0'
     licenseUrl = 'http://www.apache.org/licenses/LICENSE-2.0.txt'
 }
-
-subprojects {
-    apply plugin: 'java-library'
-    apply from: rootProject.file('gradle/ide/idea.gradle')
-    apply from: rootProject.file('gradle/compile/java.gradle')
-    apply from: rootProject.file('gradle/test/junit5.gradle')
-    apply from: rootProject.file('gradle/repositories/maven.gradle')
-}

gradle-plugin-asciidoctor/build.gradle

@@ -1,21 +1,24 @@
 plugins {
-    id 'java-gradle-plugin'
     alias(libs.plugins.publish)
 }
 
-apply plugin: 'java-gradle-plugin'
 apply plugin: 'com.gradle.plugin-publish'
 
 apply from: rootProject.file('gradle/compile/groovy.gradle')
+apply from: rootProject.file('gradle/test/junit5.gradle')
 
 dependencies {
-    api gradleApi()
     implementation libs.asciidoctorj
     implementation libs.jruby
-    testImplementation libs.spock.core
-    testImplementation libs.jsoup
+    implementation libs.asm
+    implementation libs.asm.commons
+    implementation libs.asm.util
+    testImplementation platform(testLibs.spock.bom)
+    testImplementation testLibs.spock.core
+    testImplementation testLibs.jsoup
 }
 
+/*
 if (project.hasProperty('gradle.publish.key')) {
     gradlePlugin {
         website = 'https://xbib.org/joerg/gradle-plugins/src/branch/main/gradle-plugin-asciidoctor'
@@ -32,3 +35,4 @@ if (project.hasProperty('gradle.publish.key')) {
         }
     }
 }
+*/

gradle-plugin-asciidoctor/gradle.properties

@@ -1,2 +1,2 @@
 name = gradle-plugin-asciidoctor
-version = 3.0.2
+version = 3.1.0

gradle-plugin-asciidoctor/src/main/groovy/org/xbib/gradle/plugin/asciidoctor/AsciidoctorPlugin.groovy

@@ -21,7 +21,7 @@ class AsciidoctorPlugin implements Plugin<Project> {
         AsciidoctorExtension extension = project.extensions.create(ASCIIDOCTORJ, AsciidoctorExtension, project)
 
         project.afterEvaluate {
-            if(project.extensions.asciidoctorj.addDefaultRepositories) {
+            if (project.extensions.asciidoctorj.addDefaultRepositories) {
                 project.repositories {
                     mavenCentral()
                 }

gradle-plugin-asciidoctor/src/main/groovy/org/xbib/gradle/plugin/asciidoctor/groovydsl/AsciidoctorExtensions.groovy

@@ -174,5 +174,7 @@ class AsciidoctorExtensions {
         )
 
         new GroovyShell(new Binding(), config)
+
+
     }
-}
+}

gradle-plugin-c/LICENSE.txt

@@ -0,0 +1,201 @@
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+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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gradle-plugin-c/NOTICE.txt

@@ -0,0 +1,8 @@
+
+This work is derived from
+
+https://github.com/jjohannes/plain-c
+
+as of January 14, 2024
+
+(Apache License 2.0)

gradle-plugin-c/README.md

@@ -0,0 +1,81 @@
+# C - Gradle plugin
+
+An experimental plugin for customized **C** development with Gradle.
+It showcases how to use tasks that are provided by Gradle core for **C** development,
+such as `org.gradle.language.c.tasks.CCompile`, directly as part of a custom build system.
+This can make sense in a highly customized Gradle build system where specific (and multiple) **C** compilation/assembling/linking
+steps are part of a larger build pipeline with other custom Gradle tasks.
+
+The plugin provides an extension called `c` to:
+
+- Set the `targetPlatform` property of a task to a generic platform via `targetPlatform.set(c.platform())`
+- Set the `toolChain` property of a task to a locally installed tool via `toolChain.set(c.localTool("version", "/path/to/tool", ".o"))`
+- Set the `toolChain` property of a task to a tool located in a ZIP file in a Maven repository via `toolChain.set(c.repositoryTool("group", "name", "version", "path/in/zip", ".o"))`
+
+## Example
+
+```
+plugins {
+    id 'org.xbib.gradle.plugin.c"
+}
+
+tasks.register<CCompile>("compileC") {
+    toolChain.set(c.localTool("14.0.0", "/usr/bin/clang", ".o"))
+    targetPlatform.set(c.platform())
+
+    source(layout.projectDirectory.files("src/c").asFileTree)
+    includes(layout.projectDirectory.files("src/headers"))
+    compilerArgs.add("-S")
+
+    objectFileDir.set(layout.buildDirectory.dir("out/o"))
+}
+
+val compileC2 = tasks.register<CCompile>("compileC2") {
+    toolChain.set(c.repositoryTool("com.example", "vendor-x", "1.2", "bin/xcc", ".src"))
+    targetPlatform.set(c.platform())
+
+    source(layout.projectDirectory.files("src/c-special").asFileTree)
+    includes(layout.projectDirectory.files("src/headers"))
+
+    objectFileDir.set(layout.buildDirectory.dir("out/src"))
+}
+
+tasks.register<Assemble>("assembleC2") {
+    toolChain.set(c.repositoryTool("com.example", "vendor-x", "1.2", "bin/xas", ".o"))
+    targetPlatform.set(c.platform())
+
+    source(compileC2.map { it.objectFileDir.asFileTree })
+    includes(layout.projectDirectory.files("src/headers"))
+    assemblerArgs = listOf("-D")
+
+    objectFileDir = layout.buildDirectory.dir("out/o2").get().asFile
+}
+```
+
+## How does this work?
+
+In order to fully configure one of the native tasks of Gradle (such as `org.gradle.language.c.tasks.CCompile`),
+you require a **NativeToolchain** (instance of `org.gradle.nativeplatform.toolchain.NativeToolChain`)
+and a **TargetPlatform** (instance of `org.gradle.nativeplatform.platform.NativePlatform`).
+Gradle's own [native languages plugins](https://docs.gradle.org/current/userguide/plugin_reference.html#native_languages)
+pre-configure these task properties through the so-called _native toolchain registry_.
+This allows, for example, to compile the same code for multiple target platforms with different tools in the same build.
+This is great, if this is what you need. However, in a scenario where we do not care about this feature and would rather register
+tasks directly, we miss flexibility as the _native toolchain registry_ in Gradle is not very flexible right now and makes it difficult or impossible to register
+your own tools (and it has not been improved for several years).
+
+The [CExtension.java](src/main/java/org/xbib/gradle/plugin/c/CExtension.java) class now allows you to
+set the `targetPlatform` and `toolChain` properties of any task without the _native toolchain registry_.
+It does so by utilising internal Gradle APIs to:
+- Construct a generic `NativePlatform` object. This is the same everywhere and will be ignored during tool selection.
+  In our scenario, we do not care about different platforms.
+- Construct a `NativeToolChain` instance based on a concrete executable. Either by providing a concrete path to
+  an executable (`localTool(...)`) or coordinates pointing at a ZIP file in a Maven repository (`repositoryTool(...)`).
+  In the latter case, Gradle's dependency management is used to find, download, extract and cache the tool.
+
+Behind the custom `NativeToolChain` implementation is a custom `PlatformToolProvider` implementation and extensions of
+Gradle's `NativeCompiler` implementations. This allows for more customization and extension of Gradle's functionality
+in this area. This uses a lot of APIs from `internal` packages. Which, however, have not been touched for years.
+
+This showcase could help to determine which APIs in this area should probably be public.
+

gradle-plugin-c/build.gradle

@@ -0,0 +1,30 @@
+plugins {
+    alias(libs.plugins.publish)
+}
+
+apply plugin: 'com.gradle.plugin-publish'
+
+apply from: rootProject.file('gradle/compile/groovy.gradle')
+apply from: rootProject.file('gradle/test/junit5.gradle')
+
+dependencies {
+    api gradleApi()
+    testImplementation gradleTestKit()
+}
+
+if (project.hasProperty('gradle.publish.key')) {
+    gradlePlugin {
+        website = 'https://xbib.org/joerg/gradle-plugins/src/branch/main/gradle-plugin-c'
+        vcsUrl = 'https://xbib.org/joerg/gradle-plugins'
+        plugins {
+            cPlugin {
+                id = 'org.xbib.gradle.plugin.c'
+                implementationClass = 'org.xbib.gradle.plugin.c.CPlugin'
+                version = project.version
+                description = 'Gradle plugin for build with C'
+                displayName = 'Gradle Plugin for build with C'
+                tags.set(['c'])
+            }
+        }
+    }
+}

gradle-plugin-c/gradle.properties

@@ -0,0 +1,2 @@
+name = gradle-plugin-c
+version = 3.1.0

gradle-plugin-c/src/main/java/org/xbib/gradle/plugin/c/CExtension.java

@@ -0,0 +1,59 @@
+package org.xbib.gradle.plugin.c;
+
+import java.io.File;
+import javax.inject.Inject;
+import org.gradle.api.artifacts.Configuration;
+import org.gradle.api.artifacts.ConfigurationContainer;
+import org.gradle.api.artifacts.dsl.DependencyHandler;
+import org.gradle.api.attributes.Attribute;
+import org.gradle.api.file.FileCollection;
+import org.gradle.api.model.ObjectFactory;
+import org.gradle.nativeplatform.platform.NativePlatform;
+import org.gradle.nativeplatform.platform.internal.DefaultArchitecture;
+import org.gradle.nativeplatform.platform.internal.DefaultNativePlatform;
+import org.gradle.nativeplatform.platform.internal.DefaultOperatingSystem;
+import org.gradle.nativeplatform.toolchain.NativeToolChain;
+import org.xbib.gradle.plugin.c.toolchain.CNativeToolChain;
+
+public abstract class CExtension {
+
+    static final Attribute<Boolean> EXTRACTED_TOOLS_ATTRIBUTE = Attribute.of("extracted-tools", Boolean.class);
+
+    static final NativePlatform GENERIC_NATIVE_PLATFORM = new DefaultNativePlatform(
+            "generic_platform",
+            new DefaultOperatingSystem("generic_os"),
+            new DefaultArchitecture("generic_arch")
+    );
+
+    public NativeToolChain localTool(String version, String location, String objectFileExtension) {
+        File tool = new File(location);
+        return getObjects().newInstance(CNativeToolChain.class, version, tool.getName(),
+                getObjects().fileCollection().from(tool), objectFileExtension);
+    }
+
+    public NativeToolChain repositoryTool(String group,
+                                          String name,
+                                          String version,
+                                          String locationInZip,
+                                          String objectFileExtension) {
+        Configuration toolConfiguration = getConfigurations().detachedConfiguration(
+                getDependencies().create(group + ":" + name + ":" + version + "@zip"));
+        FileCollection tool = toolConfiguration.getIncoming().artifactView(a ->
+                        a.getAttributes().attribute(EXTRACTED_TOOLS_ATTRIBUTE, true))
+                .getFiles().getAsFileTree().filter(file -> file.getPath().endsWith(locationInZip));
+        return getObjects().newInstance(CNativeToolChain.class, name, version, tool, objectFileExtension);
+    }
+
+    public NativePlatform platform() {
+        return GENERIC_NATIVE_PLATFORM;
+    }
+
+    @Inject
+    abstract protected ObjectFactory getObjects();
+
+    @Inject
+    abstract protected ConfigurationContainer getConfigurations();
+
+    @Inject
+    abstract protected DependencyHandler getDependencies();
+}

gradle-plugin-c/src/main/java/org/xbib/gradle/plugin/c/CPlugin.java

@@ -0,0 +1,24 @@
+package org.xbib.gradle.plugin.c;
+
+import org.gradle.api.Plugin;
+import org.gradle.api.Project;
+import org.xbib.gradle.plugin.c.toolchain.transform.ExtractZipTransform;
+import static org.gradle.api.artifacts.type.ArtifactTypeDefinition.ARTIFACT_TYPE_ATTRIBUTE;
+
+@SuppressWarnings("unused")
+abstract public class CPlugin implements Plugin<Project> {
+
+    @Override
+    public void apply(final Project project) {
+        // Register extension
+        project.getExtensions().create("c", CExtension.class);
+        // Make the ExtractZipTransform known
+        project.getDependencies().getAttributesSchema().attribute(CExtension.EXTRACTED_TOOLS_ATTRIBUTE);
+        project.getDependencies().getArtifactTypes().maybeCreate("zip")
+                .getAttributes().attribute(CExtension.EXTRACTED_TOOLS_ATTRIBUTE, false);
+        project.getDependencies().registerTransform(ExtractZipTransform.class, t -> {
+            t.getFrom().attribute(CExtension.EXTRACTED_TOOLS_ATTRIBUTE, false).attribute(ARTIFACT_TYPE_ATTRIBUTE, "zip");
+            t.getTo().attribute(CExtension.EXTRACTED_TOOLS_ATTRIBUTE, true).attribute(ARTIFACT_TYPE_ATTRIBUTE, "zip");
+        });
+    }
+}

gradle-plugin-c/src/main/java/org/xbib/gradle/plugin/c/tasks/ExtendedCCompile.java

@@ -0,0 +1,31 @@
+package org.xbib.gradle.plugin.c.tasks;
+
+import java.util.List;
+import org.gradle.api.provider.MapProperty;
+import org.gradle.api.tasks.CacheableTask;
+import org.gradle.api.tasks.Input;
+import org.gradle.language.c.tasks.CCompile;
+import org.gradle.nativeplatform.toolchain.internal.NativeCompileSpec;
+
+/**
+ * Extension of the 'org.gradle.language.c.tasks.CCompile' that supports defining different compiler arguments
+ * for different source files.
+ */
+@CacheableTask
+public abstract class ExtendedCCompile extends CCompile {
+
+    @Input
+    public abstract MapProperty<String, List<String>> getPerFileCompilerArgs();
+
+    @Override
+    protected NativeCompileSpec createCompileSpec() {
+        return new ExtendedCCompileSpec();
+    }
+
+    @Override
+    protected void configureSpec(NativeCompileSpec spec) {
+        super.configureSpec(spec);
+        ExtendedCCompileSpec extendedCCompileSpec = (ExtendedCCompileSpec) spec;
+        extendedCCompileSpec.getPerFileCompilerArgs().putAll(getPerFileCompilerArgs().get());
+    }
+}

gradle-plugin-c/src/main/java/org/xbib/gradle/plugin/c/tasks/ExtendedCCompileSpec.java

@@ -0,0 +1,15 @@
+package org.xbib.gradle.plugin.c.tasks;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import org.gradle.language.c.internal.DefaultCCompileSpec;
+
+public class ExtendedCCompileSpec extends DefaultCCompileSpec {
+
+    private final Map<String, List<String>> perFileCompilerArgs = new HashMap<>();
+
+    public Map<String, List<String>> getPerFileCompilerArgs() {
+        return perFileCompilerArgs;
+    }
+}

gradle-plugin-c/src/main/java/org/xbib/gradle/plugin/c/tasks/IncrementalAssemble.java

@@ -0,0 +1,80 @@
+package org.xbib.gradle.plugin.c.tasks;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+import org.gradle.api.file.ConfigurableFileCollection;
+import org.gradle.api.tasks.CacheableTask;
+import org.gradle.api.tasks.TaskAction;
+import org.gradle.api.tasks.WorkResult;
+import org.gradle.internal.operations.logging.BuildOperationLogger;
+import org.gradle.language.assembler.internal.DefaultAssembleSpec;
+import org.gradle.language.assembler.tasks.Assemble;
+import org.gradle.language.base.internal.compile.Compiler;
+import org.gradle.language.base.internal.tasks.StaleOutputCleaner;
+import org.gradle.nativeplatform.internal.BuildOperationLoggingCompilerDecorator;
+import org.gradle.nativeplatform.platform.internal.NativePlatformInternal;
+import org.gradle.nativeplatform.toolchain.internal.NativeToolChainInternal;
+import org.gradle.nativeplatform.toolchain.internal.compilespec.AssembleSpec;
+import org.gradle.work.ChangeType;
+import org.gradle.work.FileChange;
+import org.gradle.work.Incremental;
+import org.gradle.work.InputChanges;
+
+/**
+ * Incremental and cacheable version of the 'org.gradle.language.assembler.tasks.Assemble' task.
+ */
+@CacheableTask
+public abstract class IncrementalAssemble extends Assemble {
+
+    @Incremental
+    @Override
+    public ConfigurableFileCollection getSource() {
+        return super.getSource();
+    }
+
+    @TaskAction
+    public void assemble(InputChanges inputs) {
+        // Copied from super class and adjusted for incremental assembling
+
+        BuildOperationLogger operationLogger = getOperationLoggerFactory().newOperationLogger(getName(), getTemporaryDir());
+
+        List<File> toDelete = new ArrayList<>();
+        List<File> toAssemble = new ArrayList<>();
+
+        for (FileChange change : inputs.getFileChanges(super.getSource())) {
+            if (change.getChangeType() == ChangeType.REMOVED) {
+                toDelete.add(change.getFile());
+            }
+            if (change.getChangeType() != ChangeType.REMOVED) {
+                toAssemble.add(change.getFile());
+            }
+        }
+
+        boolean cleanedOutputs = StaleOutputCleaner.cleanOutputs(
+                getDeleter(),
+                toDelete,
+                getObjectFileDir()
+        );
+
+        DefaultAssembleSpec spec = new DefaultAssembleSpec();
+        spec.setTempDir(getTemporaryDir());
+
+        spec.setObjectFileDir(getObjectFileDir());
+        spec.source(toAssemble);
+        spec.include(getIncludes());
+        spec.args(getAssemblerArgs());
+        spec.setOperationLogger(operationLogger);
+
+        NativeToolChainInternal nativeToolChain = (NativeToolChainInternal) getToolChain().get();
+        NativePlatformInternal nativePlatform = (NativePlatformInternal) getTargetPlatform().get();
+        Compiler<AssembleSpec> compiler = nativeToolChain.select(nativePlatform).newCompiler(AssembleSpec.class);
+        WorkResult result = BuildOperationLoggingCompilerDecorator.wrap(compiler).execute(spec);
+        setDidWork(result.getDidWork() || cleanedOutputs);
+    }
+
+    @Override
+    public void assemble() {
+        // disable assemble() without 'inputs' argument
+    }
+}

gradle-plugin-c/src/main/java/org/xbib/gradle/plugin/c/toolchain/CNativeToolChain.java

@@ -0,0 +1,66 @@
+package org.xbib.gradle.plugin.c.toolchain;
+
+import javax.inject.Inject;
+import org.gradle.api.NonNullApi;
+import org.gradle.api.file.FileCollection;
+import org.gradle.api.model.ObjectFactory;
+import org.gradle.nativeplatform.platform.internal.NativePlatformInternal;
+import org.gradle.nativeplatform.toolchain.NativeToolChain;
+import org.gradle.nativeplatform.toolchain.internal.NativeLanguage;
+import org.gradle.nativeplatform.toolchain.internal.NativeToolChainInternal;
+import org.gradle.nativeplatform.toolchain.internal.PlatformToolProvider;
+
+@NonNullApi
+public abstract class CNativeToolChain implements NativeToolChain, NativeToolChainInternal {
+
+    private final String toolName;
+
+    private final String toolVersion;
+
+    private final FileCollection tool;
+
+    private final String objectFileExtension;
+
+    @Inject
+    public CNativeToolChain(String toolName,
+                            String toolVersion,
+                            FileCollection tool,
+                            String objectFileExtension) {
+        this.toolName = toolName;
+        this.toolVersion = toolVersion;
+        this.tool = tool;
+        this.objectFileExtension = objectFileExtension;
+    }
+
+    @Override
+    public String getName() {
+        return toolName + "_" + toolVersion;
+    }
+
+    @Override
+    public PlatformToolProvider select(NativePlatformInternal nativePlatform) {
+        return getObjects().newInstance(CPlatformToolProvider.class, tool, toolVersion, objectFileExtension);
+    }
+
+    @Override
+    public PlatformToolProvider select(NativeLanguage nativeLanguage, NativePlatformInternal nativePlatform) {
+        return select(nativePlatform);
+    }
+
+    @Override
+    public String getDisplayName() {
+        return getName();
+    }
+
+    @Override
+    public String getOutputType() {
+        return getName();
+    }
+
+    @Override
+    public void assertSupported() {
+    }
+
+    @Inject
+    abstract protected ObjectFactory getObjects();
+}

gradle-plugin-c/src/main/java/org/xbib/gradle/plugin/c/toolchain/CPlatformToolProvider.java

@@ -0,0 +1,202 @@
+package org.xbib.gradle.plugin.c.toolchain;
+
+import javax.inject.Inject;
+import org.gradle.api.file.FileCollection;
+import org.gradle.internal.logging.text.DiagnosticsVisitor;
+import org.gradle.internal.operations.BuildOperationExecutor;
+import org.gradle.internal.work.WorkerLeaseService;
+import org.gradle.language.base.internal.compile.CompileSpec;
+import org.gradle.language.base.internal.compile.Compiler;
+import org.gradle.language.base.internal.compile.DefaultCompilerVersion;
+import org.gradle.language.base.internal.compile.VersionAwareCompiler;
+import org.gradle.nativeplatform.internal.CompilerOutputFileNamingSchemeFactory;
+import org.gradle.nativeplatform.internal.LinkerSpec;
+import org.gradle.nativeplatform.internal.StaticLibraryArchiverSpec;
+import org.gradle.nativeplatform.toolchain.internal.CommandLineToolContext;
+import org.gradle.nativeplatform.toolchain.internal.CommandLineToolInvocationWorker;
+import org.gradle.nativeplatform.toolchain.internal.DefaultCommandLineToolInvocationWorker;
+import org.gradle.nativeplatform.toolchain.internal.DefaultMutableCommandLineToolContext;
+import org.gradle.nativeplatform.toolchain.internal.EmptySystemLibraries;
+import org.gradle.nativeplatform.toolchain.internal.OutputCleaningCompiler;
+import org.gradle.nativeplatform.toolchain.internal.PlatformToolProvider;
+import org.gradle.nativeplatform.toolchain.internal.SystemLibraries;
+import org.gradle.nativeplatform.toolchain.internal.ToolType;
+import org.gradle.nativeplatform.toolchain.internal.compilespec.AssembleSpec;
+import org.gradle.nativeplatform.toolchain.internal.compilespec.CCompileSpec;
+import org.gradle.nativeplatform.toolchain.internal.metadata.CompilerMetadata;
+import org.gradle.nativeplatform.toolchain.internal.tools.CommandLineToolSearchResult;
+import org.gradle.process.internal.ExecActionFactory;
+import org.gradle.util.internal.VersionNumber;
+import org.xbib.gradle.plugin.c.toolchain.tools.Assembler;
+import org.xbib.gradle.plugin.c.toolchain.tools.CCompiler;
+import org.xbib.gradle.plugin.c.toolchain.tools.Linker;
+import org.xbib.gradle.plugin.c.toolchain.tools.StaticLibraryArchiver;
+
+public abstract class CPlatformToolProvider implements PlatformToolProvider {
+
+    private final FileCollection tool;
+
+    private final String toolVersion;
+
+    private final String objectFileExtension;
+
+    @Inject
+    public CPlatformToolProvider(FileCollection tool, String toolVersion, String objectFileExtension) {
+        this.tool = tool;
+        this.toolVersion = toolVersion;
+        this.objectFileExtension = objectFileExtension;
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    public <T extends CompileSpec> Compiler<T> newCompiler(Class<T> spec) {
+        if (CCompileSpec.class.isAssignableFrom(spec)) {
+            return (Compiler<T>) createCCompiler();
+        }
+        if (AssembleSpec.class.isAssignableFrom(spec)) {
+            return (Compiler<T>) createAssembler();
+        }
+        if (LinkerSpec.class.isAssignableFrom(spec)) {
+            return (Compiler<T>) createLinker();
+        }
+        if (StaticLibraryArchiverSpec.class.isAssignableFrom(spec)) {
+            return (Compiler<T>) createStaticLibraryArchiver();
+        }
+        throw new IllegalArgumentException(String.format("Don't know how to compile from a spec of type %s.",
+                spec.getSimpleName()));
+    }
+
+    protected Compiler<CCompileSpec> createCCompiler() {
+        CCompiler cCompiler = new CCompiler(getBuildOperationExecutor(), getCompilerOutputFileNamingSchemeFactory(),
+                commandLineTool("Compiler"), context(), objectFileExtension, getWorkerLeaseService());
+        OutputCleaningCompiler<CCompileSpec> outputCleaningCompiler = new OutputCleaningCompiler<>(cCompiler,
+                getCompilerOutputFileNamingSchemeFactory(), objectFileExtension);
+        return versionAwareCompiler(outputCleaningCompiler, "C Compiler");
+    }
+
+    protected Compiler<AssembleSpec> createAssembler() {
+        return new Assembler(getBuildOperationExecutor(), getCompilerOutputFileNamingSchemeFactory(),
+                commandLineTool("Assembler"), context(), objectFileExtension, getWorkerLeaseService());
+    }
+
+    protected Compiler<LinkerSpec> createLinker() {
+        Linker linker = new Linker(getBuildOperationExecutor(), commandLineTool("Linked"), context(),
+                getWorkerLeaseService());
+        return versionAwareCompiler(linker, "Linker");
+    }
+
+    protected Compiler<StaticLibraryArchiverSpec> createStaticLibraryArchiver() {
+        return new StaticLibraryArchiver(getBuildOperationExecutor(),
+                commandLineTool("Static Library"), context(), getWorkerLeaseService());
+    }
+
+    private <T extends CompileSpec> VersionAwareCompiler<T> versionAwareCompiler(Compiler<T> compiler, String toolType) {
+        return new VersionAwareCompiler<>(compiler, new DefaultCompilerVersion(toolType,
+                tool.getSingleFile().getName(), VersionNumber.parse(toolVersion)));
+    }
+
+    private CommandLineToolInvocationWorker commandLineTool(String name) {
+        return new DefaultCommandLineToolInvocationWorker(name, tool.getSingleFile(), getExecActionFactory());
+    }
+
+    private CommandLineToolContext context() {
+        return new DefaultMutableCommandLineToolContext();
+    }
+
+    @Override
+    public String getExecutableName(String executablePath) {
+        return executablePath;
+    }
+
+    @Override
+    public String getSharedLibraryName(String libraryPath) {
+        return libraryPath;
+    }
+
+    @Override
+    public String getImportLibraryName(String libraryPath) {
+        return libraryPath;
+    }
+
+    @Override
+    public String getSharedLibraryLinkFileName(String libraryPath) {
+        return libraryPath;
+    }
+
+    @Override
+    public String getStaticLibraryName(String libraryPath) {
+        return libraryPath;
+    }
+
+    @Override
+    public String getExecutableSymbolFileName(String executablePath) {
+        return executablePath;
+    }
+
+    @Override
+    public String getLibrarySymbolFileName(String libraryPath) {
+        return libraryPath;
+    }
+
+    @Override
+    public SystemLibraries getSystemLibraries(ToolType compilerType) {
+        return new EmptySystemLibraries();
+    }
+
+
+    @Override
+    public boolean isAvailable() {
+        return true;
+    }
+
+    @Override
+    public boolean isSupported() {
+        return true;
+    }
+
+    @Override
+    public boolean producesImportLibrary() {
+        return false;
+    }
+
+    @Override
+    public boolean requiresDebugBinaryStripping() {
+        return true;
+    }
+
+    @Override
+    public void explain(DiagnosticsVisitor visitor) {
+    }
+
+    @Override
+    public String getObjectFileExtension() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public <T> T get(Class<T> toolType) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public CompilerMetadata getCompilerMetadata(ToolType compilerType) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public CommandLineToolSearchResult locateTool(ToolType compilerType) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Inject
+    protected abstract BuildOperationExecutor getBuildOperationExecutor();
+
+    @Inject
+    protected abstract CompilerOutputFileNamingSchemeFactory getCompilerOutputFileNamingSchemeFactory();
+
+    @Inject
+    protected abstract ExecActionFactory getExecActionFactory();
+
+    @Inject
+    protected abstract WorkerLeaseService getWorkerLeaseService();
+}

gradle-plugin-c/src/main/java/org/xbib/gradle/plugin/c/toolchain/tools/Assembler.java

@@ -0,0 +1,84 @@
+package org.xbib.gradle.plugin.c.toolchain.tools;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import org.gradle.internal.Transformers;
+import org.gradle.internal.operations.BuildOperationExecutor;
+import org.gradle.internal.process.ArgWriter;
+import org.gradle.internal.work.WorkerLeaseService;
+import org.gradle.nativeplatform.internal.CompilerOutputFileNamingSchemeFactory;
+import org.gradle.nativeplatform.toolchain.internal.CommandLineToolContext;
+import org.gradle.nativeplatform.toolchain.internal.CommandLineToolInvocation;
+import org.gradle.nativeplatform.toolchain.internal.CommandLineToolInvocationWorker;
+import org.gradle.nativeplatform.toolchain.internal.NativeCompiler;
+import org.gradle.nativeplatform.toolchain.internal.compilespec.AssembleSpec;
+
+public class Assembler extends NativeCompiler<AssembleSpec> {
+
+    private final String objectFileExtension;
+
+    public Assembler(BuildOperationExecutor buildOperationExecutor,
+                     CompilerOutputFileNamingSchemeFactory compilerOutputFileNamingSchemeFactory,
+                     CommandLineToolInvocationWorker commandLineTool,
+                     CommandLineToolContext invocationContext,
+                     String objectFileExtension,
+                     WorkerLeaseService workerLeaseService) {
+        super(buildOperationExecutor, compilerOutputFileNamingSchemeFactory, commandLineTool, invocationContext,
+                new AssemblerArgsTransformer(), Transformers.noOpTransformer(),
+                objectFileExtension, true,
+                workerLeaseService);
+
+        this.objectFileExtension = objectFileExtension;
+    }
+
+    @Override
+    protected CommandLineToolInvocation createPerFileInvocation(List<String> genericArgs,
+                                                                File sourceFile,
+                                                                File objectDir,
+                                                                AssembleSpec spec) {
+        List<String> sourceArgs = this.getSourceArgs(sourceFile);
+        List<String> outputArgs = this.getOutputArgs(spec, this.getOutputFileDir(sourceFile, objectDir,
+                objectFileExtension));
+        List<String> pchArgs = this.maybeGetPCHArgs(spec, sourceFile);
+
+        // Changed order: put 'outputArgs' first
+        return this.newInvocation("compiling ".concat(sourceFile.getName()), objectDir,
+                this.buildPerFileArgs(outputArgs, genericArgs, sourceArgs, pchArgs), spec.getOperationLogger());
+    }
+
+    @Override
+    protected Iterable<String> buildPerFileArgs(List<String> genericArgs,
+                                                List<String> sourceArgs,
+                                                List<String> outputArgs,
+                                                List<String> pchArgs) {
+        if (pchArgs != null && !pchArgs.isEmpty()) {
+            throw new UnsupportedOperationException("Precompiled header arguments cannot be specified for an Assembler compiler.");
+        }
+        return super.buildPerFileArgs(genericArgs, sourceArgs, outputArgs, pchArgs);
+    }
+
+    @Override
+    protected List<String> getOutputArgs(AssembleSpec spec, File outputFile) {
+        return Arrays.asList("-o", outputFile.getAbsolutePath());
+    }
+
+    @Override
+    protected void addOptionsFileArgs(List<String> args, File tempDir) {
+        ArrayList<String> originalArgs = new ArrayList<>(args);
+        args.clear();
+        args.addAll(ArgWriter.argsFileGenerator(new File(tempDir, "options.txt"),
+                ArgWriter.unixStyleFactory()).transform(originalArgs));
+    }
+
+    @Override
+    protected List<String> getPCHArgs(AssembleSpec spec) {
+        List<String> pchArgs = new ArrayList<>();
+        if (spec.getPrefixHeaderFile() != null) {
+            pchArgs.add("-include");
+            pchArgs.add(spec.getPrefixHeaderFile().getAbsolutePath());
+        }
+        return pchArgs;
+    }
+}

gradle-plugin-c/src/main/java/org/xbib/gradle/plugin/c/toolchain/tools/AssemblerArgsTransformer.java

@@ -0,0 +1,15 @@
+package org.xbib.gradle.plugin.c.toolchain.tools;
+
+import java.util.List;
+import org.gradle.api.NonNullApi;
+import org.gradle.nativeplatform.toolchain.internal.ArgsTransformer;
+import org.gradle.nativeplatform.toolchain.internal.compilespec.AssembleSpec;
+
+@NonNullApi
+public class AssemblerArgsTransformer implements ArgsTransformer<AssembleSpec> {
+
+    @Override
+    public List<String> transform(AssembleSpec assembleSpec) {
+        return assembleSpec.getAllArgs();
+    }
+}

gradle-plugin-c/src/main/java/org/xbib/gradle/plugin/c/toolchain/tools/CCompiler.java

@@ -0,0 +1,70 @@
+package org.xbib.gradle.plugin.c.toolchain.tools;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import org.gradle.internal.Transformers;
+import org.gradle.internal.operations.BuildOperationExecutor;
+import org.gradle.internal.process.ArgWriter;
+import org.gradle.internal.work.WorkerLeaseService;
+import org.gradle.nativeplatform.internal.CompilerOutputFileNamingSchemeFactory;
+import org.gradle.nativeplatform.toolchain.internal.CommandLineToolContext;
+import org.gradle.nativeplatform.toolchain.internal.CommandLineToolInvocation;
+import org.gradle.nativeplatform.toolchain.internal.CommandLineToolInvocationWorker;
+import org.gradle.nativeplatform.toolchain.internal.NativeCompiler;
+import org.gradle.nativeplatform.toolchain.internal.compilespec.CCompileSpec;
+import org.xbib.gradle.plugin.c.tasks.ExtendedCCompileSpec;
+
+public class CCompiler extends NativeCompiler<CCompileSpec> {
+
+    public CCompiler(BuildOperationExecutor buildOperationExecutor,
+                     CompilerOutputFileNamingSchemeFactory compilerOutputFileNamingSchemeFactory,
+                     CommandLineToolInvocationWorker commandLineToolInvocationWorker,
+                     CommandLineToolContext invocationContext,
+                     String objectFileExtension,
+                     WorkerLeaseService workerLeaseService) {
+        super(buildOperationExecutor, compilerOutputFileNamingSchemeFactory, commandLineToolInvocationWorker, invocationContext,
+                new CCompilerArgsTransformer(), Transformers.noOpTransformer(),
+                objectFileExtension, true, workerLeaseService);
+    }
+
+    @Override
+    protected List<String> getOutputArgs(CCompileSpec spec, File outputFile) {
+        return Arrays.asList("-o", outputFile.getAbsolutePath());
+    }
+
+    @Override
+    protected void addOptionsFileArgs(List<String> args, File tempDir) {
+        ArrayList<String> originalArgs = new ArrayList<>(args);
+        args.clear();
+        args.addAll(ArgWriter.argsFileGenerator(new File(tempDir, "options.txt"),
+                ArgWriter.unixStyleFactory()).transform(originalArgs));
+    }
+
+    @Override
+    protected List<String> getPCHArgs(CCompileSpec spec) {
+        List<String> pchArgs = new ArrayList<>();
+        if (spec.getPrefixHeaderFile() != null) {
+            pchArgs.add("-include");
+            pchArgs.add(spec.getPrefixHeaderFile().getAbsolutePath());
+        }
+        return pchArgs;
+    }
+
+    @Override
+    protected CommandLineToolInvocation createPerFileInvocation(List<String> genericArgs,
+                                                                File sourceFile,
+                                                                File objectDir,
+                                                                CCompileSpec spec) {
+        ExtendedCCompileSpec extendedCCompileSpec = (ExtendedCCompileSpec) spec;
+        List<String> perFileArgs = extendedCCompileSpec.getPerFileCompilerArgs().get(sourceFile.getName());
+        if (perFileArgs != null) {
+            List<String> allPerFileArgs = new ArrayList<>(genericArgs);
+            allPerFileArgs.addAll(perFileArgs);
+            return super.createPerFileInvocation(allPerFileArgs, sourceFile, objectDir, spec);
+        } else {
+            return super.createPerFileInvocation(genericArgs, sourceFile, objectDir, spec);
+        }
+    }
+}

gradle-plugin-c/src/main/java/org/xbib/gradle/plugin/c/toolchain/tools/CCompilerArgsTransformer.java

@@ -0,0 +1,35 @@
+package org.xbib.gradle.plugin.c.toolchain.tools;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+import org.gradle.api.NonNullApi;
+import org.gradle.nativeplatform.toolchain.internal.ArgsTransformer;
+import org.gradle.nativeplatform.toolchain.internal.MacroArgsConverter;
+import org.gradle.nativeplatform.toolchain.internal.compilespec.CCompileSpec;
+
+@NonNullApi
+public class CCompilerArgsTransformer implements ArgsTransformer<CCompileSpec> {
+
+    @Override
+    public List<String> transform(CCompileSpec spec) {
+        List<String> args = new ArrayList<>();
+
+        for (File file : spec.getIncludeRoots()) {
+            args.add("-I");
+            args.add(file.getAbsolutePath());
+        }
+
+        for (File file : spec.getSystemIncludeRoots()) {
+            args.add("-isystem");
+            args.add(file.getAbsolutePath());
+        }
+
+        for (String macroArg : new MacroArgsConverter().transform(spec.getMacros())) {
+            args.add("-D" + macroArg);
+        }
+        args.addAll(spec.getAllArgs());
+
+        return args;
+    }
+}

gradle-plugin-c/src/main/java/org/xbib/gradle/plugin/c/toolchain/tools/Linker.java

@@ -0,0 +1,46 @@
+package org.xbib.gradle.plugin.c.toolchain.tools;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+import org.gradle.api.Action;
+import org.gradle.internal.operations.BuildOperationExecutor;
+import org.gradle.internal.operations.BuildOperationQueue;
+import org.gradle.internal.process.ArgWriter;
+import org.gradle.internal.work.WorkerLeaseService;
+import org.gradle.nativeplatform.internal.LinkerSpec;
+import org.gradle.nativeplatform.toolchain.internal.AbstractCompiler;
+import org.gradle.nativeplatform.toolchain.internal.CommandLineToolContext;
+import org.gradle.nativeplatform.toolchain.internal.CommandLineToolInvocation;
+import org.gradle.nativeplatform.toolchain.internal.CommandLineToolInvocationWorker;
+
+public class Linker extends AbstractCompiler<LinkerSpec> {
+
+    public Linker(BuildOperationExecutor buildOperationExecutor,
+                  CommandLineToolInvocationWorker commandLineToolInvocationWorker,
+                  CommandLineToolContext invocationContext,
+                  WorkerLeaseService workerLeaseService) {
+        super(buildOperationExecutor, commandLineToolInvocationWorker, invocationContext,
+                new LinkerArgsTransformer(),
+                true, workerLeaseService);
+    }
+
+    @Override
+    protected Action<BuildOperationQueue<CommandLineToolInvocation>> newInvocationAction(final LinkerSpec spec,
+                                                                                         List<String> args) {
+        final CommandLineToolInvocation invocation = newInvocation("linking " + spec.getOutputFile().getName(),
+                args, spec.getOperationLogger());
+        return buildQueue -> {
+            buildQueue.setLogLocation(spec.getOperationLogger().getLogLocation());
+            buildQueue.add(invocation);
+        };
+    }
+
+    @Override
+    protected void addOptionsFileArgs(List<String> args, File tempDir) {
+        ArrayList<String> originalArgs = new ArrayList<>(args);
+        args.clear();
+        args.addAll(ArgWriter.argsFileGenerator(new File(tempDir, "options.txt"),
+                ArgWriter.unixStyleFactory()).transform(originalArgs));
+    }
+}

gradle-plugin-c/src/main/java/org/xbib/gradle/plugin/c/toolchain/tools/LinkerArgsTransformer.java

@@ -0,0 +1,36 @@
+package org.xbib.gradle.plugin.c.toolchain.tools;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+import org.gradle.api.NonNullApi;
+import org.gradle.nativeplatform.internal.LinkerSpec;
+import org.gradle.nativeplatform.toolchain.internal.ArgsTransformer;
+
+@NonNullApi
+public class LinkerArgsTransformer implements ArgsTransformer<LinkerSpec> {
+
+    @Override
+    public List<String> transform(LinkerSpec spec) {
+
+        List<String> args = new ArrayList<>(spec.getSystemArgs());
+
+        args.addAll(spec.getArgs());
+
+        for (File file : spec.getObjectFiles()) {
+            args.add(file.getAbsolutePath());
+        }
+        for (File file : spec.getLibraries()) {
+            args.add(file.getAbsolutePath());
+        }
+
+        args.add("-o");
+        args.add(spec.getOutputFile().getAbsolutePath());
+
+        if (!spec.getLibraryPath().isEmpty()) {
+            throw new UnsupportedOperationException("Library Path not yet supported");
+        }
+
+        return args;
+    }
+}

gradle-plugin-c/src/main/java/org/xbib/gradle/plugin/c/toolchain/tools/StaticLibraryArchiver.java

@@ -0,0 +1,59 @@
+package org.xbib.gradle.plugin.c.toolchain.tools;
+
+import java.io.File;
+import java.util.List;
+import org.gradle.api.Action;
+import org.gradle.api.GradleException;
+import org.gradle.api.tasks.WorkResult;
+import org.gradle.internal.operations.BuildOperationExecutor;
+import org.gradle.internal.operations.BuildOperationQueue;
+import org.gradle.internal.work.WorkerLeaseService;
+import org.gradle.nativeplatform.internal.StaticLibraryArchiverSpec;
+import org.gradle.nativeplatform.toolchain.internal.AbstractCompiler;
+import org.gradle.nativeplatform.toolchain.internal.CommandLineToolContext;
+import org.gradle.nativeplatform.toolchain.internal.CommandLineToolInvocation;
+import org.gradle.nativeplatform.toolchain.internal.CommandLineToolInvocationWorker;
+
+public class StaticLibraryArchiver extends AbstractCompiler<StaticLibraryArchiverSpec> {
+
+    public StaticLibraryArchiver(BuildOperationExecutor buildOperationExecutor,
+                                 CommandLineToolInvocationWorker commandLineToolInvocationWorker,
+                                 CommandLineToolContext invocationContext,
+                                 WorkerLeaseService workerLeaseService) {
+        super(buildOperationExecutor, commandLineToolInvocationWorker, invocationContext,
+                new StaticLibraryArchiverArgsTransformer(), false, workerLeaseService);
+    }
+
+    @Override
+    public WorkResult execute(final StaticLibraryArchiverSpec spec) {
+        deletePreviousOutput(spec);
+        return super.execute(spec);
+    }
+
+    private void deletePreviousOutput(StaticLibraryArchiverSpec spec) {
+        // Need to delete the previous archive, otherwise stale object files will remain
+        if (!spec.getOutputFile().isFile()) {
+            return;
+        }
+        if (!(spec.getOutputFile().delete())) {
+            throw new GradleException("Create static archive failed: could not delete previous archive");
+        }
+    }
+
+    @Override
+    protected Action<BuildOperationQueue<CommandLineToolInvocation>> newInvocationAction(final StaticLibraryArchiverSpec spec,
+                                                                                         List<String> args) {
+        final CommandLineToolInvocation invocation = newInvocation(
+                "archiving " + spec.getOutputFile().getName(), spec.getOutputFile().getParentFile(), args, spec.getOperationLogger());
+
+        return buildQueue -> {
+            buildQueue.setLogLocation(spec.getOperationLogger().getLogLocation());
+            buildQueue.add(invocation);
+        };
+    }
+
+    @Override
+    protected void addOptionsFileArgs(List<String> args, File tempDir) {
+        // No support for command file
+    }
+}

gradle-plugin-c/src/main/java/org/xbib/gradle/plugin/c/toolchain/tools/StaticLibraryArchiverArgsTransformer.java

@@ -0,0 +1,26 @@
+package org.xbib.gradle.plugin.c.toolchain.tools;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+import org.gradle.api.NonNullApi;
+import org.gradle.nativeplatform.internal.StaticLibraryArchiverSpec;
+import org.gradle.nativeplatform.toolchain.internal.ArgsTransformer;
+
+@NonNullApi
+public class StaticLibraryArchiverArgsTransformer implements ArgsTransformer<StaticLibraryArchiverSpec> {
+
+    public List<String> transform(StaticLibraryArchiverSpec spec) {
+        List<String> args = new ArrayList<>(spec.getAllArgs());
+
+        args.add("-rv");
+
+        args.add(spec.getOutputFile().getAbsolutePath());
+
+        for (File file : spec.getObjectFiles()) {
+            args.add(file.getAbsolutePath());
+        }
+
+        return args;
+    }
+}

gradle-plugin-c/src/main/java/org/xbib/gradle/plugin/c/toolchain/transform/ExtractZipTransform.java

@@ -0,0 +1,63 @@
+package org.xbib.gradle.plugin.c.toolchain.transform;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.attribute.PosixFilePermissions;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipInputStream;
+import org.gradle.api.artifacts.transform.InputArtifact;
+import org.gradle.api.artifacts.transform.TransformAction;
+import org.gradle.api.artifacts.transform.TransformOutputs;
+import org.gradle.api.artifacts.transform.TransformParameters;
+import org.gradle.api.file.FileSystemLocation;
+import org.gradle.api.provider.Provider;
+import org.gradle.api.tasks.PathSensitive;
+import org.gradle.api.tasks.PathSensitivity;
+import org.gradle.internal.os.OperatingSystem;
+
+public abstract class ExtractZipTransform implements TransformAction<TransformParameters.None> {
+
+    @InputArtifact
+    @PathSensitive(PathSensitivity.RELATIVE)
+    public abstract Provider<FileSystemLocation> getInputArtifact();
+
+    @Override
+    public void transform(TransformOutputs outputs) {
+        File input = getInputArtifact().get().getAsFile();
+        File unzipDir = outputs.dir(input.getName().substring(0, input.getName().lastIndexOf(".zip")));
+        try {
+            unzipTo(input, unzipDir);
+            System.out.println("Transformed into: " + unzipDir.getAbsolutePath());
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private void unzipTo(File input, File unzipDir) throws IOException {
+        byte[] buffer = new byte[1024];
+        ZipInputStream zis = new ZipInputStream(Files.newInputStream(input.toPath()));
+        ZipEntry zipEntry = zis.getNextEntry();
+
+        while (zipEntry != null) {
+            if (!zipEntry.isDirectory()) {
+                File newFile = new File(unzipDir, zipEntry.getName());
+                newFile.getParentFile().mkdirs();
+                FileOutputStream fos = new FileOutputStream(newFile);
+                int len;
+                while ((len = zis.read(buffer)) > 0) {
+                    fos.write(buffer, 0, len);
+                }
+                fos.close();
+                if (OperatingSystem.current().isUnix()) {
+                    Files.setPosixFilePermissions(newFile.toPath(), PosixFilePermissions.fromString("rwxr-xr-x"));
+                }
+            }
+            zipEntry = zis.getNextEntry();
+        }
+
+        zis.closeEntry();
+        zis.close();
+    }
+}

gradle-plugin-c/src/test/groovy/org/xbib/gradle/plugin/c/test/CPluginIntegrationTest.groovy

@@ -0,0 +1,61 @@
+package org.xbib.gradle.plugin.c.test
+
+import org.gradle.testkit.runner.BuildResult
+import org.gradle.testkit.runner.GradleRunner
+import org.gradle.testkit.runner.TaskOutcome
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.io.TempDir
+
+import static org.junit.jupiter.api.Assertions.assertEquals
+
+class CPluginIntegrationTest {
+
+    private File projectDir
+
+    private File settingsFile
+
+    private File buildFile
+
+    @BeforeEach
+    void setup(@TempDir File testProjectDir) throws IOException {
+        this.projectDir = testProjectDir
+        this.settingsFile = new File(testProjectDir, "settings.gradle")
+        this.buildFile = new File(testProjectDir, "build.gradle")
+    }
+
+    @Test
+    void testPlugin() {
+        String settingsFileContent = '''
+rootProject.name = 'c-test'
+'''
+        settingsFile.write(settingsFileContent)
+        String buildFileContent = '''
+
+plugins {
+    id 'base'
+    id 'org.xbib.gradle.plugin.c'
+}
+
+// dummy task, no source present
+
+tasks.register('compileC', org.xbib.gradle.plugin.c.tasks.ExtendedCCompile) {
+    toolChain.set(c.localTool("14.0.0", "/usr/bin/clang", ".o"))
+    targetPlatform.set(c.platform())
+    source(layout.projectDirectory.files("src/c").asFileTree)
+    includes(layout.projectDirectory.files("src/headers"))
+    compilerArgs.add("-S")
+    objectFileDir.set(layout.buildDirectory.dir("out/o"))
+}
+
+'''
+        buildFile.write(buildFileContent)
+        BuildResult result = GradleRunner.create()
+                .withProjectDir(projectDir)
+                .withPluginClasspath()
+                .withArguments(":compileC", "--info", "--stacktrace", "--warning-mode=all")
+                .forwardOutput()
+                .build()
+        assertEquals(TaskOutcome.NO_SOURCE, result.task(":compileC").getOutcome())
+    }
+}

gradle-plugin-cmake/NOTICE.txt

@@ -0,0 +1,8 @@
+
+This work is based on
+
+https://github.com/crimsonmagick/gradle-cmake-plugin
+
+as of Januar 8, 2024
+
+License: Apache 2.0

gradle-plugin-cmake/README.md

@@ -0,0 +1,185 @@
+# gradle-plugin-cmake
+
+This plugin allows to configure and build using CMake.
+
+## Prerequisites
+
+* `CMake` installed on the system. Available [here](https://www.cmake.org "CMake Homepage").
+
+## To apply the plugin:
+
+**plugins DSL**
+
+```groovy
+plugins {
+  id 'org.xbib.gradle.plugin.cmake' version '3.1.0'
+}
+```
+
+**Legacy plugin application**
+
+```groovy
+buildscript {
+  repositories {
+    maven {
+      url "https://plugins.gradle.org/m2/"
+    }
+  }
+  dependencies {
+    classpath 'org.xbib.gradle:gradle-plugin-cmake:3.1.0'
+  }
+}
+
+apply plugin: "org.xbib.gradle.plugin.cmake"
+```
+
+and configure by:
+
+```groovy
+cmake {
+  // optional configration to path of cmake. Not required if cmake is on the path.
+  executable='/my/path/to/cmake'
+  // optional working folder. default is ./build/cmake
+  workingFolder=file("$buildDir/cmake")
+  // cmakeConfigure parameters
+  // optional source folder. This is where the main CMakeLists.txt file resides. Default is ./src/main/cpp
+  sourceFolder=file("$projectDir/src/main/cpp")
+  // optional install prefix. By default, install prefix is empty.
+  installPrefix="${System.properties['user.home']}"
+  // select a generator (optional, otherwise cmake's default generator is used)
+  generator='Visual Studio 15 2017'
+  // set a platform for generators that support it (usually Visual Studio)
+  platform='x64'
+  // set a toolset generators that support it (usually only Visual Studio)
+  toolset='v141'
+  // optionally set to build static libs
+  buildStaticLibs=true
+  // optionally set to build shared libs
+  buildSharedLibs=true
+  // define arbitrary CMake parameters. The below adds -Dtest=hello to cmake command line.
+  defs.test='hello'
+  // cmakeBuild parameters
+  // optional configuration to build
+  buildConfig='Release'
+  // optional build target
+  buildTarget='install'
+  // optional build clean. if set to true, calls cmake --build with --clean-first
+  buildClean=false
+}
+```
+
+## Auto-created tasks
+
+* *cmakeConfigure*: Calls CMake to generate your build scripts in the folder selected by workingFolder.
+
+* *cmakeBuild*: Calls CMake --build in the folder selected by workingFolder to actually build.
+
+* *cmakeClean*: Cleans the workingFolder.
+
+* *cmakeGenerators*: Trys to list the generators available on the current platform by parsing `cmake --help`'s output.
+
+## Examples
+
+clean, configure and build:
+
+```bash
+./gradlew cmakeClean cmakeConfigure cmakeBuild
+```
+
+if you have assemble and clean tasks in your gradle project already you can also use:
+
+```bash
+assemble.dependsOn cmakeBuild
+cmakeBuild.dependsOn cmakeConfigure
+clean.dependsOn cmakeClean
+```
+
+and just call
+
+```bash
+./gradlew clean assemble
+```
+
+If you want to get the output of cmake, add -i to your gradle call, for example:
+
+```bash
+./gradlew cmakeConfigure -i
+```
+
+## Custom tasks
+
+You can create custom tasks the following way:
+
+```groovy
+task configureFoo(type: org.xbib.gradle.plugin.cmake.CMakeConfigureTask) {
+  sourceFolder=file("$projectDir/src/main/cpp/foo")
+  workingFolder=file("$buildDir/cmake/foo")
+  // ... other parameters you need, see above, except the ones listed under cmakeBuild Parameters
+}
+
+task buildFoo(type: org.xbib.gradle.plugin.cmake.CMakeBuildTask) {
+  workingFolder=file("$buildDir/cmake/foo")
+  // ... other parameters you need, see above, except the ones listed under cmakeConfigure parameters
+}
+
+buildFoo.dependsOn configureFoo // optional --- make sure its configured when you run the build task
+```
+### Multiple targets (cross-compilation)
+If you need to configure for multiple targets you can use the `targets` property:
+
+```groovy
+cmake {
+  sourceFolder = "$projectDir/src"
+  buildSharedLibs = true
+  buildClean = true
+  buildConfig = 'Release'
+  targets {
+    windows {
+      final os = OperatingSystem.WINDOWS
+      workingFolder = new File(project.getBuildDir(), "cmake" + File.separator + os.nativePrefix)
+      platform='x64'
+    }
+    linux {
+      final os = OperatingSystem.LINUX
+      workingFolder = new File(project.getBuildDir(), "cmake" + File.separator + os.nativePrefix)
+      platform = 'x64'
+    }
+    mac {
+      final os = OperatingSystem.MAC_OS
+      workingFolder = new File(project.getBuildDir(), "cmake" + File.separator + os.nativePrefix)
+      platform = 'arm64'
+    }
+  }
+}
+
+```
+
+### Custom tasks using main configuration
+
+As an alternative to using `targets` you can "import" the settings you've made in the main configuration "cmake" using the 'configureFromProject()' call:
+
+```groovy
+cmake {
+  executable='/my/path/to/cmake'
+  workingFolder=file("$buildDir/cmake")
+  sourceFolder=file("$projectDir/src/main/cpp")
+  installPrefix="${System.properties['user.home']}"
+  generator='Visual Studio 15 2017'
+  platform='x64'
+}
+
+task cmakeConfigureX86(type: org.xbib.gradle.plugin.cmake.CMakeConfigureTask) {
+  configureFromProject() // uses everything in the cmake { ... } section.
+  // overwrite target platform
+  platform='x86'
+  // set a different working folder to not collide with default task
+  workingFolder=file("$buildDir/cmake_x86")
+}
+
+task cmakeBuildX86(type: org.xbib.gradle.plugin.cmake.CMakeBuildTask) {
+  configureFromProject() // uses everything in the cmake { ... } section.
+  workingFolder=file("$buildDir/cmake_x86")
+}
+
+cmakeBuildX86.dependsOn cmakeConfigureX86
+```

gradle-plugin-cmake/build.gradle

@@ -0,0 +1,30 @@
+plugins {
+    alias(libs.plugins.publish)
+}
+
+apply plugin: 'com.gradle.plugin-publish'
+
+apply from: rootProject.file('gradle/compile/groovy.gradle')
+apply from: rootProject.file('gradle/test/junit5.gradle')
+
+dependencies {
+    api gradleApi()
+    testImplementation gradleTestKit()
+}
+
+if (project.hasProperty('gradle.publish.key')) {
+    gradlePlugin {
+        website = 'https://xbib.org/joerg/gradle-plugins/src/branch/main/gradle-plugin-cmake'
+        vcsUrl = 'https://xbib.org/joerg/gradle-plugins'
+        plugins {
+            cmakePlugin {
+                id = 'org.xbib.gradle.plugin.cmake'
+                implementationClass = 'org.xbib.gradle.plugin.cmake.CMakePlugin'
+                version = project.version
+                description = 'Gradle plugin for build with cmake'
+                displayName = 'Gradle Plugin for build with cmake'
+                tags.set(['cmake'])
+            }
+        }
+    }
+}

gradle-plugin-cmake/gradle.properties

@@ -0,0 +1,2 @@
+name = gradle-plugin-docker
+version = 3.1.0

gradle-plugin-cmake/src/main/java/org/xbib/gradle/plugin/cmake/CMakeBuildTask.java

@@ -0,0 +1,100 @@
+package org.xbib.gradle.plugin.cmake;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.gradle.api.DefaultTask;
+import org.gradle.api.file.DirectoryProperty;
+import org.gradle.api.provider.Property;
+import org.gradle.api.tasks.Input;
+import org.gradle.api.tasks.InputDirectory;
+import org.gradle.api.tasks.Optional;
+import org.gradle.api.tasks.TaskAction;
+
+/**
+ * Build a configured Build with CMake
+ */
+public class CMakeBuildTask extends DefaultTask {
+
+    private final Property<String> executable;
+
+    private final DirectoryProperty workingFolder;
+
+    private final Property<String> buildConfig;
+
+    private final Property<String> buildTarget;
+
+    private final Property<Boolean> buildClean;
+
+    public CMakeBuildTask() {
+        setGroup("cmake");
+        setDescription("Build a configured Build with CMake");
+        executable = getProject().getObjects().property(String.class);
+        workingFolder = getProject().getObjects().directoryProperty();
+        buildConfig = getProject().getObjects().property(String.class);
+        buildTarget = getProject().getObjects().property(String.class);
+        buildClean = getProject().getObjects().property(Boolean.class);
+    }
+
+    public void configureFromProject() {
+        CMakePluginExtension ext = (CMakePluginExtension) getProject().getExtensions().getByName("cmake");
+        executable.set(ext.getExecutable());
+        workingFolder.set(ext.getWorkingFolder());
+        buildConfig.set(ext.getBuildConfig());
+        buildTarget.set(ext.getBuildTarget());
+        buildClean.set(ext.getBuildClean());
+    }
+
+    @Input
+    @Optional
+    public Property<String> getExecutable() {
+        return executable;
+    }
+
+    @InputDirectory
+    public DirectoryProperty getWorkingFolder() {
+        return workingFolder;
+    }
+
+    @Input
+    @Optional
+    public Property<String> getBuildConfig() {
+        return buildConfig;
+    }
+
+    @Input
+    @Optional
+    public Property<String> getBuildTarget() {
+        return buildTarget;
+    }
+
+    @Input
+    @Optional
+    public Property<Boolean> getBuildClean() {
+        return buildClean;
+    }
+
+    private List<String> buildCmdLine() {
+        List<String> parameters = new ArrayList<>();
+        parameters.add(executable.getOrElse("cmake"));
+        parameters.add("--build");
+        parameters.add(".");
+        if (buildConfig.isPresent()) {
+            parameters.add("--config");
+            parameters.add(buildConfig.get());
+        }
+        if (buildTarget.isPresent()) {
+            parameters.add("--target");
+            parameters.add(buildTarget.get());
+        }
+        if (buildClean.getOrElse(Boolean.FALSE)) {
+            parameters.add("--clean-first");
+        }
+        return parameters;
+    }
+
+    @TaskAction
+    public void build() {
+        CMakeExecutor executor = new CMakeExecutor(getLogger(), getName());
+        executor.exec(buildCmdLine(), workingFolder.getAsFile().get());
+    }
+}

gradle-plugin-cmake/src/main/java/org/xbib/gradle/plugin/cmake/CMakeConfigureTask.java

@@ -0,0 +1,191 @@
+package org.xbib.gradle.plugin.cmake;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import org.gradle.api.DefaultTask;
+import org.gradle.api.file.DirectoryProperty;
+import org.gradle.api.provider.MapProperty;
+import org.gradle.api.provider.Property;
+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.api.tasks.TaskAction;
+
+public class CMakeConfigureTask extends DefaultTask {
+
+    private final Property<String> executable;
+
+    private final DirectoryProperty workingFolder;
+
+    private final DirectoryProperty sourceFolder;
+
+    private final Property<String> configurationTypes;
+
+    private final Property<String> installPrefix;
+
+    private final Property<String> generator; // for example: "Visual Studio 16 2019"
+
+    private final Property<String> platform; // for example "x64" or "Win32" or "ARM" or "ARM64", supported on vs > 8.0
+
+    private final Property<String> toolset; // for example "v142", supported on vs > 10.0
+
+    private final Property<Boolean> buildSharedLibs;
+
+    private final Property<Boolean> buildStaticLibs;
+
+    private final MapProperty<String, String> def;
+
+    public CMakeConfigureTask() {
+        setGroup("cmake");
+        setDescription("Configure a Build with CMake");
+        executable = getProject().getObjects().property(String.class);
+        workingFolder = getProject().getObjects().directoryProperty();
+        sourceFolder = getProject().getObjects().directoryProperty();
+        configurationTypes = getProject().getObjects().property(String.class);
+        installPrefix = getProject().getObjects().property(String.class);
+        generator = getProject().getObjects().property(String.class);
+        platform = getProject().getObjects().property(String.class);
+        toolset = getProject().getObjects().property(String.class);
+        buildSharedLibs = getProject().getObjects().property(Boolean.class);
+        buildStaticLibs = getProject().getObjects().property(Boolean.class);
+        def = getProject().getObjects().mapProperty(String.class, String.class);
+        // default values
+        workingFolder.set(new File(getProject().getLayout().getBuildDirectory().get().getAsFile(), "cmake"));
+        sourceFolder.set(new File(getProject().getLayout().getBuildDirectory().get().getAsFile(), "src" + File.separator + "main" + File.separator + "cpp"));
+    }
+
+    public void configureFromProject() {
+        CMakePluginExtension ext = (CMakePluginExtension) getProject().getExtensions().getByName("cmake");
+        executable.set(ext.getExecutable());
+        workingFolder.set(ext.getWorkingFolder());
+        sourceFolder.set(ext.getSourceFolder());
+        configurationTypes.set(ext.getConfigurationTypes());
+        installPrefix.set(ext.getInstallPrefix());
+        generator.set(ext.getGenerator());
+        platform.set(ext.getPlatform());
+        toolset.set(ext.getToolset());
+        buildSharedLibs.set(ext.getBuildSharedLibs());
+        buildStaticLibs.set(ext.getBuildStaticLibs());
+        def.set(ext.getDefs());
+    }
+
+    /// region getters
+    @Input
+    @Optional
+    public Property<String> getExecutable() {
+        return executable;
+    }
+
+    @OutputDirectory
+    public DirectoryProperty getWorkingFolder() {
+        return workingFolder;
+    }
+
+    @InputDirectory
+    public DirectoryProperty getSourceFolder() {
+        return sourceFolder;
+    }
+
+    @Input
+    @Optional
+    public Property<String> getConfigurationTypes() {
+        return configurationTypes;
+    }
+
+    @Input
+    @Optional
+    public Property<String> getInstallPrefix() {
+        return installPrefix;
+    }
+
+    @Input
+    @Optional
+    public Property<String> getGenerator() {
+        return generator;
+    }
+
+    @Input
+    @Optional
+    public Property<String> getPlatform() {
+        return platform;
+    }
+
+    @Input
+    @Optional
+    public Property<String> getToolset() {
+        return toolset;
+    }
+
+    @Input
+    @Optional
+    public Property<Boolean> getBuildSharedLibs() {
+        return buildSharedLibs;
+    }
+
+    @Input
+    @Optional
+    public Property<Boolean> getBuildStaticLibs() {
+        return buildStaticLibs;
+    }
+
+    @Input
+    @Optional
+    public MapProperty<String, String> getDef() {
+        return def;
+    }
+    /// endregion
+
+    private List<String> buildCmdLine() {
+        List<String> parameters = new ArrayList<>();
+
+        parameters.add(executable.getOrElse("cmake"));
+
+        if (generator.isPresent() && !generator.get().isEmpty()) {
+            parameters.add("-G");
+            parameters.add(generator.get());
+        }
+
+        if (platform.isPresent() && !platform.get().isEmpty()) {
+            parameters.add("-A");
+            parameters.add(platform.get());
+        }
+
+        if (toolset.isPresent() && !toolset.get().isEmpty()) {
+            parameters.add("-T");
+            parameters.add(toolset.get());
+        }
+
+        if (configurationTypes.isPresent() && !configurationTypes.get().isEmpty())
+            parameters.add("-DCMAKE_CONFIGURATION_TYPES=" + configurationTypes.get());
+
+        if (installPrefix.isPresent() && !installPrefix.get().isEmpty())
+            parameters.add("-DCMAKE_INSTALL_PREFIX=" + installPrefix.get());
+
+
+        if (buildSharedLibs.isPresent())
+            parameters.add("-DBUILD_SHARED_LIBS=" + (buildSharedLibs.get() ? "ON" : "OFF"));
+
+        if (buildStaticLibs.isPresent())
+            parameters.add("-DBUILD_STATIC_LIBS=" + (buildStaticLibs.get() ? "ON" : "OFF"));
+
+
+        if (def.isPresent()) {
+            for (Map.Entry<String, String> entry : def.get().entrySet())
+                parameters.add("-D" + entry.getKey() + "=" + entry.getValue());
+        }
+
+        parameters.add(sourceFolder.getAsFile().get().getAbsolutePath());
+
+        return parameters;
+    }
+
+    @TaskAction
+    public void configure() {
+        CMakeExecutor executor = new CMakeExecutor(getLogger(), getName());
+        executor.exec(buildCmdLine(), workingFolder.getAsFile().get());
+    }
+
+}

gradle-plugin-cmake/src/main/java/org/xbib/gradle/plugin/cmake/CMakeExecutor.java

@@ -0,0 +1,83 @@
+package org.xbib.gradle.plugin.cmake;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.List;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+import java.util.stream.Stream;
+import org.gradle.api.GradleException;
+import org.gradle.api.GradleScriptException;
+import org.gradle.api.logging.Logger;
+
+public class CMakeExecutor {
+
+    private final Logger logger;
+    private final String taskName;
+
+    CMakeExecutor(final Logger logger, final String taskName) {
+        this.logger = logger;
+        this.taskName = taskName;
+    }
+
+    protected void exec(final List<String> cmdLine, final File workingFolder) throws GradleException {
+        // log command line parameters
+        StringBuilder sb = new StringBuilder("  CMakePlugin.task " + taskName + " - exec: ");
+        for (String s : cmdLine) {
+            sb.append(s).append(" ");
+        }
+        logger.info(sb.toString());
+        ProcessBuilder pb = new ProcessBuilder(cmdLine);
+        pb.directory(workingFolder);
+        try (ExecutorService executor = Executors.newFixedThreadPool(2)) {
+            // make sure working folder exists
+            boolean b = workingFolder.mkdirs();
+            // start
+            Process process = pb.start();
+            Future<Void> stdoutFuture = executor.submit(() -> {
+                readStream(process.getInputStream(), true);
+                return null;
+            });
+            Future<Void> stderrFuture = executor.submit(() -> {
+                readStream(process.getErrorStream(), false);
+                return null;
+            });
+            int retCode = process.waitFor();
+            warnIfTimeout(stdoutFuture,
+                    "CMakeExecutor[" + taskName + "]Warn: timed out waiting for stdout to be closed.");
+            warnIfTimeout(stderrFuture,
+                    "CMakeExecutor[" + taskName + "]Warn: timed out waiting for stderr to be closed.");
+            if (retCode != 0) {
+                throw new GradleException("[" + taskName + "]Error: CMAKE returned " + retCode);
+            }
+        } catch (IOException | InterruptedException | ExecutionException e) {
+            throw new GradleScriptException("CMakeExecutor[" + taskName + "].", e);
+        }
+    }
+
+    private void readStream(final InputStream inputStream, boolean isStdOut) {
+        final Stream<String> lines = new BufferedReader(new InputStreamReader(inputStream)).lines();
+        if (isStdOut) {
+            lines.forEach(logger::info);
+        } else {
+            lines.forEach(logger::error);
+        }
+    }
+
+    private void warnIfTimeout(final Future<Void> future, final String message)
+            throws ExecutionException, InterruptedException {
+        try {
+            future.get(3, TimeUnit.SECONDS);
+        } catch (TimeoutException e) {
+            logger.warn(message);
+        }
+    }
+}
+

gradle-plugin-cmake/src/main/java/org/xbib/gradle/plugin/cmake/CMakePlugin.java

@@ -0,0 +1,141 @@
+package org.xbib.gradle.plugin.cmake;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import org.gradle.api.GradleException;
+import org.gradle.api.GradleScriptException;
+import org.gradle.api.Plugin;
+import org.gradle.api.Project;
+import org.gradle.api.Task;
+import org.gradle.api.logging.LogLevel;
+import org.gradle.api.tasks.TaskContainer;
+
+public class CMakePlugin implements Plugin<Project> {
+
+    private static final String CMAKE_CONFIGURE = "cmakeConfigure";
+
+    private static final String CMAKE_BUILD = "cmakeBuild";
+
+    private boolean deleteDirectory(File directoryToBeDeleted) {
+        File[] allContents = directoryToBeDeleted.listFiles();
+        if (allContents != null) {
+            for (File file : allContents) {
+                deleteDirectory(file);
+            }
+        }
+        return directoryToBeDeleted.delete();
+    }
+
+    @Override
+    public void apply(Project project) {
+        project.getPlugins().apply("base");
+        final CMakePluginExtension extension = project.getExtensions()
+                .create("cmake", CMakePluginExtension.class, project);
+        final Task cmakeClean = project.task("cmakeClean").doFirst(task -> {
+            File workingFolder = extension.getWorkingFolder().getAsFile().get().getAbsoluteFile();
+            if (workingFolder.exists()) {
+                project.getLogger().info("Deleting folder " + workingFolder);
+                if (!deleteDirectory(workingFolder)) {
+                    throw new GradleException("Could not delete working folder " + workingFolder);
+                }
+            }
+        });
+        cmakeClean.setGroup("cmake");
+        cmakeClean.setDescription("Clean CMake configuration");
+        final Task cmakeGenerators = project.task("cmakeGenerators").doFirst(task -> {
+            ProcessBuilder pb = new ProcessBuilder(extension.getExecutable().getOrElse("cmake"),
+                    "--help");
+            try {
+                // start
+                Process process = pb.start();
+                BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
+                String line;
+                boolean foundGenerators = false;
+                while ((line = reader.readLine()) != null) {
+                    if (line.equals("Generators")) {
+                        foundGenerators = true;
+                    }
+                    if (foundGenerators) {
+                        project.getLogger().log(LogLevel.QUIET, line);
+                    }
+                }
+                process.waitFor();
+            } catch (IOException | InterruptedException e) {
+                throw new GradleScriptException("cmake --help failed.", e);
+            }
+        });
+        cmakeGenerators.setGroup("cmake");
+        cmakeGenerators.setDescription("List available CMake generators");
+        project.afterEvaluate(p -> {
+            final TaskContainer tasks = project.getTasks();
+            if (extension.getTargets().getTargetContainer().isEmpty()) {
+                p.getTasks().register(CMAKE_CONFIGURE, CMakeConfigureTask.class, task -> {
+                    task.getExecutable().set(extension.getExecutable());
+                    task.getWorkingFolder().set(extension.getWorkingFolder());
+                    task.getSourceFolder().set(extension.getSourceFolder());
+                    task.getConfigurationTypes().set(extension.getConfigurationTypes());
+                    task.getInstallPrefix().set(extension.getInstallPrefix());
+                    task.getGenerator().set(extension.getGenerator());
+                    task.getPlatform().set(extension.getPlatform());
+                    task.getToolset().set(extension.getToolset());
+                    task.getBuildSharedLibs().set(extension.getBuildSharedLibs());
+                    task.getBuildStaticLibs().set(extension.getBuildStaticLibs());
+                    task.getDef().set(extension.getDefs().isPresent() ? extension.getDefs() : extension.getDef());
+                });
+
+                p.getTasks().register(CMAKE_BUILD, CMakeBuildTask.class, task -> {
+                    task.getExecutable().set(extension.getExecutable());
+                    task.getWorkingFolder().set(extension.getWorkingFolder());
+                    task.getBuildConfig().set(extension.getBuildConfig());
+                    task.getBuildTarget().set(extension.getBuildTarget());
+                    task.getBuildClean().set(extension.getBuildClean());
+                });
+            } else {
+                extension.getTargets().getTargetContainer().getAsMap()
+                        .forEach((name, target) -> {
+                            tasks.register(CMAKE_CONFIGURE + name, CMakeConfigureTask.class, task -> {
+                                task.configureFromProject();
+                                if (target.getExecutable().isPresent())
+                                    task.getExecutable().set(target.getExecutable());
+                                if (target.getWorkingFolder().isPresent())
+                                    task.getWorkingFolder().set(target.getWorkingFolder());
+                                if (target.getSourceFolder().isPresent())
+                                    task.getSourceFolder().set(target.getSourceFolder());
+                                if (target.getConfigurationTypes().isPresent())
+                                    task.getConfigurationTypes().set(target.getConfigurationTypes());
+                                if (target.getInstallPrefix().isPresent())
+                                    task.getInstallPrefix().set(target.getInstallPrefix());
+                                if (target.getGenerator().isPresent()) task.getGenerator().set(target.getGenerator());
+                                if (target.getPlatform().isPresent()) task.getPlatform().set(target.getPlatform());
+                                if (target.getToolset().isPresent()) task.getToolset().set(target.getToolset());
+                                if (target.getBuildSharedLibs().isPresent())
+                                    task.getBuildSharedLibs().set(target.getBuildSharedLibs());
+                                if (target.getBuildStaticLibs().isPresent())
+                                    task.getBuildStaticLibs().set(target.getBuildStaticLibs());
+                                if (target.getDefs().isPresent()) task.getDef().set(target.getDefs());
+                            });
+                            tasks.register(CMAKE_BUILD + name, CMakeBuildTask.class, task -> {
+                                task.configureFromProject();
+                                if (target.getExecutable().isPresent())
+                                    task.getExecutable().set(target.getExecutable());
+                                if (target.getWorkingFolder().isPresent())
+                                    task.getWorkingFolder().set(target.getWorkingFolder());
+                                if (target.getBuildConfig().isPresent())
+                                    task.getBuildConfig().set(target.getBuildConfig());
+                                if (target.getBuildTarget().isPresent())
+                                    task.getBuildTarget().set(target.getBuildTarget());
+                                if (target.getBuildClean().isPresent())
+                                    task.getBuildClean().set(target.getBuildClean());
+                            });
+                        });
+            }
+            tasks.withType(CMakeBuildTask.class)
+                    .forEach(task -> task.dependsOn(tasks.withType(CMakeConfigureTask.class)));
+            p.getTasks().named("clean").configure(task -> task.dependsOn("cmakeClean"));
+            p.getTasks().named("build").configure(task -> task.dependsOn(tasks.withType(
+                    CMakeBuildTask.class)));
+        });
+    }
+}

gradle-plugin-cmake/src/main/java/org/xbib/gradle/plugin/cmake/CMakePluginExtension.java

@@ -0,0 +1,121 @@
+package org.xbib.gradle.plugin.cmake;
+
+import java.io.File;
+import org.gradle.api.Project;
+import org.gradle.api.file.DirectoryProperty;
+import org.gradle.api.provider.MapProperty;
+import org.gradle.api.provider.Property;
+
+public class CMakePluginExtension {
+
+    // parameters used by config and build step
+    private final Property<String> executable;
+    private final DirectoryProperty workingFolder;
+
+    // parameters used by config step
+    private final DirectoryProperty sourceFolder;
+    private final Property<String> configurationTypes;
+    private final Property<String> installPrefix;
+    private final Property<String> generator; // for example: "Visual Studio 16 2019"
+
+    private final Property<String> platform; // for example "x64" or "Win32" or "ARM" or "ARM64", supported on vs > 8.0
+    private final Property<String> toolset; // for example "v142", supported on vs > 10.0
+    private final Property<Boolean> buildSharedLibs;
+    private final Property<Boolean> buildStaticLibs;
+    private final MapProperty<String, String> defs;
+    private final MapProperty<String, String> def;
+
+    // parameters used on build step
+    private final Property<String> buildConfig;
+    private final Property<String> buildTarget;
+    private final Property<Boolean> buildClean;
+    private final TargetListExtension targets;
+    private final Project project;
+
+    public CMakePluginExtension(Project project) {
+        executable = project.getObjects().property(String.class);
+        workingFolder = project.getObjects().directoryProperty();
+        sourceFolder = project.getObjects().directoryProperty();
+        configurationTypes = project.getObjects().property(String.class);
+        installPrefix = project.getObjects().property(String.class);
+        generator = project.getObjects().property(String.class);
+        platform = project.getObjects().property(String.class);
+        toolset = project.getObjects().property(String.class);
+        buildSharedLibs = project.getObjects().property(Boolean.class);
+        buildStaticLibs = project.getObjects().property(Boolean.class);
+        defs = project.getObjects().mapProperty(String.class, String.class);
+        def = project.getObjects().mapProperty(String.class, String.class); // for backwards compat
+        buildConfig = project.getObjects().property(String.class);
+        buildTarget = project.getObjects().property(String.class);
+        buildClean = project.getObjects().property(Boolean.class);
+        this.targets = project.getObjects().newInstance(TargetListExtension.class, project);
+        // default values
+        workingFolder.set(new File(project.getLayout().getBuildDirectory().get().getAsFile(), "cmake"));
+        sourceFolder.set(new File(project.getLayout().getBuildDirectory().get().getAsFile(), "src" + File.separator + "main" + File.separator + "cpp"));
+        this.project = project;
+    }
+
+    public Property<String> getExecutable() {
+        return executable;
+    }
+
+    public DirectoryProperty getWorkingFolder() {
+        return workingFolder;
+    }
+
+    public DirectoryProperty getSourceFolder() {
+        return sourceFolder;
+    }
+
+    public Property<String> getConfigurationTypes() {
+        return configurationTypes;
+    }
+
+    public Property<String> getInstallPrefix() {
+        return installPrefix;
+    }
+
+    public Property<String> getGenerator() {
+        return generator;
+    }
+
+    public Property<String> getPlatform() {
+        return platform;
+    }
+
+    public Property<String> getToolset() {
+        return toolset;
+    }
+
+    public Property<Boolean> getBuildSharedLibs() {
+        return buildSharedLibs;
+    }
+
+    public Property<Boolean> getBuildStaticLibs() {
+        return buildStaticLibs;
+    }
+
+    public MapProperty<String, String> getDef() {
+        return def;
+    }
+
+    public MapProperty<String, String> getDefs() {
+        return defs;
+    }
+
+    public Property<String> getBuildConfig() {
+        return buildConfig;
+    }
+
+    public Property<String> getBuildTarget() {
+        return buildTarget;
+    }
+
+    public Property<Boolean> getBuildClean() {
+        return buildClean;
+    }
+
+    public TargetListExtension getTargets() {
+        return targets;
+    }
+}

gradle-plugin-cmake/src/main/java/org/xbib/gradle/plugin/cmake/TargetExtension.java

@@ -0,0 +1,174 @@
+package org.xbib.gradle.plugin.cmake;
+
+import java.io.File;
+import java.util.Map;
+import org.gradle.api.Project;
+import org.gradle.api.file.DirectoryProperty;
+import org.gradle.api.provider.MapProperty;
+import org.gradle.api.provider.Property;
+
+public class TargetExtension {
+
+    // parameters used by config and build step
+    private final Property<String> executable;
+    private final DirectoryProperty workingFolder;
+
+    // parameters used by config step
+    private final DirectoryProperty sourceFolder;
+    private final Property<String> configurationTypes;
+    private final Property<String> installPrefix;
+    private final Property<String> generator; // for example: "Visual Studio 16 2019"
+    private final Property<String> platform; // for example "x64" or "Win32" or "ARM" or "ARM64", supported on vs > 8.0
+    private final Property<String> toolset; // for example "v142", supported on vs > 10.0
+    private final Property<Boolean> buildSharedLibs;
+    private final Property<Boolean> buildStaticLibs;
+    private final MapProperty<String, String> defs;
+
+    // parameters used on build step
+    private final Property<String> buildConfig;
+    private final Property<String> buildTarget;
+    private final Property<Boolean> buildClean;
+    private final String name;
+
+    public TargetExtension(final Project project, final String name) {
+        executable = project.getObjects().property(String.class);
+        workingFolder = project.getObjects().directoryProperty();
+        sourceFolder = project.getObjects().directoryProperty();
+        configurationTypes = project.getObjects().property(String.class);
+        installPrefix = project.getObjects().property(String.class);
+        generator = project.getObjects().property(String.class);
+        platform = project.getObjects().property(String.class);
+        toolset = project.getObjects().property(String.class);
+        buildSharedLibs = project.getObjects().property(Boolean.class);
+        buildStaticLibs = project.getObjects().property(Boolean.class);
+        defs = project.getObjects().mapProperty(String.class, String.class);
+        buildConfig = project.getObjects().property(String.class);
+        buildTarget = project.getObjects().property(String.class);
+        buildClean = project.getObjects().property(Boolean.class);
+        this.name = name;
+    }
+
+    public Property<String> getExecutable() {
+        return executable;
+    }
+
+    public DirectoryProperty getWorkingFolder() {
+        return workingFolder;
+    }
+
+    public DirectoryProperty getSourceFolder() {
+        return sourceFolder;
+    }
+
+    public Property<String> getConfigurationTypes() {
+        return configurationTypes;
+    }
+
+    public Property<String> getInstallPrefix() {
+        return installPrefix;
+    }
+
+    public Property<String> getGenerator() {
+        return generator;
+    }
+
+    public Property<String> getPlatform() {
+        return platform;
+    }
+
+    public Property<String> getToolset() {
+        return toolset;
+    }
+
+    public Property<Boolean> getBuildSharedLibs() {
+        return buildSharedLibs;
+    }
+
+    public Property<Boolean> getBuildStaticLibs() {
+        return buildStaticLibs;
+    }
+
+    public MapProperty<String, String> getDefs() {
+        return defs;
+    }
+
+    public Property<String> getBuildConfig() {
+        return buildConfig;
+    }
+
+    public Property<String> getBuildTarget() {
+        return buildTarget;
+    }
+
+    public Property<Boolean> getBuildClean() {
+        return buildClean;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setExecutable(String executable) {
+        this.executable.set(executable);
+    }
+
+    public void setWorkingFolder(File workingFolder) {
+        this.workingFolder.set(workingFolder);
+    }
+
+    public void setWorkingFolder(String workingFolder) {
+        this.workingFolder.set(new File(workingFolder));
+    }
+
+    public void setSourceFolder(File sourceFolder) {
+        this.sourceFolder.set(sourceFolder);
+    }
+
+    public void setSourceFolder(String sourceFolder) {
+        this.sourceFolder.set(new File(sourceFolder));
+    }
+
+    public void setConfigurationTypes(String configurationTypes) {
+        this.configurationTypes.set(configurationTypes);
+    }
+
+    public void setInstallPrefix(String installPrefix) {
+        this.installPrefix.set(installPrefix);
+    }
+
+    public void setGenerator(String generator) {
+        this.generator.set(generator);
+    }
+
+    public void setPlatform(String platform) {
+        this.platform.set(platform);
+    }
+
+    public void setToolset(String toolset) {
+        this.toolset.set(toolset);
+    }
+
+    public void setBuildSharedLibs(Boolean buildSharedLibs) {
+        this.buildSharedLibs.set(buildSharedLibs);
+    }
+
+    public void setBuildStaticLibs(Boolean buildStaticLibs) {
+        this.buildStaticLibs.set(buildStaticLibs);
+    }
+
+    public void setDefs(Map<String, String> defs) {
+        this.defs.set(defs);
+    }
+
+    public void setBuildConfig(String buildConfig) {
+        this.buildConfig.set(buildConfig);
+    }
+
+    public void setBuildTarget(String buildTarget) {
+        this.buildTarget.set(buildTarget);
+    }
+
+    public void setBuildClean(Boolean buildClean) {
+        this.buildClean.set(buildClean);
+    }
+}

gradle-plugin-cmake/src/main/java/org/xbib/gradle/plugin/cmake/TargetListExtension.java

@@ -0,0 +1,31 @@
+package org.xbib.gradle.plugin.cmake;
+
+import groovy.lang.Closure;
+import groovy.lang.MissingMethodException;
+import javax.inject.Inject;
+import org.gradle.api.NamedDomainObjectContainer;
+import org.gradle.api.Project;
+
+public class TargetListExtension {
+
+    @Inject
+    public TargetListExtension(Project project) {
+        targetContainer = project.container(TargetExtension.class, name -> new TargetExtension(project, name));
+    }
+
+    private final NamedDomainObjectContainer<TargetExtension> targetContainer;
+
+    public NamedDomainObjectContainer<TargetExtension> getTargetContainer() {
+        return targetContainer;
+    }
+
+    public Object methodMissing(String name, Object args) {
+        if (args instanceof Object[] && ((Object[]) args)[0] instanceof Closure<?> closure) {
+            return targetContainer.create(name, closure);
+        } else {
+            final Object[] normalizedArgs;
+            normalizedArgs = args instanceof Object[] ? (Object[]) args : new Object[]{args};
+            throw new MissingMethodException(name, this.getClass(), normalizedArgs);
+        }
+    }
+}

gradle-plugin-cmake/src/test/groovy/org/xbib/gradle/plugin/cmake/test/CmakePluginIntegrationTest.groovy

@@ -0,0 +1,56 @@
+package org.xbib.gradle.plugin.cmake.test
+
+import org.gradle.testkit.runner.BuildResult
+import org.gradle.testkit.runner.GradleRunner
+import org.gradle.testkit.runner.TaskOutcome
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.condition.DisabledOnOs
+import org.junit.jupiter.api.condition.OS
+import org.junit.jupiter.api.io.TempDir
+
+import static org.junit.jupiter.api.Assertions.assertEquals
+
+@DisabledOnOs(OS.MAC)
+class CmakePluginIntegrationTest {
+
+    private File projectDir
+
+    private File settingsFile
+
+    private File buildFile
+
+    @BeforeEach
+    void setup(@TempDir File testProjectDir) throws IOException {
+        this.projectDir = testProjectDir
+        File f = new File(testProjectDir, 'build/src/main/cpp')
+        f.mkdirs()
+        File cmakeList = new File(f, 'CMakeLists.txt')
+        cmakeList.write('')
+        this.settingsFile = new File(testProjectDir, "settings.gradle")
+        this.buildFile = new File(testProjectDir, "build.gradle")
+    }
+
+    @Test
+    void testPlugin() {
+        String settingsFileContent = '''
+rootProject.name = 'cmake-test'
+'''
+        settingsFile.write(settingsFileContent)
+        String buildFileContent = '''
+
+plugins {
+    id 'org.xbib.gradle.plugin.cmake'
+}
+
+'''
+        buildFile.write(buildFileContent)
+        BuildResult result = GradleRunner.create()
+                .withProjectDir(projectDir)
+                .withPluginClasspath()
+                .withArguments(":cmakeConfigure", "--info", "--stacktrace", "--warning-mode=all")
+                .forwardOutput()
+                .build()
+        assertEquals(TaskOutcome.SUCCESS, result.task(":cmakeConfigure").getOutcome())
+    }
+}

gradle-plugin-docker/build.gradle

@@ -1,12 +1,11 @@
 plugins {
-    id 'java-gradle-plugin'
     alias(libs.plugins.publish)
 }
 
-apply plugin: 'java-gradle-plugin'
 apply plugin: 'com.gradle.plugin-publish'
 
 apply from: rootProject.file('gradle/compile/groovy.gradle')
+apply from: rootProject.file('gradle/test/junit5.gradle')
 
 dependencies {
     api gradleApi()

gradle-plugin-docker/gradle.properties

@@ -1,2 +1,2 @@
 name = gradle-plugin-docker
-version = 3.0.2
+version = 3.1.0

gradle-plugin-docker/src/test/groovy/org/xbib/gradle/plugin/docker/DockerPluginIntegrationTest.groovy

@@ -5,10 +5,13 @@ import org.gradle.testkit.runner.GradleRunner
 import org.gradle.testkit.runner.TaskOutcome
 import org.junit.jupiter.api.BeforeEach
 import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.condition.DisabledOnOs
+import org.junit.jupiter.api.condition.OS
 import org.junit.jupiter.api.io.TempDir
 
 import static org.junit.jupiter.api.Assertions.assertEquals
 
+@DisabledOnOs(OS.MAC)
 class DockerPluginIntegrationTest {
 
     private File projectDir

gradle-plugin-git/build.gradle

@@ -7,12 +7,13 @@ apply plugin: 'java-gradle-plugin'
 apply plugin: 'com.gradle.plugin-publish'
 
 apply from: rootProject.file('gradle/compile/groovy.gradle')
+apply from: rootProject.file('gradle/test/junit5.gradle')
 
 dependencies {
     api gradleApi()
     api libs.groovy.git
     testImplementation gradleTestKit()
-    testImplementation  libs.spock.core
+    testImplementation testLibs.spock.core
     testImplementation testLibs.junit4
 }
 

gradle-plugin-git/gradle.properties

@@ -1,2 +1,2 @@
 name = gradle-plugin-docker
-version = 3.0.2
+version = 3.1.0

gradle-plugin-j2html/build.gradle

@@ -0,0 +1,34 @@
+plugins {
+    id 'java-gradle-plugin'
+    alias(libs.plugins.publish)
+}
+
+apply plugin: 'java-gradle-plugin'
+apply plugin: 'com.gradle.plugin-publish'
+
+apply from: rootProject.file('gradle/compile/groovy.gradle')
+apply from: rootProject.file('gradle/test/junit5.gradle')
+
+dependencies {
+    api gradleApi()
+    implementation libs.jsoup
+    implementation libs.javapoet
+    testImplementation gradleTestKit()
+}
+
+if (project.hasProperty('gradle.publish.key')) {
+    gradlePlugin {
+        website = 'https://xbib.org/joerg/gradle-plugins/src/branch/main/gradle-plugin-j2html'
+        vcsUrl = 'https://xbib.org/joerg/gradle-plugins'
+        plugins {
+            j2htmlPlugin {
+                id = 'org.xbib.gradle.plugin.j2html'
+                implementationClass = 'org.xbib.gradle.plugin.j2html.J2HtmlPlugin'
+                version = project.version
+                description = 'Gradle J2HTML plugin'
+                displayName = 'Gradle J2HTML plugin'
+                tags.set(['j2html'])
+            }
+        }
+    }
+}

gradle-plugin-j2html/src/main/java/com/j2html/codegen/App.java

@@ -0,0 +1,33 @@
+package com.j2html.codegen;
+
+import com.j2html.codegen.generators.SpecializedTagClassCodeGenerator;
+import com.j2html.codegen.generators.AttributeInterfaceCodeGenerator;
+
+import java.io.IOException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+public final class App
+{
+    public static void main( String[] args )
+    {
+        final Path relPath = Paths.get("../library/src/main/java/j2html/");
+        final Path absPath = relPath.toAbsolutePath();
+
+        System.out.println("writing in "+absPath);
+
+        //decide if the files should be
+        //deleted or generated
+        final boolean delete = false;
+
+        try {
+            AttributeInterfaceCodeGenerator.generate(absPath, delete);
+            SpecializedTagClassCodeGenerator.generate(absPath, delete);
+            //TagCreatorCodeGenerator.print();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        //don't forget to auto-reformat the generated code.
+    }
+}

gradle-plugin-j2html/src/main/java/com/j2html/codegen/Export.java

@@ -0,0 +1,50 @@
+package com.j2html.codegen;
+
+import com.j2html.codegen.model.AttrD;
+
+import static com.j2html.codegen.generators.TagCreatorCodeGenerator.containerTags;
+import static com.j2html.codegen.generators.TagCreatorCodeGenerator.emptyTags;
+import static com.j2html.codegen.model.AttributesList.attributesDescriptive;
+import static com.j2html.codegen.model.AttributesList.getCustomAttributesForHtmlTag;
+import static java.lang.System.*;
+
+public class Export {
+
+    public static void main(String[] args){
+        for (final String tag : emptyTags()) {
+            out.print("EMPTY-ELEMENT[");
+            out.print(tag);
+            out.print("]");
+            out.println();
+        }
+        for (final String tag : containerTags()) {
+            out.print("ELEMENT[");
+            out.print(tag);
+            out.print("]");
+            out.println();
+        }
+
+        out.println();
+
+        for(AttrD attr : attributesDescriptive()){
+            if(attr.hasArgument){
+                out.print("STRING");
+            }else{
+                out.print("BOOLEAN");
+            }
+            out.print("[");
+            out.print(attr.attr);
+            out.print("]");
+            out.println();
+            for(String tag : attr.tags){
+                out.print("ATTRIBUTE[");
+                out.print(tag);
+                out.print(":");
+                out.print(attr.attr);
+                out.print("]");
+                out.println();
+            }
+            out.println();
+        }
+    }
+}

gradle-plugin-j2html/src/main/java/com/j2html/codegen/Generator.java

@@ -0,0 +1,199 @@
+package com.j2html.codegen;
+
+import com.j2html.codegen.Model.Node;
+import com.squareup.javapoet.*;
+
+import javax.lang.model.element.Modifier;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.HashMap;
+import java.util.Map;
+
+import static com.j2html.codegen.Model.Metadata.ON_OFF;
+import static com.j2html.codegen.Model.Metadata.SELF_CLOSING;
+
+public class Generator {
+
+    public static final ClassName INSTANCE = ClassName.get("j2html.tags", "IInstance");
+    public static final ClassName TAG = ClassName.get("j2html.tags", "Tag");
+    public static final ClassName EMPTY_TAG = ClassName.get("j2html.tags", "EmptyTag");
+    public static final ClassName CONTAINER_TAG = ClassName.get("j2html.tags", "ContainerTag");
+
+    public static void main(String... args) throws IOException {
+        Path path = Paths.get("j2html-codegen", "src", "test", "resources", "html.model");
+        String definitions = new String(Files.readAllBytes(path));
+        Model model = new Model();
+        Parser.parse(definitions, model);
+
+        Path dir = Paths.get("/j2html/generated-source");
+        Files.createDirectories(dir);
+        generate(dir, "j2html.tags.attributes", "j2html.tags.specialized", model);
+    }
+
+    public static void generate(Path root, String attributePkg, String elementPkg, Model model) throws IOException {
+        Map<String, JavaFile> attributes = generateAttributePackage(attributePkg, model);
+        for (JavaFile file : attributes.values()) {
+            file.writeTo(root);
+        }
+
+        Map<String, JavaFile> elements = generateElementPackage(elementPkg, model, attributes);
+        for (JavaFile file : elements.values()) {
+            file.writeTo(root);
+        }
+    }
+
+    private static Map<String, JavaFile> generateElementPackage(String pkg, Model model, Map<String, JavaFile> attributes) {
+        Map<String, JavaFile> files = new HashMap<>();
+
+        // Convert all elements into classes.
+        for (Node element : model.elements()) {
+            ClassName className = ClassName.get(pkg, capitalize(element.name) + "Tag");
+
+            TypeSpec.Builder type = defineElementClass(element, className);
+
+            // Assign attributes to this element.
+            for (Node attribute : element.children) {
+                JavaFile file = attributes.get(attribute.name);
+                type.addSuperinterface(
+                    ParameterizedTypeName.get(
+                        ClassName.get(file.packageName, file.typeSpec.name),
+                        className
+                    )
+                );
+            }
+
+            files.put(
+                element.name,
+                JavaFile.builder(pkg, type.build())
+                    .skipJavaLangImports(true)
+                    .build()
+            );
+        }
+
+        return files;
+    }
+
+    private static Map<String, JavaFile> generateAttributePackage(String pkg, Model model) {
+        Map<String, JavaFile> files = new HashMap<>();
+
+        // Convert all attributes into classes.
+        for (Node attribute : model.attributes()) {
+            TypeSpec.Builder type = defineAttributeClass(pkg, attribute);
+
+            if (attribute.type.equals(Node.Type.STRING)) {
+                defineStringAttributeMethods(attribute, type);
+            } else if (attribute.type.equals(Node.Type.BOOLEAN) && !attribute.is(ON_OFF)) {
+                defineBooleanAttributeMethods(attribute, type);
+            } else if (attribute.type.equals(Node.Type.BOOLEAN) && attribute.is(ON_OFF)) {
+                defineOnOffAttributeMethods(attribute, type);
+            }
+
+            files.put(
+                attribute.name,
+                JavaFile.builder(pkg, type.build())
+                    .skipJavaLangImports(true)
+                    .build()
+            );
+        }
+
+        return files;
+    }
+
+    private static TypeSpec.Builder defineElementClass(Node element, ClassName className) {
+        MethodSpec constructor = MethodSpec.constructorBuilder()
+            .addModifiers(Modifier.PUBLIC)
+            .addStatement("super(\"" + element.name + "\")")
+            .build();
+
+        TypeSpec.Builder type = TypeSpec.classBuilder(className)
+            .addModifiers(Modifier.PUBLIC)
+            .superclass(
+                ParameterizedTypeName.get(element.is(SELF_CLOSING) ? EMPTY_TAG : CONTAINER_TAG, className)
+            )
+            .addMethod(constructor);
+        return type;
+    }
+
+    private static TypeSpec.Builder defineAttributeClass(String pkg, Node attribute) {
+        ClassName name = ClassName.get(pkg, "I" + capitalize(attribute.name));
+        return TypeSpec.interfaceBuilder(name)
+            .addSuperinterface(ParameterizedTypeName.get(INSTANCE, TypeVariableName.get("T")))
+            .addTypeVariable(TypeVariableName.get("T", ParameterizedTypeName.get(TAG, TypeVariableName.get("T"))))
+            .addModifiers(Modifier.PUBLIC);
+    }
+
+    private static void defineBooleanAttributeMethods(Node attribute, TypeSpec.Builder type) {
+        MethodSpec with = MethodSpec.methodBuilder(methodName("is", attribute.name))
+            .addModifiers(Modifier.PUBLIC, Modifier.DEFAULT)
+            .addStatement("return self().attr(\"" + attribute.name + "\")")
+            .returns(TypeVariableName.get("T"))
+            .build();
+
+        MethodSpec withCond = MethodSpec.methodBuilder(methodName("withCond", attribute.name))
+            .addModifiers(Modifier.PUBLIC, Modifier.DEFAULT)
+            .addParameter(TypeName.BOOLEAN, "enable", Modifier.FINAL)
+            .addStatement("return enable ? self().attr(\"" + attribute.name + "\") : self()")
+            .returns(TypeVariableName.get("T"))
+            .build();
+
+        type.addMethod(with);
+        type.addMethod(withCond);
+    }
+
+    private static void defineOnOffAttributeMethods(Node attribute, TypeSpec.Builder type) {
+        MethodSpec with = MethodSpec.methodBuilder(methodName("is", attribute.name))
+            .addModifiers(Modifier.PUBLIC, Modifier.DEFAULT)
+            .addStatement("return self().attr(\"" + attribute.name + "\", \"on\")")
+            .returns(TypeVariableName.get("T"))
+            .build();
+
+        MethodSpec withCond = MethodSpec.methodBuilder(methodName("withCond", attribute.name))
+            .addModifiers(Modifier.PUBLIC, Modifier.DEFAULT)
+            .addParameter(TypeName.BOOLEAN, "enable", Modifier.FINAL)
+            .addStatement("return enable ? self().attr(\"" + attribute.name + "\", \"on\") : self()")
+            .returns(TypeVariableName.get("T"))
+            .build();
+
+        type.addMethod(with);
+        type.addMethod(withCond);
+    }
+
+    private static void defineStringAttributeMethods(Node attribute, TypeSpec.Builder type) {
+        MethodSpec with = MethodSpec.methodBuilder(methodName("with", attribute.name))
+            .addModifiers(Modifier.PUBLIC, Modifier.DEFAULT)
+            .addParameter(String.class, parameter(attribute), Modifier.FINAL)
+            .addStatement("return self().attr(\"" + attribute.name + "\", " + parameter(attribute) + ")")
+            .returns(TypeVariableName.get("T"))
+            .build();
+
+        MethodSpec withCond = MethodSpec.methodBuilder(methodName("withCond", attribute.name))
+            .addModifiers(Modifier.PUBLIC, Modifier.DEFAULT)
+            .addParameter(TypeName.BOOLEAN, "enable", Modifier.FINAL)
+            .addParameter(String.class, parameter(attribute), Modifier.FINAL)
+            .addStatement("return enable ? self().attr(\"" + attribute.name + "\", " + parameter(attribute) + ") : self()")
+            .returns(TypeVariableName.get("T"))
+            .build();
+
+        type.addMethod(with);
+        type.addMethod(withCond);
+    }
+
+    private static String parameter(Node attribute) {
+        return attribute.name + "_";
+    }
+
+    private static String methodName(String... words) {
+        String[] camelCase = new String[words.length];
+        camelCase[0] = words[0];
+        for (int i = 1; i < words.length; i++) {
+            camelCase[i] = capitalize(words[i]);
+        }
+        return String.join("", camelCase);
+    }
+
+    private static String capitalize(String word) {
+        return word.substring(0, 1).toUpperCase() + word.substring(1).toLowerCase();
+    }
+}

gradle-plugin-j2html/src/main/java/com/j2html/codegen/GeneratorUtil.java

@@ -0,0 +1,16 @@
+package com.j2html.codegen;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+public final class GeneratorUtil {
+
+    public static final void deleteAllFilesInDir(final Path dir) throws IOException {
+        for(final File file : dir.toFile().listFiles()){
+            System.out.println("deleting " + file.toPath());
+            Files.delete(file.toPath());
+        }
+    }
+}

gradle-plugin-j2html/src/main/java/com/j2html/codegen/Model.java

@@ -0,0 +1,171 @@
+package com.j2html.codegen;
+
+import java.util.*;
+
+import static com.j2html.codegen.Model.Metadata.ON_OFF;
+import static com.j2html.codegen.Model.Metadata.SELF_CLOSING;
+import static com.j2html.codegen.Model.Node.Type.*;
+
+public class Model implements Parser.Listener {
+
+    private Map<String, Node> elements;
+    private Map<String, Node> attributes;
+
+    public Model() {
+        elements = new LinkedHashMap<>();
+        attributes = new LinkedHashMap<>();
+    }
+
+    public Collection<Node> elements(){
+        return elements.values();
+    }
+
+    public Collection<Node> attributes(){
+        return attributes.values();
+    }
+
+    public Node addElement(String name) {
+        return add(ELEMENT, name, elements);
+    }
+
+    public Node addBooleanAttribute(String name) {
+        return add(BOOLEAN, name, attributes);
+    }
+
+    public Node addStringAttribute(String name) {
+        return add(STRING, name, attributes);
+    }
+
+    public Node element(String name) {
+        if (!elements.containsKey(name)) {
+            throw new NodeDoesNotExist(name);
+        }
+        return elements.get(name);
+    }
+
+    public Node attribute(String name) {
+        if (!attributes.containsKey(name)) {
+            throw new NodeDoesNotExist(name);
+        }
+        return attributes.get(name);
+    }
+
+    private Node add(Node.Type type, String name, Map<String, Node> nodes) {
+        if (nodes.containsKey(name)) {
+            throw new NodeAlreadyExists(name);
+        }
+
+        Node node = new Node(type, name);
+        nodes.put(name, node);
+        return node;
+    }
+
+    @Override
+    public void lineCommented(int line, String txt) {
+        // Ignore.
+    }
+
+    @Override
+    public void elementDefined(int line, String name) {
+        attempt(() -> addElement(name), line);
+    }
+
+    @Override
+    public void emptyElementDefined(int line, String name) {
+        attempt(() -> addElement(name).annotate(SELF_CLOSING), line);
+    }
+
+    @Override
+    public void booleanDefined(int line, String name) {
+        attempt(() -> addBooleanAttribute(name), line);
+    }
+
+    @Override
+    public void onOffDefined(int line, String name) {
+        attempt(() -> addBooleanAttribute(name).annotate(ON_OFF), line);
+    }
+
+    @Override
+    public void stringDefined(int line, String name) {
+        attempt(() -> addStringAttribute(name), line);
+    }
+
+    @Override
+    public void attributeDefined(int line, String element, String name) {
+        attempt(() -> element(element).addChild(attribute(name)), line);
+    }
+
+    @Override
+    public void invalidLine(int line, String txt) {
+        throw new RuntimeException("Invalid line [" + line + "]: " + txt);
+    }
+
+    @FunctionalInterface
+    private interface Unsafe {
+        void call() throws RuntimeException;
+    }
+
+    private void attempt(Unsafe operation, int line) {
+        try {
+            operation.call();
+        } catch (RuntimeException e) {
+            throw new InvalidModel(e, line);
+        }
+    }
+
+    public static class Node {
+        enum Type {
+            ELEMENT,
+            BOOLEAN,
+            STRING
+        }
+
+        public final Type type;
+        public final String name;
+        public final List<Metadata> metadata;
+        public final List<Node> children;
+
+        private Node(Type type, String name) {
+            this.type = type;
+            this.name = name;
+            this.metadata = new ArrayList<>();
+            this.children = new ArrayList<>();
+        }
+
+        public void annotate(Metadata meta) {
+            metadata.add(meta);
+        }
+
+        public void addChild(Node node) {
+            children.add(node);
+        }
+
+        public boolean is(Metadata annotation){
+            return metadata.contains(annotation);
+        }
+    }
+
+    public enum Metadata {
+        SELF_CLOSING,
+        ON_OFF,
+        OBSOLETE
+    }
+
+    public static class InvalidModel extends RuntimeException {
+        public InvalidModel(Exception cause, int line) {
+            super(cause.getMessage() + ".  At line " + line, cause);
+        }
+    }
+
+    public static class NodeAlreadyExists extends RuntimeException {
+        public NodeAlreadyExists(String name) {
+            super("Node already exists: " + name);
+        }
+    }
+
+    public static class NodeDoesNotExist extends RuntimeException {
+        public NodeDoesNotExist(String name) {
+            super("Node does not exist: " + name);
+        }
+    }
+}

gradle-plugin-j2html/src/main/java/com/j2html/codegen/Parser.java

@@ -0,0 +1,91 @@
+package com.j2html.codegen;
+
+import java.util.function.Consumer;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class Parser {
+
+    private static final Pattern EMPTY_LINE_PATTERN = Pattern.compile("\\s*");
+    private static final Pattern COMMENT_PATTERN = Pattern.compile("#.*");
+    private static final Pattern NODE_PATTERN = Pattern.compile("(?<type>ELEMENT|EMPTY-ELEMENT|BOOLEAN|ONOFF|STRING)\\[(?<name>\\S+)\\]");
+    private static final Pattern ATTRIBUTE_PATTERN = Pattern.compile("ATTRIBUTE\\[(?<element>\\S+):(?<name>\\S+)\\]");
+
+    public interface Listener {
+        void lineCommented(int line, String txt);
+
+        void elementDefined(int line, String name);
+
+        void emptyElementDefined(int line, String name);
+
+        void booleanDefined(int line, String name);
+
+        void onOffDefined(int line, String name);
+
+        void stringDefined(int line, String name);
+
+        void attributeDefined(int line, String element, String name);
+
+        void invalidLine(int line, String txt);
+    }
+
+    public static void parse(String txt, Listener listener) {
+        String[] lines = txt.split("[\r\n]+");
+
+        for (int i = 0; i < lines.length; i++) {
+            int number = i + 1;
+            String line = lines[i];
+
+            if (match(EMPTY_LINE_PATTERN, line)) continue;
+
+            if (match(COMMENT_PATTERN, line, matcher -> {
+                listener.lineCommented(number, line);
+            })) continue;
+
+            if (match(NODE_PATTERN, line, matcher -> {
+                String type = matcher.group("type");
+                String name = matcher.group("name");
+                switch (type) {
+                    case "ELEMENT":
+                        listener.elementDefined(number, name);
+                        break;
+                    case "EMPTY-ELEMENT":
+                        listener.emptyElementDefined(number, name);
+                        break;
+                    case "BOOLEAN":
+                        listener.booleanDefined(number, name);
+                        break;
+                    case "ONOFF":
+                        listener.onOffDefined(number, name);
+                        break;
+                    case "STRING":
+                        listener.stringDefined(number, name);
+                        break;
+                }
+            })) continue;
+
+            if (match(ATTRIBUTE_PATTERN, line, matcher -> {
+                listener.attributeDefined(
+                    number,
+                    matcher.group("element"),
+                    matcher.group("name")
+                );
+            })) continue;
+
+            listener.invalidLine(number, line);
+        }
+    }
+
+    private static boolean match(Pattern pattern, String txt) {
+        return pattern.matcher(txt).matches();
+    }
+
+    private static boolean match(Pattern pattern, String txt, Consumer<Matcher> onMatch) {
+        Matcher matcher = pattern.matcher(txt);
+        if (matcher.matches()) {
+            onMatch.accept(matcher);
+            return true;
+        }
+        return false;
+    }
+}

gradle-plugin-j2html/src/main/java/com/j2html/codegen/generators/AttributeInterfaceCodeGenerator.java

@@ -0,0 +1,185 @@
+package com.j2html.codegen.generators;
+
+import com.j2html.codegen.GeneratorUtil;
+import com.j2html.codegen.model.AttrD;
+import com.j2html.codegen.model.AttributesList;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Optional;
+
+public final class AttributeInterfaceCodeGenerator {
+
+    private static final String relPath = "tags/attributes/";
+
+    public static void generate(final Path absPath, final boolean delete) throws IOException {
+
+        //delete all files in the directory for fresh generation
+        final Path dir = Paths.get(absPath.toString(),relPath);
+        GeneratorUtil.deleteAllFilesInDir(dir);
+
+        for (final AttrD attr : AttributesList.attributesDescriptive()) {
+            final Path path = makePath(attr.attr, absPath);
+            final String interfaceName = interfaceNameFromAttribute(attr.attr)+"<T extends Tag<T>>";
+            /*
+            IFormAction<T extends Tag<T>> extends IInstance<T>
+
+            default T withFormAction(String formAction){
+                return self().attr("formaction", formAction);
+            }
+             */
+            final String interfaceStr = getInterfaceTemplate(
+                interfaceName,
+                Optional.of("IInstance<T>"),
+                Arrays.asList("j2html.tags.Tag","j2html.tags.IInstance"),
+                interfaceNameFromAttribute(attr.attr).substring(1),
+                attr
+            );
+
+            if (!delete) {
+                System.out.println("writing to "+path);
+                Files.write(path, interfaceStr.getBytes());
+            }
+        }
+
+    }
+
+    private static String getPackage(){
+        return "package j2html.tags.attributes;\n";
+    }
+
+    private static String makeReturnTypeAndMethodName(final String name){
+        return "default "+ "T "+name;
+    }
+
+    private static String getInterfaceTemplate(
+        final String interfaceName,
+        final Optional<String> optExtends,
+        final List<String> imports,
+        final String interfaceNameSimple,
+        final AttrD attrD
+    ){
+
+        final StringBuilder sb = new StringBuilder();
+
+        sb.append(getPackage());
+        sb.append("\n");
+
+        for(String importName : imports){
+            sb.append("import ").append(importName).append(";\n");
+        }
+        sb.append("\n");
+        sb.append("public interface ")
+            .append(interfaceName);
+
+        optExtends.ifPresent(ext -> sb.append(" extends ").append(ext).append(" "));
+
+        sb.append(" {\n");
+
+        //interface contents
+        /*
+        IFormAction<T extends Tag> extends IInstance<T>
+
+        default T withFormAction(String formAction){
+            return self().attr("formaction", formAction);
+        }
+         */
+        //IMPORTANT: '_' added as suffix to mitigate problems
+        //where attributes are java keywords. Just to make it consistent and avoid special cases.
+        final String attrName = interfaceNameSimple.toLowerCase();
+        final String paramName = attrName+"_";
+
+        //depending on if the attribute has an argument or not,
+        //generate methods according to the convention in Tag.java
+        // arg -> with$ATTR(arg), withCond$ATTR(condition, arg)
+        // no arg -> is$ATTR(), withCond$ATTR(condition)
+
+        //append the 'with$ATTR' method
+        writeAttributeMethod(interfaceNameSimple, attrD, sb, attrName, paramName);
+        writeAttributeMethodCond(interfaceNameSimple, attrD, sb, attrName, paramName);
+
+        sb.append("}\n");
+
+        return sb.toString();
+    }
+
+    private static void addAttributeNoArg(final StringBuilder sb, final String attrName){
+        //generate the code to add an attribute without an argument
+
+        //there are some special attributes
+        //which do take an argument, but where the argument
+        //is boolean (meaning on/off, yes/no and the like)
+        sb.append("self().attr(\"");
+        if (attrName.equals("autocomplete")){
+            sb.append(attrName).append("\",\"on\"");
+        } else {
+            sb.append(attrName).append("\"");
+        }
+        sb.append(");\n");
+    }
+
+    private static void writeAttributeMethodCond(String interfaceNameSimple, AttrD attrD, StringBuilder sb, String attrName, String paramName) {
+
+        sb.append(makeReturnTypeAndMethodName("withCond"+interfaceNameSimple));
+
+        if(attrD.hasArgument){
+            //add a variant where you can specify the argument
+
+            sb.append("(final boolean enable, final String ").append(paramName).append(") {");
+
+                sb.append("if (enable){\n");
+                    sb.append("self().attr(\"").append(attrName).append("\", ").append(paramName).append(");\n");
+                sb.append("}\n");
+
+                sb.append("return self();\n");
+        }else{
+            //add a variant where you can toggle the attribute
+
+            sb.append("(final boolean enable) {");
+                sb.append("if (enable){\n");
+                    addAttributeNoArg(sb, attrName);
+                sb.append("}\n");
+                sb.append("return self();\n");
+        }
+        sb.append("}\n");
+    }
+
+    private static void writeAttributeMethod(String interfaceNameSimple, AttrD attrD, StringBuilder sb, String attrName, String paramName) {
+
+        sb.append(makeReturnTypeAndMethodName(
+            ((attrD.hasArgument)?"with":"is")+interfaceNameSimple)
+        );
+
+        if(attrD.hasArgument){
+            //add a variant where you can specify the argument
+
+            sb.append("(final String ").append(paramName).append(") {")
+
+                .append("return self().attr(\"").append(attrName).append("\", ").append(paramName).append(");\n");
+        }else{
+            //add a variant where you can toggle the attribute
+
+            sb.append("() {");
+
+                addAttributeNoArg(sb, attrName);
+
+                sb.append("return self();\n");
+        }
+        sb.append("}\n");
+    }
+
+    public static String interfaceNameFromAttribute(String attribute){
+        String res = attribute.substring(0,1).toUpperCase()+attribute.substring(1);
+        return "I" + res;
+    }
+
+    private static Path makePath(String tagLowerCase, final Path absPath){
+        final String filename = interfaceNameFromAttribute(tagLowerCase)+".java";
+        return Paths.get(absPath.toString(),relPath,filename);
+    }
+
+}

gradle-plugin-j2html/src/main/java/com/j2html/codegen/generators/SpecializedTagClassCodeGenerator.java

@@ -0,0 +1,166 @@
+package com.j2html.codegen.generators;
+
+
+import com.j2html.codegen.GeneratorUtil;
+import com.j2html.codegen.model.AttributesList;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Optional;
+import java.util.stream.Collectors;
+
+import static com.j2html.codegen.generators.TagCreatorCodeGenerator.containerTags;
+import static com.j2html.codegen.generators.TagCreatorCodeGenerator.emptyTags;
+
+public final class SpecializedTagClassCodeGenerator {
+
+    private static final String relPath = "tags/specialized";
+
+    public static void generate(final Path absPath, final boolean delete) throws IOException {
+
+        //delete all files in the directory for fresh generation
+        final Path dir = Paths.get(absPath.toString(),relPath);
+        GeneratorUtil.deleteAllFilesInDir(dir);
+
+        //the delete argument serves to give the possibility
+        //to delete the classes that were written before
+        System.out.println("// EmptyTags, generated in " + SpecializedTagClassCodeGenerator.class);
+
+        for (final String tag : emptyTags()) {
+            final String className = classNameFromTag(tag);
+            final Path path = makePath(absPath,tag);
+
+            final List<String> interfaceNames = getInterfaceNamesForTag(tag);
+
+            final String classString =
+              getClassTemplate(
+                  className,
+                  Optional.of("EmptyTag<"+className+">"),
+                  Arrays.asList(
+                      "j2html.tags.EmptyTag",
+                      "j2html.tags.attributes.*"
+                      ),
+                  tag,
+                  interfaceNames
+              );
+
+            /*
+            public InputTag() {
+                super("input");
+            }
+            */
+
+            if(!delete){
+                System.out.println("writing to "+path);
+                Files.write(path, classString.getBytes());
+            }
+        }
+
+        System.out.println("// ContainerTags, generated in " + SpecializedTagClassCodeGenerator.class);
+
+        for (final String tag : containerTags()) {
+            final Path path = makePath(absPath, tag);
+            final String className = classNameFromTag(tag);
+
+            final List<String> interfaceNames = getInterfaceNamesForTag(tag);
+
+            final String classString =
+                getClassTemplate(
+                    className,
+                    Optional.of("ContainerTag<"+className+">"),
+                    Arrays.asList(
+                        "j2html.tags.ContainerTag",
+                        "j2html.tags.attributes.*"
+                    ),
+                    tag,
+                    interfaceNames
+                );
+
+            if(delete){
+                if(Files.exists(path)) {
+                    System.out.println("deleting " + path);
+                    Files.delete(path);
+                }
+            }else {
+                System.out.println("writing to "+path);
+                Files.write(path, classString.getBytes());
+            }
+        }
+    }
+    public static String classNameFromTag(String tageNameLowerCase){
+        String res = tageNameLowerCase.substring(0,1).toUpperCase()+tageNameLowerCase.substring(1);
+        return res + "Tag";
+    }
+
+    private static Path makePath(final Path absPath, String tagLowerCase){
+        final String filename = classNameFromTag(tagLowerCase)+".java";
+        return Paths.get(absPath.toString(),relPath,filename);
+    }
+
+    private static String getPackage(){
+        return "package j2html.tags.specialized;\n";
+    }
+
+    private static String getClassTemplate(
+        final String className,
+        final Optional<String> optExtends,
+        final List<String> imports,
+        final String tag,
+        final List<String> interfaces
+    ){
+
+        final StringBuilder sb = new StringBuilder();
+
+        sb.append(getPackage());
+        sb.append("\n");
+
+        for(String importName : imports){
+            sb.append("import ").append(importName).append(";\n");
+        }
+        sb.append("\n");
+        sb.append("public final class ")
+            .append(className)
+            .append(" ");
+
+        optExtends.ifPresent(ext -> sb.append("extends ").append(ext).append(" "));
+
+        //add the 'implements' clause
+        if(!interfaces.isEmpty()) {
+            sb.append("\n");
+            sb.append("implements ");
+
+            final List<String> genericInterfaceNames
+                = interfaces.stream().map(iName -> iName+"<"+className+">")
+                .collect(Collectors.toList());
+            sb.append(
+                String.join(",", genericInterfaceNames)
+            );
+        }
+
+        sb.append(" {\n");
+
+        //class contents
+        sb.append("public ")
+            .append(className)
+            .append("() {")
+            .append("super(\"").append(tag).append("\");")
+            .append("}\n");
+
+        sb.append("}\n");
+
+        return sb.toString();
+    }
+
+    private static List<String> getInterfaceNamesForTag(final String tagNameLowercase){
+        return AttributesList.getCustomAttributesForHtmlTag(tagNameLowercase)
+            .stream()
+            .map(
+                AttributeInterfaceCodeGenerator::interfaceNameFromAttribute
+            ).collect(Collectors.toList());
+    }
+
+}

gradle-plugin-j2html/src/main/java/com/j2html/codegen/generators/TagCreatorCodeGenerator.java

@@ -0,0 +1,189 @@
+package com.j2html.codegen.generators;
+
+import java.util.Arrays;
+import java.util.List;
+
+public final class TagCreatorCodeGenerator {
+
+    public static void print() {
+
+        System.out.println("// EmptyTags, generated in " + TagCreatorCodeGenerator.class);
+
+        for (String tag : emptyTags()) {
+            final String className = SpecializedTagClassCodeGenerator.classNameFromTag(tag);
+            final String publicstaticTypeMethod = "public static "+className+" "+tag+" ";
+            final String castReturn = " return ("+className+") ";
+            final String construct = " new "+className+"()";
+
+            String emptyA1 = publicstaticTypeMethod + "()";
+            String emptyA2 = "{ return "+construct+"; }";
+            // Attr shorthands
+            String emptyB1 = publicstaticTypeMethod + "(Attr.ShortForm shortAttr)";
+            String emptyB2 = "{ "+castReturn+" Attr.addTo("+construct+", shortAttr); }";
+            // Print
+            System.out.println(String.format("%-80s%1s", emptyA1, emptyA2));
+            System.out.println(String.format("%-80s%1s", emptyB1, emptyB2));
+            System.out.println();
+        }
+
+        System.out.println("// ContainerTags, generated in " + TagCreatorCodeGenerator.class);
+
+        for (String tag : containerTags()) {
+            final String className = SpecializedTagClassCodeGenerator.classNameFromTag(tag);
+            final String publicstaticTypeMethod = "public static "+className+" "+tag+" ";
+            final String castReturn = " return ("+className+") ";
+            final String construct = " new "+className+"()";
+
+            String containerA1 = publicstaticTypeMethod+ "()";
+            String containerA2 = "{ "+castReturn + construct + "; }";
+
+            String containerB1 = publicstaticTypeMethod + "(String text)";
+            String containerB2 = "{ "+castReturn + construct + ".withText(text); }";
+
+            String containerC1 = publicstaticTypeMethod + "(DomContent... dc)";
+            String containerC2 = "{ "+castReturn + construct+".with(dc); }";
+            // Attr shorthands
+            String containerD1 = publicstaticTypeMethod + "(Attr.ShortForm shortAttr)";
+            String containerD2 = "{ "+castReturn+" Attr.addTo("+construct+", shortAttr); }";
+
+            String containerE1 = publicstaticTypeMethod + "(Attr.ShortForm shortAttr, String text)";
+            String containerE2 = "{ "+castReturn+" Attr.addTo("+construct+".withText(text), shortAttr); }";
+
+            String containerF1 = publicstaticTypeMethod + "(Attr.ShortForm shortAttr, DomContent... dc)";
+            String containerF2 = "{ "+castReturn+" Attr.addTo("+construct+".with(dc), shortAttr); }";
+            // Print
+            System.out.println(String.format("%-80s%1s", containerA1, containerA2));
+            System.out.println(String.format("%-80s%1s", containerB1, containerB2));
+            System.out.println(String.format("%-80s%1s", containerC1, containerC2));
+            System.out.println(String.format("%-80s%1s", containerD1, containerD2));
+            System.out.println(String.format("%-80s%1s", containerE1, containerE2));
+            System.out.println(String.format("%-80s%1s", containerF1, containerF2));
+            System.out.println();
+        }
+    }
+
+    //  This is a method that contains all ContainerTags, there is nothing below it
+    public static List<String> emptyTags() {
+        return Arrays.asList(
+            "area",
+            "base",
+            "br",
+            "col",
+            //"!DOCTYPE html",
+            "embed",
+            "hr",
+            "img",
+            "input",
+            "keygen",
+            "link",
+            "meta",
+            "param",
+            "source",
+            "track",
+            "wbr"
+        );
+    }
+
+    public static List<String> containerTags() {
+        return Arrays.asList(
+            "a",
+            "abbr",
+            "address",
+            "article",
+            "aside",
+            "audio",
+            "b",
+            "bdi",
+            "bdo",
+            "blockquote",
+            "body",
+            "button",
+            "canvas",
+            "caption",
+            "cite",
+            "code",
+            "colgroup",
+            "data",
+            "datalist",
+            "dd",
+            "del",
+            "details",
+            "dfn",
+            "dialog",
+            "div",
+            "dl",
+            "dt",
+            "em",
+            "fieldset",
+            "figcaption",
+            "figure",
+            "footer",
+            "form",
+            "h1",
+            "h2",
+            "h3",
+            "h4",
+            "h5",
+            "h6",
+            "head",
+            "header",
+            "html",
+            "i",
+            "iframe",
+            "ins",
+            "kbd",
+            "label",
+            "legend",
+            "li",
+            "main",
+            "map",
+            "mark",
+            "menu",
+            "menuitem",
+            "meter",
+            "nav",
+            "noscript",
+            "object",
+            "ol",
+            "optgroup",
+            "option",
+            "output",
+            "p",
+            "picture",
+            "pre",
+            "progress",
+            "q",
+            "rp",
+            "rt",
+            "ruby",
+            "s",
+            "samp",
+            "script",
+            "section",
+            "select",
+            "slot",
+            "small",
+            "span",
+            "strong",
+            "style",
+            "sub",
+            "summary",
+            "sup",
+            "table",
+            "tbody",
+            "td",
+            "template",
+            "textarea",
+            "tfoot",
+            "th",
+            "thead",
+            "time",
+            "title",
+            "tr",
+            "u",
+            "ul",
+            "var",
+            "video"
+        );
+    }
+}

gradle-plugin-j2html/src/main/java/com/j2html/codegen/generators/WattsiGenerator.java

@@ -0,0 +1,94 @@
+package com.j2html.codegen.generators;
+
+import com.j2html.codegen.wattsi.AttributeDefinition;
+import com.j2html.codegen.wattsi.ElementDefinition;
+import com.j2html.codegen.wattsi.WattsiSource;
+import com.squareup.javapoet.ClassName;
+import com.squareup.javapoet.MethodSpec;
+import com.squareup.javapoet.TypeSpec;
+import org.jsoup.Jsoup;
+import org.jsoup.nodes.Document;
+
+import javax.lang.model.element.Modifier;
+import java.io.IOException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.List;
+
+public class WattsiGenerator {
+
+    public static void main(String... args) throws IOException {
+        Path source = Paths.get(args[0]);
+        Document doc = Jsoup.parse(source.toFile(), "UTF-8", "https://html.spec.whatwg.org/");
+        WattsiSource wattsi = new WattsiSource(doc);
+
+        List<ElementDefinition> elements = wattsi.elementDefinitions();
+        List<AttributeDefinition> attributes = wattsi.attributeDefinitions();
+
+//        for (ElementDefinition element : elements) {
+//            System.out.println((element.isObsolete() ? "!" : "") + element.name());
+//            for (AttributeDefinition attribute : attributes) {
+//                if (attribute.appliesTo(element)) {
+//                    System.out.println("  " + (attribute.isObsolete() ? "!" : "") + attribute.name());
+//                }
+//            }
+//            System.out.println();
+//        }
+
+        for (ElementDefinition element : elements) {
+            ClassName className = ClassName.get(
+                "com.j2html",
+                capitalize(element.name()) + "Tag"
+            );
+
+            TypeSpec.Builder type = TypeSpec.classBuilder(className)
+                .addModifiers(Modifier.PUBLIC);
+
+            if (element.isObsolete()) {
+                type.addAnnotation(Deprecated.class);
+            }
+
+            for (AttributeDefinition attribute : attributes) {
+                if (attribute.appliesTo(element)) {
+                    String name = methodName("with", attribute.name().split("-"));
+                    MethodSpec.Builder setter = MethodSpec.methodBuilder(name)
+                        .addModifiers(Modifier.PUBLIC)
+                        .returns(className)
+                        .addStatement("return this");
+
+                    if(attribute.isObsolete()){
+                        setter.addAnnotation(Deprecated.class);
+                    }
+
+                    type.addMethod(setter.build());
+                }
+            }
+
+            System.out.println(type.build().toString());
+        }
+
+//        System.out.println(doc.select("dfn"));
+    }
+
+    private static String methodName(String prefix, String... words){
+        String[] tmp = new String[words.length + 1];
+        tmp[0] = prefix;
+        for(int i = 0; i < words.length; i++){
+            tmp[i+1] = words[i];
+        }
+        return methodName(tmp);
+    }
+
+    private static String methodName(String... words){
+        String[] camelCase = new String[words.length];
+        camelCase[0] = words[0];
+        for(int i = 1; i < words.length; i++){
+            camelCase[i] = capitalize(words[i]);
+        }
+        return String.join("", camelCase);
+    }
+
+    private static String capitalize(String word){
+        return word.substring(0,1).toUpperCase() + word.substring(1).toLowerCase();
+    }
+}

gradle-plugin-j2html/src/main/java/com/j2html/codegen/model/AttrD.java

@@ -0,0 +1,24 @@
+package com.j2html.codegen.model;
+
+public final class AttrD {
+    //attribute descriptor
+
+    public final String attr;
+
+    public final boolean hasArgument;
+
+    //the html tags that this attribute can be used on
+    public final String[] tags;
+
+    public AttrD(final String attr, boolean hasArgument){
+        this.attr = attr;
+        this.hasArgument = hasArgument;
+        this.tags = new String[]{};
+    }
+
+    public AttrD(final String attr, boolean hasArgument, final String... tags) {
+        this.attr = attr;
+        this.hasArgument = hasArgument;
+        this.tags = tags;
+    }
+}

gradle-plugin-j2html/src/main/java/com/j2html/codegen/model/AttributesList.java

@@ -0,0 +1,182 @@
+package com.j2html.codegen.model;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public final class AttributesList {
+
+    //https://www.w3schools.com/tags/ref_attributes.asp
+
+    public static List<String> getCustomAttributesForHtmlTag(final String tagLowercase){
+
+        final List<String> attrs = new ArrayList<>();
+        for(AttrD attrD : attributesDescriptive()){
+            if(
+                Arrays.asList(attrD.tags).contains(tagLowercase)
+            ){
+                attrs.add(attrD.attr);
+            }
+        }
+        return attrs;
+    }
+
+    public static List<AttrD> attributesDescriptive() {
+        return Arrays.asList(
+            new AttrD("accept", true, "input"),
+            //new AttrD("accept-charset","form"), //contains dashes, TODO
+            //new AttrD("accesskey"), //global attribute
+            new AttrD("action", true, "form"),
+            //"align", not supported in HTML5
+            new AttrD("alt", true, "area","img","input"),
+            new AttrD("async", false, "script"),
+            new AttrD("autocomplete", false, "form","input"),
+            new AttrD("autofocus", false, "button","input","select","textarea"),
+            new AttrD("autoplay", false, "audio","video"),
+            //"bgcolor", not supported in HTMTL5
+            //"border", not supported in HTML5
+            new AttrD("charset", true, "meta","script"),
+            new AttrD("checked", false, "input"),
+            new AttrD("cite", true, "blockquote","del","ins","q"),
+            //"class" already implemented in Tag.java // global attribute
+            new AttrD("cols", true, "textarea"),
+            new AttrD("colspan", true, "td","th"),
+            new AttrD("content", true, "meta"),
+            //"contenteditable" global attribute, should be in Tag.java
+            new AttrD("controls", false, "audio","video"),
+            new AttrD("coords", true, "area"),
+            new AttrD("data", true, "object"),
+            new AttrD("datetime", true, "del","ins","time"),
+            new AttrD("default", false, "track"),
+            new AttrD("defer", false, "script"),
+            //new AttrD("dir"), //global attribute
+            new AttrD("dirname", true, "input","textarea"),
+            new AttrD("disabled",false, "button","fieldset","input","optgroup","option","select","textarea"),
+            new AttrD("download",false, "a","area"),
+            //new AttrD("draggable") global attribute, should be in Tag.java
+            new AttrD("enctype", true, "form"),
+            new AttrD("for", true, "label","output"),
+            new AttrD("form", true, "button","fieldset","input","label","meter","object","output","select","textarea"),
+            new AttrD("formaction", true, "button","input"),
+            new AttrD("headers", true, "td","th"),
+            new AttrD("height", true, "canvas","embed","iframe","img","input","object","video"),
+            //new AttrD("hidden"), global attribute
+            new AttrD("high", true, "meter"),
+            new AttrD("href", true, "a","area","base","link"),
+            new AttrD("hreflang", true, "a","area","link"),
+            //"http-equiv", //TODO: '-' is problematic in code generation
+            //"id" global attribute, should be in Tag.java
+            new AttrD("ismap", false, "img"),
+            new AttrD("kind", true, "track"),
+            new AttrD("label", true, "track","option","optgroup"),
+            //"lang" global attribute, should be in Tag.java
+            new AttrD("list", true, "input"),
+            new AttrD("loop", false, "audio","video"),
+            new AttrD("low", true, "meter"),
+            new AttrD("max", true, "input","meter","progress"),
+            new AttrD("maxlength", true, "input","textarea"),
+            new AttrD("media", true, "a","area","link","source","style"),
+            new AttrD("method", true, "form"),
+            new AttrD("min", true, "input","meter"),
+            new AttrD("multiple", false, "input","select"),
+            new AttrD("muted", false, "video","audio"),
+            new AttrD("name", true, "button","fieldset","form","iframe","input","map","meta","object","output","param","select","slot","textarea"),
+            new AttrD("novalidate", false, "form"),
+            new AttrD("onabort", true, "audio","embed","img","object","video"),
+            new AttrD("onafterprint", true, "body"),
+            new AttrD("onbeforeprint", true, "body"),
+            new AttrD("onbeforeunload", true, "body"),
+            //new AttrD("onblur"), global attribute
+            new AttrD("oncanplay", true, "audio","embed","object","video"),
+            new AttrD("oncanplaythrough", true, "audio","video"),
+            /* a bunch of event attributes that are on all visible elements (so should be in Tag.java)
+            "onchange",
+            "onclick",
+            "oncontextmenu",
+            "oncopy",
+            */
+            new AttrD("oncuechange", true, "track"),
+            /*
+            "oncut",
+            ...
+            "ondrop",
+             */
+            new AttrD("ondurationchange", true, "audio","video"),
+            new AttrD("onemptied", true, "audio","video"),
+            new AttrD("onended", true, "audio","video"),
+            new AttrD("onerror", true, "audio","body","embed","img","object","script","style","video"),
+            //new AttrD("onfocus"),// global attribute
+            new AttrD("onhashchange", true, "body"),
+            // ... a bunch of event attributes visible on all elements
+            new AttrD("onload", true, "body","iframe","img","input","link","script","style"),
+            new AttrD("onloadeddata", true, "audio","video"),
+            new AttrD("onloadedmetadata", true, "audio","video"),
+            new AttrD("onloadstart", true, "audio","video"),
+            // ... a bunch of event attributes visible on all elements
+            new AttrD("onoffline", true, "body"),
+            new AttrD("ononline", true, "body"),
+            new AttrD("onpagehide", true, "body"),
+            new AttrD("onpageshow", true, "body"),
+            //new AttrD("onpaste"),// global attribute
+            new AttrD("onpause", true, "audio","video"),
+            new AttrD("onplay", true, "audio","video"),
+            new AttrD("onplaying", true, "audio","video"),
+            new AttrD("onpopstate", true, "body"),
+            new AttrD("onprogress", true, "audio","video"),
+            new AttrD("onratechange", true, "audio","video"),
+            new AttrD("onreset", true, "form"),
+            new AttrD("onresize", true, "body"),
+            //new AttrD("onscroll"), //global attribute
+            new AttrD("onsearch", true, "input"),
+            new AttrD("onseeked", true, "audio","video"),
+            new AttrD("onseeking", true, "audio","video"),
+            //new AttrD("onselect"), //global attribute
+            new AttrD("onstalled", true, "audio","video"),
+            new AttrD("onstorage", true, "body"),
+            new AttrD("onsubmit", true, "form"),
+            new AttrD("onsuspend", true, "audio","video"),
+            new AttrD("ontimeupdate", true, "audio","video"),
+            new AttrD("ontoggle", true, "details"),
+            new AttrD("onunload", true, "body"),
+            new AttrD("onvolumechanged", true, "audio","video"),
+            new AttrD("onwaiting", true, "audio","video"),
+            //new AttrD("onwheel"), //global attribute
+            new AttrD("open", false, "details"),
+            new AttrD("optimum", true, "meter"),
+            new AttrD("pattern", true, "input"),
+            new AttrD("placeholder", true, "input","textarea"),
+            new AttrD("poster", true, "video"),
+            new AttrD("preload", true, "audio","video"),
+            new AttrD("readonly", false, "input","textarea"),
+            new AttrD("rel", true, "a","area","form","link"),
+            new AttrD("required", false, "input","select","textarea"),
+            new AttrD("reversed", false, "ol"),
+            new AttrD("rows", true, "textarea"),
+            new AttrD("rowspan", true, "td","th"),
+            new AttrD("sandbox", false, "iframe"),
+            new AttrD("scope", true, "th"),
+            new AttrD("selected", false, "option"),
+            new AttrD("shape", true, "area"),
+            new AttrD("size", true, "input","select"),
+            new AttrD("sizes", true, "img","link","source"),
+            new AttrD("span", true, "col","colgroup"),
+            //new AttrD("spellcheck"), //global attribute
+            new AttrD("src", true, "audio","embed","iframe","img","input","script","source","track","video"),
+            new AttrD("srcdoc", true, "iframe"),
+            new AttrD("srclang", true, "track"),
+            new AttrD("srcset", true, "img","source"),
+            new AttrD("start", true, "ol"),
+            new AttrD("step", true, "input"),
+            //new AttrD("style"), //global attribute
+            //new AttrD("tabindex"), //global attribute
+            new AttrD("target", true, "a","area","base","form"),
+            //new AttrD("title"), //global attribute
+            //new AttrD("translate"),// global attribute
+            new AttrD("type", true, "a","button","embed","input","link","menu","object","script","source","style"),
+            new AttrD("usemap", true, "img","object"),
+            new AttrD("value", true, "button","data","input","li","option","meter","progress","param"),
+            new AttrD("width", true, "canvas","embed","iframe","img","input","object","video"),
+            new AttrD("wrap", true, "textarea")
+        );
+    }
+}

gradle-plugin-j2html/src/main/java/com/j2html/codegen/wattsi/AttributeDefinition.java

@@ -0,0 +1,10 @@
+package com.j2html.codegen.wattsi;
+
+public interface AttributeDefinition {
+
+    String name();
+
+    boolean appliesTo(ElementDefinition element);
+
+    boolean isObsolete();
+}

gradle-plugin-j2html/src/main/java/com/j2html/codegen/wattsi/ElementDefinition.java

@@ -0,0 +1,11 @@
+package com.j2html.codegen.wattsi;
+
+public interface ElementDefinition {
+
+    String name();
+
+    boolean isSelfClosing();
+
+    boolean isObsolete();
+
+}

gradle-plugin-j2html/src/main/java/com/j2html/codegen/wattsi/WattsiSource.java

@@ -0,0 +1,209 @@
+package com.j2html.codegen.wattsi;
+
+import org.jsoup.nodes.Document;
+import org.jsoup.nodes.Element;
+import org.jsoup.nodes.Node;
+import org.jsoup.nodes.TextNode;
+import org.jsoup.select.Elements;
+
+import java.util.*;
+import java.util.stream.Collectors;
+
+import static java.util.stream.Collectors.toList;
+
+public class WattsiSource {
+
+    private final Document doc;
+
+    private final Set<Reference> obsolete = new HashSet<>();
+
+    public WattsiSource(Document doc) {
+        this.doc = doc;
+
+        // Find where obsolete elements are defined or referenced.
+        Elements obsoleteElements = doc.select("p:contains(Elements in the following list are entirely obsolete) + dl");
+
+        // Convert definitions into references to record obsolete elements.
+        obsoleteElements.select("dt > dfn[element]")
+            .stream()
+            .map(WattsiElement::new)
+            .map(WattsiElement::reference)
+            .forEach(obsolete::add);
+
+        // Extract references to record obsolete elements.
+        obsoleteElements.select("dt > code")
+            .stream()
+            .map(Element::childNodes)
+            .map(Reference::from)
+            .forEach(obsolete::add);
+
+        // Find where obsolete attributes are defined or referenced.
+        Elements obsoleteAttributes = doc.select("p:contains(The following attributes are obsolete) + dl");
+
+        // Convert definitions into references to record obsolete attributes.
+        obsoleteAttributes.select("dt > dfn[element-attr]").stream()
+            .map(WattsiAttribute::new)
+            .map(WattsiAttribute::reference)
+            .forEach(obsolete::add);
+
+//        System.out.println(obsoleteAttributes.select("dt"));
+
+//        obsoleteAttributes.select("dt > code").stream()
+//            .map(Element::childNodes)
+//            .map(Reference::from)
+//            .forEach(System.err::println);
+
+//        System.out.println(
+//            doc.select("dfn[obsolete]")
+//        );
+    }
+
+    public List<ElementDefinition> elementDefinitions() {
+        return doc.select("dfn[element]").stream()
+            .map(WattsiElement::new)
+            .collect(toList());
+    }
+
+    public List<AttributeDefinition> attributeDefinitions() {
+        return doc.select("dfn[element-attr]").stream()
+            .map(WattsiAttribute::new)
+            .collect(toList());
+    }
+
+    public class WattsiElement implements ElementDefinition {
+        private final Element dfn;
+
+        WattsiElement(Element dfn) {
+            if (!"dfn".equals(dfn.tagName())) {
+                throw new IllegalArgumentException("Element cannot be defined from: " + dfn);
+            }
+            if (!dfn.hasAttr("element")) {
+                throw new IllegalArgumentException("Does not define an element: " + dfn);
+            }
+            if (dfn.childrenSize() != 1) {
+                throw new IllegalArgumentException("Element cannot have multiple definitions: " + dfn);
+            }
+            this.dfn = dfn;
+        }
+
+        private Reference reference() {
+            return Reference.from(dfn.childNodes());
+        }
+
+        @Override
+        public String name() {
+            if (dfn.hasAttr("data-x")) {
+                return dfn.attr("data-x");
+            }
+
+            return Reference.from(dfn.childNodes()).key;
+        }
+
+        @Override
+        public boolean isSelfClosing() {
+            return false;
+        }
+
+        @Override
+        public boolean isObsolete() {
+            return obsolete.contains(reference());
+        }
+    }
+
+    public class WattsiAttribute implements AttributeDefinition {
+        private final Element dfn;
+
+        WattsiAttribute(Element dfn) {
+            if (!"dfn".equals(dfn.tagName())) {
+                throw new IllegalArgumentException("Attribute cannot be defined from: " + dfn);
+            }
+            if (!dfn.hasAttr("element-attr")) {
+                throw new IllegalArgumentException("Does not define an attribute: " + dfn);
+            }
+            if (dfn.childrenSize() != 1) {
+                throw new IllegalArgumentException("Attribute cannot have multiple definitions: " + dfn);
+            }
+
+            this.dfn = dfn;
+        }
+
+        private Reference reference() {
+            return Reference.from(dfn.childNodes());
+        }
+
+        @Override
+        public String name() {
+            return reference().text;
+        }
+
+        private List<String> targets() {
+            if (dfn.hasAttr("for")) {
+                return Arrays.asList(dfn.attr("for").trim().split(","));
+            }
+            return new ArrayList<>();
+        }
+
+        @Override
+        public boolean appliesTo(ElementDefinition element) {
+            return targets().contains(element.name());
+        }
+
+        @Override
+        public boolean isObsolete() {
+            return obsolete.contains(reference());
+        }
+    }
+
+    private static class Reference {
+        private final String key;
+        private final String text;
+
+        Reference(String key, String text) {
+            this.key = key;
+            this.text = text;
+        }
+
+        @Override
+        public String toString() {
+            return key + "[" + text + "]";
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o == null || getClass() != o.getClass()) return false;
+            Reference reference = (Reference) o;
+            return key.equals(reference.key);
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(key);
+        }
+
+        public static Reference from(List<Node> nodes) {
+            if (nodes.stream().allMatch(n -> n instanceof TextNode)) {
+                String txt = nodes.stream()
+                    .map(n -> (TextNode) n)
+                    .map(TextNode::text)
+                    .collect(Collectors.joining(" "));
+                return new Reference(txt, txt);
+            }
+
+            for (Node node : nodes) {
+                if (node instanceof Element) {
+                    Element element = (Element) node;
+                    if (element.is("code") || element.is("span")) {
+                        if (element.hasAttr("data-x")) {
+                            return new Reference(element.attr("data-x").toLowerCase(), element.text());
+                        } else {
+                            return new Reference(element.text().toLowerCase(), element.text());
+                        }
+                    }
+                }
+            }
+
+            return null;
+        }
+    }
+}

gradle-plugin-j2html/src/test/java/com/j2html/codegen/AppTest.java

@@ -0,0 +1,16 @@
+package com.j2html.codegen;
+
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+public class AppTest 
+{
+    @Test
+    public void shouldAnswerWithTrue()
+    {
+        //dummy, just to conform to the default mvn
+        //directory layout
+        assertTrue( true );
+    }
+}

gradle-plugin-j2html/src/test/java/com/j2html/codegen/CodeGeneratorComplianceTests.java

@@ -0,0 +1,77 @@
+package com.j2html.codegen;
+
+import com.j2html.codegen.generators.TagCreatorCodeGenerator;
+import com.j2html.codegen.wattsi.ElementDefinition;
+import com.j2html.codegen.wattsi.WattsiSource;
+import org.jsoup.Jsoup;
+import org.jsoup.nodes.Document;
+import org.junit.Before;
+import org.junit.Ignore;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+import static java.util.Collections.emptyList;
+import static java.util.stream.Collectors.toList;
+import static org.junit.Assert.assertEquals;
+
+public class CodeGeneratorComplianceTests {
+
+    private WattsiSource specification;
+
+    @Before
+    public void setUp() throws IOException {
+        Path source = Paths.get("src","test","resources","2022-01.wattsi");
+        Document doc = Jsoup.parse(source.toFile(), "UTF-8", "https://html.spec.whatwg.org/");
+        specification = new WattsiSource(doc);
+    }
+
+    private Set<String> generatedElements(){
+        Set<String> elements = new HashSet<>();
+        elements.addAll(TagCreatorCodeGenerator.emptyTags());
+        elements.addAll(TagCreatorCodeGenerator.containerTags());
+        return elements;
+    }
+
+    private Set<String> specifiedElements(WattsiSource source){
+        Set<String> elements = new HashSet<>();
+        for(ElementDefinition element : source.elementDefinitions()){
+            elements.add(element.name());
+        }
+        return elements;
+    }
+
+    @Test
+    @Ignore
+    // TODO restore this test once a policy has been determined for obsolete elements.
+    public void all_wattsi_elements_are_defined_in_the_code_generator() {
+        Set<String> generated = generatedElements();
+
+        List<String> undefined = specification.elementDefinitions().stream()
+            .filter(element -> !element.isObsolete())
+            .filter(element -> !generated.contains(element.name()))
+            .map(ElementDefinition::name)
+            .collect(toList());
+
+        assertEquals("HTML elements are missing", emptyList(), undefined);
+        // Currently missing (and mostly deprecated):
+        //   hgroup
+    }
+
+    @Test
+    public void only_wattsi_elements_are_defined_in_the_code_generator(){
+        Set<String> specified = specifiedElements(specification);
+
+        List<String> invalid = generatedElements().stream()
+            .filter(element -> !specified.contains(element))
+            .collect(toList());
+
+        assertEquals("HTML elements are invalid", emptyList(), invalid);
+    }
+
+}

gradle-plugin-j2html/src/test/java/com/j2html/codegen/ParserTest.java

@@ -0,0 +1,69 @@
+package com.j2html.codegen;
+
+import org.junit.Test;
+import org.mockito.InOrder;
+
+import java.util.function.Consumer;
+
+import static org.mockito.Mockito.*;
+
+public class ParserTest {
+
+    private void verifyParsing(String txt, Consumer<Parser.Listener> checks) {
+        Parser.Listener listener = mock(Parser.Listener.class);
+        Parser.parse(txt, listener);
+        checks.accept(listener);
+    }
+
+    @Test
+    public void an_empty_input_has_no_events() {
+        verifyParsing("", listener -> {
+            verifyNoInteractions(listener);
+        });
+    }
+
+    @Test
+    public void whitespace_has_no_events() {
+        verifyParsing("    \t\t\t\t", listener -> {
+            verifyNoInteractions(listener);
+        });
+    }
+
+    @Test
+    public void commented_lines_are_signaled() {
+        verifyParsing("#Comment 1.\n# Comment B?", listener -> {
+            InOrder order = inOrder(listener);
+            order.verify(listener).lineCommented(1, "#Comment 1.");
+            order.verify(listener).lineCommented(2, "# Comment B?");
+        });
+    }
+
+    @Test
+    public void node_definitions_are_signaled() {
+        verifyParsing("ELEMENT[a]\nEMPTY-ELEMENT[b]\nBOOLEAN[c]\nONOFF[d]\nSTRING[e]", listener -> {
+            InOrder order = inOrder(listener);
+            order.verify(listener).elementDefined(1, "a");
+            order.verify(listener).emptyElementDefined(2, "b");
+            order.verify(listener).booleanDefined(3, "c");
+            order.verify(listener).onOffDefined(4, "d");
+            order.verify(listener).stringDefined(5, "e");
+        });
+    }
+
+    @Test
+    public void attribute_definitions_are_signaled() {
+        verifyParsing("ATTRIBUTE[a:b]", listener -> {
+            InOrder order = inOrder(listener);
+            order.verify(listener).attributeDefined(1, "a", "b");
+        });
+    }
+
+    @Test
+    public void invalid_lines_are_signaled() {
+        verifyParsing("lol, I dunno!\nIt Broke...", listener -> {
+            InOrder order = inOrder(listener);
+            order.verify(listener).invalidLine(1, "lol, I dunno!");
+            order.verify(listener).invalidLine(2, "It Broke...");
+        });
+    }
+}

gradle-plugin-j2html/src/test/resources/html.model

@@ -0,0 +1,622 @@
+EMPTY-ELEMENT[area]
+EMPTY-ELEMENT[base]
+EMPTY-ELEMENT[br]
+EMPTY-ELEMENT[col]
+EMPTY-ELEMENT[embed]
+EMPTY-ELEMENT[hr]
+EMPTY-ELEMENT[img]
+EMPTY-ELEMENT[input]
+EMPTY-ELEMENT[keygen]
+EMPTY-ELEMENT[link]
+EMPTY-ELEMENT[meta]
+EMPTY-ELEMENT[param]
+EMPTY-ELEMENT[source]
+EMPTY-ELEMENT[track]
+EMPTY-ELEMENT[wbr]
+
+ELEMENT[a]
+ELEMENT[abbr]
+ELEMENT[address]
+ELEMENT[article]
+ELEMENT[aside]
+ELEMENT[audio]
+ELEMENT[b]
+ELEMENT[bdi]
+ELEMENT[bdo]
+ELEMENT[blockquote]
+ELEMENT[body]
+ELEMENT[button]
+ELEMENT[canvas]
+ELEMENT[caption]
+ELEMENT[cite]
+ELEMENT[code]
+ELEMENT[colgroup]
+ELEMENT[data]
+ELEMENT[datalist]
+ELEMENT[dd]
+ELEMENT[del]
+ELEMENT[details]
+ELEMENT[dfn]
+ELEMENT[dialog]
+ELEMENT[div]
+ELEMENT[dl]
+ELEMENT[dt]
+ELEMENT[em]
+ELEMENT[fieldset]
+ELEMENT[figcaption]
+ELEMENT[figure]
+ELEMENT[footer]
+ELEMENT[form]
+ELEMENT[h1]
+ELEMENT[h2]
+ELEMENT[h3]
+ELEMENT[h4]
+ELEMENT[h5]
+ELEMENT[h6]
+ELEMENT[head]
+ELEMENT[header]
+ELEMENT[html]
+ELEMENT[i]
+ELEMENT[iframe]
+ELEMENT[ins]
+ELEMENT[kbd]
+ELEMENT[label]
+ELEMENT[legend]
+ELEMENT[li]
+ELEMENT[main]
+ELEMENT[map]
+ELEMENT[mark]
+ELEMENT[menu]
+ELEMENT[menuitem]
+ELEMENT[meter]
+ELEMENT[nav]
+ELEMENT[noscript]
+ELEMENT[object]
+ELEMENT[ol]
+ELEMENT[optgroup]
+ELEMENT[option]
+ELEMENT[output]
+ELEMENT[p]
+ELEMENT[picture]
+ELEMENT[pre]
+ELEMENT[progress]
+ELEMENT[q]
+ELEMENT[rp]
+ELEMENT[rt]
+ELEMENT[ruby]
+ELEMENT[s]
+ELEMENT[samp]
+ELEMENT[script]
+ELEMENT[section]
+ELEMENT[select]
+ELEMENT[slot]
+ELEMENT[small]
+ELEMENT[span]
+ELEMENT[strong]
+ELEMENT[style]
+ELEMENT[sub]
+ELEMENT[summary]
+ELEMENT[sup]
+ELEMENT[table]
+ELEMENT[tbody]
+ELEMENT[td]
+ELEMENT[template]
+ELEMENT[textarea]
+ELEMENT[tfoot]
+ELEMENT[th]
+ELEMENT[thead]
+ELEMENT[time]
+ELEMENT[title]
+ELEMENT[tr]
+ELEMENT[u]
+ELEMENT[ul]
+ELEMENT[var]
+ELEMENT[video]
+
+STRING[accept]
+ATTRIBUTE[input:accept]
+
+STRING[action]
+ATTRIBUTE[form:action]
+
+STRING[alt]
+ATTRIBUTE[area:alt]
+ATTRIBUTE[img:alt]
+ATTRIBUTE[input:alt]
+
+BOOLEAN[async]
+ATTRIBUTE[script:async]
+
+ONOFF[autocomplete]
+ATTRIBUTE[form:autocomplete]
+ATTRIBUTE[input:autocomplete]
+
+BOOLEAN[autofocus]
+ATTRIBUTE[button:autofocus]
+ATTRIBUTE[input:autofocus]
+ATTRIBUTE[select:autofocus]
+ATTRIBUTE[textarea:autofocus]
+
+BOOLEAN[autoplay]
+ATTRIBUTE[audio:autoplay]
+ATTRIBUTE[video:autoplay]
+
+STRING[charset]
+ATTRIBUTE[meta:charset]
+ATTRIBUTE[script:charset]
+
+BOOLEAN[checked]
+ATTRIBUTE[input:checked]
+
+STRING[cite]
+ATTRIBUTE[blockquote:cite]
+ATTRIBUTE[del:cite]
+ATTRIBUTE[ins:cite]
+ATTRIBUTE[q:cite]
+
+STRING[cols]
+ATTRIBUTE[textarea:cols]
+
+STRING[colspan]
+ATTRIBUTE[td:colspan]
+ATTRIBUTE[th:colspan]
+
+STRING[content]
+ATTRIBUTE[meta:content]
+
+BOOLEAN[controls]
+ATTRIBUTE[audio:controls]
+ATTRIBUTE[video:controls]
+
+STRING[coords]
+ATTRIBUTE[area:coords]
+
+STRING[data]
+ATTRIBUTE[object:data]
+
+STRING[datetime]
+ATTRIBUTE[del:datetime]
+ATTRIBUTE[ins:datetime]
+ATTRIBUTE[time:datetime]
+
+BOOLEAN[default]
+ATTRIBUTE[track:default]
+
+BOOLEAN[defer]
+ATTRIBUTE[script:defer]
+
+STRING[dirname]
+ATTRIBUTE[input:dirname]
+ATTRIBUTE[textarea:dirname]
+
+BOOLEAN[disabled]
+ATTRIBUTE[button:disabled]
+ATTRIBUTE[fieldset:disabled]
+ATTRIBUTE[input:disabled]
+ATTRIBUTE[optgroup:disabled]
+ATTRIBUTE[option:disabled]
+ATTRIBUTE[select:disabled]
+ATTRIBUTE[textarea:disabled]
+
+BOOLEAN[download]
+ATTRIBUTE[a:download]
+ATTRIBUTE[area:download]
+
+STRING[enctype]
+ATTRIBUTE[form:enctype]
+
+STRING[for]
+ATTRIBUTE[label:for]
+ATTRIBUTE[output:for]
+
+STRING[form]
+ATTRIBUTE[button:form]
+ATTRIBUTE[fieldset:form]
+ATTRIBUTE[input:form]
+ATTRIBUTE[label:form]
+ATTRIBUTE[meter:form]
+ATTRIBUTE[object:form]
+ATTRIBUTE[output:form]
+ATTRIBUTE[select:form]
+ATTRIBUTE[textarea:form]
+
+STRING[formaction]
+ATTRIBUTE[button:formaction]
+ATTRIBUTE[input:formaction]
+
+STRING[headers]
+ATTRIBUTE[td:headers]
+ATTRIBUTE[th:headers]
+
+STRING[height]
+ATTRIBUTE[canvas:height]
+ATTRIBUTE[embed:height]
+ATTRIBUTE[iframe:height]
+ATTRIBUTE[img:height]
+ATTRIBUTE[input:height]
+ATTRIBUTE[object:height]
+ATTRIBUTE[video:height]
+
+STRING[high]
+ATTRIBUTE[meter:high]
+
+STRING[href]
+ATTRIBUTE[a:href]
+ATTRIBUTE[area:href]
+ATTRIBUTE[base:href]
+ATTRIBUTE[link:href]
+
+STRING[hreflang]
+ATTRIBUTE[a:hreflang]
+ATTRIBUTE[area:hreflang]
+ATTRIBUTE[link:hreflang]
+
+BOOLEAN[ismap]
+ATTRIBUTE[img:ismap]
+
+STRING[kind]
+ATTRIBUTE[track:kind]
+
+STRING[label]
+ATTRIBUTE[track:label]
+ATTRIBUTE[option:label]
+ATTRIBUTE[optgroup:label]
+
+STRING[list]
+ATTRIBUTE[input:list]
+
+BOOLEAN[loop]
+ATTRIBUTE[audio:loop]
+ATTRIBUTE[video:loop]
+
+STRING[low]
+ATTRIBUTE[meter:low]
+
+STRING[max]
+ATTRIBUTE[input:max]
+ATTRIBUTE[meter:max]
+ATTRIBUTE[progress:max]
+
+STRING[maxlength]
+ATTRIBUTE[input:maxlength]
+ATTRIBUTE[textarea:maxlength]
+
+STRING[media]
+ATTRIBUTE[a:media]
+ATTRIBUTE[area:media]
+ATTRIBUTE[link:media]
+ATTRIBUTE[source:media]
+ATTRIBUTE[style:media]
+
+STRING[method]
+ATTRIBUTE[form:method]
+
+STRING[min]
+ATTRIBUTE[input:min]
+ATTRIBUTE[meter:min]
+
+BOOLEAN[multiple]
+ATTRIBUTE[input:multiple]
+ATTRIBUTE[select:multiple]
+
+BOOLEAN[muted]
+ATTRIBUTE[video:muted]
+ATTRIBUTE[audio:muted]
+
+STRING[name]
+ATTRIBUTE[button:name]
+ATTRIBUTE[fieldset:name]
+ATTRIBUTE[form:name]
+ATTRIBUTE[iframe:name]
+ATTRIBUTE[input:name]
+ATTRIBUTE[map:name]
+ATTRIBUTE[meta:name]
+ATTRIBUTE[object:name]
+ATTRIBUTE[output:name]
+ATTRIBUTE[param:name]
+ATTRIBUTE[select:name]
+ATTRIBUTE[slot:name]
+ATTRIBUTE[textarea:name]
+
+BOOLEAN[novalidate]
+ATTRIBUTE[form:novalidate]
+
+STRING[onabort]
+ATTRIBUTE[audio:onabort]
+ATTRIBUTE[embed:onabort]
+ATTRIBUTE[img:onabort]
+ATTRIBUTE[object:onabort]
+ATTRIBUTE[video:onabort]
+
+STRING[onafterprint]
+ATTRIBUTE[body:onafterprint]
+
+STRING[onbeforeprint]
+ATTRIBUTE[body:onbeforeprint]
+
+STRING[onbeforeunload]
+ATTRIBUTE[body:onbeforeunload]
+
+STRING[oncanplay]
+ATTRIBUTE[audio:oncanplay]
+ATTRIBUTE[embed:oncanplay]
+ATTRIBUTE[object:oncanplay]
+ATTRIBUTE[video:oncanplay]
+
+STRING[oncanplaythrough]
+ATTRIBUTE[audio:oncanplaythrough]
+ATTRIBUTE[video:oncanplaythrough]
+
+STRING[oncuechange]
+ATTRIBUTE[track:oncuechange]
+
+STRING[ondurationchange]
+ATTRIBUTE[audio:ondurationchange]
+ATTRIBUTE[video:ondurationchange]
+
+STRING[onemptied]
+ATTRIBUTE[audio:onemptied]
+ATTRIBUTE[video:onemptied]
+
+STRING[onended]
+ATTRIBUTE[audio:onended]
+ATTRIBUTE[video:onended]
+
+STRING[onerror]
+ATTRIBUTE[audio:onerror]
+ATTRIBUTE[body:onerror]
+ATTRIBUTE[embed:onerror]
+ATTRIBUTE[img:onerror]
+ATTRIBUTE[object:onerror]
+ATTRIBUTE[script:onerror]
+ATTRIBUTE[style:onerror]
+ATTRIBUTE[video:onerror]
+
+STRING[onhashchange]
+ATTRIBUTE[body:onhashchange]
+
+STRING[onload]
+ATTRIBUTE[body:onload]
+ATTRIBUTE[iframe:onload]
+ATTRIBUTE[img:onload]
+ATTRIBUTE[input:onload]
+ATTRIBUTE[link:onload]
+ATTRIBUTE[script:onload]
+ATTRIBUTE[style:onload]
+
+STRING[onloadeddata]
+ATTRIBUTE[audio:onloadeddata]
+ATTRIBUTE[video:onloadeddata]
+
+STRING[onloadedmetadata]
+ATTRIBUTE[audio:onloadedmetadata]
+ATTRIBUTE[video:onloadedmetadata]
+
+STRING[onloadstart]
+ATTRIBUTE[audio:onloadstart]
+ATTRIBUTE[video:onloadstart]
+
+STRING[onoffline]
+ATTRIBUTE[body:onoffline]
+
+STRING[ononline]
+ATTRIBUTE[body:ononline]
+
+STRING[onpagehide]
+ATTRIBUTE[body:onpagehide]
+
+STRING[onpageshow]
+ATTRIBUTE[body:onpageshow]
+
+STRING[onpause]
+ATTRIBUTE[audio:onpause]
+ATTRIBUTE[video:onpause]
+
+STRING[onplay]
+ATTRIBUTE[audio:onplay]
+ATTRIBUTE[video:onplay]
+
+STRING[onplaying]
+ATTRIBUTE[audio:onplaying]
+ATTRIBUTE[video:onplaying]
+
+STRING[onpopstate]
+ATTRIBUTE[body:onpopstate]
+
+STRING[onprogress]
+ATTRIBUTE[audio:onprogress]
+ATTRIBUTE[video:onprogress]
+
+STRING[onratechange]
+ATTRIBUTE[audio:onratechange]
+ATTRIBUTE[video:onratechange]
+
+STRING[onreset]
+ATTRIBUTE[form:onreset]
+
+STRING[onresize]
+ATTRIBUTE[body:onresize]
+
+STRING[onsearch]
+ATTRIBUTE[input:onsearch]
+
+STRING[onseeked]
+ATTRIBUTE[audio:onseeked]
+ATTRIBUTE[video:onseeked]
+
+STRING[onseeking]
+ATTRIBUTE[audio:onseeking]
+ATTRIBUTE[video:onseeking]
+
+STRING[onstalled]
+ATTRIBUTE[audio:onstalled]
+ATTRIBUTE[video:onstalled]
+
+STRING[onstorage]
+ATTRIBUTE[body:onstorage]
+
+STRING[onsubmit]
+ATTRIBUTE[form:onsubmit]
+
+STRING[onsuspend]
+ATTRIBUTE[audio:onsuspend]
+ATTRIBUTE[video:onsuspend]
+
+STRING[ontimeupdate]
+ATTRIBUTE[audio:ontimeupdate]
+ATTRIBUTE[video:ontimeupdate]
+
+STRING[ontoggle]
+ATTRIBUTE[details:ontoggle]
+
+STRING[onunload]
+ATTRIBUTE[body:onunload]
+
+STRING[onvolumechanged]
+ATTRIBUTE[audio:onvolumechanged]
+ATTRIBUTE[video:onvolumechanged]
+
+STRING[onwaiting]
+ATTRIBUTE[audio:onwaiting]
+ATTRIBUTE[video:onwaiting]
+
+BOOLEAN[open]
+ATTRIBUTE[details:open]
+
+STRING[optimum]
+ATTRIBUTE[meter:optimum]
+
+STRING[pattern]
+ATTRIBUTE[input:pattern]
+
+STRING[placeholder]
+ATTRIBUTE[input:placeholder]
+ATTRIBUTE[textarea:placeholder]
+
+STRING[poster]
+ATTRIBUTE[video:poster]
+
+STRING[preload]
+ATTRIBUTE[audio:preload]
+ATTRIBUTE[video:preload]
+
+BOOLEAN[readonly]
+ATTRIBUTE[input:readonly]
+ATTRIBUTE[textarea:readonly]
+
+STRING[rel]
+ATTRIBUTE[a:rel]
+ATTRIBUTE[area:rel]
+ATTRIBUTE[form:rel]
+ATTRIBUTE[link:rel]
+
+BOOLEAN[required]
+ATTRIBUTE[input:required]
+ATTRIBUTE[select:required]
+ATTRIBUTE[textarea:required]
+
+BOOLEAN[reversed]
+ATTRIBUTE[ol:reversed]
+
+STRING[rows]
+ATTRIBUTE[textarea:rows]
+
+STRING[rowspan]
+ATTRIBUTE[td:rowspan]
+ATTRIBUTE[th:rowspan]
+
+BOOLEAN[sandbox]
+ATTRIBUTE[iframe:sandbox]
+
+STRING[scope]
+ATTRIBUTE[th:scope]
+
+BOOLEAN[selected]
+ATTRIBUTE[option:selected]
+
+STRING[shape]
+ATTRIBUTE[area:shape]
+
+STRING[size]
+ATTRIBUTE[input:size]
+ATTRIBUTE[select:size]
+
+STRING[sizes]
+ATTRIBUTE[img:sizes]
+ATTRIBUTE[link:sizes]
+ATTRIBUTE[source:sizes]
+
+STRING[span]
+ATTRIBUTE[col:span]
+ATTRIBUTE[colgroup:span]
+
+STRING[src]
+ATTRIBUTE[audio:src]
+ATTRIBUTE[embed:src]
+ATTRIBUTE[iframe:src]
+ATTRIBUTE[img:src]
+ATTRIBUTE[input:src]
+ATTRIBUTE[script:src]
+ATTRIBUTE[source:src]
+ATTRIBUTE[track:src]
+ATTRIBUTE[video:src]
+
+STRING[srcdoc]
+ATTRIBUTE[iframe:srcdoc]
+
+STRING[srclang]
+ATTRIBUTE[track:srclang]
+
+STRING[srcset]
+ATTRIBUTE[img:srcset]
+ATTRIBUTE[source:srcset]
+
+STRING[start]
+ATTRIBUTE[ol:start]
+
+STRING[step]
+ATTRIBUTE[input:step]
+
+STRING[target]
+ATTRIBUTE[a:target]
+ATTRIBUTE[area:target]
+ATTRIBUTE[base:target]
+ATTRIBUTE[form:target]
+
+STRING[type]
+ATTRIBUTE[a:type]
+ATTRIBUTE[button:type]
+ATTRIBUTE[embed:type]
+ATTRIBUTE[input:type]
+ATTRIBUTE[link:type]
+ATTRIBUTE[menu:type]
+ATTRIBUTE[object:type]
+ATTRIBUTE[script:type]
+ATTRIBUTE[source:type]
+ATTRIBUTE[style:type]
+
+STRING[usemap]
+ATTRIBUTE[img:usemap]
+ATTRIBUTE[object:usemap]
+
+STRING[value]
+ATTRIBUTE[button:value]
+ATTRIBUTE[data:value]
+ATTRIBUTE[input:value]
+ATTRIBUTE[li:value]
+ATTRIBUTE[option:value]
+ATTRIBUTE[meter:value]
+ATTRIBUTE[progress:value]
+ATTRIBUTE[param:value]
+
+STRING[width]
+ATTRIBUTE[canvas:width]
+ATTRIBUTE[embed:width]
+ATTRIBUTE[iframe:width]
+ATTRIBUTE[img:width]
+ATTRIBUTE[input:width]
+ATTRIBUTE[object:width]
+ATTRIBUTE[video:width]
+
+STRING[wrap]
+ATTRIBUTE[textarea:wrap]

gradle-plugin-jacc/gradle.properties

@@ -1,2 +1,2 @@
 name = gradle-plugin-jacc
-version = 3.0.2
+version = 3.1.0

gradle-plugin-java-conventions/LICENSE.txt

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
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+
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+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
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+      "Work" shall mean the work of authorship, whether in Source or
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+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
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+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
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+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
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+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

gradle-plugin-java-conventions/build.gradle

@@ -0,0 +1,32 @@
+plugins {
+    id 'java-gradle-plugin'
+    alias(libs.plugins.publish)
+}
+
+apply plugin: 'java-gradle-plugin'
+apply plugin: 'com.gradle.plugin-publish'
+
+apply from: rootProject.file('gradle/compile/groovy.gradle')
+apply from: rootProject.file('gradle/test/junit5.gradle')
+
+dependencies {
+    api gradleApi()
+    testImplementation gradleTestKit()
+}
+
+if (project.hasProperty('gradle.publish.key')) {
+    gradlePlugin {
+        website = 'https://xbib.org/joerg/gradle-plugins/src/branch/main/gradle-plugin-java-conventions'
+        vcsUrl = 'https://xbib.org/joerg/gradle-plugins'
+        plugins {
+            javaConventionsPlugin {
+                id = 'org.xbib.gradle.plugin.java.conventions'
+                implementationClass = 'org.xbib.gradle.plugin.java.conventions.JavaConventionsPlugin'
+                version = project.version
+                description = 'Gradle Java Conventions plugin'
+                displayName = 'Gradle Java Conventions plugin'
+                tags.set(['java', 'conventions'])
+            }
+        }
+    }
+}

gradle-plugin-java-conventions/gradle.properties

@@ -0,0 +1,2 @@
+name = gradle-plugin-java-conventions
+version = 1.0.0

gradle-plugin-java-conventions/src/main/groovy/org/xbib/gradle/plugin/java/conventions/JavaConventionsExtension.groovy

@@ -0,0 +1,11 @@
+package org.xbib.gradle.plugin.java.conventions
+
+class JavaConventionsExtension {
+
+    boolean runTestsParallel = false
+
+    int testThreads = Runtime.runtime.availableProcessors()
+
+    String jacocoVersion = "0.7.6.201602180812"
+
+}

gradle-plugin-java-conventions/src/main/groovy/org/xbib/gradle/plugin/java/conventions/JavaConventionsPlugin.groovy

@@ -0,0 +1,48 @@
+package org.xbib.gradle.plugin.java.conventions
+
+import org.gradle.api.Plugin
+import org.gradle.api.Project
+import org.gradle.api.tasks.compile.JavaCompile
+import org.gradle.api.tasks.javadoc.Javadoc
+import org.gradle.jvm.toolchain.JavaLanguageVersion
+
+class JavaConventionsPlugin implements Plugin<Project> {
+
+    JavaConventionsExtension extension
+
+    @Override
+    void apply(Project project) {
+        extension = project.extensions.create('javaConventions', JavaConventionsExtension)
+
+        project.apply plugin: 'java-library'
+
+        project.java {
+            toolchain {
+                languageVersion = JavaLanguageVersion.of(21)
+            }
+            modularity.inferModulePath.set(true)
+            withSourcesJar()
+            withJavadocJar()
+        }
+
+        project.jar {
+            manifest {
+                attributes('Implementation-Version': project.version)
+            }
+        }
+
+        project.tasks.withType(JavaCompile).configureEach {
+            options.fork = true
+            options.forkOptions.jvmArgs += ['-Duser.language=en','-Duser.country=US']
+            options.compilerArgs.add('-Xlint:-requires-transitive-automatic')
+            options.compilerArgs.add('-Xlint:deprecation')
+            options.encoding = 'UTF-8'
+        }
+
+        project.tasks.withType(Javadoc).configureEach {
+            options.addStringOption('Xdoclint:none', '-quiet')
+            options.encoding = 'UTF-8'
+        }
+
+    }
+}

gradle-plugin-jdeps/NOTICE.txt

@@ -0,0 +1,10 @@
+
+This work is based on
+
+https://github.com/kordamp/jdeps-gradle-plugin
+
+by Andres Almiray
+
+as of Feb 17, 2024
+
+License: Apache 2.0

gradle-plugin-jdeps/build.gradle

@@ -0,0 +1,32 @@
+plugins {
+    id 'java-gradle-plugin'
+    alias(libs.plugins.publish)
+}
+
+apply plugin: 'java-gradle-plugin'
+apply plugin: 'com.gradle.plugin-publish'
+
+apply from: rootProject.file('gradle/compile/groovy.gradle')
+apply from: rootProject.file('gradle/test/junit5.gradle')
+
+dependencies {
+    api gradleApi()
+    testImplementation gradleTestKit()
+}
+
+if (project.hasProperty('gradle.publish.key')) {
+    gradlePlugin {
+        website = 'https://xbib.org/joerg/gradle-plugins/src/branch/main/gradle-plugin-jdeps'
+        vcsUrl = 'https://xbib.org/joerg/gradle-plugins'
+        plugins {
+            jdepsPlugin {
+                id = 'org.xbib.gradle.plugin.jdeps'
+                implementationClass = 'org.xbib.gradle.plugin.jdeps.JDepsPlugin'
+                version = project.version
+                description = 'Gradle JDeps plugin'
+                displayName = 'Gradle JDeps plugin'
+                tags.set(['jdeps'])
+            }
+        }
+    }
+}

gradle-plugin-jdeps/src/main/groovy/org/xbib/gradle/plugin/jdeps/JDepsPlugin.groovy

@@ -0,0 +1,38 @@
+package org.xbib.gradle.plugin.jdeps
+
+import org.gradle.api.Action
+import org.gradle.api.Plugin
+import org.gradle.api.Project
+import org.gradle.api.Task
+import org.gradle.api.plugins.BasePlugin
+import org.gradle.api.plugins.JavaPlugin
+import org.gradle.api.plugins.JavaPluginConvention
+import org.gradle.api.tasks.TaskProvider
+import org.gradle.api.tasks.compile.JavaCompile
+
+class JDepsPlugin implements Plugin<Project> {
+
+    void apply(Project project) {
+        project.plugins.apply(JavaPlugin)
+        TaskProvider<JDepsReportTask> report = project.tasks.register('jdepsReport', JDepsReportTask,
+            new Action<JDepsReportTask>() {
+                @Override
+                void execute(JDepsReportTask t) {
+                    t.dependsOn(project.tasks.named('classes'))
+                    t.group = BasePlugin.BUILD_GROUP
+                    t.description = 'Generate a jdeps report on project classes and dependencies'
+                    t.compileJava = project.tasks.named(JavaPlugin.COMPILE_JAVA_TASK_NAME, JavaCompile)
+                    t.javaPluginConvention.set(project.convention.getPlugin(JavaPluginConvention))
+                    t.projectName.set(project.name)
+                    t.reportDir.convention(project.layout.buildDirectory.dir('reports/jdeps'))
+                    t.projectConfigurations = project.configurations
+                }
+            })
+        project.tasks.named('check').configure(new Action<Task>() {
+            @Override
+            void execute(Task t) {
+                t.dependsOn(report)
+            }
+        })
+    }
+}

gradle-plugin-jdeps/src/main/groovy/org/xbib/gradle/plugin/jdeps/JDepsReportTask.groovy

@@ -0,0 +1,674 @@
+package org.xbib.gradle.plugin.jdeps
+
+import org.gradle.api.DefaultTask
+import org.gradle.api.JavaVersion
+import org.gradle.api.artifacts.Configuration
+import org.gradle.api.artifacts.ConfigurationContainer
+import org.gradle.api.file.Directory
+import org.gradle.api.file.DirectoryProperty
+import org.gradle.api.model.ObjectFactory
+import org.gradle.api.plugins.JavaPluginConvention
+import org.gradle.api.provider.ListProperty
+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.InputDirectory
+import org.gradle.api.tasks.Internal
+import org.gradle.api.tasks.Optional
+import org.gradle.api.tasks.OutputDirectory
+import org.gradle.api.tasks.SourceSet
+import org.gradle.api.tasks.TaskAction
+import org.gradle.api.tasks.TaskProvider
+import org.gradle.api.tasks.compile.JavaCompile
+import org.gradle.api.tasks.options.Option
+import org.gradle.process.ExecOperations
+import org.xbib.gradle.plugin.jdeps.util.BooleanState
+import org.xbib.gradle.plugin.jdeps.util.DirectoryState
+import org.xbib.gradle.plugin.jdeps.util.ListState
+import org.xbib.gradle.plugin.jdeps.util.MapState
+import org.xbib.gradle.plugin.jdeps.util.SimpleBooleanState
+import org.xbib.gradle.plugin.jdeps.util.SimpleDirectoryState
+import org.xbib.gradle.plugin.jdeps.util.SimpleListState
+import org.xbib.gradle.plugin.jdeps.util.SimpleMapState
+import org.xbib.gradle.plugin.jdeps.util.SimpleStringState
+import org.xbib.gradle.plugin.jdeps.util.StringState
+
+import javax.inject.Inject
+import java.util.regex.Pattern
+
+class JDepsReportTask extends DefaultTask {
+
+    private static final Pattern WARNING = Pattern.compile("^(?:Warning:.*)|(?:.+->\\s([a-zA-Z\\.]+)\\s+JDK internal API.*)")
+
+    private static final Pattern ERROR = Pattern.compile("^(?:Error:.*)|Exception in thread.*")
+
+    @Inject
+    protected ExecOperations execOperations;
+
+    private final BooleanState listDeps
+
+    private final BooleanState listReducedDeps
+
+    private final BooleanState printModuleDeps
+
+    private final BooleanState verbose
+
+    private final BooleanState modular
+
+    private final BooleanState summary
+
+    private final BooleanState profile
+
+    private final BooleanState recursive
+
+    private final BooleanState jdkinternals
+
+    private final BooleanState consoleOutput
+
+    private final BooleanState apionly
+
+    private final BooleanState failOnWarning
+
+    private final BooleanState missingDeps
+
+    private final BooleanState ignoreMissingDeps
+
+    private final ListState pkgs
+
+    private final ListState requires
+
+    private final StringState include
+
+    private final StringState regex
+
+    private final StringState filter
+
+    private final ListState configurations
+
+    private final ListState classpaths
+
+    private final ListState sourceSets
+
+    private final StringState multiRelease
+
+    private final MapState multiReleaseJars
+
+    private final DirectoryState dotOutput
+
+    @OutputDirectory
+    final DirectoryProperty reportDir
+
+    @Internal
+    TaskProvider<JavaCompile> compileJava
+
+    @Internal
+    final Property<JavaPluginConvention> javaPluginConvention
+
+    @Internal
+    final Property<String> projectName
+
+    @Internal
+    ConfigurationContainer projectConfigurations
+
+    @Inject
+    JDepsReportTask(ObjectFactory objects) {
+        extensions.create('moduleOptions', ModuleOptions)
+        reportDir = objects.directoryProperty()
+        projectName = objects.property(String)
+        javaPluginConvention = objects.property(JavaPluginConvention)
+        listDeps = SimpleBooleanState.of(this, 'jdeps.list.deps', false)
+        listReducedDeps = SimpleBooleanState.of(this, 'jdeps.list.reduced.deps', false)
+        printModuleDeps = SimpleBooleanState.of(this, 'jdeps.print.module.deps', false)
+        verbose = SimpleBooleanState.of(this, 'jdeps.verbose', false)
+        modular = SimpleBooleanState.of(this, 'jdeps.modular', false)
+        summary = SimpleBooleanState.of(this, 'jdeps.summary', false)
+        profile = SimpleBooleanState.of(this, 'jdeps.profile', false)
+        recursive = SimpleBooleanState.of(this, 'jdeps.recursive', false)
+        jdkinternals = SimpleBooleanState.of(this, 'jdeps.jdkinternals', false)
+        consoleOutput = SimpleBooleanState.of(this, 'jdeps.console.output', true)
+        apionly = SimpleBooleanState.of(this, 'jdeps.apionly', false)
+        failOnWarning = SimpleBooleanState.of(this, 'jdeps.fail.on.warning', false)
+        missingDeps = SimpleBooleanState.of(this, 'jdeps.missing.deps', false)
+        ignoreMissingDeps = SimpleBooleanState.of(this, 'jdeps.ignore.missing.deps', false)
+        include = SimpleStringState.of(this, 'jdeps.include', "")
+        regex = SimpleStringState.of(this, 'jdeps.regex', "")
+        filter = SimpleStringState.of(this, 'jdeps.filter', "")
+        pkgs = SimpleListState.of(this, 'jdeps.package', [])
+        requires = SimpleListState.of(this, 'jdeps.require', [])
+        configurations = SimpleListState.of(this, 'jdeps.configurations', [])
+        classpaths = SimpleListState.of(this, 'jdeps.classpaths', [])
+        sourceSets = SimpleListState.of(this, 'jdeps.sourcesets', ['main'])
+        multiRelease = SimpleStringState.of(this, 'jdeps.multi.release', 'base')
+        multiReleaseJars = SimpleMapState.of(this, 'jdeps.multi.release.jars', [:])
+        dotOutput = SimpleDirectoryState.of(this, 'jdeps.dot.output', (Directory) null)
+    }
+
+    @Option(option = 'list-deps', description = 'Lists the module dependences')
+    void setListDeps(boolean value) { listDeps.property.set(value) }
+
+    @Option(option = 'list-reduced-deps', description = 'Lists the module dependences')
+    void setListReducedDeps(boolean value) { listReducedDeps.property.set(value) }
+
+    @Option(option = 'print-module-deps', description = 'Comma-separated list of module dependences')
+    void setPrintModuleDeps(boolean value) { printModuleDeps.property.set(value) }
+
+    @Option(option = 'verbose', description = 'Print all class level dependences')
+    void setVerbose(boolean value) { verbose.property.set(value) }
+
+    @Option(option = 'modular', description = 'Uses the module path instead of the classpath')
+    void setModular(boolean value) { modular.property.set(value) }
+
+    @Option(option = 'summary', description = 'Print dependency summary only')
+    void setSummary(boolean value) { summary.property.set(value) }
+
+    @Option(option = 'profile', description = 'Show profile containing a package')
+    void setProfile(boolean value) { profile.property.set(value) }
+
+    @Option(option = 'recursive', description = 'Recursively traverse all run-time dependences')
+    void setRecursive(boolean value) { recursive.property.set(value) }
+
+    @Option(option = 'jdkinternals', description = 'Finds class-level dependences on JDK internal APIs')
+    void setJdkinternals(boolean value) { jdkinternals.property.set(value) }
+
+    @Option(option = 'console-output', description = 'Print out report to console')
+    void setConsoleOutput(boolean value) { consoleOutput.property.set(value) }
+
+    @Option(option = 'apionly', description = 'Restrict analysis to APIs')
+    void setApionly(boolean value) { apionly.property.set(value) }
+
+    @Option(option = 'fail-on-warning', description = 'Fails the build if jdeps finds any warnings')
+    void setFailOnWarning(boolean value) { failOnWarning.property.set(value) }
+
+    @Option(option = 'missing-deps', description = 'Finds missing dependences')
+    void setMissingDeps(boolean value) { missingDeps.property.set(value) }
+
+    @Option(option = 'ignore-missing-deps', description = 'Ignore missing dependences')
+    void setIgnoreMissingDeps(boolean value) { ignoreMissingDeps.property.set(value) }
+
+    @Option(option = 'include', description = 'Restrict analysis to classes matching pattern')
+    void setInclude(String value) { include.property.set(value) }
+
+    @Option(option = 'regex', description = 'Finds dependences matching the given pattern')
+    void setRegex(String value) { regex.property.set(value) }
+
+    @Option(option = 'filter', description = 'Filter dependences matching the given pattern')
+    void setFilter(String value) { filter.property.set(value) }
+
+    @Option(option = 'package', description = 'Finds dependences matching the given package name. REPEATABLE')
+    void setPackage(String value) { pkgs.property.add(value) }
+
+    @Option(option = 'require', description = 'Finds dependences matching the given module name. REPEATABLE')
+    void setRequire(String value) { requires.property.add(value) }
+
+    @Option(option = 'configurations', description = 'Configurations to be analyzed')
+    void setConfigurations(String value) { configurations.property.set(value.split(',').toList()) }
+
+    @Option(option = 'classpaths', description = 'Classpaths to be analyzed')
+    void setClasspaths(String value) { classpaths.property.set(value.split(',').toList()) }
+
+    @Option(option = 'sourcesets', description = 'SourceSets to be analyzed')
+    void setSourceSets(String value) { sourceSets.property.set(value.split(',').toList()) }
+
+    @Option(option = 'multi-release', description = 'Set the multi-release level')
+    void setMultiRelease(String value) { multiRelease.property.set(value) }
+
+    @Option(option = 'dot-output', description = 'Destination directory for DOT file output')
+    void setDotOutput(String value) { dotOutput.property.set(new File(value)) }
+
+    @Internal
+    Property<Boolean> getListDeps() { listDeps.property }
+
+    @Input
+    Provider<Boolean> getResolvedListDeps() { listDeps.provider }
+
+    @Internal
+    Property<Boolean> getListReducedDeps() { listReducedDeps.property }
+
+    @Input
+    Provider<Boolean> getResolvedListReducedDeps() { listReducedDeps.provider }
+
+    @Internal
+    Property<Boolean> getPrintModuleDeps() { printModuleDeps.property }
+
+    @Input
+    Provider<Boolean> getResolvedPrintModuleDeps() { printModuleDeps.provider }
+
+    @Internal
+    Property<Boolean> getVerbose() { verbose.property }
+
+    @Input
+    Provider<Boolean> getResolvedVerbose() { verbose.provider }
+
+    @Internal
+    Property<Boolean> getModular() { modular.property }
+
+    @Input
+    Provider<Boolean> getResolvedModular() { modular.provider }
+
+    @Internal
+    Property<Boolean> getSummary() { summary.property }
+
+    @Input
+    Provider<Boolean> getResolvedSummary() { summary.provider }
+
+    @Internal
+    Property<Boolean> getProfile() { profile.property }
+
+    @Input
+    Provider<Boolean> getResolvedProfile() { profile.provider }
+
+    @Internal
+    Property<Boolean> getRecursive() { recursive.property }
+
+    @Input
+    Provider<Boolean> getResolvedRecursive() { recursive.provider }
+
+    @Internal
+    Property<Boolean> getJdkinternals() { jdkinternals.property }
+
+    @Input
+    Provider<Boolean> getResolvedJdkinternals() { jdkinternals.provider }
+
+    @Internal
+    Property<Boolean> getConsoleOutput() { consoleOutput.property }
+
+    @Input
+    Provider<Boolean> getResolvedConsoleOutput() { consoleOutput.provider }
+
+    @Internal
+    Property<Boolean> getApionly() { apionly.property }
+
+    @Input
+    Provider<Boolean> getResolvedApionly() { apionly.provider }
+
+    @Internal
+    Property<Boolean> getFailOnWarning() { failOnWarning.property }
+
+    @Input
+    Provider<Boolean> getResolvedFailOnWarning() { failOnWarning.provider }
+
+    @Internal
+    Property<Boolean> getMissingDeps() { missingDeps.property }
+
+    @Input
+    Provider<Boolean> getResolvedMissingDeps() { missingDeps.provider }
+
+    @Internal
+    Property<Boolean> getIgnoreMissingDeps() { ignoreMissingDeps.property }
+
+    @Input
+    Provider<Boolean> getResolvedIgnoreMissingDeps() { ignoreMissingDeps.provider }
+
+    @Internal
+    Property<String> getInclude() { include.property }
+
+    @Input
+    @Optional
+    Provider<String> getResolvedInclude() { include.provider }
+
+    @Internal
+    Property<String> getRegex() { regex.property }
+
+    @Input
+    @Optional
+    Provider<String> getResolvedRegex() { regex.provider }
+
+    @Internal
+    Property<String> getFilter() { filter.property }
+
+    @Input
+    @Optional
+    Provider<String> getResolvedFilter() { filter.provider }
+
+    @Internal
+    ListProperty<String> getPackages() { pkgs.property }
+
+    @Input
+    @Optional
+    Provider<List<String>> getResolvedPackages() { pkgs.provider }
+
+    @Internal
+    ListProperty<String> getRequires() { requires.property }
+
+    @Input
+    @Optional
+    Provider<List<String>> getResolvedRequires() { requires.provider }
+
+    @Internal
+    ListProperty<String> getConfigurations() { configurations.property }
+
+    @Input
+    @Optional
+    Provider<List<String>> getResolvedConfigurations() { configurations.provider }
+
+    @Internal
+    ListProperty<String> getClasspaths() { classpaths.property }
+
+    @Input
+    @Optional
+    Provider<List<String>> getResolvedClasspaths() { classpaths.provider }
+
+    @Internal
+    ListProperty<String> getSourceSets() { sourceSets.property }
+
+    @Input
+    @Optional
+    Provider<List<String>> getResolvedSourceSets() { sourceSets.provider }
+
+    @Internal
+    Property<String> getMultiRelease() { multiRelease.property }
+
+    @Input
+    Provider<String> getResolvedMultiRelease() { multiRelease.provider }
+
+    @Internal
+    MapProperty<String, String> getMultiReleaseJars() { multiReleaseJars.property }
+
+    @Input
+    @Optional
+    Provider<Map<String, String>> getResolvedMultiReleaseJars() { multiReleaseJars.provider }
+
+    @Internal
+    DirectoryProperty getDotOutput() { dotOutput.property }
+
+    @InputDirectory
+    @Optional
+    Provider<Directory> getResolvedDotOutput() { dotOutput.provider }
+
+    @TaskAction
+    void evaluate() {
+        ModuleOptions moduleOptions = extensions.getByType(ModuleOptions)
+        String classpath = compileJava.get().classpath.asPath
+        List<String> compilerArgs = compileJava.get().options.compilerArgs
+        List<String> commandOutput = []
+        int explicitCommand = 0
+        if (resolvedListDeps.get()) {
+            explicitCommand++
+        }
+        if (resolvedListReducedDeps.get()) {
+            explicitCommand++
+        }
+        if (resolvedPrintModuleDeps.get()) {
+            explicitCommand++
+        }
+        if (explicitCommand > 1) {
+            throw new IllegalArgumentException("--list-deps, --list-reduced-deps, --print-module-deps are mutually exclusive")
+        }
+
+        final List<String> baseCmd = ['jdeps']
+        if (resolvedSummary.get()) {
+            if (resolvedMissingDeps.get()) {
+                throw new IllegalArgumentException("-s, --missing-deps are mutually exclusive")
+            }
+            baseCmd << '-s'
+        }
+        if (resolvedVerbose.get()) {
+            baseCmd << '-v'
+        }
+        if (resolvedProfile.get()) {
+            baseCmd << '-P'
+        }
+        if (resolvedRecursive.get()) {
+            baseCmd << '-R'
+        }
+        if (resolvedJdkinternals.get()) {
+            baseCmd << '-jdkinternals'
+        }
+        if (resolvedApionly.get()) {
+            baseCmd << '-apionly'
+        }
+        if (getResolvedDotOutput().present) {
+            baseCmd << '-dotoutput'
+            baseCmd << resolvedDotOutput.get().asFile.absolutePath
+            resolvedDotOutput.get().asFile.mkdirs()
+        }
+        if (resolvedIgnoreMissingDeps.get()) {
+            baseCmd << '--ignore-missing-deps'
+        }
+        if (JavaVersion.current().java9Compatible) {
+            if (resolvedMultiRelease.present) {
+                baseCmd << '--multi-release'
+                baseCmd << resolvedMultiRelease.get()
+            }
+            if (resolvedModular.get()) {
+                int modulePathIndex = compilerArgs.indexOf('--module-path')
+                if (modulePathIndex > -1) {
+                    baseCmd << '--module-path'
+                    baseCmd << compilerArgs[modulePathIndex + 1]
+                } else {
+                    baseCmd << '--module-path'
+                    baseCmd << classpath
+                }
+            } else if (classpath) {
+                baseCmd << '--class-path'
+                baseCmd << classpath
+            } else {
+                int modulePathIndex = compilerArgs.indexOf('--module-path')
+                if (modulePathIndex > -1) {
+                    baseCmd << '--module-path'
+                    baseCmd << compilerArgs[modulePathIndex + 1]
+                }
+            }
+            if (!moduleOptions.addModules.empty) {
+                baseCmd << '--add-modules'
+                baseCmd << moduleOptions.addModules.join(',')
+            } else {
+                int addModulesIndex = compilerArgs.indexOf('--add-modules')
+                if (addModulesIndex > -1) {
+                    baseCmd << '--add-modules'
+                    baseCmd << compilerArgs[addModulesIndex + 1]
+                }
+            }
+            List<String> requires = resolvedRequires.get()
+            List<String> packages = resolvedPackages.get()
+            String regex = resolvedRegex.orNull
+            int exclusive = 0
+            if (!requires.isEmpty()) {
+                exclusive++
+            }
+            if (!packages.isEmpty()) {
+                exclusive++
+            }
+            if (regex) {
+                exclusive++
+            }
+            if (exclusive > 1) {
+                throw new IllegalArgumentException("--package, --regex, --require are mutually exclusive")
+            }
+
+            if (resolvedMissingDeps.get()) {
+                exclusive = 1
+                if (!packages.isEmpty()) {
+                    exclusive++
+                }
+                if (regex) {
+                    exclusive++
+                }
+                if (exclusive > 1) {
+                    throw new IllegalArgumentException("--package, --regex, --missing-deps are mutually exclusive")
+                }
+            }
+            requires.each { s ->
+                baseCmd << '--require'
+                baseCmd << s
+            }
+            packages.each { s ->
+                baseCmd << '--package'
+                baseCmd << s
+            }
+            if (regex) {
+                baseCmd << '--regex'
+                baseCmd << regex
+            }
+            if (resolvedFilter.get()) {
+                String filter = resolvedFilter.get()
+                if (filter in [':package', ':archive', ':module', ':none']) {
+                    baseCmd << '-filter' + filter
+                } else {
+                    baseCmd << '-filter'
+                    baseCmd << filter
+                }
+            }
+        }
+        // compileJava.get().classpath = project.files()
+        //logger.info("jdeps version is ${executeCommand(['jdeps', '-version'])}")
+        //Map<String, String> outputs = [:]
+        resolvedSourceSets.get().each { sc ->
+            SourceSet sourceSet = javaPluginConvention.get().sourceSets.findByName(sc)
+            logger.info("Running jdeps on sourceSet ${sourceSet.name}")
+            sourceSet.output.files.each { File file ->
+                if (!file.exists()) {
+                    return // skip
+                }
+                List<String> cmd = applyExplicitCommand(baseCmd)
+                logger.info("jdeps command set to ${cmd.join(' ')}")
+                executeCommandOn(cmd, file.absolutePath)
+                /*if (output) {
+                    commandOutput << "\nProject: ${projectName.get()}\n${output}".toString()
+                    outputs[sourceSet.name] = output
+                }*/
+                List<String> warnings = getWarnings(output)
+                if (warnings && getResolvedFailOnWarning().get()) {
+                    throw new IllegalStateException("jdeps reported warnings: " +
+                        System.lineSeparator() +
+                        warnings.join(System.lineSeparator()))
+                }
+                List<String> errors = getErrors(output)
+                if (errors) {
+                    throw new IllegalStateException("jdeps reported errors: " +
+                        System.lineSeparator() +
+                        errors.join(System.lineSeparator()))
+                }
+            }
+        }
+        for (String c : resolvedConfigurations.get()) {
+            inspectConfiguration(projectConfigurations[c.trim()], baseCmd)
+        }
+        for (String c : resolvedClasspaths.get()) {
+            inspectConfiguration(projectConfigurations[c.trim()], baseCmd)
+        }
+        /*if (commandOutput) {
+            commandOutput = commandOutput.unique()
+            if (resolvedConsoleOutput.get()) {
+                println commandOutput.join('\n')
+            }
+            File parentFile = reportDir.get().asFile
+            if (!parentFile.exists()) {
+                parentFile.mkdirs()
+            }
+            File logFile = new File(parentFile, 'jdeps-report.txt')
+            logFile.append(commandOutput.join('\n'))
+            String prefix = 'jdeps-'
+            if (resolvedListDeps.get()) {
+                prefix = 'list-deps-'
+            } else if (resolvedListReducedDeps.get()) {
+                prefix = 'list-reduced-deps-'
+            } else if (resolvedPrintModuleDeps.get()) {
+                prefix = 'print-module-deps-'
+            }
+            outputs.each { k, v ->
+                logFile = new File(parentFile, prefix + k + '.txt')
+                logFile.append(v)
+            }
+        }*/
+    }
+
+    private void inspectConfiguration(Configuration configuration,
+                                      List<String> baseCmd) {
+        logger.info("Running jdeps on configuration ${configuration.name}")
+        configuration.resolve().each { File file ->
+            if (!file.exists()) {
+                return // skip
+            }
+            List<String> command = new ArrayList<>(baseCmd)
+            if (JavaVersion.current().java9Compatible) {
+                String multiReleaseVersion = resolveMultiReleaseVersion(file.name, resolvedMultiReleaseJars.get())
+                if (multiReleaseVersion) {
+                    command.add(1, multiReleaseVersion)
+                    command.add(1, '--multi-release')
+                }
+            }
+            command = applyExplicitCommand(command)
+            logger.info("jdeps command set to: ${command.join(' ')} ${file.absolutePath}")
+            executeCommandOn(command, file.absolutePath)
+            //if (output) {
+                //commandOutput << "\nDependency: ${file.name}\n${output}".toString()
+                //outputs[configuration.name] = output
+            //}
+            /*List<String> warnings = getWarnings(output)
+            if (warnings && getResolvedFailOnWarning().get()) {
+                throw new IllegalStateException("jdeps reported errors/warnings: " +
+                    System.lineSeparator() +
+                    warnings.join(System.lineSeparator()))
+            }*/
+        }
+    }
+
+    private List<String> applyExplicitCommand(List<String> cmd) {
+        List<String> c = new ArrayList<>(cmd)
+        String subcommand = ''
+        if (resolvedListDeps.get()) {
+            subcommand = '--list-deps'
+        } else if (resolvedListReducedDeps.get()) {
+            subcommand = '--list-reduced-deps'
+        } else if (resolvedPrintModuleDeps.get()) {
+            subcommand = '--print-module-deps'
+        }
+        if (subcommand) {
+            if (c.contains('--class-path')) {
+                c.add(c.indexOf('--class-path'), subcommand)
+            } else if (c.contains('--module-path')) {
+                c.add(c.indexOf('--module-path'), subcommand)
+            } else {
+                c << subcommand
+            }
+        }
+        c
+    }
+
+    private String executeCommandOn(List<String> baseCmd, String path) {
+        List<String> cmd = []
+        cmd.addAll(baseCmd)
+        cmd.add(path)
+        return executeCommand(cmd)
+    }
+
+    private String executeCommand(List<String> cmd) {
+        ByteArrayOutputStream out = new ByteArrayOutputStream()
+        execOperations.exec(e -> {
+            e.setErrorOutput(out)
+            e.commandLine(cmd)
+        })
+        return out.toString().trim()
+    }
+
+    private static String resolveMultiReleaseVersion(String artifactName, Map<String, String> multiReleaseJars) {
+        for (Map.Entry<String, String> e : multiReleaseJars.entrySet()) {
+            if (artifactName.matches(e.key.trim())) {
+                return e.value.trim()
+            }
+        }
+        null
+    }
+
+    private static List<String> getWarnings(String output) {
+        List<String> warnings = []
+        output.eachLine { String line ->
+            if (WARNING.matcher(line).matches()) {
+                warnings.add(line)
+            }
+        }
+        warnings
+    }
+
+    private static List<String> getErrors(String output) {
+        List<String> errors = []
+        output.eachLine { String line ->
+            if (ERROR.matcher(line).matches()) {
+                errors.add(line)
+            }
+        }
+        errors
+    }
+}

gradle-plugin-jdeps/src/main/groovy/org/xbib/gradle/plugin/jdeps/ModuleOptions.groovy

@@ -0,0 +1,9 @@
+package org.xbib.gradle.plugin.jdeps
+
+import groovy.transform.Canonical
+
+@Canonical
+class ModuleOptions {
+
+    List<String> addModules = []
+}

gradle-plugin-jdeps/src/main/groovy/org/xbib/gradle/plugin/jdeps/util/BooleanState.groovy

@@ -0,0 +1,13 @@
+package org.xbib.gradle.plugin.jdeps.util
+
+import org.gradle.api.provider.Property
+import org.gradle.api.provider.Provider
+
+interface BooleanState {
+
+    Property<Boolean> getProperty()
+
+    Provider<Boolean> getProvider()
+
+    boolean getValue()
+}

gradle-plugin-jdeps/src/main/groovy/org/xbib/gradle/plugin/jdeps/util/DirectoryState.groovy

@@ -0,0 +1,14 @@
+package org.xbib.gradle.plugin.jdeps.util
+
+import org.gradle.api.file.Directory
+import org.gradle.api.file.DirectoryProperty
+import org.gradle.api.provider.Provider
+
+interface DirectoryState {
+
+    DirectoryProperty getProperty()
+
+    Provider<Directory> getProvider()
+
+    Directory getValue()
+}

gradle-plugin-jdeps/src/main/groovy/org/xbib/gradle/plugin/jdeps/util/ListState.groovy

@@ -0,0 +1,13 @@
+package org.xbib.gradle.plugin.jdeps.util
+
+import org.gradle.api.provider.ListProperty
+import org.gradle.api.provider.Provider
+
+interface ListState {
+
+    ListProperty<String> getProperty()
+
+    Provider<List<String>> getProvider()
+
+    List<String> getValue()
+}

gradle-plugin-jdeps/src/main/groovy/org/xbib/gradle/plugin/jdeps/util/MapState.groovy

@@ -0,0 +1,13 @@
+package org.xbib.gradle.plugin.jdeps.util;
+
+import org.gradle.api.provider.MapProperty
+import org.gradle.api.provider.Provider
+
+interface MapState {
+
+    MapProperty<String, String> getProperty()
+
+    Provider<Map<String, String>> getProvider()
+
+    Map<String, String> getValue()
+}

gradle-plugin-jdeps/src/main/groovy/org/xbib/gradle/plugin/jdeps/util/SimpleBooleanState.groovy

@@ -0,0 +1,100 @@
+package org.xbib.gradle.plugin.jdeps.util
+
+import org.gradle.api.Project
+import org.gradle.api.Task
+import org.gradle.api.internal.provider.Providers
+import org.gradle.api.provider.Property
+import org.gradle.api.provider.Provider
+import org.gradle.api.provider.ProviderFactory
+
+import static java.util.Objects.requireNonNull
+
+final class SimpleBooleanState implements BooleanState {
+
+    final Property<Boolean> property
+
+    final Provider<Boolean> provider
+
+    private final Project project
+
+    SimpleBooleanState(Project project,
+                       Property<Boolean> property,
+                       Provider<Boolean> provider) {
+        this.project = requireNonNull(project, "Argument 'project' must not be null")
+        this.property = requireNonNull(property, "Argument 'property' must not be null")
+        this.provider = requireNonNull(provider, "Argument 'provider' must not be null")
+    }
+
+    @Override
+    boolean getValue() {
+        booleanProvider(project.providers, property, provider, false).get()
+    }
+
+    static SimpleBooleanState of(Task task,
+                                 String key,
+                                 boolean defaultValue) {
+        requireNonNull(task, "Argument 'task' must not be null")
+        Project project = task.project
+        Property<Boolean> property = project.objects.property(Boolean).convention(Providers.<Boolean>notDefined())
+        Provider<Boolean> provider = booleanProvider(key, property, project, defaultValue)
+        new SimpleBooleanState(project, property, provider)
+    }
+
+    static Provider<Boolean> booleanProvider(ProviderFactory providers,
+                                             Property<Boolean> property,
+                                             Provider<Boolean> provider,
+                                             boolean defaultValue) {
+        providers.provider {
+            return provider ? provider.getOrElse(property.getOrElse(defaultValue)) : property.getOrElse(defaultValue)
+        }
+    }
+
+    static Provider<Boolean> booleanProvider(String key,
+                                             Property<Boolean> property,
+                                             Project project,
+                                             boolean defaultValue) {
+        booleanProvider(toEnv(key), toProperty(key), property, project, defaultValue)
+    }
+
+    static Provider<Boolean> booleanProvider(String envKey,
+                                             String propertyKey,
+                                             Property<Boolean> property,
+                                             Project project,
+                                             boolean defaultValue) {
+        project.providers.provider {
+            String value = resolveValue(envKey, propertyKey, project)
+            return !isBlank(value) ? Boolean.parseBoolean(value) : property.getOrElse(defaultValue)
+        }
+    }
+
+    private static String resolveValue(String envKey, String propertyKey, Project project) {
+        String value = System.getenv(envKey)
+        if (isBlank(value)) {
+            value = System.getProperty(propertyKey)
+        }
+        if (isBlank(value)) {
+            value = project.findProperty(propertyKey) as String
+        }
+        return value
+    }
+
+    private static boolean isBlank(String str) {
+        if (str == null || str.length() == 0) {
+            return true
+        }
+        for (char c : str.toCharArray()) {
+            if (!Character.isWhitespace(c)) {
+                return false
+            }
+        }
+        return true
+    }
+
+    private static String toEnv(String key) {
+        key.toUpperCase().replace('.', '_')
+    }
+
+    private static String toProperty(String key) {
+        key.uncapitalize().replace('_', '.')
+    }
+}

gradle-plugin-jdeps/src/main/groovy/org/xbib/gradle/plugin/jdeps/util/SimpleDirectoryState.groovy

@@ -0,0 +1,107 @@
+package org.xbib.gradle.plugin.jdeps.util
+
+import org.gradle.api.Project
+import org.gradle.api.Task
+import org.gradle.api.file.Directory
+import org.gradle.api.file.DirectoryProperty
+import org.gradle.api.internal.provider.Providers
+import org.gradle.api.provider.Provider
+import org.gradle.api.provider.ProviderFactory
+
+import java.nio.file.Paths
+
+import static java.util.Objects.requireNonNull
+
+final class SimpleDirectoryState implements DirectoryState {
+
+    final DirectoryProperty property
+
+    final Provider<Directory> provider
+
+    private final Project project
+
+    SimpleDirectoryState(Project project,
+                         DirectoryProperty property,
+                         Provider<Directory> provider) {
+        this.project = requireNonNull(project, "Argument 'project' must not be null")
+        this.property = requireNonNull(property, "Argument 'property' must not be null")
+        this.provider = requireNonNull(provider, "Argument 'provider' must not be null")
+    }
+
+    @Override
+    Directory getValue() {
+        directoryProvider(project.providers, property, provider, (Directory) null).get()
+    }
+
+    static SimpleDirectoryState of(Task task, String key, Directory defaultValue) {
+        requireNonNull(task, "Argument 'task' must not be null")
+        Project project = task.project
+        DirectoryProperty property = project.objects.directoryProperty().convention(Providers.<Directory>notDefined())
+        Provider<Directory> provider = directoryProvider(key, property, project, defaultValue)
+        new SimpleDirectoryState(project, property, provider)
+    }
+
+    static Provider<Directory> directoryProvider(ProviderFactory providers,
+                                                 DirectoryProperty property,
+                                                 Provider<Directory> provider,
+                                                 Directory defaultValue) {
+        providers.provider {
+            return provider ? provider.getOrElse(property.getOrElse(defaultValue)) : property.getOrElse(defaultValue)
+        }
+    }
+
+    static Provider<Directory> directoryProvider(String key,
+                                                 DirectoryProperty property,
+                                                 Project project,
+                                                 Directory defaultValue) {
+        directoryProvider(toEnv(key), toProperty(key), property, project, defaultValue)
+    }
+
+    static Provider<Directory> directoryProvider(String envKey,
+                                                 String propertyKey,
+                                                 DirectoryProperty property,
+                                                 Project project,
+                                                 Directory defaultValue) {
+        project.providers.provider {
+            String value = resolveValue(envKey, propertyKey, project)
+            if (!isBlank(value)) {
+                DirectoryProperty p = project.objects.directoryProperty()
+                p.set(Paths.get(value).toFile())
+                return p.get()
+            }
+            return property.getOrElse(defaultValue)
+        }
+    }
+
+
+    private static String resolveValue(String envKey, String propertyKey, Project project) {
+        String value = System.getenv(envKey)
+        if (isBlank(value)) {
+            value = System.getProperty(propertyKey)
+        }
+        if (isBlank(value)) {
+            value = project.findProperty(propertyKey) as String
+        }
+        return value
+    }
+
+    private static boolean isBlank(String str) {
+        if (str == null || str.length() == 0) {
+            return true
+        }
+        for (char c : str.toCharArray()) {
+            if (!Character.isWhitespace(c)) {
+                return false
+            }
+        }
+        return true
+    }
+
+    private static String toEnv(String key) {
+        key.toUpperCase().replace('.', '_')
+    }
+
+    private static String toProperty(String key) {
+        key.uncapitalize().replace('_', '.')
+    }
+}

gradle-plugin-jdeps/src/main/groovy/org/xbib/gradle/plugin/jdeps/util/SimpleListState.groovy

@@ -0,0 +1,108 @@
+package org.xbib.gradle.plugin.jdeps.util
+
+import org.gradle.api.Project
+import org.gradle.api.Task
+import org.gradle.api.internal.provider.Providers
+import org.gradle.api.provider.ListProperty
+import org.gradle.api.provider.Provider
+import org.gradle.api.provider.ProviderFactory
+
+import static java.util.Objects.requireNonNull
+
+final class SimpleListState implements ListState {
+
+    final ListProperty<String> property
+
+    final Provider<List<String>> provider
+
+    private final Project project
+
+    SimpleListState(Project project,
+                    ListProperty<String> property,
+                    Provider<List<String>> provider) {
+        this.project = requireNonNull(project, "Argument 'project' must not be null")
+        this.property = requireNonNull(property, "Argument 'property' must not be null")
+        this.provider = requireNonNull(provider, "Argument 'provider' must not be null")
+    }
+
+    @Override
+    List<String> getValue() {
+        listProvider(project.providers, property, provider, Collections.<String> emptyList()).get()
+    }
+
+    static SimpleListState of(Task task, String key, List<String> defaultValue) {
+        requireNonNull(task, "Argument 'task' must not be null")
+        Project project = task.project
+        ListProperty<String> property = project.objects.listProperty(String).convention(Providers.<List<String>>notDefined())
+        Provider<List<String>> provider = listProvider(key, property, project, defaultValue)
+        new SimpleListState(project, property, provider)
+    }
+
+    static Provider<List<String>> listProvider(ProviderFactory providers,
+                                               ListProperty<String> property,
+                                               Provider<List<String>> provider,
+                                               List<String> defaultValue) {
+        providers.provider {
+            return provider ? provider.getOrElse(property.getOrElse(defaultValue)) : property.getOrElse(defaultValue)
+        }
+    }
+
+    static Provider<List<String>> listProvider(String key,
+                                               ListProperty<String> property,
+                                               Project project,
+                                               List<String> defaultValue) {
+        listProvider(toEnv(key), toProperty(key), property, project, defaultValue)
+    }
+
+    static Provider<List<String>> listProvider(String envKey,
+                                               String propertyKey,
+                                               ListProperty<String> property,
+                                               Project project,
+                                               List<String> defaultValue) {
+        project.providers.provider {
+            if (property.present) {
+                return property.get()
+            }
+            String value = resolveValue(envKey, propertyKey, project)
+            if (!isBlank(value)) {
+                List<String> list = new ArrayList<>()
+                for (String v : value.split(',')) {
+                    if (!isBlank(v)) list.add(v.trim())
+                }
+                return list
+            }
+            defaultValue
+        }
+    }
+
+    private static String resolveValue(String envKey, String propertyKey, Project project) {
+        String value = System.getenv(envKey)
+        if (isBlank(value)) {
+            value = System.getProperty(propertyKey)
+        }
+        if (isBlank(value)) {
+            value = project.findProperty(propertyKey) as String
+        }
+        return value
+    }
+
+    private static boolean isBlank(String str) {
+        if (str == null || str.length() == 0) {
+            return true
+        }
+        for (char c : str.toCharArray()) {
+            if (!Character.isWhitespace(c)) {
+                return false
+            }
+        }
+        return true
+    }
+
+    private static String toEnv(String key) {
+        key.toUpperCase().replace('.', '_')
+    }
+
+    private static String toProperty(String key) {
+        key.uncapitalize().replace('_', '.')
+    }
+}

gradle-plugin-jdeps/src/main/groovy/org/xbib/gradle/plugin/jdeps/util/SimpleMapState.groovy

@@ -0,0 +1,115 @@
+package org.xbib.gradle.plugin.jdeps.util
+
+import org.gradle.api.Project
+import org.gradle.api.Task
+import org.gradle.api.internal.provider.Providers
+import org.gradle.api.provider.MapProperty
+import org.gradle.api.provider.Provider
+import org.gradle.api.provider.ProviderFactory
+
+import static java.util.Objects.requireNonNull
+
+final class SimpleMapState implements MapState {
+
+    final MapProperty<String, String> property
+
+    final Provider<Map<String, String>> provider
+
+    private final Project project
+
+    SimpleMapState(Project project,
+                   MapProperty<String, String> property,
+                   Provider<Map<String, String>> provider) {
+        this.project = requireNonNull(project, "Argument 'project' must not be null")
+        this.property = requireNonNull(property, "Argument 'property' must not be null")
+        this.provider = requireNonNull(provider, "Argument 'provider' must not be null")
+    }
+
+    @Override
+    Map<String, String> getValue() {
+        mapProvider(project.providers, property, provider, Collections.<String, String> emptyMap()).get()
+    }
+
+    static SimpleMapState of(Task task, String key, Map<String, String> defaultValue) {
+        requireNonNull(task, "Argument 'task' must not be null")
+        Project project = task.project
+        MapProperty<String, String> property = project.objects.mapProperty(String, String).convention(Providers.<Map<String, String>>notDefined())
+        Provider<Map<String, String>> provider = mapProvider(key, property, project, defaultValue)
+        new SimpleMapState(project, property, provider)
+    }
+
+    static <K, V> Provider<Map<K, V>> mapProvider(ProviderFactory providers,
+                                                  MapProperty<K, V> property,
+                                                  Provider<Map<K, V>> provider,
+                                                  Map<K, V> defaultValue) {
+        providers.provider {
+            Map<K, V> map = new LinkedHashMap<>(defaultValue)
+            if (property.present) {
+                map.putAll(property.get())
+            }
+            if (provider) {
+                map.putAll(provider.get())
+            }
+            return map
+        }
+    }
+
+    static <K,V> Provider<Map<K, V>> mapProvider(String key,
+                                                 MapProperty<K, V> property,
+                                                 Project project,
+                                                 Map<K, V> defaultValue) {
+        mapProvider(toEnv(key), toProperty(key), property, project, defaultValue)
+    }
+
+    static <K, V> Provider<Map<K, V>> mapProvider(String envKey,
+                                                  String propertyKey,
+                                                  MapProperty<K, V> property,
+                                                  Project project,
+                                                  Map<K, V> defaultValue) {
+        project.providers.provider {
+            String value = resolveValue(envKey, propertyKey, project)
+            if (i!sBlank(value)) {
+                Map<K, V> map = new LinkedHashMap<>()
+                for (String val : value.split(',')) {
+                    String[] kv = val.split('=')
+                    if (kv.length == 2) {
+                        map.put(kv[0] as K, kv[1] as V)
+                    }
+                }
+                return map
+            }
+            return property.orElse(defaultValue).get()
+        }
+    }
+
+    private static String resolveValue(String envKey, String propertyKey, Project project) {
+        String value = System.getenv(envKey)
+        if (isBlank(value)) {
+            value = System.getProperty(propertyKey)
+        }
+        if (isBlank(value)) {
+            value = project.findProperty(propertyKey) as String
+        }
+        return value
+    }
+
+    private static boolean isBlank(String str) {
+        if (str == null || str.length() == 0) {
+            return true
+        }
+        for (char c : str.toCharArray()) {
+            if (!Character.isWhitespace(c)) {
+                return false
+            }
+        }
+        return true
+    }
+
+    private static String toEnv(String key) {
+        key.toUpperCase().replace('.', '_')
+    }
+
+    private static String toProperty(String key) {
+        key.uncapitalize().replace('_', '.')
+    }
+}

gradle-plugin-jdeps/src/main/groovy/org/xbib/gradle/plugin/jdeps/util/SimpleStringState.groovy

@@ -0,0 +1,98 @@
+package org.xbib.gradle.plugin.jdeps.util
+
+import org.gradle.api.Project
+import org.gradle.api.Task
+import org.gradle.api.internal.provider.Providers
+import org.gradle.api.provider.Property
+import org.gradle.api.provider.Provider
+import org.gradle.api.provider.ProviderFactory
+
+import static java.util.Objects.requireNonNull
+
+final class SimpleStringState implements StringState {
+
+    final Property<String> property
+
+    final Provider<String> provider
+
+    private final Project project
+
+    @Override
+    String getValue() {
+        stringProvider(project.providers, property, provider, '').get()
+    }
+
+    SimpleStringState(Project project,
+                      Property<String> property,
+                      Provider<String> provider) {
+        this.project = requireNonNull(project,  "Argument 'project' must not be null")
+        this.property = requireNonNull(property, "Argument 'property' must not be null")
+        this.provider = requireNonNull(provider, "Argument 'provider' must not be null")
+    }
+
+    static SimpleStringState of(Task task, String key, String defaultValue) {
+        requireNonNull(task, "Argument 'task' must not be null")
+        Project project = task.project
+        Property<String> property = project.objects.property(String).convention(Providers.<String>notDefined())
+        Provider<String> provider = stringProvider(key, property, project, defaultValue)
+        new SimpleStringState(project, property, provider)
+    }
+
+    static Provider<String> stringProvider(ProviderFactory providers,
+                                           Property<String> property,
+                                           Provider<String> provider,
+                                           String defaultValue) {
+        providers.provider {
+            return provider ? provider.getOrElse(property.getOrElse(defaultValue)) : property.getOrElse(defaultValue)
+        }
+    }
+
+    static Provider<String> stringProvider(String key,
+                                           Property<String> property,
+                                           Project project,
+                                           String defaultValue) {
+        stringProvider(toEnv(key), toProperty(key), property, project, defaultValue)
+    }
+
+    static Provider<String> stringProvider(String envKey,
+                                           String propertyKey,
+                                           Property<String> property,
+                                           Project project,
+                                           String defaultValue) {
+        project.providers.provider {
+            String value = resolveValue(envKey, propertyKey, project)
+            return !isBlank(value) ? value : property.getOrElse(defaultValue)
+        }
+    }
+
+    private static String resolveValue(String envKey, String propertyKey, Project project) {
+        String value = System.getenv(envKey)
+        if (isBlank(value)) {
+            value = System.getProperty(propertyKey)
+        }
+        if (isBlank(value)) {
+            value = project.findProperty(propertyKey) as String
+        }
+        return value
+    }
+
+    private static boolean isBlank(String str) {
+        if (str == null || str.length() == 0) {
+            return true
+        }
+        for (char c : str.toCharArray()) {
+            if (!Character.isWhitespace(c)) {
+                return false
+            }
+        }
+        return true
+    }
+
+    private static String toEnv(String key) {
+        key.toUpperCase().replace('.', '_')
+    }
+
+    private static String toProperty(String key) {
+        key.uncapitalize().replace('_', '.')
+    }
+}

gradle-plugin-jdeps/src/main/groovy/org/xbib/gradle/plugin/jdeps/util/StringState.groovy

@@ -0,0 +1,13 @@
+package org.xbib.gradle.plugin.jdeps.util
+
+import org.gradle.api.provider.Property
+import org.gradle.api.provider.Provider
+
+interface StringState {
+
+    Property<String> getProperty()
+
+    Provider<String> getProvider()
+
+    String getValue()
+}

gradle-plugin-jflex/gradle.properties

@@ -1,2 +1,2 @@
 name = gradle-plugin-jflex
-version = 3.0.2
+version = 3.1.0

gradle-plugin-jlink/build.gradle

@@ -0,0 +1,32 @@
+plugins {
+    id 'java-gradle-plugin'
+    alias(libs.plugins.publish)
+}
+
+apply plugin: 'java-gradle-plugin'
+apply plugin: 'com.gradle.plugin-publish'
+
+apply from: rootProject.file('gradle/compile/groovy.gradle')
+apply from: rootProject.file('gradle/test/junit5.gradle')
+
+dependencies {
+    api gradleApi()
+    testImplementation gradleTestKit()
+}
+
+if (project.hasProperty('gradle.publish.key')) {
+    gradlePlugin {
+        website = 'https://xbib.org/joerg/gradle-plugins/src/branch/main/gradle-plugin-jlink'
+        vcsUrl = 'https://xbib.org/joerg/gradle-plugins'
+        plugins {
+            jlinkPlugin {
+                id = 'org.xbib.gradle.plugin.jlink'
+                implementationClass = 'org.xbib.gradle.plugin.jlink.JlinkPlugin'
+                version = project.version
+                description = 'Gradle Jlink plugin'
+                displayName = 'Gradle Jlink plugin'
+                tags.set(['jlink'])
+            }
+        }
+    }
+}

gradle-plugin-jpackage/NOTICE.txt

@@ -0,0 +1,9 @@
+This work is based on
+
+https://github.com/gradlex-org/java-module-packaging
+
+by Jendrik Johannes
+
+as of Feb 11, 2024
+
+License: Apache 2.0

gradle-plugin-jpackage/build.gradle

@@ -0,0 +1,34 @@
+plugins {
+    id 'java-gradle-plugin'
+    alias(libs.plugins.publish)
+}
+
+apply plugin: 'java-gradle-plugin'
+apply plugin: 'com.gradle.plugin-publish'
+
+apply from: rootProject.file('gradle/compile/groovy.gradle')
+apply from: rootProject.file('gradle/test/junit5.gradle')
+
+dependencies {
+    api gradleApi()
+    testImplementation gradleTestKit()
+    testImplementation testLibs.spock.core
+    testImplementation testLibs.spock.junit4
+}
+
+if (project.hasProperty('gradle.publish.key')) {
+    gradlePlugin {
+        website = 'https://xbib.org/joerg/gradle-plugins/src/branch/main/gradle-plugin-jpackage'
+        vcsUrl = 'https://xbib.org/joerg/gradle-plugins'
+        plugins {
+            jpackagePlugin {
+                id = 'org.xbib.gradle.plugin.jpackage'
+                implementationClass = 'org.xbib.gradle.plugin.jpackage.JPackagePlugin'
+                version = project.version
+                description = 'Gradle JPackage plugin'
+                displayName = 'Gradle JPackage plugin'
+                tags.set(['jpackage'])
+            }
+        }
+    }
+}

gradle-plugin-jpackage/src/main/java/org/xbib/gradle/plugin/jpackage/JPackageExtension.java

@@ -0,0 +1,204 @@
+package org.xbib.gradle.plugin.jpackage;
+
+import java.util.Arrays;
+import java.util.Collections;
+import javax.inject.Inject;
+import org.gradle.api.Action;
+import org.gradle.api.NamedDomainObjectContainer;
+import org.gradle.api.NonNullApi;
+import org.gradle.api.Project;
+import org.gradle.api.Task;
+import org.gradle.api.artifacts.Configuration;
+import org.gradle.api.artifacts.ConfigurationContainer;
+import org.gradle.api.attributes.Attribute;
+import org.gradle.api.attributes.Bundling;
+import org.gradle.api.attributes.Category;
+import org.gradle.api.attributes.LibraryElements;
+import org.gradle.api.attributes.Usage;
+import org.gradle.api.attributes.java.TargetJvmEnvironment;
+import org.gradle.api.file.ConfigurableFileCollection;
+import org.gradle.api.file.DirectoryProperty;
+import org.gradle.api.model.ObjectFactory;
+import org.gradle.api.plugins.ApplicationPlugin;
+import org.gradle.api.plugins.JavaApplication;
+import org.gradle.api.plugins.JavaPluginExtension;
+import org.gradle.api.provider.Property;
+import org.gradle.api.tasks.JavaExec;
+import org.gradle.api.tasks.SourceSet;
+import org.gradle.api.tasks.SourceSetContainer;
+import org.gradle.api.tasks.TaskContainer;
+import org.gradle.api.tasks.TaskProvider;
+import org.gradle.jvm.toolchain.JavaToolchainService;
+import org.gradle.nativeplatform.MachineArchitecture;
+import org.gradle.nativeplatform.OperatingSystemFamily;
+import static org.gradle.language.base.plugins.LifecycleBasePlugin.ASSEMBLE_TASK_NAME;
+import static org.gradle.language.base.plugins.LifecycleBasePlugin.BUILD_GROUP;
+import static org.gradle.nativeplatform.MachineArchitecture.ARCHITECTURE_ATTRIBUTE;
+import static org.gradle.nativeplatform.OperatingSystemFamily.LINUX;
+import static org.gradle.nativeplatform.OperatingSystemFamily.MACOS;
+import static org.gradle.nativeplatform.OperatingSystemFamily.OPERATING_SYSTEM_ATTRIBUTE;
+import static org.gradle.nativeplatform.OperatingSystemFamily.WINDOWS;
+
+@NonNullApi
+public abstract class JPackageExtension {
+
+    public abstract Property<String> getApplicationName();
+
+    public abstract Property<String> getApplicationVersion();
+
+    public abstract Property<String> getApplicationDescription();
+
+    public abstract Property<String> getVendor();
+
+    public abstract Property<String> getCopyright();
+
+    public abstract DirectoryProperty getJpackageResources();
+
+    public abstract ConfigurableFileCollection getResources();
+
+    private final NamedDomainObjectContainer<JPackageTarget> targets = getObjects().domainObjectContainer(JPackageTarget.class);
+
+    @Inject
+    protected abstract JavaToolchainService getJavaToolchains();
+
+    @Inject
+    protected abstract ObjectFactory getObjects();
+
+    @Inject
+    protected abstract Project getProject();
+
+    public JPackageTarget target(String label, Action<? super JPackageTarget> action) {
+        JPackageTarget target;
+        if (targets.getNames().contains(label)) {
+            target = targets.getByName(label);
+        } else {
+            target = targets.create(label, this::newTarget);
+        }
+        action.execute(target);
+        return target;
+    }
+
+    public JPackageTarget primaryTarget(JPackageTarget target) {
+        SourceSetContainer sourceSets = getProject().getExtensions().getByType(SourceSetContainer.class);
+        ConfigurationContainer configurations = getProject().getConfigurations();
+        sourceSets.all(sourceSet -> {
+            configureTargetAttributes(configurations.getByName(sourceSet.getCompileClasspathConfigurationName()), target);
+            configureTargetAttributes(configurations.getByName(sourceSet.getRuntimeClasspathConfigurationName()), target);
+            configurations.matching(conf -> "mainRuntimeClasspath".equals(conf.getName())).all(conf -> configureTargetAttributes(conf, target));
+        });
+
+        return target;
+    }
+
+    private void newTarget(JPackageTarget target) {
+        target.getPackageTypes().convention(target.getOperatingSystem().map(os -> switch (os) {
+            case WINDOWS -> Arrays.asList("exe", "msi");
+            case MACOS -> Arrays.asList("pkg", "dmg");
+            case LINUX -> Arrays.asList("rpm");
+            default -> Collections.emptyList();
+        }));
+        ConfigurationContainer configurations = getProject().getConfigurations();
+        SourceSetContainer sourceSets = getProject().getExtensions().getByType(SourceSetContainer.class);
+        sourceSets.all(sourceSet -> {
+            Configuration internal = maybeCreateInternalConfiguration();
+            configurations.create(target.getName() + capitalize(sourceSet.getCompileClasspathConfigurationName()), c -> {
+                c.setCanBeConsumed(false);
+                c.setVisible(false);
+                configureJavaStandardAttributes(c, Usage.JAVA_API);
+                configureTargetAttributes(c, target);
+                c.extendsFrom(
+                        configurations.getByName(sourceSet.getImplementationConfigurationName()),
+                        configurations.getByName(sourceSet.getCompileOnlyConfigurationName()),
+                        internal
+                );
+            });
+            Configuration runtimeClasspath = configurations.create(target.getName() + capitalize(sourceSet.getRuntimeClasspathConfigurationName()), c -> {
+                c.setCanBeConsumed(false);
+                c.setVisible(false);
+                configureJavaStandardAttributes(c, Usage.JAVA_RUNTIME);
+                configureTargetAttributes(c, target);
+                c.extendsFrom(
+                        configurations.getByName(sourceSet.getImplementationConfigurationName()),
+                        configurations.getByName(sourceSet.getRuntimeOnlyConfigurationName()),
+                        internal
+                );
+            });
+            if (SourceSet.isMain(sourceSet)) {
+                getProject().getPlugins().withType(ApplicationPlugin.class, p -> registerTargetSpecificTasks(target, sourceSet.getJarTaskName(), runtimeClasspath));
+            }
+        });
+    }
+
+    private void configureJavaStandardAttributes(Configuration resolvable, String usage) {
+        resolvable.getAttributes().attribute(Usage.USAGE_ATTRIBUTE, getObjects().named(Usage.class, usage));
+        resolvable.getAttributes().attribute(Category.CATEGORY_ATTRIBUTE, getObjects().named(Category.class, Category.LIBRARY));
+        resolvable.getAttributes().attribute(LibraryElements.LIBRARY_ELEMENTS_ATTRIBUTE, getObjects().named(LibraryElements.class, LibraryElements.JAR));
+        resolvable.getAttributes().attribute(TargetJvmEnvironment.TARGET_JVM_ENVIRONMENT_ATTRIBUTE, getObjects().named(TargetJvmEnvironment.class, TargetJvmEnvironment.STANDARD_JVM));
+        resolvable.getAttributes().attribute(Bundling.BUNDLING_ATTRIBUTE, getObjects().named(Bundling.class, Bundling.EXTERNAL));
+        resolvable.getAttributes().attribute(Attribute.of("javaModule", Boolean.class), true);
+    }
+
+    private void configureTargetAttributes(Configuration resolvable, JPackageTarget target) {
+        resolvable.getAttributes().attributeProvider(OPERATING_SYSTEM_ATTRIBUTE, target.getOperatingSystem().map(name -> getObjects().named(OperatingSystemFamily.class, name)));
+        resolvable.getAttributes().attributeProvider(ARCHITECTURE_ATTRIBUTE, target.getArchitecture().map(name -> getObjects().named(MachineArchitecture.class, name)));
+    }
+
+    private void registerTargetSpecificTasks(JPackageTarget target, String applicationJarTask, Configuration runtimeClasspath) {
+        TaskContainer tasks = getProject().getTasks();
+        JavaPluginExtension java = getProject().getExtensions().getByType(JavaPluginExtension.class);
+        JavaApplication application = getProject().getExtensions().getByType(JavaApplication.class);
+        TaskProvider<JPackageTask> jpackage = tasks.register("jpackage" + capitalize(target.getName()), JPackageTask.class, t -> {
+            t.getJavaInstallation().convention(getJavaToolchains().compilerFor(java.getToolchain()).get().getMetadata());
+            t.getOperatingSystem().convention(target.getOperatingSystem());
+            t.getArchitecture().convention(target.getArchitecture());
+            t.getMainModule().convention(application.getMainModule());
+            t.getVersion().convention(getApplicationVersion());
+            t.getModulePath().from(tasks.named(applicationJarTask));
+            t.getModulePath().from(runtimeClasspath);
+            t.getApplicationName().convention(getApplicationName());
+            t.getJpackageResources().convention(getJpackageResources().dir(target.getOperatingSystem()));
+            t.getApplicationDescription().convention(getApplicationDescription());
+            t.getVendor().convention(getVendor());
+            t.getCopyright().convention(getCopyright());
+            t.getJavaOptions().convention(application.getApplicationDefaultJvmArgs());
+            t.getOptions().convention(target.getOptions());
+            t.getPackageTypes().convention(target.getPackageTypes());
+            t.getResources().from(getResources());
+            t.getDestination().convention(getProject().getLayout().getBuildDirectory().dir("packages/" + target.getName()));
+            t.getTempDirectory().convention(getProject().getLayout().getBuildDirectory().dir("tmp/jpackage/" + target.getName()));
+        });
+        tasks.register("run" + capitalize(target.getName()), JavaExec.class, t -> {
+            t.setGroup(ApplicationPlugin.APPLICATION_GROUP);
+            t.setDescription("Run this project as a JVM application on " + target.getName());
+            t.getJavaLauncher().convention(getJavaToolchains().launcherFor(java.getToolchain()));
+            t.getMainModule().convention(application.getMainModule());
+            t.getMainClass().convention(application.getMainClass());
+            t.setJvmArgs(application.getApplicationDefaultJvmArgs());
+            t.classpath(tasks.named("jar"), runtimeClasspath);
+        });
+        String targetAssembleLifecycle = "assemble" + capitalize(target.getName());
+        if (!tasks.getNames().contains(targetAssembleLifecycle)) {
+            TaskProvider<Task> lifecycleTask = tasks.register(targetAssembleLifecycle, t -> {
+                t.setGroup(BUILD_GROUP);
+                t.setDescription("Builds this project for " + target.getName());
+            });
+            tasks.named(ASSEMBLE_TASK_NAME, t -> t.dependsOn(lifecycleTask));
+        }
+        tasks.named(targetAssembleLifecycle, t -> t.dependsOn(jpackage));
+    }
+
+    private Configuration maybeCreateInternalConfiguration() {
+        Configuration internal = getProject().getConfigurations().findByName("internal");
+        if (internal != null) {
+            return internal;
+        }
+        return getProject().getConfigurations().create("internal", i -> {
+            i.setCanBeResolved(false);
+            i.setCanBeConsumed(false);
+        });
+    }
+
+    private String capitalize(String s) {
+        return s.substring(0, 1).toUpperCase() + s.substring(1);
+    }
+}

gradle-plugin-jpackage/src/main/java/org/xbib/gradle/plugin/jpackage/JPackagePlugin.java

@@ -0,0 +1,26 @@
+package org.xbib.gradle.plugin.jpackage;
+
+import org.gradle.api.NonNullApi;
+import org.gradle.api.Plugin;
+import org.gradle.api.Project;
+import org.gradle.api.file.SourceDirectorySet;
+import org.gradle.api.plugins.JavaPlugin;
+import org.gradle.api.tasks.SourceSetContainer;
+
+@SuppressWarnings("unused")
+@NonNullApi
+public abstract class JPackagePlugin implements Plugin<Project> {
+
+    @Override
+    public void apply(Project project) {
+        project.getPlugins().apply(JavaPlugin.class);
+        SourceSetContainer sourceSets = project.getExtensions().getByType(SourceSetContainer.class);
+        SourceDirectorySet mainResources = sourceSets.getByName("main").getResources();
+        JPackageExtension jPackageExtension = project.getExtensions().create("jpackage", JPackageExtension.class);
+        jPackageExtension.getApplicationName().convention(project.getName());
+        jPackageExtension.getApplicationVersion().convention(project.provider(() ->
+                (String) project.getVersion()));
+        jPackageExtension.getJpackageResources().convention(project.provider(() ->
+                project.getLayout().getProjectDirectory().dir(mainResources.getSrcDirs().iterator().next().getParent() + "/resourcesPackage")));
+    }
+}

gradle-plugin-jpackage/src/main/java/org/xbib/gradle/plugin/jpackage/JPackageTarget.java

@@ -0,0 +1,27 @@
+package org.xbib.gradle.plugin.jpackage;
+
+import javax.inject.Inject;
+import org.gradle.api.provider.ListProperty;
+import org.gradle.api.provider.Property;
+
+public abstract class JPackageTarget {
+
+    private final String name;
+
+    public abstract Property<String> getOperatingSystem();
+
+    public abstract Property<String> getArchitecture();
+
+    public abstract ListProperty<String> getPackageTypes();
+
+    public abstract ListProperty<String> getOptions();
+
+    @Inject
+    public JPackageTarget(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+}

gradle-plugin-jpackage/src/main/java/org/xbib/gradle/plugin/jpackage/JPackageTask.java

@@ -0,0 +1,236 @@
+package org.xbib.gradle.plugin.jpackage;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.Arrays;
+import java.util.List;
+import javax.inject.Inject;
+import org.gradle.api.DefaultTask;
+import org.gradle.api.file.ConfigurableFileCollection;
+import org.gradle.api.file.Directory;
+import org.gradle.api.file.DirectoryProperty;
+import org.gradle.api.internal.file.FileOperations;
+import org.gradle.api.provider.ListProperty;
+import org.gradle.api.provider.Property;
+import org.gradle.api.tasks.CacheableTask;
+import org.gradle.api.tasks.Classpath;
+import org.gradle.api.tasks.Input;
+import org.gradle.api.tasks.InputDirectory;
+import org.gradle.api.tasks.InputFiles;
+import org.gradle.api.tasks.Internal;
+import org.gradle.api.tasks.Nested;
+import org.gradle.api.tasks.Optional;
+import org.gradle.api.tasks.OutputDirectory;
+import org.gradle.api.tasks.PathSensitive;
+import org.gradle.api.tasks.PathSensitivity;
+import org.gradle.api.tasks.TaskAction;
+import org.gradle.jvm.toolchain.JavaInstallationMetadata;
+import org.gradle.process.ExecOperations;
+import static java.util.Objects.requireNonNull;
+import static org.gradle.nativeplatform.OperatingSystemFamily.WINDOWS;
+
+@CacheableTask
+public abstract class JPackageTask extends DefaultTask {
+
+    @Nested
+    public abstract Property<JavaInstallationMetadata> getJavaInstallation();
+
+    @Input
+    public abstract Property<String> getOperatingSystem();
+
+    @Input
+    public abstract Property<String> getArchitecture();
+
+    @Input
+    public abstract Property<String> getMainModule();
+
+    @Input
+    public abstract Property<String> getVersion();
+
+    @Classpath
+    public abstract ConfigurableFileCollection getModulePath();
+
+    @Input
+    public abstract Property<String> getApplicationName();
+
+    @Input
+    @Optional
+    public abstract Property<String> getApplicationDescription();
+
+    @InputDirectory
+    @PathSensitive(PathSensitivity.RELATIVE)
+    public abstract DirectoryProperty getJpackageResources();
+
+    @InputFiles
+    @PathSensitive(PathSensitivity.RELATIVE)
+    public abstract ConfigurableFileCollection getResources();
+
+    @Input
+    @Optional
+    public abstract Property<String> getVendor();
+
+    @Input
+    @Optional
+    public abstract Property<String> getCopyright();
+
+    @Input
+    public abstract ListProperty<String> getJavaOptions();
+
+    @Input
+    public abstract ListProperty<String> getOptions();
+
+    @Input
+    public abstract ListProperty<String> getPackageTypes();
+
+    @OutputDirectory
+    public abstract DirectoryProperty getDestination();
+
+    @Internal
+    public abstract DirectoryProperty getTempDirectory();
+
+    @Inject
+    protected abstract FileOperations getFiles();
+
+    @Inject
+    protected abstract ExecOperations getExec();
+
+    @TaskAction
+    public void runJpackage() throws Exception {
+        getFiles().delete(getTempDirectory());
+        getFiles().delete(getDestination());
+        String os = getOperatingSystem().get();
+        String arch = getArchitecture().get();
+        String hostOs = System.getProperty("os.name").replace(" ", "").toLowerCase();
+        String hostArch = System.getProperty("os.arch");
+        validateHostSystem(arch, hostArch, os, hostOs);
+        Directory resourcesDir = getTempDirectory().get().dir("jpackage-resources");
+        Directory appImageParent = getTempDirectory().get().dir("app-image");
+        resourcesDir.getAsFile().mkdirs();
+        getFiles().copy(c -> {
+            c.from(getJpackageResources());
+            c.into(resourcesDir);
+            c.rename(f -> f.replace("icon", getApplicationName().get()));
+        });
+        String executableName = WINDOWS.equals(os) ? "jpackage.exe" : "jpackage";
+        String jpackage = getJavaInstallation().get()
+                .getInstallationPath().file("bin/" + executableName)
+                .getAsFile().getAbsolutePath();
+        getExec().exec(e -> {
+            e.commandLine(
+                    jpackage,
+                    "--type",
+                    "app-image",
+                    "--module",
+                    getMainModule().get(),
+                    "--resource-dir",
+                    resourcesDir.getAsFile().getPath(),
+                    "--app-version",
+                    getVersion().get(),
+                    "--module-path",
+                    getModulePath().getAsPath(),
+                    "--name",
+                    getApplicationName().get(),
+                    "--dest",
+                    appImageParent.getAsFile().getPath()
+            );
+            if (getApplicationDescription().isPresent()) {
+                e.args("--description", getApplicationDescription().get());
+            }
+            if (getVendor().isPresent()) {
+                e.args("--vendor", getVendor().get());
+            }
+            if (getCopyright().isPresent()) {
+                e.args("--copyright", getCopyright().get());
+            }
+            for (String javaOption : getJavaOptions().get()) {
+                e.args("--java-options", javaOption);
+            }
+        });
+        File appImageFolder = requireNonNull(appImageParent.getAsFile().listFiles())[0];
+        File appResourcesFolder;
+        if (os.contains("macos")) {
+            appResourcesFolder = new File(appImageFolder, "Contents/app");
+        } else if (os.contains("windows")) {
+            appResourcesFolder = new File(appImageFolder, "app");
+        } else {
+            appResourcesFolder = new File(appImageFolder, "lib/app");
+        }
+        getFiles().copy(c -> {
+            c.from(getResources());
+            c.into(appResourcesFolder);
+        });
+        getPackageTypes().get().forEach(packageType ->
+                getExec().exec(e -> {
+                    e.commandLine(
+                            jpackage,
+                            "--type",
+                            packageType,
+                            "--app-image",
+                            appImageFolder.getPath(),
+                            "--dest",
+                            getDestination().get().getAsFile().getPath()
+                    );
+                    for (String option : getOptions().get()) {
+                        e.args(option);
+                    }
+                })
+        );
+        generateChecksums();
+    }
+
+    private void generateChecksums() throws NoSuchAlgorithmException, IOException {
+        File destination = getDestination().get().getAsFile();
+        List<File> allFiles = Arrays.stream(requireNonNull(destination.listFiles()))
+                .filter(File::isFile)
+                .toList();
+        for (File result : allFiles) {
+            MessageDigest digest = MessageDigest.getInstance("SHA-256");
+            byte[] encoded = digest.digest(Files.readAllBytes(result.toPath()));
+            Files.write(new File(destination, result.getName() + ".sha256").toPath(), bytesToHex(encoded).getBytes());
+        }
+    }
+
+    private String bytesToHex(byte[] hash) {
+        StringBuilder hexString = new StringBuilder(2 * hash.length);
+        for (byte b : hash) {
+            String hex = Integer.toHexString(0xff & b);
+            if (hex.length() == 1) {
+                hexString.append('0');
+            }
+            hexString.append(hex);
+        }
+        return hexString.toString();
+    }
+
+    private void validateHostSystem(String arch, String hostArch, String os, String hostOs) {
+        if (os.contains("macos")) {
+            if (!hostOs.contains(os)) {
+                wrongHostSystemError(hostOs, os);
+            }
+        } else if (os.contains("windows")) {
+            if (!hostOs.contains(os)) {
+                wrongHostSystemError(hostOs, os);
+            }
+        } else {
+            if (hostOs.contains("windows") || hostOs.contains("macos")) {
+                wrongHostSystemError(hostOs, os);
+            }
+        }
+        if (arch.contains("64") && !hostArch.contains("64")) {
+            wrongHostSystemError(hostArch, arch);
+        }
+        if (arch.contains("aarch") && !hostArch.contains("aarch")) {
+            wrongHostSystemError(hostArch, arch);
+        }
+        if (!arch.contains("aarch") && hostArch.contains("aarch")) {
+            wrongHostSystemError(hostArch, arch);
+        }
+    }
+
+    private void wrongHostSystemError(String hostOs, String os) {
+        throw new RuntimeException("Running on " + hostOs + "; cannot build for " + os);
+    }
+}

gradle-plugin-jpackage/src/test/groovy/org/xbib/gradle/plugin/jpackage/JPackageTest.groovy

@@ -0,0 +1,58 @@
+package org.xbib.gradle.plugin.jpackage
+
+import org.xbib.gradle.plugin.jpackage.fixture.GradleBuild
+import spock.lang.Specification
+
+import static org.gradle.testkit.runner.TaskOutcome.FAILED
+import static org.gradle.testkit.runner.TaskOutcome.SUCCESS
+import static org.xbib.gradle.plugin.jpackage.fixture.GradleBuild.hostOs
+import static org.xbib.gradle.plugin.jpackage.fixture.GradleBuild.runsOnLinux
+import static org.xbib.gradle.plugin.jpackage.fixture.GradleBuild.runsOnMacos
+import static org.xbib.gradle.plugin.jpackage.fixture.GradleBuild.runsOnWindows
+
+class JPackageTest extends Specification {
+
+    @Delegate
+    GradleBuild build = new GradleBuild()
+
+    def "can use plugin on #os with success=#success"() {
+        given:
+        def taskToRun = ":app:assemble${label.capitalize()}"
+        def taskToCheck = ":app:jpackage${label.capitalize()}"
+        def macosArch = System.getProperty('os.arch').contains('aarch') ? 'aarch64' : 'x86-64'
+        appBuildFile << """
+            version = "1.0"
+            jpackage {
+                target("fedora") {
+                    operatingSystem = "linux"
+                    architecture = "x86-64"
+                }
+                target("macos") {
+                    operatingSystem = "macos"
+                    architecture = "$macosArch"
+                }
+                target("windows") {
+                    operatingSystem = "windows"
+                    architecture = "x86-64"
+                }
+            }
+        """
+        appModuleInfoFile << '''
+            module org.example.app {
+            }
+        '''
+
+        when:
+        def result = success ? build(taskToRun) : fail(taskToRun)
+
+        then:
+        result.task(taskToCheck).outcome == (success ? SUCCESS : FAILED)
+        success || result.output.contains("> Running on ${hostOs()}; cannot build for $os")
+
+        where:
+        label     | os        | success
+        'fedora'  | 'linux'   | runsOnLinux()
+        'windows' | 'windows' | runsOnWindows()
+        'macos'   | 'macos'   | runsOnMacos()
+    }
+}

gradle-plugin-jpackage/src/test/groovy/org/xbib/gradle/plugin/jpackage/fixture/GradleBuild.groovy

@@ -0,0 +1,121 @@
+package org.xbib.gradle.plugin.jpackage.fixture
+
+import org.gradle.testkit.runner.BuildResult
+import org.gradle.testkit.runner.GradleRunner
+
+import java.lang.management.ManagementFactory
+import java.nio.file.Files
+
+class GradleBuild {
+
+    final File projectDir
+    final File settingsFile
+    final File appBuildFile
+    final File appModuleInfoFile
+    final File libBuildFile
+    final File libModuleInfoFile
+
+    final String gradleVersionUnderTest = System.getProperty('gradleVersionUnderTest')
+
+    GradleBuild(File projectDir = Files.createTempDirectory('gradle-build').toFile()) {
+        this.projectDir = projectDir
+        this.settingsFile = file('settings.gradle.kts')
+        this.appBuildFile = file('app/build.gradle.kts')
+        this.appModuleInfoFile = file('app/src/main/java/module-info.java')
+        this.libBuildFile = file('lib/build.gradle.kts')
+        this.libModuleInfoFile = file('lib/src/main/java/module-info.java')
+
+        file('app/src/main/resourcesPackage/windows').mkdirs()
+        file('app/src/main/resourcesPackage/macos').mkdirs()
+        file('app/src/main/resourcesPackage/linux').mkdirs()
+
+        settingsFile << '''
+            dependencyResolutionManagement { repositories.mavenCentral() }
+            includeBuild(".")
+            rootProject.name = "test-project"
+            include("app", "lib")
+        '''
+        appBuildFile << '''
+            plugins {
+                id("org.xbib.gradle.plugin.jpackage")
+                id("application")
+            }
+            group = "org.example"
+            application {
+                mainModule.set("org.example.app")
+                mainClass.set("org.example.app.Main")
+            }
+        '''
+        file("app/src/main/java/org/example/app/Main.java") << '''
+            package org.example.app;
+            
+            public class Main {
+                public static void main(String... args) {
+                }
+            }
+        '''
+        file("app/src/test/java/org/example/app/test/MainTest.java") << '''
+            package org.example.app.test;
+            
+            import org.junit.jupiter.api.Test;
+            import org.example.app.Main;
+            
+            public class MainTest {
+                
+                @Test
+                void testApp() {
+                    new Main();
+                }
+            }
+        '''
+
+        libBuildFile << '''
+            plugins {
+                id("org.xbib.gradle.plugin.jpackage")
+                id("java-library")
+            }
+            group = "org.example"
+        '''
+    }
+
+    File file(String path) {
+        new File(projectDir, path).tap {
+            it.getParentFile().mkdirs()
+        }
+    }
+
+    static boolean runsOnWindows() {
+        hostOs().contains('win')
+    }
+
+    static boolean runsOnMacos() {
+        hostOs().contains('mac')
+    }
+
+    static boolean runsOnLinux() {
+        !runsOnWindows() && !runsOnMacos()
+    }
+
+    static String hostOs() {
+        System.getProperty("os.name").replace(" ", "").toLowerCase()
+    }
+
+    BuildResult build(taskToRun) {
+        runner(taskToRun).build()
+    }
+
+    BuildResult fail(taskToRun) {
+        runner(taskToRun).buildAndFail()
+    }
+
+    GradleRunner runner(String... args) {
+        GradleRunner.create()
+                .forwardOutput()
+                .withPluginClasspath()
+                .withProjectDir(projectDir)
+                .withArguments(Arrays.asList(args) + '-s')
+                .withDebug(ManagementFactory.getRuntimeMXBean().getInputArguments().toString().contains("-agentlib:jdwp")).with {
+            gradleVersionUnderTest ? it.withGradleVersion(gradleVersionUnderTest) : it
+        }
+    }
+}

gradle-plugin-rpm/build.gradle

@@ -7,6 +7,7 @@ apply plugin: 'java-gradle-plugin'
 apply plugin: 'com.gradle.plugin-publish'
 
 apply from: rootProject.file('gradle/compile/groovy.gradle')
+apply from: rootProject.file('gradle/test/junit5.gradle')
 
 dependencies {
     api gradleApi()
@@ -34,7 +35,7 @@ if (project.hasProperty('gradle.publish.key')) {
                 version = project.version
                 description = 'Java implementation for RPM packaging'
                 displayName = 'Java implementation for RPM packaging'
-                implementationClass = 'org.xbib.gradle.plugin.RpmPlugin'
+                implementationClass = 'org.xbib.gradle.plugin.rpm.RpmPlugin'
                 tags.set(['rpm'])
             }
         }

gradle-plugin-rpm/gradle.properties

@@ -1,2 +1,2 @@
 name = gradle-plugin-rpm
-version = 3.0.3
+version = 3.1.0

gradle-plugin-rpm/src/main/groovy/org/xbib/gradle/plugin/rpm/Rpm.groovy

@@ -1,4 +1,4 @@
-package org.xbib.gradle.plugin
+package org.xbib.gradle.plugin.rpm
 
 import org.gradle.api.internal.file.copy.CopyAction
 import org.gradle.api.tasks.Input
@@ -127,6 +127,14 @@ class Rpm extends AbstractArchiveTask {
     @Input
     Integer gid
 
+    @Optional
+    @Input
+    Boolean setuid
+
+    @Optional
+    @Input
+    Boolean setgid
+
     @Optional
     @Input
     String maintainer
@@ -349,10 +357,15 @@ class Rpm extends AbstractArchiveTask {
         sb.toString()
     }
 
-
     Directory directory(String path) {
         Directory directory = new Directory(path: path)
-        directories << directory
+        directories.add(directory)
+        directory
+    }
+
+    Directory directory(String path, String user, String group) {
+        Directory directory = new Directory(path: path, user: user, group: group)
+        directories.add(directory)
         directory
     }
 

gradle-plugin-rpm/src/main/groovy/org/xbib/gradle/plugin/rpm/RpmCopyAction.groovy

@@ -1,5 +1,6 @@
-package org.xbib.gradle.plugin
+package org.xbib.gradle.plugin.rpm
 
+import groovy.util.logging.Log
 import org.gradle.api.Project
 import org.gradle.api.file.DuplicatesStrategy
 import org.gradle.api.file.FileCopyDetails
@@ -18,7 +19,10 @@ import org.xbib.rpm.payload.Directive
 import java.nio.file.Files
 import java.nio.file.Path
 import java.nio.file.StandardOpenOption
+import java.nio.file.attribute.PosixFileAttributeView
+import java.nio.file.attribute.PosixFileAttributes
 
+@Log
 class RpmCopyAction implements CopyAction {
 
     Project project
@@ -105,8 +109,9 @@ class RpmCopyAction implements CopyAction {
             builder.addProvides(provides.packageName, provides.flags, provides.version)
         }
         for (Directory directory : task.directories) {
-            String user = directory.user ? directory.user : task.user
-            String group = directory.group ? directory.group : task.group
+            String user = directory.user ?: task.user
+            String group = directory.group ?: task.group
+            log.info("dir = " + directory.path)
             builder.addDirectory(directory.path, directory.permissions, null, user, group, directory.addParents)
         }
     }
@@ -123,20 +128,29 @@ class RpmCopyAction implements CopyAction {
     private class StreamAction implements CopyActionProcessingStreamAction {
 
         @Override
-        void processFile(FileCopyDetailsInternal fileCopyDetailsInternal) {
-            boolean addParents = task.addParentDirs != null ? task.addParentDirs : task.addParentDirs
-            Path path = extractPath(tempDir, fileCopyDetailsInternal)
-            String p = "/${fileCopyDetailsInternal.path}"
+        void processFile(FileCopyDetailsInternal details) {
+            boolean addParents = task.addParentDirs != null ? task.addParentDirs : false
+            Path path = extractPath(tempDir, details)
+            PosixFileAttributeView view = Files.getFileAttributeView(path, PosixFileAttributeView)
+            PosixFileAttributes attributes = view.readAttributes()
+            String user = task.user ?: attributes.owner().name
+            String group = task.group ?: attributes.group().name
+            String p = "/${details.path}"
             if (Files.isSymbolicLink(path)) {
                 builder.addLink(p, Files.readSymbolicLink(path).toFile().path, -1)
-            } else if (!fileCopyDetailsInternal.isDirectory()) {
-                int mode = fileCopyDetailsInternal.mode
+            } else if (!details.isDirectory()) {
+                int mode = details.mode
+                if (task.setuid) {
+                    mode |= 01000
+                } task.group
                 int dirmode = -1
+                if (task.setgid) {
+                    dirmode |= 02000
+                }
                 EnumSet<Directive> directive = makeDirective(task.fileType)
-                String user = task.user ?: task.user
-                String group = task.group ?: task.group
                 builder.addFile(p, path, mode, dirmode, directive, user, group, addParents)
             }
+            // we skip all directories
         }
     }