first jmod/jlink Hello world project, successful test

gradle-plugin-jlink/build.gradle

@@ -12,6 +12,8 @@ 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')) {

gradle-plugin-jlink/src/main/java/org/xbib/gradle/plugin/jlink/JLinkExtension.java

@@ -1,25 +1,85 @@
 package org.xbib.gradle.plugin.jlink;
 
+import org.gradle.api.Project;
 import org.gradle.api.provider.ListProperty;
 import org.gradle.api.provider.Property;
 
+import java.util.List;
+
 public class JLinkExtension {
 
-    ListProperty<String> modules;
+    private final ListProperty<String> modules;
 
-    Property<Integer> compress;
+    private final Property<Integer> compress;
 
-    Property<Boolean> stripDebug;
+    private final Property<Boolean> stripDebug;
 
-    Property<Boolean> noHeaderFiles;
+    private final Property<Boolean> noHeaderFiles;
 
-    Property<Boolean> noManPages;
+    private final Property<Boolean> noManPages;
 
-    Property<Endian> endian;
+    private final Property<Endian> endian;
 
-    enum Endian {
+    public enum Endian {
         LITTLE,
         BIG,
         NATIVE,
     }
+
+    public JLinkExtension(Project project) {
+        this.modules = project.getObjects().listProperty(String.class);
+        this.compress = project.getObjects().property(Integer.class);
+        this.stripDebug = project.getObjects().property(Boolean.class);
+        this.noHeaderFiles = project.getObjects().property(Boolean.class);
+        this.noManPages = project.getObjects().property(Boolean.class);
+        this.endian = project.getObjects().property(Endian.class);
+    }
+
+    public void setModules(List<String> modules) {
+        this.modules.set(modules);
+    }
+
+    public ListProperty<String> getModules() {
+        return modules;
+    }
+
+    public void setCompress(Integer compress) {
+        this.compress.set(compress);
+    }
+
+    public Property<Integer> getCompress() {
+        return compress;
+    }
+
+    public void setStripDebug(Boolean stripDebug) {
+        this.stripDebug.set(stripDebug);
+    }
+
+    public Property<Boolean> getStripDebug() {
+        return stripDebug;
+    }
+
+    public void setNoHeaderFiles(Boolean noHeaderFiles) {
+        this.noHeaderFiles.set(noHeaderFiles);
+    }
+
+    public Property<Boolean> getNoHeaderFiles() {
+        return noHeaderFiles;
+    }
+
+    public void setNoManPages(Boolean noManPages) {
+        this.noManPages.set(noManPages);
+    }
+
+    public Property<Boolean> getNoManPages() {
+        return noManPages;
+    }
+
+    public void setEndian(Endian endian) {
+        this.endian.set(endian);
+    }
+
+    public Property<Endian> getEndian() {
+        return endian;
+    }
 }

gradle-plugin-jlink/src/main/java/org/xbib/gradle/plugin/jlink/JLinkPlugin.java

@@ -6,8 +6,10 @@ import org.gradle.api.artifacts.Configuration;
 import org.gradle.api.attributes.Usage;
 import org.gradle.api.plugins.JavaPlugin;
 import org.gradle.api.tasks.TaskProvider;
+import org.gradle.jvm.tasks.Jar;
 
 import java.util.List;
+import java.util.Objects;
 
 public abstract class JLinkPlugin implements Plugin<Project> {
 
@@ -15,30 +17,35 @@ public abstract class JLinkPlugin implements Plugin<Project> {
     public void apply(Project project) {
         project.getPluginManager().apply(JavaPlugin.class);
         JLinkExtension extension = project.getExtensions().create("jlink", JLinkExtension.class);
-        extension.modules.convention(List.of("java.base"));
+        extension.getModules().convention(List.of("java.base"));
-        extension.compress.convention(2);
+        extension.getCompress().convention(6); // zip-6, default
-        extension.stripDebug.convention(true);
+        extension.getStripDebug().convention(true);
-        extension.noHeaderFiles.convention(true);
+        extension.getNoHeaderFiles().convention(true);
-        extension.noManPages.convention(true);
+        extension.getNoManPages().convention(true);
-        extension.endian.convention(JLinkExtension.Endian.NATIVE);
+        extension.getEndian().convention(JLinkExtension.Endian.NATIVE);
-        TaskProvider<JLinkTask> jlinkTask = project.getTasks().register("jlink", JLinkTask.class);
+        TaskProvider<Jar> jarTask = project.getTasks().named("jar", Jar.class);
+        Objects.requireNonNull(jarTask);
+        TaskProvider<JModTask> jModTask = project.getTasks().register("jmod", JModTask.class);
+        project.getTasks().withType(JModTask.class).forEach(it -> {
+            it.dependsOn(jarTask);
+        });
+        Objects.requireNonNull(jModTask);
+        TaskProvider<JLinkTask> jLinkTask = project.getTasks().register("jlink", JLinkTask.class);
         project.getTasks().withType(JLinkTask.class).forEach(it -> {
-            it.modules.set(extension.modules);
+            it.dependsOn(jModTask);
-            it.compress.set(extension.compress);
+            it.modules.set(extension.getModules());
-            it.stripDebug.set(extension.stripDebug);
+            it.compress.set(extension.getCompress());
-            it.noHeaderFiles.set(extension.noHeaderFiles);
+            it.stripDebug.set(extension.getStripDebug());
-            it.noManPages.set(extension.noManPages);
+            it.noHeaderFiles.set(extension.getNoHeaderFiles());
-            it.endian.set(extension.endian);
+            it.noManPages.set(extension.getNoManPages());
+            it.endian.set(extension.getEndian());
         });
         Configuration configuration = project.getConfigurations().create("jlink");
         configuration.setCanBeConsumed(true);
         configuration.setCanBeResolved(false);
         configuration.setVisible(false);
-        configuration.attributes(a -> {
+        configuration.attributes(a -> a.attribute(Usage.USAGE_ATTRIBUTE,
-            a.attribute(Usage.USAGE_ATTRIBUTE, project.getObjects().named(Usage.class, "jlink"));
+                project.getObjects().named(Usage.class, "jlink")));
-        });
+        configuration.outgoing(o -> o.artifact(jLinkTask.flatMap(t -> t.outputDirectory)));
-        configuration.outgoing(o -> {
-            o.artifact(jlinkTask.flatMap(t -> t.outputDirectory));
-        });
     }
 }

gradle-plugin-jlink/src/main/java/org/xbib/gradle/plugin/jlink/JLinkTask.java

@@ -1,6 +1,8 @@
 package org.xbib.gradle.plugin.jlink;
 
+import org.gradle.api.file.Directory;
 import org.gradle.api.file.DirectoryProperty;
+import org.gradle.api.logging.LogLevel;
 import org.gradle.api.plugins.JavaPluginExtension;
 import org.gradle.api.provider.ListProperty;
 import org.gradle.api.provider.Property;
@@ -9,11 +11,14 @@ import org.gradle.api.tasks.AbstractExecTask;
 import org.gradle.api.tasks.Input;
 import org.gradle.api.tasks.InputDirectory;
 import org.gradle.api.tasks.Nested;
+import org.gradle.api.tasks.Optional;
 import org.gradle.api.tasks.OutputDirectory;
+import org.gradle.api.tasks.TaskProvider;
 import org.gradle.jvm.toolchain.JavaCompiler;
 import org.gradle.jvm.toolchain.JavaToolchainService;
 import org.gradle.jvm.toolchain.JavaToolchainSpec;
 
+import javax.inject.Inject;
 import java.io.File;
 import java.io.IOException;
 import java.nio.file.FileVisitResult;
@@ -26,25 +31,32 @@ import java.util.List;
 import java.util.Locale;
 
 public class JLinkTask extends AbstractExecTask<JLinkTask> {
+
     @Nested
     Property<JavaCompiler> javaCompiler;
 
     @Input
+    @Optional
     ListProperty<String> modules;
 
     @Input
+    @Optional
     Property<Integer> compress;
 
     @Input
+    @Optional
     Property<Boolean> stripDebug;
 
     @Input
+    @Optional
     Property<Boolean> noHeaderFiles;
 
     @Input
+    @Optional
     Property<Boolean> noManPages;
 
     @Input
+    @Optional
     Property<JLinkExtension.Endian> endian;
 
     @InputDirectory
@@ -53,33 +65,54 @@ public class JLinkTask extends AbstractExecTask<JLinkTask> {
     @OutputDirectory
     DirectoryProperty outputDirectory;
 
-    public JLinkTask(Class<JLinkTask> taskType) {
+    @Inject
-        super(taskType);
+    public JLinkTask() {
+        super(JLinkTask.class);
+        this.javaCompiler = getProject().getObjects().property(JavaCompiler.class);
+        this.modules = getProject().getObjects().listProperty(String.class);
+        this.compress = getProject().getObjects().property(Integer.class);
+        this.stripDebug = getProject().getObjects().property(Boolean.class);
+        this.noHeaderFiles = getProject().getObjects().property(Boolean.class);
+        this.noManPages = getProject().getObjects().property(Boolean.class);
+        this.endian = getProject().getObjects().property(JLinkExtension.Endian.class);
+        this.modulePath = getProject().getObjects().directoryProperty();
+        this.outputDirectory = getProject().getObjects().directoryProperty();
         JavaToolchainSpec toolchain = getProject().getExtensions().getByType(JavaPluginExtension.class).getToolchain();
         JavaToolchainService service = getProject().getExtensions().getByType(JavaToolchainService.class);
-        Provider<JavaCompiler> defaultJlinkTool = service.compilerFor(toolchain);
+        javaCompiler.convention(service.compilerFor(toolchain));
-        javaCompiler.convention(defaultJlinkTool);
         modules.convention(List.of("java.base"));
-        modulePath.convention(javaCompiler.map(it -> it.getMetadata().getInstallationPath().dir("jmods")));
+        Provider<Directory> modulePathProvider = javaCompiler.map(it -> {
-        outputDirectory.convention(getProject().getLayout().getBuildDirectory().dir("jlink-jre"));
+            Directory jmods = it.getMetadata().getInstallationPath().dir("jmods");
+            if (jmods.getAsFile().exists()) {
+                return jmods;
+            } else {
+                getLogger().log(LogLevel.WARN, "directory " + jmods + " does not exist! Is jmods package installed?");
+                return null;
+            }
+        });
+        modulePath.convention(modulePathProvider);
+        outputDirectory.convention(getProject().getLayout().getBuildDirectory().dir("jlink"));
     }
 
     @Override
     public void exec() {
         setExecutable(javaCompiler.get().getMetadata().getInstallationPath().file("bin/jlink"));
-        File jlinkOutput = outputDirectory.dir("jre").get().getAsFile();
+        TaskProvider<JModTask> jmodTask = getProject().getTasks().named("jmod", JModTask.class);
+        File jlinkOutput = outputDirectory.dir("jlink-output").get().getAsFile();
         try {
-            delete(jlinkOutput.toPath());
+            createDirectory(jlinkOutput.toPath());
         } catch (IOException e) {
             throw new RuntimeException(e);
         }
         List<String> args = new ArrayList<>(List.of(
                 "--module-path",
                 modulePath.get().getAsFile().getAbsolutePath(),
+                "--module-path",
+                jmodTask.get().jmodFile.getAsFile().get().getAbsolutePath(),
                 "--add-modules",
                 String.join(",", modules.get()),
                 "--compress",
-                "${compress.get()}",
+                "zip-" + compress.get(),
                 "--output",
                 jlinkOutput.getAbsolutePath()
         ));
@@ -97,22 +130,100 @@ public class JLinkTask extends AbstractExecTask<JLinkTask> {
             args.add(endian.get().toString().toLowerCase(Locale.ROOT));
         }
         setArgs(args);
+        System.err.println( "executing " + getExecutable() + " with " + args);
         super.exec();
     }
 
-    private void delete(Path path) throws IOException {
+    public void setJavaCompiler(JavaCompiler javaCompiler) {
-        Files.walkFileTree(path, new SimpleFileVisitor<>() {
+        this.javaCompiler.set(javaCompiler);
-                    @Override
+    }
-                    public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
-                        Files.delete(dir);
-                        return FileVisitResult.CONTINUE;
-                    }
 
-                    @Override
+    public Property<JavaCompiler> getJavaCompiler() {
-                    public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
+        return javaCompiler;
-                        Files.delete(file);
+    }
-                        return FileVisitResult.CONTINUE;
+
-                    }
+    public void setModules(List<String> modules) {
-                });
+        this.modules.set(modules);
+    }
+
+    public ListProperty<String> getModules() {
+        return modules;
+    }
+
+    public void setCompress(Integer compress) {
+        this.compress.set(compress);
+    }
+
+    public Property<Integer> getCompress() {
+        return compress;
+    }
+
+    public void setStripDebug(Boolean stripDebug) {
+        this.stripDebug.set(stripDebug);
+    }
+
+    public Property<Boolean> getStripDebug() {
+        return stripDebug;
+    }
+
+    public void setNoHeaderFiles(Boolean noHeaderFiles) {
+        this.noHeaderFiles.set(noHeaderFiles);
+    }
+
+    public Property<Boolean> getNoHeaderFiles() {
+        return noHeaderFiles;
+    }
+
+    public void setNoManPages(Boolean noManPages) {
+        this.noManPages.set(noManPages);
+    }
+
+    public Property<Boolean> getNoManPages() {
+        return noManPages;
+    }
+
+    public void setEndian(JLinkExtension.Endian endian) {
+        this.endian.set(endian);
+    }
+
+    public Property<JLinkExtension.Endian> getEndian() {
+        return endian;
+    }
+
+    public void setModulePath(Directory modulePath) {
+        this.modulePath.set(modulePath);
+    }
+
+    public DirectoryProperty getModulePath() {
+        return modulePath;
+    }
+
+    public void setOutputDirectory(Directory outputDirectory) {
+        this.outputDirectory.set(outputDirectory);
+    }
+
+    public DirectoryProperty getOutputDirectory() {
+        return outputDirectory;
+    }
+
+    private static void createDirectory(Path path) throws IOException {
+        if (Files.exists(path)) {
+            Files.walkFileTree(path, new SimpleFileVisitor<>() {
+                @Override
+                public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
+                    Files.delete(dir);
+                    return FileVisitResult.CONTINUE;
+                }
+
+                @Override
+                public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
+                    Files.delete(file);
+                    return FileVisitResult.CONTINUE;
+                }
+            });
+            Files.delete(path);
+        }
+        // create only parent, jlink aborts if output directory exists
+        Files.createDirectories(path.getParent());
     }
 }

gradle-plugin-jlink/src/main/java/org/xbib/gradle/plugin/jlink/JModTask.java

@@ -0,0 +1,118 @@
+package org.xbib.gradle.plugin.jlink;
+
+import org.gradle.api.file.RegularFile;
+import org.gradle.api.file.RegularFileProperty;
+import org.gradle.api.plugins.JavaPluginExtension;
+import org.gradle.api.provider.Property;
+import org.gradle.api.tasks.AbstractExecTask;
+import org.gradle.api.tasks.InputFile;
+import org.gradle.api.tasks.Nested;
+import org.gradle.api.tasks.OutputFile;
+import org.gradle.api.tasks.TaskProvider;
+import org.gradle.jvm.tasks.Jar;
+import org.gradle.jvm.toolchain.JavaCompiler;
+import org.gradle.jvm.toolchain.JavaToolchainService;
+import org.gradle.jvm.toolchain.JavaToolchainSpec;
+
+import javax.inject.Inject;
+import java.io.IOException;
+import java.nio.file.FileVisitResult;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.SimpleFileVisitor;
+import java.nio.file.attribute.BasicFileAttributes;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+public class JModTask extends AbstractExecTask<JModTask> {
+
+    @Nested
+    Property<JavaCompiler> javaCompiler;
+
+    @InputFile
+    RegularFileProperty jarFile;
+
+    @OutputFile
+    RegularFileProperty jmodFile;
+
+    @Inject
+    public JModTask() {
+        super(JModTask.class);
+        javaCompiler = getProject().getObjects().property(JavaCompiler.class);
+        JavaToolchainSpec toolchain = getProject().getExtensions().getByType(JavaPluginExtension.class).getToolchain();
+        JavaToolchainService service = getProject().getExtensions().getByType(JavaToolchainService.class);
+        javaCompiler.convention(service.compilerFor(toolchain));
+        jarFile = getProject().getObjects().fileProperty();
+        TaskProvider<Jar> jarTask = getProject().getTasks().named("jar", Jar.class);
+        Objects.requireNonNull(jarTask);
+        jarFile.convention(jarTask.get().getArchiveFile());
+        jmodFile = getProject().getObjects().fileProperty();
+        jmodFile.convention(getProject().getLayout().getBuildDirectory()
+                .dir("jmod").get().file(getProject().getName() + ".jmod"));
+    }
+
+    @Override
+    public void exec() {
+        setExecutable(javaCompiler.get().getMetadata().getInstallationPath().file("bin/jmod"));
+        try {
+            createDirectory(jmodFile.getAsFile().get().toPath());
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+        List<String> args = new ArrayList<>(List.of(
+                "create",
+                "--class-path",
+                jarFile.get().getAsFile().getAbsolutePath(),
+                jmodFile.get().getAsFile().getAbsolutePath()
+        ));
+        setArgs(args);
+        System.err.println( "executing " + getExecutable() + " with " + args);
+        super.exec();
+    }
+
+    public void setJavaCompiler(JavaCompiler javaCompiler) {
+        this.javaCompiler.set(javaCompiler);
+    }
+
+    public Property<JavaCompiler> getJavaCompiler() {
+        return javaCompiler;
+    }
+
+    public void setJarFile(RegularFile jarFile) {
+        this.jarFile.set(jarFile);
+    }
+
+    public RegularFileProperty getJarFile() {
+        return jarFile;
+    }
+
+    public void setJmodFile(RegularFile jmodFile) {
+        this.jmodFile.set(jmodFile);
+    }
+
+    public RegularFileProperty getJmodFile() {
+        return jmodFile;
+    }
+
+    private static void createDirectory(Path path) throws IOException {
+        if (Files.exists(path)) {
+            Files.walkFileTree(path, new SimpleFileVisitor<>() {
+                @Override
+                public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
+                    Files.delete(dir);
+                    return FileVisitResult.CONTINUE;
+                }
+
+                @Override
+                public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
+                    Files.delete(file);
+                    return FileVisitResult.CONTINUE;
+                }
+            });
+            Files.delete(path);
+        }
+        // create only parent
+        Files.createDirectories(path.getParent());
+    }
+}

gradle-plugin-jlink/src/test/groovy/org/xbib/gradle/plugin/jlink/JLinkGradleBuild.groovy

@@ -0,0 +1,110 @@
+package org.xbib.gradle.plugin.jlink
+
+import org.gradle.testkit.runner.BuildResult
+import org.gradle.testkit.runner.GradleRunner
+
+class JLinkGradleBuild {
+
+    final File projectDir
+    final File settingsFile
+    final File appBuildFile
+    final File appModuleInfoFile
+    final File libBuildFile
+    final File libModuleInfoFile
+
+    final String gradleVersionUnderTest = System.getProperty('gradleVersionUnderTest')
+
+    JLinkGradleBuild() {
+        this.projectDir = createDirectory('build/jlink-gradle-build')
+        this.settingsFile = tapFile('settings.gradle')
+        this.appBuildFile = tapFile('app/build.gradle')
+        this.appModuleInfoFile = tapFile('app/src/main/java/module-info.java')
+        this.libBuildFile = tapFile('lib/build.gradle')
+        this.libModuleInfoFile = tapFile('lib/src/main/java/module-info.java')
+        settingsFile << '''
+            dependencyResolutionManagement { repositories.mavenCentral() }
+            includeBuild(".")
+            rootProject.name = "test-project"
+            include("app", "lib")
+        '''
+        appBuildFile << '''
+            plugins {
+                id("org.xbib.gradle.plugin.jlink")
+            }
+            group = "org.example"
+            java {
+              toolchain {
+                languageVersion.set(JavaLanguageVersion.of(21))
+              }
+            }            
+        '''
+        tapFile("app/src/main/java/org/example/app/Main.java") << '''
+            package org.example.app;            
+            public class Main {
+                public static void main(String... args) {
+                  System.out.println("Hello world");
+                }
+            }
+        '''
+        tapFile("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() {
+                    Main main = new Main();
+                    main.main();
+                }
+            }
+        '''
+        libBuildFile << '''
+            plugins {
+                id("org.xbib.gradle.plugin.jlink")
+            }
+            group = "org.example"
+        '''
+    }
+
+    static File createDirectory(String path) {
+        File f = new File(path)
+        if (f.exists()) {
+            f.deleteDir()
+        }
+        f.mkdirs()
+        f
+    }
+
+    File tapFile(String path) {
+        new File(projectDir, path).tap {
+            it.getParentFile().mkdirs()
+        }
+    }
+
+    static boolean runsOnLinux() {
+        hostOs().contains('linux')
+    }
+
+    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))
+                .with {
+                    gradleVersionUnderTest ? it.withGradleVersion(gradleVersionUnderTest) : it
+                }
+    }
+}

gradle-plugin-jlink/src/test/groovy/org/xbib/gradle/plugin/jlink/JLinkTest.groovy

@@ -0,0 +1,40 @@
+package org.xbib.gradle.plugin.jlink
+
+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.jlink.JLinkGradleBuild.runsOnLinux
+
+class JLinkTest extends Specification {
+
+    @Delegate
+    JLinkGradleBuild build = new JLinkGradleBuild()
+
+    def "can use jlink plugin with success=#success"() {
+        given:
+        def taskToRun = ":app:jlink"
+        appBuildFile << """
+            jlink {
+              modules.set(List.of("org.example.app"))
+            }
+        """
+        appModuleInfoFile << """
+            module org.example.app {
+               exports org.example.app;
+            }
+        """
+
+        when:
+        def result = success ? build(taskToRun) : fail(taskToRun)
+
+        then:
+        println result.output
+        result.task(taskToRun).outcome == (success ? SUCCESS : FAILED)
+        success
+
+        where:
+        label    | os      | success
+        'fedora' | 'linux' | runsOnLinux()
+    }
+}