test/jdk/tools/jlink/ExplodedModuleNameTest.java

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import java.io.IOException;
import java.nio.file.attribute.BasicFileAttributes;
import java.nio.file.Files;
import java.nio.file.FileVisitResult;
import java.nio.file.Path;
import java.nio.file.SimpleFileVisitor;
import java.util.spi.ToolProvider;

import tests.Helper;
import tests.JImageGenerator;
import tests.Result;

/*
 * @test
 * @bug 8192986
 * @summary Inconsistent handling of exploded modules in jlink
 * @library ../lib
 * @modules java.base/jdk.internal.jimage
 *          jdk.jlink/jdk.tools.jlink.internal
 *          jdk.jlink/jdk.tools.jmod
 *          jdk.jlink/jdk.tools.jimage
 *          jdk.compiler
 * @build tests.*
 * @run main ExplodedModuleNameTest
 */
public class ExplodedModuleNameTest {
    static final ToolProvider JLINK_TOOL = ToolProvider.findFirst("jlink")
        .orElseThrow(() ->
            new RuntimeException("jlink tool not found")
        );

    public static void main(String[] args) throws Exception {
        Helper helper = Helper.newHelper();
        if (helper == null) {
            System.err.println("Test not run");
            return;
        }

        // generate a new exploded module
        String modName = "mod8192986";
        Path modDir = helper.generateDefaultExplodedModule(modName).getFile();
        // rename the module containing directory
        Path renamedModDir = modDir.resolveSibling("modified_mod8192986");
        // copy the content from original directory to modified name directory
        copyDir(modDir, renamedModDir);

        Path outputDir = helper.createNewImageDir("image8192986");
        JImageGenerator.getJLinkTask()
                .modulePath(renamedModDir.toAbsolutePath().toString())
                .output(outputDir)
                .addMods(modName)
                .launcher(modName + "=" + modName + "/" + modName +".Main")
                .call().assertSuccess();
    }

    private static void copyDir(Path srcDir, Path destDir) throws IOException {
        Files.walkFileTree(srcDir, new SimpleFileVisitor<Path>() {
            @Override
            public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException {
                Path target = destDir.resolve(srcDir.relativize(dir));
                Files.createDirectory(target);
                return FileVisitResult.CONTINUE;
            }

            @Override
            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
                Files.copy(file, destDir.resolve(srcDir.relativize(file)));
                return FileVisitResult.CONTINUE;
            }
        });
    }
}