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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 *

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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

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 *

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 * 2 along with this work; if not, write to the Free Software Foundation,

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 *

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/*

 * @test

 * @bug 8177471

 * @summary  jlink should use the version from java.base.jmod to find modules

 * @modules java.base/jdk.internal.module

 * @library /test/lib

 * @build jdk.test.lib.process.* CheckRuntimeVersion

 * @run testng/othervm JLinkMRJavaBaseVersionTest

 */

import java.io.ByteArrayInputStream;

import java.io.File;

import java.io.IOException;

import java.lang.module.ModuleFinder;

import java.lang.module.ModuleReference;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.util.List;

import java.util.jar.JarFile;

import java.util.spi.ToolProvider;

import java.util.stream.Collectors;

import java.util.stream.Stream;

import jdk.internal.module.ModulePath;

import jdk.test.lib.process.ProcessTools;

import org.testng.Assert;

import org.testng.annotations.BeforeClass;

import org.testng.annotations.Test;

public class JLinkMRJavaBaseVersionTest {

    private static final ToolProvider JAR_TOOL = ToolProvider.findFirst("jar")

            .orElseThrow(() -> new RuntimeException("jar tool not found"));

    private static final ToolProvider JAVAC_TOOL = ToolProvider.findFirst("javac")

            .orElseThrow(() -> new RuntimeException("javac tool not found"));

    private static final ToolProvider JLINK_TOOL = ToolProvider.findFirst("jlink")

            .orElseThrow(() -> new RuntimeException("jlink tool not found"));

    private static final Path javaHome = Paths.get(System.getProperty("java.home"));

    // resource text for version 9

    private byte[] resource9 = ("9 resource file").getBytes();

    // resource text for current version

    private byte[] resource = (Runtime.version().major() + " resource file").getBytes();

    static Path getJmods() {

        Path jmods = Paths.get(System.getProperty("java9.home", javaHome.toString())).resolve("jmods");

        if (Files.notExists(jmods)) {

            throw new RuntimeException(jmods + " not found");

        }

        return jmods;

    }

    @BeforeClass

    public void initialize() throws IOException {

        Path srcdir = Paths.get(System.getProperty("test.src"));

        // create class files from source

        Path base = srcdir.resolve("base");

        Path mr9 = Paths.get("mr9");

        javac(base, mr9, base.toString());

        // current version

        Path rt = srcdir.resolve("rt");

        Path rtmods = Paths.get("rtmods");

        javac(rt, rtmods, rt.toString());

        // build multi-release jar file with different module-info.class

        String[] args = {

                "-cf", "m1.jar",

                "-C", rtmods.resolve("m1").toString(), ".",

                "--release ", "9",

                "-C", mr9.resolve("m1").toString(), "."

        };

        JAR_TOOL.run(System.out, System.err, args);

    }

    private void javac(Path source, Path destination, String srcpath) throws IOException {

        String[] args = Stream.concat(

                Stream.of("-d", destination.toString(), "--release", "9",

                          "--module-source-path", srcpath),

                Files.walk(source)

                     .map(Path::toString)

                     .filter(s -> s.endsWith(".java"))

        ).toArray(String[]::new);

        int rc = JAVAC_TOOL.run(System.out, System.err, args);

        Assert.assertEquals(rc, 0);

    }

    @Test

    public void basicTest() throws Throwable {

        if (Files.notExists(javaHome.resolve("lib").resolve("modules"))) {

            // exploded image

            return;

        }

        Runtime.Version version = targetRuntimeVersion();

        System.out.println("Testing jlink with " + getJmods() + " of target version " + version);

        // use jlink to build image from multi-release jar

        // validate runtime image

        Path java = Paths.get("myimage", "bin", "java");

        ProcessTools.executeProcess(java.toString(), "-m", "m1/p.Main");

        // validate the image linked with the proper MR version

            ProcessTools.executeProcess(java.toString(), "-cp", System.getProperty("test.classes"),

                                        "CheckRuntimeVersion", String.valueOf(version.major()),

                                        "java.base", "m1")

                .shouldHaveExitValue(0);

        }

    }

    private Runtime.Version targetRuntimeVersion() {

        ModuleReference mref = ModulePath.of(Runtime.version(), true, getJmods())

            .find("java.base")

            .orElseThrow(() -> new RuntimeException("java.base not found from " + getJmods()));

        return Runtime.Version.parse(mref.descriptor().version().get().toString());

    }

        List<String> args = List.of("--output", image,

                                    "--add-modules", "m1",

                                    "--module-path",

                                    getJmods().toString() + File.pathSeparator + jar);

        System.out.println("jlink " + args.stream().collect(Collectors.joining(" ")));

        int exitCode = JLINK_TOOL.run(System.out, System.err, args.toArray(new String[0]));

    }

}