GraalVM CE 21: java.nio.file.InvalidPathException

Dockerfile

FROM ghcr.io/graalvm/graalvm-community:21 AS build

WORKDIR /app
COPY NioPath.java .
RUN javac NioPath.java && native-image -Dsun.jnu.encoding=UTF-8 NioPath

FROM debian:12-slim AS production
COPY --from=build /app/niopath /bin/niopath
CMD ["/bin/niopath", "àéïõû.txt"]

NioPath.java

import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.charset.Charset;
import java.nio.ByteBuffer;
import java.io.File;

public class NioPath {
  public static void main(String[] args) {
    test("UTF-8", args[0]);
    test(System.getProperty("file.encoding"), args[0]);
    test(System.getProperty("sun.jnu.encoding"), args[0]);
    test(System.getProperty("sun.jnu.encoding"), "àéïõûy.txt");

    // throws java.nio.file.InvalidPathException
    try { System.out.println(Paths.get(args[0])); }
    catch (Throwable th) { System.out.println(th); }

    // ok
    try { System.out.println(new File(args[0])); }
    catch (Throwable th) { System.out.println(th); }

    // throws java.nio.file.InvalidPathException
    try { System.out.println(Paths.get(new File(args[0]).toURI())); }
    catch (Throwable th) { System.out.println(th); }

    // throws java.nio.file.InvalidPathException
    try { System.out.println(new File(args[0]).toPath()); }
    catch (Throwable th) { System.out.println(th); }
  }

  private static void test(String charsetName, String value) {
    System.out.println("testing with charset: " + charsetName);
    Charset charset = Charset.forName(charsetName);
    ByteBuffer encoded = charset.encode(value);
    System.out.print("encoded: ");
    while (encoded.hasRemaining()) {
      System.out.print(Integer.toHexString(encoded.get() & 0xff));
    }
    System.out.print("\n");
  }
}

I think I just encountered this problem. Did you ever find a solution for GraalVM native images properly accepting encoding?
No matter what I pass to my container, it seems sun.jnu.encoding is always POSIX

You need to give an encoding during compilation of the image instead of providing it afterward

Ignoring the fact that this command is generated, it does look correct to me:

native-image --no-fallback -H:+StaticExecutableWithDynamicLibC -march=compatibility -H:+AddAllCharsets -Dsun.jnu.encoding=UTF-8 -Dfile.encoding=UTF-8 -H:Name=/layers/paketo-buildpacks_native-image/native-image/com.github.schaka.janitorr.JanitorrApplicationKt -cp /workspace:/workspace/BOOT-INF/classes:/workspace/BOOT-INF/lib/feign-jackson-13.1.jar:/workspace/BOOT-INF/lib/spring-boot-actuator-autoconfigure-3.4.0-M3.jar:/workspace/BOOT-INF/lib/jackson-datatype-jdk8-2.17.2.jar:/workspace/BOOT-INF/lib/jackson-datatype-jsr310-2.17.2.jar:/workspace/BOOT-INF/lib/jackson-module-parameter-names-2.17.2.jar:/workspace/BOOT-INF/lib/jackson-databind-2.17.2.jar:/workspace/BOOT-INF/lib/jackson-annotations-2.17.2.jar:/workspace/BOOT-INF/lib/jackson-core-2.17.2.jar:/workspace/BOOT-INF/lib/jackson-module-kotlin-2.17.2.jar:/workspace/BOOT-INF/lib/kotlin-reflect-2.0.20.jar:/workspace/BOOT-INF/lib/kotlinx-coroutines-core-jvm-1.8.1.jar:/workspace/BOOT-INF/lib/kotlin-stdlib-2.0.20.jar:/workspace/BOOT-INF/lib/caffeine-3.1.8.jar:/workspace/BOOT-INF/lib/feign-httpclient-13.1.jar:/workspace/BOOT-INF/lib/feign-core-13.1.jar:/workspace/BOOT-INF/lib/jcl-over-slf4j-2.0.16.jar:/workspace/BOOT-INF/lib/annotations-23.0.0.jar:/workspace/BOOT-INF/lib/spring-webmvc-6.2.0-RC1.jar:/workspace/BOOT-INF/lib/spring-web-6.2.0-RC1.jar:/workspace/BOOT-INF/lib/spring-context-support-6.2.0-RC1.jar:/workspace/BOOT-INF/lib/micrometer-jakarta9-1.14.0-M3.jar:/workspace/BOOT-INF/lib/spring-boot-autoconfigure-3.4.0-M3.jar:/workspace/BOOT-INF/lib/spring-boot-actuator-3.4.0-M3.jar:/workspace/BOOT-INF/lib/spring-boot-3.4.0-M3.jar:/workspace/BOOT-INF/lib/spring-context-6.2.0-RC1.jar:/workspace/BOOT-INF/lib/micrometer-core-1.14.0-M3.jar:/workspace/BOOT-INF/lib/micrometer-observation-1.14.0-M3.jar:/workspace/BOOT-INF/lib/checker-qual-3.37.0.jar:/workspace/BOOT-INF/lib/error_prone_annotations-2.21.1.jar:/workspace/BOOT-INF/lib/httpclient-4.5.14.jar:/workspace/BOOT-INF/lib/logback-classic-1.5.8.jar:/workspace/BOOT-INF/lib/log4j-to-slf4j-2.24.0.jar:/workspace/BOOT-INF/lib/jul-to-slf4j-2.0.16.jar:/workspace/BOOT-INF/lib/slf4j-api-2.0.16.jar:/workspace/BOOT-INF/lib/jakarta.annotation-api-2.1.1.jar:/workspace/BOOT-INF/lib/spring-aop-6.2.0-RC1.jar:/workspace/BOOT-INF/lib/spring-beans-6.2.0-RC1.jar:/workspace/BOOT-INF/lib/spring-expression-6.2.0-RC1.jar:/workspace/BOOT-INF/lib/spring-core-6.2.0-RC1.jar:/workspace/BOOT-INF/lib/snakeyaml-2.3.jar:/workspace/BOOT-INF/lib/tomcat-embed-websocket-10.1.30.jar:/workspace/BOOT-INF/lib/tomcat-embed-core-10.1.30.jar:/workspace/BOOT-INF/lib/tomcat-embed-el-10.1.30.jar:/workspace/BOOT-INF/lib/micrometer-commons-1.14.0-M3.jar:/workspace/BOOT-INF/lib/httpcore-4.4.16.jar:/workspace/BOOT-INF/lib/commons-logging-1.2.jar:/workspace/BOOT-INF/lib/commons-codec-1.17.1.jar:/workspace/BOOT-INF/lib/spring-jcl-6.2.0-RC1.jar:/workspace/BOOT-INF/lib/HdrHistogram-2.2.2.jar:/workspace/BOOT-INF/lib/LatencyUtils-2.0.3.jar:/workspace/BOOT-INF/lib/logback-core-1.5.8.jar:/workspace/BOOT-INF/lib/log4j-api-2.24.0.jar com.github.schaka.janitorr.JanitorrApplicationKt

Is there really no solution for changing the default encoding of a native image to UTF-8 in such a way that Path.of works?