[native-image] how to compile with jar dependencies? ("Main entry point class not found")

[jgranduel]

Hi,

sorry if this is written somewhere, but I have not been able to compile a simple program with dependencies.,
My env is Win10x64, graalvm-19.3.0 as described in #1886 .

native-image.cmd -cp ".;./dependency.jar" MyCls
[A:31264]    classlist:   1,690.56 ms
Error: Main entry point class './dependency.jar' not found.
Error: Use -H:+ReportExceptionStackTraces to print stacktrace of underlying exception
Error: Image build request failed with exit status 1

//tried with my own test lib and with [vavr](https://www.vavr.io/) for instance
>javac -cp ".;./vavr-1.0.0-alpha-3.jar" C.java
> java -cp ".;./vavr-1.0.0-alpha-3.jar" C
....OK

>native-image.cmd -cp ".;./vavr-1.0.0-alpha-3.jar" C
[C:43276]    classlist:   1,675.54 ms
Error: Main entry point class './vavr-1.0.0-alpha-3.jar' not found.
Error: Use -H:+ReportExceptionStackTraces to print stacktrace of underlying exception
Error: Image build request failed with exit status 1

>native-image.cmd -cp ".;./vavr-1.0.0-alpha-3.jar" C "-H:+ReportExceptionStackTraces"
[C:42452]    classlist:   1,644.75 ms
Error: Main entry point class './vavr-1.0.0-alpha-3.jar' not found.
com.oracle.svm.core.util.UserError$UserException: Main entry point class './vavr-1.0.0-alpha-3.jar' not found.
at com.oracle.svm.core.util.UserError.abort(UserError.java:65)
at com.oracle.svm.hosted.NativeImageGeneratorRunner
          .buildImage(NativeImageGeneratorRunner.java:262)
 at com.oracle.svm.hosted.NativeImageGeneratorRunner
          .build(NativeImageGeneratorRunner.java:454)
at com.oracle.svm.hosted.NativeImageGeneratorRunner
          .main(NativeImageGeneratorRunner.java:115)
at com.oracle.svm.hosted.NativeImageGeneratorRunner$JDK9Plus
          .main(NativeImageGeneratorRunner.java:479)
Error: Image build request failed with exit status 1

But it might not be the way to do it? I tried with a command taken in graalvm doc $GRAALVM_HOME/bin/native-image -cp ./target/mixed-code-hello-world-1.0-SNAPSHOT.jar -H:Name=helloworld -H:Class=hello.JavaHello -H:+ReportUnsupportedElementsAtRuntime --allow-incomplete-classpath . I also tried to build a jar, but again I got the entry point issue.

Thanks in advance (and for completing the documentation if needed).
Best regards

[jgranduel]

I have been able to compile the code into exe by dumbly unzipping the dependency and then rebuilding a jar with the dependency inside.

> jar xvf dependency.jar
> jar cfe my.jar Main ./Main.class dependencyFolder
> native-image.cmd -jar my.jar
> ./my.exe

So, the dependency is not the cause. Is this process already included in native-image.cmd when using -cp as of graalvm-19.3.0 ?
Thanks

[ghost]

@jgranduel,
I tried your example and it works well in cmd and in "x64 Native Tools Command Prompt for VS 2017" (the same cmd).
Here is a code of Hello.java:

import io.vavr.control.Try;

public class Hello {
    public static void main(String[] args) {
        int x = 10;
        int y = 0;
        int defaultValue = 5;
        Integer result = Try.of(() -> (x / y))
                .getOrElse(defaultValue);
        System.out.println(result);
    }
}

And the commands:

**********************************************************************
** Visual Studio 2017 Developer Command Prompt v15.9.18
** Copyright (c) 2017 Microsoft Corporation
**********************************************************************
[vcvarsall.bat] Environment initialized for: 'x64'

C:\Program Files (x86)\Microsoft Visual Studio\2017\Community>D:

D:\>cd dev\projects\vavr-example

D:\dev\projects\vavr-example>set JAVA_HOME=D:\dev\sdk\graalvm-ce-java11-19.3.0

D:\dev\projects\vavr-example>%JAVA_HOME%\bin\javac -cp vavr-0.10.2.jar Hello.java

D:\dev\projects\vavr-example>%JAVA_HOME%\bin\java -cp .;vavr-0.10.2.jar Hello
5

D:\dev\projects\vavr-example>%JAVA_HOME%\bin\native-image -cp ".;vavr-0.10.2.jar" Hello
[hello:2872]    classlist:   1,104.46 ms
[hello:2872]        (cap):   2,730.45 ms
[hello:2872]        setup:   3,752.05 ms
[hello:2872]   (typeflow):   3,755.56 ms
[hello:2872]    (objects):   3,500.41 ms
[hello:2872]   (features):     164.81 ms
[hello:2872]     analysis:   7,585.20 ms
[hello:2872]     (clinit):     105.90 ms
[hello:2872]     universe:     322.53 ms
[hello:2872]      (parse):     424.18 ms
[hello:2872]     (inline):   1,147.42 ms
[hello:2872]    (compile):   3,528.94 ms
[hello:2872]      compile:   5,401.95 ms
[hello:2872]        image:     533.08 ms
[hello:2872]        write:     519.57 ms
[hello:2872]      [total]:  19,383.30 ms

D:\dev\projects\vavr-example>hello.exe
5

[jgranduel]

@jbreathe
Thank you very much for taking the time to test on Windows. I thought I had understood how to set the environment in PowerShell, but not fully yet. The message about the "Entry Point" was misleading for me. I haven't been able to compile your code without switching to cmd.exe and running C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\Common7\Tools\VsMSBuildCmd.bat (VS 2019) from there. Still frustrating from PowerShell but happy to compile the basic example. I can speak about GraalVM aound. Cheers.

[pejovica]

Closing as resolved.