Setting shortenCommandLine "argfile" should not nest a user-passed argfile inside an argfile

Comienza con la configuración de lanzamiento de Java usando vmArgs, shortenCommandLine y el archivo myargs creado por el usuario, y luego reproduce el fallo con los pasos proporcionados de Hello World. Rastrea cómo el depurador construye el argfile temporal; la tarea está terminada cuando el programa se ejecuta sin anidar el argfile pasado por el usuario.

When setting shortenCommandLine to argfile (or setting to auto and then triggering the argfile behavior with a long command), VS Code will always put any vmArgs inside an argfile, even if the only VM arg is another argfile. This breaks run configurations that pass a user-generated argfile that still trigger the automatic CLI shortening behavior such as a very long classpath, since argfiles cannot be nested.

Environment

• Operating System: Linux
• JDK version: 17
• Visual Studio Code version: 1.84.0-insider (60182c7e1a666961ded4d0319c154f52d85daf30)
• Java extension version: v0.25.15
• Java Debugger extension version: v0.54.0

Steps To Reproduce

1. Create a trivial Java project ex. a Hello World main method
2. Create an argfile myargs
3. Create launch.json with a corresponding run configuration for the main method. Set shortenCommandLine to argfile to force the argfile behavior (should be equivalent to setting auto and then loading a very long classpath).

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "type": "java",
            "name": "Hello",
            "request": "launch",
            "mainClass": "Hello",
            "vmArgs": "@myargs",
            "shortenCommandLine": "argfile"
        }
    ]
}

4. Attempt to run the main method - this should fail.

Sample project: test-argfile.tar.gz

Current Result

$  /usr/bin/env /path/to/jdk @/tmp/cp_7ifzraqswz8cni6w2z8m6nw3w.argfile Hello 
Error: Could not find or load main class @myargs
Caused by: java.lang.ClassNotFoundException: @myargs

/tmp/cp_7ifzraqswz8cni6w2z8m6nw3w.argfile contents:

@myargs -XX:+ShowCodeDetailsInExceptionMessages -cp "/home/justinw/.vscode-server-insiders/data/User/workspaceStorage/-2d922411/redhat.java/jdt_ws/test-argfile_31bc6c61/bin"

Expected Result

Program should execute and argfiles should not be nested

Additional Informations