Problems when creating Release Distributable for Desktop with Proguard

[PMARZV]

When creating an optimized and ofuscated release distributable in Compose Desktop, there seems to be problems with JNA. Could it be possible if you created a proguard rules file for the library?

[vinceglb]

Thanks for reporting this!

I'm trying to reproduce the crash but for now I didn't succeed. Here are the steps I tried:

• On Windows 11
• By reading the documentation, I tried to activate Obfuscation because it is disable by default and ProGuard's optimizations are enabled by default
• I modified the sample-compose build.gradle with these lines

compose.desktop {
    application {
        mainClass = "MainKt"

        nativeDistributions {
            targetFormats(TargetFormat.Dmg, TargetFormat.Msi, TargetFormat.Deb)
            packageName = "io.github.vinceglb.sample.compose"
            packageVersion = "1.0.0"
        }

        // New here
        buildTypes.release.proguard {
            obfuscate.set(true)
        }
    }
}

• I build the sample using ./gradew samples:sample-compose:composeApp:packageMsi
• I installed the application on my windows

But the app worked like expected, it didn't crash. Am I missing something?

Are you able to reproduce the crash using the sample-compose?

[PMARZV]

Packaging with Msi doesnt crash (proguardReleaseJars gradle task doesnt seem to be called when packageMsi is ran, so the package isnt being optimized or ofuscated, i guess). Thats why i said run the task createReleaseDistributable (which is calling proguardReleaseJars gradle task and crashing the sample-compose for me at least).

This is the error (edit. i forgot to mentioned that this is only happening with singlefilepicker) im getting without adding nothing in a proguard.pro file in compose-sample

and the errors above mentioned (in the first comment) come from a proguard file i was tinkering with when trying to solve the problem:

-keep class com.sun.jna.** { *; }
-keep class com.sun.jna.platform.** { *; }

# Preserve structure field order and names
-keepclassmembers class com.sun.jna.Structure {
    java.util.List getFieldOrder();
}

# Ensure all fields in Structure$FFIType are preserved
-keepclassmembers class com.sun.jna.Structure$FFIType {
    <fields>;
}

# Ensure all fields in io.github.vinceglb.filekit.core.platform.windows.win32.a are preserved
-keepclassmembers class io.github.vinceglb.filekit.core.platform.windows.win32.a {
    <fields>;
    protected java.util.List getFieldOrder();
}

but even with the bare sample you have tested it fails with the java lang string error

[vinceglb]

I'm still trying to reproduce the crash. Without creating a proguard file, I can even build sample-compose using createReleaseDistributable on Windows and macOS due to proguard warnings.

On macOS, I manage to build and launch correctly the sample-compose by creating this proguard file:

-dontwarn kotlinx.datetime.**
-dontwarn org.slf4j.**
-keep class org.slf4j.**{ *; }
-keep class com.sun.jna.* { *; }
-keep class * implements com.sun.jna.* { *; }

But on Windows, I'm faced with more 100 000 proguard warnings. I tried the same proguard file and experiment with it but I failed to build the sample-compose app.

Are you using a proguard file to build the sample-compose app on Windows (even if it crashes at launch)?

[PMARZV]

just a proguard file with -ignorewarnings. if not it was not even working, exactly (i forgot to say it sorry). just tested your proguard file plus adding -ignorewarnings to be able to launch it on windows but it still fails when launching single file picker Error:

[vinceglb]

Thanks for your help, I'm now able to reproduce when using proguard and obfuscate.set(true).

I've been trying for 3 hours, but I don't find any solution for now... I have no idea what's going on here. I'll probably try later