Add pro guard optimize flag

[AlexeyTsvetkov]

ProGuard's optimizations are enabled by default. To disable them, set the following property via Gradle DSL:

compose.desktop {
    application {
        buildTypes.release.proguard {
            optimize.set(false)
        }
    }
}

[igordmn]

When I locallly switched to this version, I encountered other crashes. CI seems also can't build it.

It seeems switching to this version isn't easy.

[EchoEllet]

When I locallly switched to this version, I encountered other crashes. CI seems also can't build it.

It seeems switching to this version isn't easy.

Fixed with:

-keep class androidx.compose.runtime.** { *; }
-keep class kotlinx.coroutines.** { *; }

This will exclude Kotlinx coroutines from minimization. The bundle size will be 29.4 MB for the example desktop app on the macOS Apple silicon uber JAR file, previously 28.3 MB with the runtime error.

Tested with Compose 1.6.10, Proguard 7.5.0, and Kotlin 2.0.0 with a project created by kmp.jetbrains.com

The Kotlinx coroutines' Proguard rules seem to be a bit outdated, I couldn't get it working with Proguard without ignoring the warnings from kotlix.coroutines on blank Kotlin/JVM project on latest version of Proguard (7.5.0) and Kotlin (2.0.0)

I suggest excluding it from minimization to not have unexpected runtime errors for now.

[mipastgt]

Also lifting the default to 7.5.0 seems to be a must because it is the only version which is compatible with Kotlin 2.0.0.

[mipastgt]

I have my own projects running that way already. My comment was meant as a hint to Jetbrains because at the moment building desktop applications with Kotlin 2.0.0 is broken by default.