I'm trying the KMP/CMP setup within IntelliJ with ...

# multiplatform

[Olivier Patry]

I'm trying the KMP/CMP setup within IntelliJ with the incubating new Multiplatform plugin.
I have a working project for Android, Desktop and recently iOS.
When running the project from Xcode, it works.
When running from IntelliJ using the Xcode app launcher, it launches but crashes right away.

"/Users/.../Library/Caches/JetBrains/IdeaIC2025.1/DerivedData/MyApp-fgmdywopfclxqobcsnyttiffrkhx/Build/Products/Debug-iphonesimulator/MyApp.app"
Uncaught Kotlin exception: org.jetbrains.compose.resources.MissingResourceException: Missing resource with path: /Users/.../Library/Developer/CoreSimulator/Devices/5B4A74A8-04EE-4EE6-9249-2FB5E12CF7B8/data/Containers/Bundle/Application/E48DDD44-7B50-4301-AEA8-5EAEB29802EF/MyApp.app/compose-resources/composeResources/my.package.resources/values/strings.commonMain.cvr

This is a multimodular Gradle setup if that matters.
I tried forcing res generation somehow without luck

compose.resources {
    publicResClass = true
    packageOfResClass = "my.package.resources"
    generateResClass = always
}

Anyway, I have the feeling that the Xcode/iOS sim launcher doesn't build stuff like embedAndSignAppleFrameworkForXcode does and maybe not even building anything at all…
What is the impact of OVERRIDE_KOTLIN_BUILD_IDE_SUPPORTED=YES in IntelliJ?

I do have my-module-shared/build/processedResources/iosSimulatorArm64/main/composeResources/my.package.resources/values/strings.commonMain.cvr
So, I guess this is a matter of packaging/moving stuff around in the final .app, but who is responsible for this? which task is not called?

[Olivier Patry]

Here are all strings.commonMain.cvr I can find

./my-module-shared/build/generated/compose/resourceGenerator/assembledResources/iosSimulatorArm64Main/composeResources/my.package.resources/values/strings.commonMain.cvr
./my-module-shared/build/generated/assets/copyReleaseComposeResourcesToAndroidAssets/composeResources/my.package.resources/values/strings.commonMain.cvr
./my-module-shared/build/generated/assets/copyDebugComposeResourcesToAndroidAssets/composeResources/my.package.resources/values/strings.commonMain.cvr
./my-module-shared/build/processedResources/iosSimulatorArm64/main/composeResources/my.package.resources/values/strings.commonMain.cvr
./my-module-shared/build/kotlin-multiplatform-resources/assemble-hierarchically/iosSimulatorArm64ResolveSelfResources/composeResources/my.package.resources/values/strings.commonMain.cvr
./my-module-shared/build/kotlin-multiplatform-resources/aggregated-resources/iosSimulatorArm64/composeResources/my.package.resources/values/strings.commonMain.cvr
./my-module-shared/build/intermediates/assets/release/mergeReleaseAssets/composeResources/my.package.resources/values/strings.commonMain.cvr
./my-module-shared/build/intermediates/assets/debug/mergeDebugAssets/composeResources/my.package.resources/values/strings.commonMain.cvr

[Olivier Patry]

When creating a whole new project from scratch, when I launch the Xcode launcher from IntelliJ, it properly triggers the Gradle build

Executing ':composeApp:embedAndSignAppleFrameworkForXcode'…

and I can see a bunch of other tasks like syncComposeResourcesForIos which is most likely what is missing on my side.

For my project, when I launch the Xcode launcher, no Gradle task is triggered, why is so? What controls this?

In the launcher, the configuration are similar between the 2 projects, and I have a "Build" dependency at bottom on both sides…

[Olivier Patry]

If I add specifically a Gradle task to the launcher in the "Before launch" section to trigger embedAndSignAppleFrameworkForXcode it fails telling me

Could not infer iOS target architectures. Make sure to build via XCode (directly or via Kotlin Multiplatform Mobile plugin for Android Studio)

like it does in CLI

The launcher do something under the hood, but what?! and why does it fail here?

[Olivier Patry]

I tried saving the launch config as project file to compare.
The config are strictly indentical (except indentation, don't know why and obviously, the scheme & target names which are different).

Interestingly, on my project, it suggested .idea/runConfigurations/MyApp.xml as output and on the other project, it was .run/iosApp.run.xml 🤔

[Olivier Patry]

Ok, so it appears I finally have a minimal reproducer…
I seems to be linked to the use of alternative Configuration like Config.dev.xcconfig.

When the PRODUCT_NAME or PRODUCT_BUNDLE_IDENTIFIER diverge, it seems I get the issue.

So, to reproduce, create a new project using the incubating wizard, only choose iOS.
Add a string resource instead of hardcoded strings within app.

Add a Config.dev.xcconfig near the default Config.xcconfig and reference it as a debug config in Xcode project for the iosApp configuration.

It's still not 100% reproducible with this minimal repro setup, sometimes, changing the values of Config.dev.xcconfig is not enough, changing few times is enough to reproduce at some point though.

[Olivier Patry]

That being said, in my "real use case", I think it's still slightly different, no Gradle task is invoked at all, here, I seems I have it.

I still don't understand who calls the Gradle tasks, when, how to control that…

At least, having some logs of what happens between the IDE, Gradle, Xcode, xcodebuild would be nice.

[Olivier Patry]

I opened KMT-1320

[Olivier Patry]

I also created KMT-1321 for Gradle not being called before running xcodebuild in my setup