I am trying to publish my KMM <library> to Maven, ...

# multiplatform

[Jeff Tycz]

I am trying to publish my KMM library to Maven, when I add the dependency into a non-KMM Android app I get this error

Execution failed for task ':app:checkDebugAarMetadata'.
> Could not resolve all files for configuration ':app:debugRuntimeClasspath'.
   > Could not resolve io.github.tyczj:tweedle-android:0.3.0.
     Required by:
         project :app
      > No matching variant of io.github.tyczj:tweedle-android:0.3.0 was found. The consumer was configured to find a runtime of a component, as well as attribute 'com.android.build.api.attributes.BuildTypeAttr' with value 'debug', attribute 'org.jetbrains.kotlin.platform.type' with value 'androidJvm' but:
          - Variant 'commonMainMetadataElements-published' capability io.github.tyczj:tweedle-android:0.3.0:
              - Incompatible because this component declares a usage of 'kotlin-api' of a component, as well as attribute 'org.jetbrains.kotlin.platform.type' with value 'common' and the consumer needed a runtime of a component, as well as attribute 'org.jetbrains.kotlin.platform.type' with value 'androidJvm'
              - Other compatible attribute:
                  - Doesn't say anything about com.android.build.api.attributes.BuildTypeAttr (required 'debug')
          - Variant 'metadataApiElements-published' capability io.github.tyczj:tweedle-android:0.3.0:
              - Incompatible because this component declares a usage of 'kotlin-metadata' of a component, as well as attribute 'org.jetbrains.kotlin.platform.type' with value 'common' and the consumer needed a runtime of a component, as well as attribute 'org.jetbrains.kotlin.platform.type' with value 'androidJvm'
              - Other compatible attribute:
                  - Doesn't say anything about com.android.build.api.attributes.BuildTypeAttr (required 'debug')
          - Variant 'releaseApiElements-published' capability io.github.tyczj:tweedle-android:0.3.0 declares a component, as well as attribute 'org.jetbrains.kotlin.platform.type' with value 'androidJvm':
              - Incompatible because this component declares an API of a component, as well as attribute 'com.android.build.api.attributes.BuildTypeAttr' with value 'release' and the consumer needed a runtime of a component, as well as attribute 'com.android.build.api.attributes.BuildTypeAttr' with value 'debug'
          - Variant 'releaseRuntimeElements-published' capability io.github.tyczj:tweedle-android:0.3.0 declares a runtime of a component, as well as attribute 'org.jetbrains.kotlin.platform.type' with value 'androidJvm':
              - Incompatible because this component declares a component, as well as attribute 'com.android.build.api.attributes.BuildTypeAttr' with value 'release' and the consumer needed a component, as well as attribute 'com.android.build.api.attributes.BuildTypeAttr' with value 'debug'

The KMM module works fine if the app references it locally. I am not sure what I need to do to be able to use the Android dependency correctly, this is my first time making a KMM library

[russhwolf]

Looks like you only publish the release version of the library, so the app can't find it when it's in debug mode. The solution is either to publish the debug version of the library, or specify matchingFallbacks in the app. Some details here https://kotlinlang.org/docs/mpp-publish-lib.html#publish-an-android-library

[Jeff Tycz]

I added this after to try things and it still gave the same error

android{
    publishLibraryVariants("release", "debug")
}

[russhwolf]

In that case I'm not sure. Maybe try matchingFallbacks anyway