flavorDimensions gradle error - Android Studio 3.0 Canary 1

Question

I would like to upgrade my project to Android Studio 3.0 Canary 1 and the gradle:3.0.0-alpha1 plugin, however I have a problem with the correct definition of flavors for included projects.

I followed the official migration guide from Google: https://developer.android.com/studio/preview/features/new-android-plugin-migration.html

In my main app build.gradle I defined the "myflavor" flavorDimensions, as recommended by the migration guide:

android {
    flavorDimensions "myflavor"

    productFlavors {
        dev {
            dimension "myflavor"
            minSdkVersion 21
        }
        prod {
            dimension "myflavor"
            minSdkVersion 16
        }
    }

    buildTypes {
        debug {
            signingConfig signingConfigs.debug
        }

        release {
            debuggable false

            signingConfig signingConfigs.release

            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
}

dependencies {
    compile project(':util')
}

In my included :util module (producer), I tried to include it withouth a definition of flavorDimensions, productFlavors and buildTypes. I get the following gradle error:

Error:Could not resolve all dependencies for configuration ':app:prodDebugCompileClasspath'.
  Cannot choose between the following configurations on project :util:
    - debugApiElements
    - releaseApiElements
  All of them match the consumer attributes:
    - Configuration 'debugApiElements':
        - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'AndroidTypeAttr{name=Aar}' but no value provided.
        - Found com.android.build.gradle.internal.dependency.AndroidTypeAttr 'AndroidTypeAttr{name=Aar}' but wasn't required.
        - Required com.android.build.gradle.internal.dependency.BuildTypeAttr 'BuildTypeAttr{name=debug}' but no value provided.
        - Found com.android.build.gradle.internal.dependency.BuildTypeAttr 'BuildTypeAttr{name=debug}' but wasn't required.
        - Found com.android.build.gradle.internal.dependency.VariantAttr 'VariantAttr{name=debug}' but wasn't required.
        - Required myflavor 'ProductFlavorAttr{name=prod}' but no value provided.
        - Required org.gradle.api.attributes.Usage 'for compile' and found compatible value 'for compile'.
    - Configuration 'releaseApiElements':
        - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'AndroidTypeAttr{name=Aar}' but no value provided.
        - Found com.android.build.gradle.internal.dependency.AndroidTypeAttr 'AndroidTypeAttr{name=Aar}' but wasn't required.
        - Required com.android.build.gradle.internal.dependency.BuildTypeAttr 'BuildTypeAttr{name=debug}' but no value provided.
        - Found com.android.build.gradle.internal.dependency.BuildTypeAttr 'BuildTypeAttr{name=release}' but wasn't required.
        - Found com.android.build.gradle.internal.dependency.VariantAttr 'VariantAttr{name=release}' but wasn't required.
        - Required myflavor 'ProductFlavorAttr{name=prod}' but no value provided.
        - Required org.gradle.api.attributes.Usage 'for compile' and found compatible value 'for compile'.

When defining the same flavorDimensions, productFlavors and buildTypes in :util as in the main :app, I get the following error message:

Error:Could not resolve all dependencies for configuration ':app:prodDebugCompileClasspath'.
Cannot choose between the following configurations on project :util:
  - devDebugApiElements
  - devReleaseApiElements
  - prodDebugApiElements
  - prodReleaseApiElements
All of them match the consumer attributes:
  - Configuration 'devDebugApiElements':
      - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'AndroidTypeAttr{name=Aar}' but no value provided.
      - Found com.android.build.gradle.internal.dependency.AndroidTypeAttr 'AndroidTypeAttr{name=Aar}' but wasn't required.
      - Required com.android.build.gradle.internal.dependency.BuildTypeAttr 'BuildTypeAttr{name=debug}' but no value provided.
      - Found com.android.build.gradle.internal.dependency.BuildTypeAttr 'BuildTypeAttr{name=debug}' but wasn't required.
      - Found com.android.build.gradle.internal.dependency.VariantAttr 'VariantAttr{name=devDebug}' but wasn't required.
      - Required myflavor 'ProductFlavorAttr{name=prod}' but no value provided.
      - Found myflavor 'ProductFlavorAttr{name=dev}' but wasn't required.
      - Required org.gradle.api.attributes.Usage 'for compile' and found compatible value 'for compile'.
  - Configuration 'devReleaseApiElements':
      - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'AndroidTypeAttr{name=Aar}' but no value provided.
      - Found com.android.build.gradle.internal.dependency.AndroidTypeAttr 'AndroidTypeAttr{name=Aar}' but wasn't required.
      - Required com.android.build.gradle.internal.dependency.BuildTypeAttr 'BuildTypeAttr{name=debug}' but no value provided.
      - Found com.android.build.gradle.internal.dependency.BuildTypeAttr 'BuildTypeAttr{name=release}' but wasn't required.
      - Found com.android.build.gradle.internal.dependency.VariantAttr 'VariantAttr{name=devRelease}' but wasn't required.
      - Required myflavor 'ProductFlavorAttr{name=prod}' but no value provided.
      - Found myflavor 'ProductFlavorAttr{name=dev}' but wasn't required.
      - Required org.gradle.api.attributes.Usage 'for compile' and found compatible value 'for compile'.
  - Configuration 'prodDebugApiElements':
      - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'AndroidTypeAttr{name=Aar}' but no value provided.
      - Found com.android.build.gradle.internal.dependency.AndroidTypeAttr 'AndroidTypeAttr{name=Aar}' but wasn't required.
      - Required com.android.build.gradle.internal.dependency.BuildTypeAttr 'BuildTypeAttr{name=debug}' but no value provided.
      - Found com.android.build.gradle.internal.dependency.BuildTypeAttr 'BuildTypeAttr{name=debug}' but wasn't required.
      - Found com.android.build.gradle.internal.dependency.VariantAttr 'VariantAttr{name=prodDebug}' but wasn't required.
      - Required myflavor 'ProductFlavorAttr{name=prod}' but no value provided.
      - Found myflavor 'ProductFlavorAttr{name=prod}' but wasn't required.
      - Required org.gradle.api.attributes.Usage 'for compile' and found compatible value 'for compile'.
  - Configuration 'prodReleaseApiElements':
      - Required com.android.build.gradle.internal.dependency.AndroidTypeAttr 'AndroidTypeAttr{name=Aar}' but no value provided.
      - Found com.android.build.gradle.internal.dependency.AndroidTypeAttr 'AndroidTypeAttr{name=Aar}' but wasn't required.
      - Required com.android.build.gradle.internal.dependency.BuildTypeAttr 'BuildTypeAttr{name=debug}' but no value provided.
      - Found com.android.build.gradle.internal.dependency. 'BuildTypeAttr{name=release}' but wasn't required.
      - Found com.android.build.gradle.internal.dependency.VariantAttr 'VariantAttr{name=prodRelease}' but wasn't required.
      - Required myflavor 'ProductFlavorAttr{name=prod}' but no value provided.
      - Found myflavor 'ProductFlavorAttr{name=prod}' but wasn't required.
      - Required org.gradle.api.attributes.Usage 'for compile' and found compatible value 'for compile'.

What is the correct way to include my :util lib without getting the error?

Answer 1

Seems like a bug in the Gradle build process, I'm not quite sure why exactly it's not working. I was stuck on this for a while but I was able to fix it by changing

compile project(':util')

to

compile project(path: ':util', configuration: 'default')

Let me know if this works for you!

Answer 2

I had a similar issue using Canary 2, but the proposed solution didn't work. Apparently there is a way to use the implementation from a Local library or project:

// This is the old method and no longer works for local
// library modules:
// debugCompile project(path: ':foo', configuration: 'debug')
// releaseCompile project(path: ':foo', configuration: 'release')

// Instead, simply use the following to take advantage of
// variant-aware dependency resolution. You can learn more about
// the 'implementation' configuration in the section about
// new dependency configurations.
implementation project(':foo')

Reference from Studio Documentation.