IssueTracker

When using manifests.addGeneratedManifestFile on the androidTest configuration for a Variant, the manifest is generated but not merged into the androidTest APK.

So if you had a project or configuration plugin that declared:

androidComponents {  
  finalizeDsl {
    onVariants { variant ->
      val generateCustomManifestTask = target.tasks.register<GenerateCustomManifestTask>("generate${variant.name.capitalized()}CustomManifest")
      variant.androidTest?.sources?.manifests?.addGeneratedManifestFile(generateCustomManifestTask, GenerateCustomManifestTask::manifestProperty)
    }
  }
}

where GenerateCustomManifestTask is:

@CacheableTask
abstract class GenerateCustomManifestTask : DefaultTask() {
    @get:OutputFile
    abstract val manifestProperty: RegularFileProperty

    @TaskAction
    fun generateManifest() {
        val manifest =
        //language xml
        """
            <?xml version="1.0" encoding="utf-8"?>
            <manifest xmlns:android="http://schemas.android.com/apk/res/android"
                android:versionCode="00000000"
                android:versionName="0.0.0">
            
                <application android:name="com.test.Application" />
            </manifest>
        """.trimIndent()
        val manifestFile = manifestProperty.get().asFile
        manifestFile.writeText(manifest)
    }
}

build/generated/generateDebugCustomManifest/AndroidManifest.xml is generated but build/intermediates/packaged_manifests/processDebugAndroidTestManifest/AndroidManifest.xml has none of the attributes from the generated manifest

AGP 8.4.0, since that's when manifests was introduced