Duplicate bindings created for multiple @MergeComponents of the same scope

[RBusarow]

There must be two components in a classpath. It doesn't matter if they're in the same Gradle module, or the same package, or if one of those components is in test source.

My specific issue was for creating duplicate bindings for TestAppComponent when I'd already created them for AppComponent in the same (Gradle) module.

Example:

src/java/main/com/example/app/Component.kt

package com.example.app

@MergeComponent(AppScope::class)
interface Component

src/java/test/com/example/app/TestComponent.kt

package com.example.app

@MergeComponent(AppScope::class)
interface TestComponent

Tangle just looked for the @MergeComponent annotation, and creates essentially the same code for both:

@Module
@ContributesTo(Unit::class)
public interface Unit_Tangle_FragmentFactory_Module {
  @Multibinds
  public fun bindProviderMap(): Map<Class<out androidx.fragment.app.Fragment>, @JvmSuppressWildcards
      Fragment>

  @Multibinds
  @TangleFragmentProviderMap
  public fun bindTangleProviderMap(): Map<Class<out androidx.fragment.app.Fragment>,
      @JvmSuppressWildcards Fragment>

  public companion object {
    @Provides
    public
        fun provideTangleFragmentFactory(providerMap: Map<Class<out androidx.fragment.app.Fragment>,
        @JvmSuppressWildcards Provider<@JvmSuppressWildcards Fragment>>, @TangleFragmentProviderMap
        tangleProviderMap: Map<Class<out androidx.fragment.app.Fragment>, @JvmSuppressWildcards
        Provider<@JvmSuppressWildcards Fragment>>): TangleFragmentFactory =
        TangleFragmentFactory(providerMap, tangleProviderMap)
  }
}

And that provideTangleFragmentFactory function creates issues. There's a similar problem with the Subcomponent factory bindings created for ViewModels.

If this was just vanilla Dagger, the fix would be to make the generated module internal, since it's in the same package as the component and only needs to be visible right there. However, Anvil doesn't support internal modifiers.

[RBusarow]

Still broken for ViewModels. I missed it thanks to a build cache issue.