I am currently writing a ksp processor which gener...

# dagger

[Kshitij Patil]

I am currently writing a ksp processor which generates FooImpl for an interface Foo when annotated. Now I want dagger to know binding Foo with FooImpl from my generated code. Adding simple @Inject to the constructor of generated class doesn’t work, I guess because the code is not available at compile time. How can I achieve this?

[Kshitij Patil]

Was curious if I could use anvil for this?
cc: @ralf

[Paul Woitaschek]

Add it in a separate module. Then it will be compiled when dagger processes it

[Paul Woitaschek]

As a second step you can use anvil to generate the factories

[Marcello Galhardo]

You should create a module that binds the interface to the implementation.

@Module
interface FooModule {
  @Binds
  fun FooImpl.bindFoo(): Foo
}

You may or may not want to generate the module code too. After that, you need to connect the module to the dagger Component.

If you use Anvil you can generate FooImpl with @ContributesBinding instead, and Anvil will generate the module for you.

If you use Hilt you can use InstallIn in the module to automatically connect to a given Component.